[libgda: 1/2] Misc corrections in GdaDB module



commit 9f4fead500cb284ed50a5f8560e7b9c9de107988
Author: Pavlo Solntsev <p sun fun gmail com>
Date:   Fri Feb 15 14:12:34 2019 -0600

    Misc corrections in GdaDB module
    
    This path includes misc correction for documentation, parameter
    checking, formating. White spaces were removed.

 libgda/gda-connection.c   |   4 +-
 libgda/gda-db-base.c      |  66 +++++-----
 libgda/gda-db-buildable.c |  24 ++--
 libgda/gda-db-buildable.h |  11 +-
 libgda/gda-db-catalog.c   | 230 +++++++++++++++++++----------------
 libgda/gda-db-catalog.h   |  11 +-
 libgda/gda-db-column.c    | 302 ++++++++++++++++++++++++----------------------
 libgda/gda-db-column.h    |   5 +-
 libgda/gda-db-fkey.c      | 154 +++++++++++------------
 libgda/gda-db-table.c     | 255 ++++++++++++++++++++------------------
 libgda/gda-db-view.c      | 214 ++++++++++++++++----------------
 libgda/gda-db-view.h      |  16 ---
 12 files changed, 675 insertions(+), 617 deletions(-)
---
diff --git a/libgda/gda-connection.c b/libgda/gda-connection.c
index 568e91fe5..1ff77be86 100644
--- a/libgda/gda-connection.c
+++ b/libgda/gda-connection.c
@@ -7224,8 +7224,8 @@ gda_connection_operation_get_sql_identifier_at_path (GdaConnection *cnc, GdaServ
  * gda_connection_create_db_catalog:
  * @cnc: A #GdaConnection object to use
  *
- * A convenient method to create a new #GdaDbCreator instance and set the current @cnc as a
- * property.  If for some reason, this approach doesn't fit well, the same task can be achieved 
+ * A convenient method to create a new #GdaDbCatalog instance and set the current @cnc as a
+ * property.  If for some reason, this approach doesn't fit well, the same task can be achieved
  * by the following code:
  *
  * GdaDbCatalog *catalog = gda_db_catalog_new ();
diff --git a/libgda/gda-db-base.c b/libgda/gda-db-base.c
index db55ef303..98bd1ee6a 100644
--- a/libgda/gda-db-base.c
+++ b/libgda/gda-db-base.c
@@ -29,14 +29,14 @@ typedef struct
 } GdaDbBasePrivate;
 
 /**
- * SECTION:gda-db-base 
+ * SECTION:gda-db-base
  * @short_description: The basic class for all database objects
  * @see_also: #GdaDbTable, #GdaDbView
  * @stability: Stable
  * @include: libgda/libgda.h
  *
  * This is a basic class for database objects, e.g. #GdaDbTable and #GdaDbView. It is not common to
- * use it directly. 
+ * use it directly.
  */
 
 G_DEFINE_TYPE_WITH_PRIVATE (GdaDbBase, gda_db_base, G_TYPE_OBJECT)
@@ -46,7 +46,7 @@ G_DEFINE_TYPE_WITH_PRIVATE (GdaDbBase, gda_db_base, G_TYPE_OBJECT)
  *
  * Create a new #GdaDbBase instance
  *
- * Returns: a new #GdaDbBase instance 
+ * Returns: a new #GdaDbBase instance
  */
 GdaDbBase*
 gda_db_base_new (void)
@@ -95,7 +95,7 @@ gda_db_base_init (GdaDbBase *self)
  * @name: a table name associated with the table
  *
  * Sets database object names. @catalog and @schema can be %NULL but
- * @name always should be a valid, not %NULL string. The @name must be always
+ * @name always should be a valid, not %NULL string. The @name must be
  * set. If @catalog is %NULL @schema may not be %NULL but if @schema is
  * %NULL @catalog also should be %NULL.
  *
@@ -132,12 +132,12 @@ gda_db_base_set_names (GdaDbBase *self,
   fullnamestr = g_string_new (NULL);
 
   if (priv->m_catalog && priv->m_schema)
-    g_string_printf (fullnamestr,"%s.%s.%s",priv->m_catalog,
-                     priv->m_schema,priv->m_name);
+    g_string_printf (fullnamestr, "%s.%s.%s", priv->m_catalog,
+                     priv->m_schema, priv->m_name);
   else if (priv->m_schema)
-    g_string_printf (fullnamestr,"%s.%s",priv->m_schema,priv->m_name);
+    g_string_printf (fullnamestr, "%s.%s", priv->m_schema, priv->m_name);
   else
-    g_string_printf (fullnamestr,"%s",priv->m_name);
+    g_string_printf (fullnamestr, "%s", priv->m_name);
 
   priv->m_fullname = g_strdup (fullnamestr->str);
   g_string_free (fullnamestr, TRUE);
@@ -159,7 +159,7 @@ gda_db_base_set_names (GdaDbBase *self,
 const gchar*
 gda_db_base_get_full_name (GdaDbBase *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
@@ -168,12 +168,12 @@ gda_db_base_get_full_name (GdaDbBase *self)
   fullnamestr = g_string_new (NULL);
 
   if (priv->m_catalog && priv->m_schema && priv->m_name)
-    g_string_printf (fullnamestr,"%s.%s.%s",priv->m_catalog,
-                     priv->m_schema,priv->m_name);
+    g_string_printf (fullnamestr, "%s.%s.%s", priv->m_catalog,
+                     priv->m_schema, priv->m_name);
   else if (priv->m_schema && priv->m_name)
-    g_string_printf (fullnamestr,"%s.%s",priv->m_schema,priv->m_name);
+    g_string_printf (fullnamestr, "%s.%s", priv->m_schema, priv->m_name);
   else if (priv->m_name)
-    g_string_printf (fullnamestr,"%s",priv->m_name);
+    g_string_printf (fullnamestr, "%s", priv->m_name);
   else
     return NULL;
 
@@ -194,9 +194,9 @@ gda_db_base_get_full_name (GdaDbBase *self)
  * Since: 6.0
  */
 const gchar*
-gda_db_base_get_catalog (GdaDbBase  *self)
+gda_db_base_get_catalog (GdaDbBase *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
@@ -209,14 +209,14 @@ gda_db_base_get_catalog (GdaDbBase  *self)
  *
  * Returns current schema name. The returned string should not be freed.
  *
- * Returns: Current catalog or %NULL
+ * Returns: Current scheme or %NULL
  *
  * Since: 6.0
  */
 const gchar*
-gda_db_base_get_schema (GdaDbBase  *self)
+gda_db_base_get_schema (GdaDbBase *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
@@ -234,9 +234,9 @@ gda_db_base_get_schema (GdaDbBase  *self)
  * Since: 6.0
  */
 const gchar*
-gda_db_base_get_name (GdaDbBase  *self)
+gda_db_base_get_name (GdaDbBase *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
@@ -247,7 +247,7 @@ gda_db_base_get_name (GdaDbBase  *self)
  * gda_db_base_set_catalog:
  * @self: a #GdaDbBase instance
  * @catalog: Catalog name as a string
- * 
+ *
  * Set catalog name
  *
  * Since: 6.0
@@ -269,7 +269,7 @@ gda_db_base_set_catalog (GdaDbBase  *self,
  * @self: a #GdaDbBase instance
  * @schema: Schema name as a string
  *
- * Set object schema.
+ * Set object schema. If @schema is %NULL the function just returns.
  *
  * Since: 6.0
  */
@@ -279,6 +279,9 @@ gda_db_base_set_schema (GdaDbBase  *self,
 {
   g_return_if_fail (self);
 
+  if (!schema)
+    return;
+
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
   g_free (priv->m_schema);
@@ -289,8 +292,8 @@ gda_db_base_set_schema (GdaDbBase  *self,
  * gda_db_base_set_name:
  * @self: a #GdaDbBase instance
  * @name: Object name as a string
- * 
- * Set object name
+ *
+ * Set object name. If @name is %NULL the function just returns.
  *
  * Since: 6.0
  */
@@ -300,6 +303,9 @@ gda_db_base_set_name (GdaDbBase  *self,
 {
   g_return_if_fail (self);
 
+  if (!name)
+    return;
+
   GdaDbBasePrivate *priv = gda_db_base_get_instance_private (self);
 
   g_free (priv->m_name);
@@ -311,7 +317,7 @@ gda_db_base_set_name (GdaDbBase  *self,
  * @a: first #GdaDbBase object
  * @b: second #GdaDbBase object
  *
- * Compares two objects similar to g_strcmp(). 
+ * Compares two objects similar to g_strcmp().
  *
  * Returns: 0 if catalog, schema and name are the same
  *
@@ -327,15 +333,15 @@ gda_db_base_compare (GdaDbBase *a,
     return -1;
   else if (a && !b)
     return 1;
- 
-  gint res = g_strcmp0 (gda_db_base_get_name(a),gda_db_base_get_name(b));
+
+  gint res = g_strcmp0 (gda_db_base_get_name(a), gda_db_base_get_name(b));
 
   if (!res)
     {
-      res = g_strcmp0 (gda_db_base_get_catalog(a),gda_db_base_get_catalog(b));
-      
+      res = g_strcmp0 (gda_db_base_get_catalog(a), gda_db_base_get_catalog(b));
+
       if (!res)
-        return g_strcmp0(gda_db_base_get_schema(a),gda_db_base_get_schema(b));  
+        return g_strcmp0(gda_db_base_get_schema(a), gda_db_base_get_schema(b));
       else
         return res;
     }
diff --git a/libgda/gda-db-buildable.c b/libgda/gda-db-buildable.c
index f84132298..8bd28f91e 100644
--- a/libgda/gda-db-buildable.c
+++ b/libgda/gda-db-buildable.c
@@ -32,7 +32,7 @@ G_DEFINE_INTERFACE (GdaDbBuildable, gda_db_buildable, G_TYPE_OBJECT)
  * @include: libgda/gda-db-buildable.h
  *
  * #GdaDbBuildable represents an interface for writing and reading xml nodes. #GdaDbTable and
- * #GdaDbView implement this interface.  
+ * #GdaDbView implement this interface.
  */
 
 static void
@@ -45,9 +45,9 @@ gda_db_buildable_default_init (GdaDbBuildableInterface *iface)
  * gda_db_buildable_parse_node:
  * @self: an instance of #GdaDbBuildable where parsed data should be storred
  * @node: a node to parse
- * @error: (nullable): an object to store error
+ * @error: (nullable): an object to store the error
  *
- * Parse xml node
+ * This method parse XML node and populate @self object.
  *
  * Returns: %TRUE on success, %FALSE if an error occurred
  * Since: 6.0
@@ -58,23 +58,23 @@ gda_db_buildable_parse_node (GdaDbBuildable  *self,
                              xmlNodePtr        node,
                              GError         **error)
 {
-  GdaDbBuildableInterface *iface;
+  GdaDbBuildableInterface *iface = NULL;
 
-  g_return_val_if_fail (GDA_IS_DB_BUILDABLE (self),FALSE);
-  g_return_val_if_fail (error == NULL || *error == NULL,FALSE);
+  g_return_val_if_fail (GDA_IS_DB_BUILDABLE (self), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   iface = GDA_DB_BUILDABLE_GET_IFACE (self);
-  g_return_val_if_fail (iface->parse_node != NULL,FALSE);
+  g_return_val_if_fail (iface->parse_node != NULL, FALSE);
   return iface->parse_node (self, node, error);
 }
 
 /**
  * gda_db_buildable_write_node:
- * @self: an instance of #GdaDbBuildable where data should be taken 
+ * @self: an instance of #GdaDbBuildable where data should be taken
  * @node: a node to write data in
  * @error: (nullable): an object to store error
  *
- * Write content from the @self to the @node 
+ * Write content from the @self to the @node
  *
  * Returns: %TRUE on success, %FALSE if an error occurred
  * Since: 6.0
@@ -87,11 +87,11 @@ gda_db_buildable_write_node (GdaDbBuildable *self,
 {
   GdaDbBuildableInterface *iface;
 
-  g_return_val_if_fail (GDA_IS_DB_BUILDABLE (self),FALSE);
-  g_return_val_if_fail (error == NULL || *error == NULL,FALSE);
+  g_return_val_if_fail (GDA_IS_DB_BUILDABLE (self), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   iface = GDA_DB_BUILDABLE_GET_IFACE (self);
-  g_return_val_if_fail (iface->write_node != NULL,FALSE);
+  g_return_val_if_fail (iface->write_node != NULL, FALSE);
   return iface->write_node (self, node, error);
 }
 
diff --git a/libgda/gda-db-buildable.h b/libgda/gda-db-buildable.h
index d2ee275c6..dd82b55e7 100644
--- a/libgda/gda-db-buildable.h
+++ b/libgda/gda-db-buildable.h
@@ -29,7 +29,8 @@
 G_BEGIN_DECLS
 
 #define GDA_TYPE_DB_BUILDABLE gda_db_buildable_get_type ()
-G_DECLARE_INTERFACE(GdaDbBuildable, gda_db_buildable,GDA, DB_BUILDABLE,GObject)
+
+G_DECLARE_INTERFACE(GdaDbBuildable, gda_db_buildable, GDA, DB_BUILDABLE, GObject)
 
 struct _GdaDbBuildableInterface
 {
@@ -45,12 +46,12 @@ struct _GdaDbBuildableInterface
 };
 
 gboolean gda_db_buildable_parse_node (GdaDbBuildable *self,
-                                       xmlNodePtr node,
-                                       GError **error);
+                                      xmlNodePtr node,
+                                      GError **error);
 
 gboolean gda_db_buildable_write_node (GdaDbBuildable *self,
-                                       xmlNodePtr node,
-                                       GError **error);
+                                      xmlNodePtr node,
+                                      GError **error);
 
 G_END_DECLS
 
diff --git a/libgda/gda-db-catalog.c b/libgda/gda-db-catalog.c
index 7c67af571..f89400422 100644
--- a/libgda/gda-db-catalog.c
+++ b/libgda/gda-db-catalog.c
@@ -45,17 +45,20 @@ typedef struct
 /**
  * SECTION:gda-db-catalog
  * @title: GdaDbCatalog
- * @short_description: Object to constract database representation from an xml file or by reading the 
existing datatabase 
+ * @short_description: Object to constract database representation from an xml file or by reading
+ * the existing datatabase
  * @see_also: #GdaDbTable, #GdaDbView
  * @stability: Stable
  * @include: libgda/libgda.h
  *
- * This is a main object that represents overall database. In can be constracted from an xml 
- * file using gda_db_catalog_parse_file() or gda_db_creator_parse_file_from_path(). It can also
- * be constracted from an open connection using gda_db_catalog_parse_cnc(). The database can be
- * updated using gda_db_catalog_perform_operation() and dumped to a file using
- * gda_db_catalog_write_to_path() and gda_db_creator_write_to_file(). 
- *  
+ * This is a main object that represents overall database. The best way to create an instance of
+ * #GdaDbCatalog is to call gda_connection_create_db_catalog(). This object may be also constracted
+ * from an xml file using gda_db_catalog_parse_file() or gda_db_catalog_parse_file_from_path() or
+ * didrectly from the open connection using gda_db_catalog_parse_cnc().
+ *
+ * The database can be updated or modified using gda_db_catalog_perform_operation() and dumped to
+ * a file using gda_db_catalog_write_to_path() or gda_db_catalog_write_to_file().
+ *
  */
 
 G_DEFINE_TYPE_WITH_PRIVATE (GdaDbCatalog, gda_db_catalog, G_TYPE_OBJECT)
@@ -207,7 +210,7 @@ static gboolean
 _gda_db_catalog_validate_doc (xmlDocPtr doc,
                               GError **error)
 {
-  g_return_val_if_fail (doc,FALSE);
+  g_return_val_if_fail (doc, FALSE);
 
   xmlValidCtxtPtr  ctx = NULL;
 
@@ -222,7 +225,7 @@ _gda_db_catalog_validate_doc (xmlDocPtr doc,
       goto on_error;
     }
 
-  int valid = xmlValidateDtd (ctx,doc,_gda_db_catalog_dtd);
+  int valid = xmlValidateDtd (ctx, doc,_gda_db_catalog_dtd);
 
   if (!valid)
     {
@@ -249,7 +252,7 @@ on_error:
  *
  * Internal method to populate #GdaDbCatalog from @doc instance.
  *
- * Returns: %TRUE if no errors, %FALSE otherwise. 
+ * Returns: %TRUE if no errors, %FALSE otherwise.
  *
  */
 static gboolean
@@ -257,8 +260,8 @@ _gda_db_catalog_parse_doc (GdaDbCatalog *self,
                            xmlDocPtr doc,
                            GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (doc,FALSE);
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (doc, FALSE);
 
   xmlChar         *schema_name = NULL;
   xmlNodePtr       node        = NULL;
@@ -279,7 +282,7 @@ _gda_db_catalog_parse_doc (GdaDbCatalog *self,
   schema_name = xmlGetProp(node,(xmlChar *)"name");
 //  g_assert (schema_name); /* If schema_name == NULL we have problem with validation */
   if (schema_name)
-    g_object_set (self,"schema_name",(char*)schema_name,NULL);
+    g_object_set (self, "schema_name", (char*)schema_name, NULL);
 
   xmlFree (schema_name);
 
@@ -313,7 +316,7 @@ _gda_db_catalog_parse_doc (GdaDbCatalog *self,
             goto on_error;
           }
         else
-          priv->mp_views = g_list_append (priv->mp_views,view);
+          priv->mp_views = g_list_append (priv->mp_views, view);
       }  /* end of else if */
   } /* End of for loop */
 
@@ -337,12 +340,12 @@ on_error:
  * |[<!-- language="DTD" -->
  * <!ELEMENT schema (table+, view*)>
  * <!ATTLIST schema name           CDATA   #IMPLIED>
- * 
+ *
  * <!ELEMENT table (comment?,column+, fkey*)>
  * <!ATTLIST table temptable       (TRUE|FALSE)    "FALSE">
  * <!ATTLIST table name            CDATA           #REQUIRED>
  * <!ATTLIST table space           CDATA           #IMPLIED>
- * 
+ *
  * <!ELEMENT column (comment?, value?, check?)>
  * <!ATTLIST column name           CDATA           #REQUIRED>
  * <!ATTLIST column type           CDATA           #REQUIRED>
@@ -350,29 +353,29 @@ on_error:
  * <!ATTLIST column unique         (TRUE|FALSE)    "FALSE">
  * <!ATTLIST column autoinc        (TRUE|FALSE)    "FALSE">
  * <!ATTLIST column nnul           (TRUE|FALSE)    "FALSE">
- * 
+ *
  * <!ELEMENT comment       (#PCDATA)>
  * <!ELEMENT value         (#PCDATA)>
  * <!ATTLIST value size            CDATA          #IMPLIED>
  * <!ATTLIST value scale           CDATA          #IMPLIED>
- * 
+ *
  * <!ELEMENT check         (#PCDATA)>
- * 
+ *
  * <!ELEMENT fkey (fk_field?)>
  * <!ATTLIST fkey reftable CDATA #IMPLIED>
  * <!ATTLIST fkey onupdate (RESTRICT|CASCADE|SET_NULL|NO_ACTION|SET_DEFAULT)       #IMPLIED>
  * <!ATTLIST fkey ondelete (RESTRICT|CASCADE|SET_NULL|NO_ACTION|SET_DEFAULT)       #IMPLIED>
- * 
+ *
  * <!ELEMENT fk_field (#PCDATA)>
  * <!ATTLIST fk_field name         CDATA           #REQUIRED>
  * <!ATTLIST fk_field reffield     CDATA           #REQUIRED>
- * 
+ *
  * <!ELEMENT view (definition)>
  * <!ATTLIST view name             CDATA           #REQUIRED>
  * <!ATTLIST view replace          (TRUE|FALSE)    "FALSE">
  * <!ATTLIST view temp             (TRUE|FALSE)    "FALSE">
  * <!ATTLIST view ifnotexists      (TRUE|FALSE)    "TRUE">
- * 
+ *
  * <!ELEMENT definition (#PCDATA)>
  * ]|
  *
@@ -381,8 +384,9 @@ on_error:
  * (https://gitlab.gnome.org/GNOME/libgda/blob/master/libgda/libgda-db-catalog.dtd)
  *
  * The given @xmlfile will be checked before parsing and %FALSE will be
- * returned if fails. The @xmlfile will be validated internally.
- * The same method can be used to validate xmlfile before parsing it.
+ * returned if fails. The @xmlfile will be validated internally using
+ * gda_db_catalog_validate_to_file() or gda_db_catalog_validate_to_path() methods.
+ * The same methods can be used to validate xmlfile before parsing it.
  */
 gboolean
 gda_db_catalog_parse_file_from_path (GdaDbCatalog *self,
@@ -395,7 +399,7 @@ gda_db_catalog_parse_file_from_path (GdaDbCatalog *self,
 
   xmlDocPtr doc = NULL;
 
-  doc = xmlParseFile(xmlfile);
+  doc = xmlParseFile (xmlfile);
 
   if (!doc)
     {
@@ -406,7 +410,7 @@ gda_db_catalog_parse_file_from_path (GdaDbCatalog *self,
       goto on_error;
     }
 
-  if (!_gda_db_catalog_validate_doc (doc,error))
+  if (!_gda_db_catalog_validate_doc (doc, error))
     {
       g_set_error (error,
                    GDA_DB_CATALOG_ERROR,
@@ -415,9 +419,9 @@ gda_db_catalog_parse_file_from_path (GdaDbCatalog *self,
       goto on_error;
     }
 
-  if (!_gda_db_catalog_parse_doc (self,doc,error))
+  if (!_gda_db_catalog_parse_doc (self, doc, error))
     goto on_error;
-  
+
   xmlFreeDoc (doc);
   return TRUE;
 
@@ -442,8 +446,8 @@ gboolean
 gda_db_catalog_validate_file_from_path (const gchar *xmlfile,
                                         GError **error)
 {
-  g_return_val_if_fail (xmlfile,FALSE);
-  g_return_val_if_fail (_gda_db_catalog_dtd,FALSE);
+  g_return_val_if_fail (xmlfile, FALSE);
+  g_return_val_if_fail (_gda_db_catalog_dtd, FALSE);
 
   xmlDocPtr doc = NULL;
 
@@ -458,7 +462,7 @@ gda_db_catalog_validate_file_from_path (const gchar *xmlfile,
       goto on_error;
     }
 
-  if (!_gda_db_catalog_validate_doc (doc,error))
+  if (!_gda_db_catalog_validate_doc (doc, error))
     goto on_error;
 
   xmlFreeDoc (doc);
@@ -474,13 +478,15 @@ on_error:
  * gda_db_catalog_get_tables:
  * @self: a #GdaDbCatalog object
  *
- * Returns: (element-type Gda.DbTable) (transfer none): a list of tables
+ * Returns: (element-type Gda.DbTable) (transfer none): a list of tables as #GdaDbTable or %NULL.
  *
  * Since: 6.0
  */
 GList*
 gda_db_catalog_get_tables (GdaDbCatalog *self)
 {
+  g_return_val_if_fail (self, NULL);
+
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
   return priv->mp_tables;
 }
@@ -489,13 +495,15 @@ gda_db_catalog_get_tables (GdaDbCatalog *self)
  * gda_db_catalog_get_views:
  * @self: a #GdaDbCatalog object
  *
- * Returns: (element-type Gda.DbView) (transfer none): a list of views
+ * Returns: (element-type Gda.DbView) (transfer none): a list of views as #GdaDbView or %NULL
  *
  * Since: 6.0
  */
 GList*
 gda_db_catalog_get_views (GdaDbCatalog *self)
 {
+  g_return_val_if_fail (self, NULL);
+
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
   return priv->mp_views;
 }
@@ -516,13 +524,13 @@ gda_db_catalog_get_table (GdaDbCatalog *self,
                           const gchar *schema,
                           const gchar *name)
 {
-  g_return_val_if_fail (self,NULL);
-  g_return_val_if_fail (name,NULL);
+  g_return_val_if_fail (self, NULL);
+  g_return_val_if_fail (name, NULL);
 
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
 
   GdaDbBase *iobj = gda_db_base_new ();
-  gda_db_base_set_names (iobj,catalog,schema,name);
+  gda_db_base_set_names (iobj, catalog, schema, name);
 
   GList *it = NULL;
 
@@ -542,9 +550,9 @@ gda_db_catalog_get_table (GdaDbCatalog *self,
  * @self: a #GdaDbCatalog object
  * @name: view name
  *
- * Convenient function to return a view based on name
+ * Convenient function to return a view based on name.
  *
- * Returns: table as #GdaDbView or %NULL
+ * Returns: table as #GdaDbView or %NULL if the view is not found.
  *
  */
 const GdaDbView*
@@ -561,10 +569,10 @@ gda_db_catalog_get_view (GdaDbCatalog *self,
   gda_db_base_set_names (iobj,catalog,schema,name);
 
   for (it = priv->mp_views; it; it = it->next)
-    if (!gda_db_base_compare (iobj,GDA_DB_BASE(it)))
+    if (!gda_db_base_compare (iobj, GDA_DB_BASE(it)))
       {
         g_object_unref (iobj);
-      return GDA_DB_VIEW(it);
+        return GDA_DB_VIEW(it);
       }
 
   g_object_unref (iobj);
@@ -579,7 +587,7 @@ gda_db_catalog_get_view (GdaDbCatalog *self,
  * object. If %NULL is passed this function works exactly as
  * gda_db_table_new()
  *
- * This method should not be part of the public API. 
+ * This method should not be part of the public API.
  *
  * Since: 6.0
  */
@@ -587,25 +595,25 @@ static GdaDbTable*
 _gda_db_table_new_from_meta (GdaMetaDbObject *obj)
 {
   if (!obj)
-    return gda_db_table_new();
+    return gda_db_table_new ();
 
   if (obj->obj_type != GDA_META_DB_TABLE)
     return NULL;
 
   GdaMetaTable *metatable = GDA_META_TABLE(obj);
-  GdaDbTable *table = gda_db_table_new();
+  GdaDbTable *table = gda_db_table_new ();
 
   gda_db_base_set_names(GDA_DB_BASE(table),
-                         obj->obj_catalog,
-                         obj->obj_schema,
-                         obj->obj_name);
+                        obj->obj_catalog,
+                        obj->obj_schema,
+                        obj->obj_name);
 
   GSList *it = NULL;
   for (it = metatable->columns; it; it = it->next)
     {
       GdaDbColumn *column = gda_db_column_new_from_meta (GDA_META_TABLE_COLUMN(it->data));
 
-      gda_db_table_append_column(table,column);
+      gda_db_table_append_column (table, column);
     }
 
   it = NULL;
@@ -616,7 +624,7 @@ _gda_db_table_new_from_meta (GdaMetaDbObject *obj)
 
       GdaDbFkey *fkey = gda_db_fkey_new_from_meta (GDA_META_TABLE_FOREIGN_KEY(it->data));
 
-      gda_db_table_append_fkey (table,fkey);
+      gda_db_table_append_fkey (table, fkey);
 
     }
 
@@ -629,17 +637,17 @@ _gda_db_table_new_from_meta (GdaMetaDbObject *obj)
  *
  * Create new #GdaDbView object from the corresponding #GdaMetaView object
  *
- * This method should not be part of the public API. 
+ * This method should not be part of the public API.
  *
- * Returns: New instance of #GdaDbView 
+ * Returns: New instance of #GdaDbView
  */
 static GdaDbView*
 _gda_db_view_new_from_meta (GdaMetaView *view)
 {
   if (!view)
-    return gda_db_view_new();
+    return gda_db_view_new ();
 
-  GdaDbView *dbview = gda_db_view_new();
+  GdaDbView *dbview = gda_db_view_new ();
 
   gda_db_view_set_defstring (dbview,view->view_def);
   gda_db_view_set_replace (dbview,view->is_updatable);
@@ -647,25 +655,28 @@ _gda_db_view_new_from_meta (GdaMetaView *view)
   return dbview;
 }
 
-/** 
+/**
  * gda_db_catalog_parse_cnc:
- * @self: a #GdaDbCatalog instance 
+ * @self: a #GdaDbCatalog instance
  * @error: error storage object
  *
- * Parse cnc to populate @self object. This method should be called every time after database was
- * modified or @self was just created.
+ * Parse internal cnc to populate @self object. This method should be called every time after
+ * database was modified or @self was just created using gda_connection_create_db_catalog(). The
+ * method will return %FALSE if no internal #GdaConnection available.
  *
  * Returns: Returns %TRUE if succeeded, %FALSE otherwise.
+ *
+ * Since: 6.0
  */
 gboolean
 gda_db_catalog_parse_cnc (GdaDbCatalog *self,
                           GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
 
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
 
-  if (!gda_connection_is_opened (priv->cnc))
+  if (!priv->cnc && !gda_connection_is_opened (priv->cnc))
     return FALSE;
 
   if(!gda_connection_update_meta_store (priv->cnc, NULL, error))
@@ -676,7 +687,9 @@ gda_db_catalog_parse_cnc (GdaDbCatalog *self,
   GdaMetaStruct *mstruct = NULL;
 
   mstore = gda_connection_get_meta_store (priv->cnc);
-  mstruct = (GdaMetaStruct*) g_object_new (GDA_TYPE_META_STRUCT, "meta-store", mstore, "features", 
GDA_META_STRUCT_FEATURE_ALL, NULL);
+  mstruct = (GdaMetaStruct*) g_object_new (GDA_TYPE_META_STRUCT,
+                                           "meta-store", mstore,
+                                           "features", GDA_META_STRUCT_FEATURE_ALL, NULL);
 
   GSList *dblist = NULL;
 
@@ -694,7 +707,7 @@ gda_db_catalog_parse_cnc (GdaDbCatalog *self,
     {
       if(GDA_META_DB_OBJECT(it->data)->obj_type == GDA_META_DB_TABLE)
         {
-          GdaDbTable *table = _gda_db_table_new_from_meta(it->data);
+          GdaDbTable *table = _gda_db_table_new_from_meta (it->data);
           if (!table)
             continue;
 
@@ -704,8 +717,8 @@ gda_db_catalog_parse_cnc (GdaDbCatalog *self,
 
       if(GDA_META_DB_OBJECT(it->data)->obj_type == GDA_META_DB_VIEW)
         {
-          GdaDbView *view = _gda_db_view_new_from_meta(it->data);
-          priv->mp_views = g_list_append (priv->mp_views,view);
+          GdaDbView *view = _gda_db_view_new_from_meta (it->data);
+          priv->mp_views = g_list_append (priv->mp_views, view);
           continue;
         }
     }
@@ -726,7 +739,8 @@ on_error:
  * @self: a #GdaDbCatalog instance
  * @table: table to append
  *
- * This method append @table to the total list of all tables stored in @self.
+ * This method append @table to the total list of all tables stored in @self. This method increase
+ * reference count for @table.
  *
  * Since: 6.0
  */
@@ -738,7 +752,7 @@ gda_db_catalog_append_table (GdaDbCatalog *self,
 
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
 
-  priv->mp_tables = g_list_append (priv->mp_tables,g_object_ref (table));
+  priv->mp_tables = g_list_append (priv->mp_tables, g_object_ref (table));
 }
 
 /**
@@ -746,7 +760,8 @@ gda_db_catalog_append_table (GdaDbCatalog *self,
  * @self: a #GdaDbCatalog instance
  * @view: view to append
  *
- * This method append @view to the total list of all views stored in @self.
+ * This method append @view to the total list of all views stored in @self. This method increase
+ * reference count for @view.
  *
  * Since: 6.0
  */
@@ -758,7 +773,7 @@ gda_db_catalog_append_view (GdaDbCatalog *self,
 
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
 
-  priv->mp_views = g_list_append (priv->mp_views,g_object_ref (view));
+  priv->mp_views = g_list_append (priv->mp_views, g_object_ref (view));
 }
 
 /**
@@ -771,20 +786,20 @@ gda_db_catalog_append_view (GdaDbCatalog *self,
  * method to work with database. For retrieving information from database to an
  * xml file use gda_db_catalog_parse_cnc() and gda_db_buildable_write_xml().
  *
- * Connection should be opened to use this method. See gda_connection_open()
- * method for reference.
+ * Connection can be added as a property using g_object_set() call and should be opened to use
+ * this method. See gda_connection_open() method for reference.
  *
  * Only table can be created. Views are ignored
  *
  * Each table from database compared with each table in the #GdaDbCatalog
- * instance. If the table doesn't exist in database, it will be created (CREATE_TABLE). 
+ * instance. If the table doesn't exist in database, it will be created (CREATE_TABLE).
  * If table exists in the database and xml file, all columns will be checked. If columns
  * are present in xml file but not in the database it will be created (ADD_COLUMN). If
  * column exists but has different parameters, e.g. nonnull it will not be
- * modified. 
+ * modified.
  *
- * Note: Pkeys are not checked. This is a limitation that should be removed. The corresponding 
- * issue was open on gitlab page. 
+ * Note: Pkeys are not checked. This is a limitation that should be removed. The corresponding
+ * issue was open on gitlab page.
  */
 gboolean
 gda_db_catalog_perform_operation (GdaDbCatalog *self,
@@ -810,7 +825,10 @@ gda_db_catalog_perform_operation (GdaDbCatalog *self,
     return FALSE;
 
   GdaMetaStore *mstore = gda_connection_get_meta_store (priv->cnc);
-  GdaMetaStruct *mstruct = (GdaMetaStruct*) g_object_new (GDA_TYPE_META_STRUCT, "meta-store", mstore, 
"features", GDA_META_STRUCT_FEATURE_ALL, NULL);
+  GdaMetaStruct *mstruct = (GdaMetaStruct*) g_object_new (GDA_TYPE_META_STRUCT,
+                                                          "meta-store", mstore,
+                                                          "features", GDA_META_STRUCT_FEATURE_ALL,
+                                                          NULL);
 
   // We need information about catalog, schema, name for each object we would
   // like to check
@@ -829,7 +847,7 @@ gda_db_catalog_perform_operation (GdaDbCatalog *self,
     {
       /* SQLite accepts only one possible value for schema: "main".
        * Other databases may also ignore schema and reference objects only by database and
-       * name, e.g. db_name.table_name 
+       * name, e.g. db_name.table_name
        * */
       g_value_set_string (catalog, gda_db_base_get_catalog(it->data));
       g_value_set_string (schema , gda_db_base_get_schema (it->data));
@@ -875,8 +893,8 @@ gda_db_catalog_perform_operation (GdaDbCatalog *self,
  * gda_db_catalog_write_to_file:
  * @self: a #GdaDbCatalog instance
  * @file: a #GFile to write database description
- * @error: container to hold error 
- * 
+ * @error: container to hold error
+ *
  * This method writes database description as xml file.
  * Similar to gda_db_catalog_write_to_path()
  *
@@ -889,11 +907,11 @@ gda_db_catalog_write_to_file (GdaDbCatalog *self,
                               GFile *file,
                               GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (file,FALSE);
-  
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (file, FALSE);
+
   gchar *filepath = g_file_get_path (file);
-  gboolean res = gda_db_catalog_write_to_path (self,filepath,error);
+  gboolean res = gda_db_catalog_write_to_path (self, filepath, error);
   g_free (filepath);
   return res;
 }
@@ -906,7 +924,7 @@ gda_db_catalog_write_to_file (GdaDbCatalog *self,
  *
  * Save content of @self to a user friendly xml file.
  *
- * Returns: %TRUE is no error, %FLASE otherwise. 
+ * Returns: %TRUE is no error, %FLASE otherwise.
  *
  * Since: 6.0
  */
@@ -917,7 +935,7 @@ gda_db_catalog_write_to_path (GdaDbCatalog *self,
 {
   g_return_val_if_fail (self,FALSE);
   g_return_val_if_fail (path,FALSE);
- 
+
   GdaDbCatalogPrivate *priv = gda_db_catalog_get_instance_private (self);
 
   xmlDocPtr doc = NULL;
@@ -925,17 +943,17 @@ gda_db_catalog_write_to_path (GdaDbCatalog *self,
 
   doc = xmlNewDoc (BAD_CAST "1.0");
   node_root = xmlNewNode (NULL, BAD_CAST "schema");
-  
+
   if (priv->mp_schemaname)
-    xmlNewProp (node_root,(xmlChar*)"name",(xmlChar*)priv->mp_schemaname);
+    xmlNewProp (node_root, (xmlChar*)"name",(xmlChar*)priv->mp_schemaname);
 
-  xmlDocSetRootElement (doc,node_root);
+  xmlDocSetRootElement (doc, node_root);
 
   GList *it = NULL;
-  
+
   for (it = priv->mp_tables; it; it=it->next)
     if (!gda_db_buildable_write_node (GDA_DB_BUILDABLE(GDA_DB_TABLE(it->data)),
-                                       node_root,error))
+                                       node_root, error))
       goto on_error;
 
   for (it = priv->mp_views; it; it=it->next)
@@ -943,15 +961,15 @@ gda_db_catalog_write_to_path (GdaDbCatalog *self,
                                        node_root,error))
       goto on_error;
 
-  xmlSaveFormatFileEnc (path,doc,"UTF-8",1);
+  xmlSaveFormatFileEnc (path, doc, "UTF-8", 1);
   xmlFreeDoc (doc);
-  xmlCleanupParser();
-  
+  xmlCleanupParser ();
+
   return TRUE;
 
 on_error:
   xmlFreeDoc (doc);
-  xmlCleanupParser();
+  xmlCleanupParser ();
   return FALSE;
 }
 
@@ -960,7 +978,7 @@ on_error:
  * @self: an instance of #GdaDbCatalog
  * @xmlfile: xml file as #GFile instance
  * @error: Error container
- * 
+ *
  * For detailed description see gda_db_catalog_parse_file_from_path()
  *
  * Since: 6.0
@@ -970,42 +988,44 @@ gda_db_catalog_parse_file (GdaDbCatalog *self,
                            GFile *xmlfile,
                            GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (xmlfile,FALSE);
-  g_return_val_if_fail (_gda_db_catalog_dtd,FALSE);
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (xmlfile, FALSE);
+  g_return_val_if_fail (_gda_db_catalog_dtd, FALSE);
 
   GFileInputStream *istream = NULL;
   xmlDocPtr doc = NULL;
 
-  istream = g_file_read (xmlfile,NULL,error);
+  istream = g_file_read (xmlfile, NULL, error);
 
   if(!istream)
     {
       g_set_error (error,
                    GDA_DB_CATALOG_ERROR,
                    GDA_DB_CATALOG_FILE_READ,
-                   _("Can't open stream for reading file '%s'"), g_file_get_basename(xmlfile));
+                   _("Can't open stream for reading file '%s'"), g_file_get_basename (xmlfile));
       return FALSE;
     }
 
   xmlParserCtxtPtr ctxt = NULL;
-  char buffer[10];
+  int buffer_size = 10;
+  char buffer[buffer_size];
   int ctxt_res = 0;
-  ctxt = xmlCreatePushParserCtxt (NULL,NULL,buffer,ctxt_res,NULL);
+  ctxt = xmlCreatePushParserCtxt (NULL, NULL, buffer, ctxt_res, NULL);
   if (!ctxt)
     {
       g_set_error (error,
                    GDA_DB_CATALOG_ERROR,
                    GDA_DB_CATALOG_FILE_READ,
-                   _("Can't create parse context for '%s'"), g_file_get_basename(xmlfile));
+                   _("Can't create parse context for '%s'"), g_file_get_basename (xmlfile));
       goto on_error;
     }
 
   int rescheck;
-  while ((ctxt_res = g_input_stream_read ((GInputStream*)istream,buffer,9,NULL,error)) > 0)
+  while ((ctxt_res = g_input_stream_read ((GInputStream*)istream, buffer, buffer_size-1,
+                                          NULL, error)) > 0)
     {
-      rescheck = xmlParseChunk(ctxt,buffer,ctxt_res,0); 
-   
+      rescheck = xmlParseChunk (ctxt, buffer, ctxt_res, 0);
+
       if (rescheck != 0)
         {
           g_set_error (error,
@@ -1017,7 +1037,7 @@ gda_db_catalog_parse_file (GdaDbCatalog *self,
         }
     }
 
-  xmlParseChunk (ctxt,buffer,0,1);
+  xmlParseChunk (ctxt, buffer, 0, 1);
 
   doc = ctxt->myDoc;
   ctxt_res = ctxt->wellFormed;
@@ -1040,7 +1060,7 @@ gda_db_catalog_parse_file (GdaDbCatalog *self,
       goto on_error;
     }
 
-  if (!_gda_db_catalog_validate_doc(doc, error))
+  if (!_gda_db_catalog_validate_doc (doc, error))
     {
       g_set_error (error,
                    GDA_DB_CATALOG_ERROR,
diff --git a/libgda/gda-db-catalog.h b/libgda/gda-db-catalog.h
index 8aedfb724..239777b6a 100644
--- a/libgda/gda-db-catalog.h
+++ b/libgda/gda-db-catalog.h
@@ -34,25 +34,26 @@ G_BEGIN_DECLS
 
 G_DECLARE_DERIVABLE_TYPE (GdaDbCatalog, gda_db_catalog, GDA, DB_CATALOG, GObject)
 
-struct _GdaDbCatalogClass {
+struct _GdaDbCatalogClass
+{
     GObjectClass parent;
 };
 
 /**
  * GdaDbCatalogError:
  * @GDA_DB_CATALOG_CONTEXT_NULL: Context is %NULL. Should not be %NULL for normal operation.
- * @GDA_DB_CATALOG_DOC_NULL: #xmlDocPtr is %NULL. 
+ * @GDA_DB_CATALOG_DOC_NULL: #xmlDocPtr is %NULL.
  * @GDA_DB_CATALOG_INVALID_XML: Sets if xml check fails. Xml file structure doesn't match with DTD
  * file
- * @GDA_DB_CATALOG_INVALID_SCHEMA: Sets if the used schema is invalid. 
- * @GDA_DB_CATALOG_SERVER_OPERATION: Sets if server operation is %NULL. 
+ * @GDA_DB_CATALOG_INVALID_SCHEMA: Sets if the used schema is invalid.
+ * @GDA_DB_CATALOG_SERVER_OPERATION: Sets if server operation is %NULL.
  * @GDA_DB_CATALOG_FILE_READ: Sets if xml file is not readable
  * @GDA_DB_CATALOG_PARSE_CONTEXT: Sets if an error with context during parsing an xml file
  * @GDA_DB_CATALOG_PARSE: Sets if parsing reports an error
  * @GDA_DB_CATALOG_PARSE_CHUNK: If set, error with parse chunk algorithm.
  * @GDA_DB_CATALOG_CONNECTION_CLOSED: Connection is not open.
  *
- * These error are primary for developers to troubleshoot the problem rather than for user. 
+ * These error are primary for developers to troubleshoot the problem rather than for user.
  */
 typedef  enum {
     GDA_DB_CATALOG_CONTEXT_NULL,
diff --git a/libgda/gda-db-column.c b/libgda/gda-db-column.c
index ca431c833..fd51968e7 100644
--- a/libgda/gda-db-column.c
+++ b/libgda/gda-db-column.c
@@ -1,6 +1,6 @@
 /* gda-db-column.c
  *
- * Copyright (C) 2018 Pavlo Solntsev <p sun fun gmail com>
+ * Copyright (C) 2018-2019 Pavlo Solntsev <p sun fun gmail com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -44,38 +44,38 @@ typedef struct
   gboolean m_autoinc; /* property */
   gboolean m_unique; /* property */
   gboolean m_pkey; /* property */
-}GdaDbColumnPrivate;
+} GdaDbColumnPrivate;
 
 /**
  * SECTION:gda-db-column
- * @short_description: Object to represent table column 
+ * @short_description: Object to represent table column
  * @see_also: #GdaDbTable, #GdaDbView, #GdaDbBuildable
  * @stability: Stable
  * @include: libgda/libgda.h
  *
  * This object represents a column of a table or a view. The column can be constracted manually
- * using API or generated from xml file together with other databse objects. See #GdaDbCreator.
+ * using API or generated from xml file together with other databse objects. See #GdaDbCatalog.
  * #GdaDbColumn implements #GdaDbBuildable interface for parsing xml file.
  */
 
 /* All nodes in xml should be accessed using enum below */
 enum {
-  GDA_DB_COLUMN_NODE,
-  GDA_DB_COLUMN_NAME,
-  GDA_DB_COLUMN_ATYPE,
-  GDA_DB_COLUMN_PKEY,
-  GDA_DB_COLUMN_UNIQUE,
-  GDA_DB_COLUMN_AUTOINC,
-  GDA_DB_COLUMN_NNUL,
-  GDA_DB_COLUMN_COMMENT,
-  GDA_DB_COLUMN_SIZE,
-  GDA_DB_COLUMN_CHECK,
-  GDA_DB_COLUMN_VALUE,
-  GDA_DB_COLUMN_SCALE,
-  GDA_DB_COLUMN_N_NODES
+    GDA_DB_COLUMN_NODE,
+    GDA_DB_COLUMN_NAME,
+    GDA_DB_COLUMN_ATYPE,
+    GDA_DB_COLUMN_PKEY,
+    GDA_DB_COLUMN_UNIQUE,
+    GDA_DB_COLUMN_AUTOINC,
+    GDA_DB_COLUMN_NNUL,
+    GDA_DB_COLUMN_COMMENT,
+    GDA_DB_COLUMN_SIZE,
+    GDA_DB_COLUMN_CHECK,
+    GDA_DB_COLUMN_VALUE,
+    GDA_DB_COLUMN_SCALE,
+    GDA_DB_COLUMN_N_NODES
 };
 
-const gchar *gdadbcolumnnode[GDA_DB_COLUMN_N_NODES] = {
+static const gchar *gdadbcolumnnode[GDA_DB_COLUMN_N_NODES] = {
   "column",
   "name",
   "type",
@@ -114,9 +114,7 @@ enum {
 };
 
 static void
-_gda_db_column_set_type (GdaDbColumn *self,
-                         const gchar *type,
-                         GError **error);
+_gda_db_column_set_type (GdaDbColumn *self, const gchar *type, GError **error);
 
 static GParamSpec *properties [N_PROPS] = {NULL};
 
@@ -159,34 +157,34 @@ gda_db_column_get_property (GObject    *object,
 
   switch (prop_id) {
     case PROP_COLUMN_NAME:
-      g_value_set_string (value,priv->mp_name);
+      g_value_set_string (value, priv->mp_name);
       break;
     case PROP_COLUMN_SIZE:
-      g_value_set_uint (value,priv->m_size);
+      g_value_set_uint (value, priv->m_size);
       break;
     case PROP_COLUMN_NNUL:
-      g_value_set_boolean (value,priv->m_nnul);
+      g_value_set_boolean (value, priv->m_nnul);
       break;
     case PROP_COLUMN_UNIQUE:
-      g_value_set_boolean (value,priv->m_unique);
+      g_value_set_boolean (value, priv->m_unique);
       break;
     case PROP_COLUMN_PKEY:
-      g_value_set_boolean (value,priv->m_pkey);
+      g_value_set_boolean (value, priv->m_pkey);
       break;
     case PROP_COLUMN_AUTOINC:
-      g_value_set_boolean (value,priv->m_autoinc);
+      g_value_set_boolean (value, priv->m_autoinc);
       break;
     case PROP_COLUMN_DEFAULT:
-      g_value_set_string (value,priv->mp_default);
+      g_value_set_string (value, priv->mp_default);
       break;
     case PROP_COLUMN_CHECK:
-      g_value_set_string (value,priv->mp_check);
+      g_value_set_string (value, priv->mp_check);
       break;
     case PROP_COLUMN_COMMENT:
-      g_value_set_string (value,priv->mp_comment);
+      g_value_set_string (value, priv->mp_comment);
       break;
     case PROP_COLUMN_SCALE:
-      g_value_set_uint (value,priv->m_scale);
+      g_value_set_uint (value, priv->m_scale);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -254,35 +252,35 @@ gda_db_column_class_init (GdaDbColumnClass *klass)
   object_class->set_property = gda_db_column_set_property;
 
   properties[PROP_COLUMN_NAME] =
-    g_param_spec_string ("name","Name","Column name",NULL,G_PARAM_READWRITE);
+    g_param_spec_string ("name", "Name", "Column name", NULL, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_SIZE] =
-    g_param_spec_uint ("size","Size","Column size",0,9999,80,G_PARAM_READWRITE);
+    g_param_spec_uint ("size", "Size", "Column size", 0, 9999, 80, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_NNUL] =
-    g_param_spec_boolean ("nnul","NotNULL","Can value be NULL",TRUE,G_PARAM_READWRITE); 
+    g_param_spec_boolean ("nnul", "NotNULL", "Can value be NULL", TRUE, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_AUTOINC] =
-    g_param_spec_boolean ("autoinc","Autoinc","Can value be autoincremented",FALSE,
+    g_param_spec_boolean ("autoinc", "Autoinc", "Can value be autoincremented", FALSE,
                           G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_UNIQUE] =
-    g_param_spec_boolean ("unique","Unique","Can value be unique",FALSE,G_PARAM_READWRITE);
+    g_param_spec_boolean ("unique", "Unique", "Can value be unique", FALSE, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_PKEY] =
-    g_param_spec_boolean ("pkey","Pkey","Is is primery key",FALSE,G_PARAM_READWRITE);
+    g_param_spec_boolean ("pkey", "Pkey", "Is is primery key", FALSE, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_DEFAULT] =
-    g_param_spec_string ("default","Default","Default value",NULL,G_PARAM_READWRITE);
+    g_param_spec_string ("default", "Default", "Default value", NULL,G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_CHECK] =
-    g_param_spec_string ("check","Check","Column check string",NULL,G_PARAM_READWRITE);
+    g_param_spec_string ("check", "Check", "Column check string", NULL, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_COMMENT] =
-    g_param_spec_string ("comment","Comment","Column comment",NULL,G_PARAM_READWRITE);
+    g_param_spec_string ("comment", "Comment", "Column comment", NULL, G_PARAM_READWRITE);
 
   properties[PROP_COLUMN_SCALE] =
-    g_param_spec_uint ("scale","Scale","Number of decimal for numeric type",0,64,2,
+    g_param_spec_uint ("scale", "Scale", "Number of decimal for numeric type", 0, 64, 2,
                          G_PARAM_READWRITE);
   g_object_class_install_properties (object_class, N_PROPS, properties);
 }
@@ -325,55 +323,63 @@ gda_db_column_parse_node (GdaDbBuildable *buildable,
   g_return_val_if_fail (buildable,FALSE);
   g_return_val_if_fail (node,FALSE);
 
-  /*TODO: Appropriate error should be set an returned. 
-   * It should be added to the header file first 
+  /*TODO: Appropriate error should be set an returned.
+   * It should be added to the header file first
    */
-  if (g_strcmp0 ((gchar *)node->name,gdadbcolumnnode[GDA_DB_COLUMN_NODE]))
+  if (g_strcmp0 ((gchar *)node->name, gdadbcolumnnode[GDA_DB_COLUMN_NODE]))
     return FALSE;
 
   GdaDbColumn *self = GDA_DB_COLUMN (buildable);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
-  xmlChar *name = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_NAME]);
+  xmlChar *name = xmlGetProp (node, (xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_NAME]);
   g_assert (name); /* If here bug with xml validation */
   g_object_set (G_OBJECT(self),"name",(gchar*)name,NULL);
   xmlFree (name);
 
   xmlChar *type = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_ATYPE]);
   g_assert (type); /* If here buf with validation */
-  _gda_db_column_set_type (self,(const gchar *)type,error);
+  _gda_db_column_set_type (self, (const gchar *)type,error);
   xmlFree (type);
 
   xmlChar *cprop = NULL;
   cprop = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_PKEY]);
   if (cprop)
     {
-      g_object_set (G_OBJECT(self),"pkey",*cprop == 't' || *cprop == 'T' ? TRUE : FALSE, NULL);
+      g_object_set (G_OBJECT(self),
+                    "pkey", *cprop == 't' || *cprop == 'T' ? TRUE : FALSE,
+                    NULL);
       xmlFree (cprop);
     }
 
   /* We need scale only for NUMBERIC data type, e.g. float, double  */
-  cprop = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_UNIQUE]);
+  cprop = xmlGetProp (node, (xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_UNIQUE]);
 
   if (cprop)
     {
-      g_object_set (G_OBJECT(self),"unique",*cprop == 't' || *cprop == 'T' ? TRUE : FALSE,NULL); 
+      g_object_set (G_OBJECT(self),
+                    "unique", *cprop == 't' || *cprop == 'T' ? TRUE : FALSE,
+                    NULL);
       xmlFree (cprop);
     }
 
-  cprop = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_AUTOINC]);
+  cprop = xmlGetProp (node, (xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_AUTOINC]);
 
   if (cprop)
     {
-      g_object_set (G_OBJECT(self),"autoinc",*cprop == 't' || *cprop == 'T' ? TRUE : FALSE,NULL);
+      g_object_set (G_OBJECT(self),
+                    "autoinc", *cprop == 't' || *cprop == 'T' ? TRUE : FALSE,
+                    NULL);
       xmlFree (cprop);
     }
 
-  cprop = xmlGetProp (node,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_NNUL]);
+  cprop = xmlGetProp (node, (xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_NNUL]);
 
   if (cprop)
     {
-      g_object_set (G_OBJECT(self),"nnul",*cprop == 't' || *cprop == 'T' ? TRUE : FALSE,NULL);
+      g_object_set (G_OBJECT(self),
+                    "nnul",*cprop == 't' || *cprop == 'T' ? TRUE : FALSE,
+                    NULL);
       xmlFree (cprop);
     }
 
@@ -385,44 +391,44 @@ gda_db_column_parse_node (GdaDbBuildable *buildable,
 
           if (value)
             {
-              g_object_set (G_OBJECT (self),"default",(gchar *)value,NULL);
+              g_object_set (G_OBJECT (self), "default", (gchar *)value, NULL);
               xmlFree (value);
             }
 
-          xmlChar *nprop = xmlGetProp (it,BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_SIZE]); 
+          xmlChar *nprop = xmlGetProp (it, BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_SIZE]);
           guint64 tint = 0;
           if (nprop)
             {
-              tint = g_ascii_strtoull ((gchar*)nprop,NULL,10);
+              tint = g_ascii_strtoull ((gchar*)nprop, NULL, 10);
               xmlFree (nprop);
-              g_object_set (G_OBJECT (self),"size",tint,NULL);
+              g_object_set (G_OBJECT (self), "size", tint, NULL);
             }
-    
+
           if (priv->m_gtype == G_TYPE_FLOAT ||
               priv->m_gtype == G_TYPE_DOUBLE ||
               priv->m_gtype == GDA_TYPE_NUMERIC)
             {
-              nprop = xmlGetProp (it,(xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_SCALE]);
+              nprop = xmlGetProp (it, (xmlChar *)gdadbcolumnnode[GDA_DB_COLUMN_SCALE]);
               if (nprop)
                 {
-                  guint64 tint = g_ascii_strtoull ((gchar*)nprop,NULL,10);
-                  g_object_set (G_OBJECT(self),"scale",tint,NULL);
+                  guint64 tint = g_ascii_strtoull ((gchar*)nprop, NULL, 10);
+                  g_object_set (G_OBJECT(self), "scale", tint, NULL);
                   xmlFree (nprop);
                 }
             }
         }
 
-      if (!g_strcmp0 ((char *)it->name,gdadbcolumnnode[GDA_DB_COLUMN_CHECK]))
+      if (!g_strcmp0 ((char *)it->name, gdadbcolumnnode[GDA_DB_COLUMN_CHECK]))
         {
           xmlChar *check = xmlNodeGetContent (it);
-          g_object_set (G_OBJECT (self),"check",check,NULL);
+          g_object_set (G_OBJECT (self), "check", check,NULL);
           xmlFree (check);
         }
 
-      if (!g_strcmp0 ((char *)it->name,gdadbcolumnnode[GDA_DB_COLUMN_COMMENT]))
+      if (!g_strcmp0 ((char *)it->name, gdadbcolumnnode[GDA_DB_COLUMN_COMMENT]))
         {
           xmlChar *comment = xmlNodeGetContent (it);
-          g_object_set (G_OBJECT (self),"comment",comment,NULL);
+          g_object_set (G_OBJECT (self), "comment", comment,NULL);
           xmlFree (comment);
         }
     } /* End of for loop */
@@ -434,8 +440,8 @@ gda_db_column_write_node (GdaDbBuildable *buildable,
                           xmlNodePtr rootnode,
                           GError       **error)
 {
-  g_return_val_if_fail (buildable,FALSE);
-  g_return_val_if_fail (rootnode,FALSE);
+  g_return_val_if_fail (buildable, FALSE);
+  g_return_val_if_fail (rootnode, FALSE);
 
   GdaDbColumn *self = GDA_DB_COLUMN (buildable);
 
@@ -472,47 +478,47 @@ gda_db_column_write_node (GdaDbBuildable *buildable,
               BAD_CAST GDA_BOOL_TO_STR(priv->m_nnul));
 
   if (priv->mp_comment)
-    xmlNewChild (node,NULL,
+    xmlNewChild (node, NULL,
                  BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_COMMENT],
                  BAD_CAST priv->mp_comment);
-    
+
   xmlNodePtr nodevalue = NULL;
- 
+
   if (priv->mp_default)
     {
       nodevalue = xmlNewChild (node,
                                NULL,
                                BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_VALUE],
                                BAD_CAST priv->mp_default);
-    
+
       if (priv->m_size > 0)
         {
           /* temp string to convert gint to gchar* */
           GString *sizestr = g_string_new (NULL);
-          g_string_printf (sizestr,"%d",priv->m_size);
-        
+          g_string_printf (sizestr, "%d", priv->m_size);
+
           xmlNewProp (nodevalue,
                       BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_SIZE],
                       BAD_CAST sizestr->str);
-        
+
           g_string_free (sizestr,TRUE);
-        
+
           /* We need to write down scale if column type is numeric */
           if (priv->m_gtype == G_TYPE_FLOAT ||
               priv->m_gtype == G_TYPE_DOUBLE ||
               priv->m_gtype == GDA_TYPE_NUMERIC)
             {
               GString *scale_str = g_string_new (NULL);
-              g_string_printf (scale_str,"%d",priv->m_scale);
-            
+              g_string_printf (scale_str, "%d", priv->m_scale);
+
               xmlNewProp (nodevalue,
                           BAD_CAST gdadbcolumnnode[GDA_DB_COLUMN_SCALE],
                           BAD_CAST scale_str->str);
-            
-              g_string_free (scale_str,TRUE);
+
+              g_string_free (scale_str, TRUE);
             }
         }
-    } 
+    }
 
   if (priv->mp_check)
     xmlNewChild (node,NULL,
@@ -556,7 +562,7 @@ _gda_db_column_set_type (GdaDbColumn *self,
  * gda_db_column_get_name:
  * @self: a #GdaDbColumn instance
  *
- * Returns name of the column 
+ * Returns name of the column
  *
  * Returns: Column name as a string or %NULL.
  *
@@ -565,7 +571,7 @@ _gda_db_column_set_type (GdaDbColumn *self,
 const gchar*
 gda_db_column_get_name (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
   return priv->mp_name;
@@ -584,6 +590,7 @@ void
 gda_db_column_set_name (GdaDbColumn *self,
                         const gchar *name)
 {
+  g_return_val_if_fail (self, NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
   g_free (priv->mp_name);
@@ -601,7 +608,7 @@ gda_db_column_set_name (GdaDbColumn *self,
 GType
 gda_db_column_get_gtype (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,GDA_TYPE_NULL);
+  g_return_val_if_fail (self, GDA_TYPE_NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
   return priv->m_gtype;
@@ -610,8 +617,8 @@ gda_db_column_get_gtype (GdaDbColumn *self)
 /**
  * gda_db_column_get_ctype:
  * @self: a #GdaDbColumn object
- * 
- * Returns column type as a string derivied from #GType 
+ *
+ * Returns column type as a string derivied from #GType
  *
  * Returns: column type as a string or %NULL
  *
@@ -620,7 +627,7 @@ gda_db_column_get_gtype (GdaDbColumn *self)
 const gchar*
 gda_db_column_get_ctype (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->mp_type;
 }
@@ -695,7 +702,7 @@ gda_db_column_set_scale (GdaDbColumn *self,
 gboolean
 gda_db_column_get_pkey (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->m_pkey;
 }
@@ -720,16 +727,16 @@ gda_db_column_set_pkey (GdaDbColumn *self,
  * gda_db_column_get_nnul:
  * @self: a @GdaDbColumn object
  *
- * Specify if the column's value can be NULL. 
+ * Specify if the column's value can be NULL.
  *
- * Returns: %TRUE if value can be %NULL, %FALSE otherwise. 
+ * Returns: %TRUE if value can be %NULL, %FALSE otherwise.
  *
  * Since: 6.0
  */
 gboolean
 gda_db_column_get_nnul (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->m_nnul;
 }
@@ -755,7 +762,7 @@ gda_db_column_set_nnul (GdaDbColumn *self,
  * @self: a #GdaDbColumn object
  *
  * Get value for autoinc key
- * 
+ *
  * Returns: %TRUE if column should be auto-incremented, %FALSE otherwise.
  *
  * Since: 6.0
@@ -763,7 +770,7 @@ gda_db_column_set_nnul (GdaDbColumn *self,
 gboolean
 gda_db_column_get_autoinc (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->m_autoinc;
 }
@@ -771,7 +778,7 @@ gda_db_column_get_autoinc (GdaDbColumn *self)
 /**
  * gda_db_column_set_autoinc:
  * @self: a #GdaDbColumn object
- * @autoinc: value to set 
+ * @autoinc: value to set
  *
  * Set value for auto-incremented key.
  *
@@ -791,7 +798,7 @@ gda_db_column_set_autoinc (GdaDbColumn *self,
  * @self: a #GdaDbColumn object
  *
  * Get value for unique key
- * 
+ *
  * Returns: %TRUE if column should have a unique value, %FALSE otherwise.
  *
  * Since: 6.0
@@ -799,7 +806,7 @@ gda_db_column_set_autoinc (GdaDbColumn *self,
 gboolean
 gda_db_column_get_unique (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->m_unique;
 }
@@ -807,7 +814,7 @@ gda_db_column_get_unique (GdaDbColumn *self)
 /**
  * gda_db_column_set_unique:
  * @self: a #GdaDbColumn object
- * @unique: value to set 
+ * @unique: value to set
  *
  * Set value for unique key.
  *
@@ -826,9 +833,9 @@ gda_db_column_set_unique (GdaDbColumn *self,
  * gda_db_column_get_comment:
  * @self: a #GdaDbColumn object
  *
- * Get value for column comment. 
- * 
- * Returns: Column comment as a string. 
+ * Get value for column comment.
+ *
+ * Returns: Column comment as a string.
  * %NULL is returned if comment is not set.
  *
  * Since: 6.0
@@ -836,7 +843,7 @@ gda_db_column_set_unique (GdaDbColumn *self,
 const gchar*
 gda_db_column_get_comment (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
   return priv->mp_comment;
@@ -847,8 +854,8 @@ gda_db_column_get_comment (GdaDbColumn *self)
  * @self: a #GdaDbColumn object
  * @comnt: comment to set
  *
- * Set value for column comment. 
- * 
+ * Set value for column comment.
+ *
  * Since: 6.0
  */
 void
@@ -865,14 +872,14 @@ gda_db_column_set_comment (GdaDbColumn *self,
  * gda_db_column_get_size:
  * @self: a #GdaDbColumn instance
  *
- * Returns: Current value for column size. 
+ * Returns: Current value for column size.
  *
  * Since: 6.0
  */
 guint
 gda_db_column_get_size (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,0);
+  g_return_val_if_fail (self, 0);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->m_size;
 }
@@ -898,7 +905,7 @@ gda_db_column_set_size (GdaDbColumn *self,
 /**
  * gda_db_column_get_default:
  * @self: a #GdaDbColumn instance
- * 
+ *
  * Returns default value for the column. Can be %NULL if the default value hasn't been set.
  *
  * Returns: Default value for the column as a string.
@@ -908,7 +915,7 @@ gda_db_column_set_size (GdaDbColumn *self,
 const gchar*
 gda_db_column_get_default (GdaDbColumn *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   return priv->mp_default;
 }
@@ -927,13 +934,13 @@ gda_db_column_set_default (GdaDbColumn *self,
   g_return_if_fail (self);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   g_free(priv->mp_default);
-  priv->mp_default = g_strdup(value);
+  priv->mp_default = g_strdup (value);
 }
 
 /**
  * gda_db_column_get_check:
  * @self: a #GdaDbColumn instance
- * 
+ *
  * Returns value of the check field.
  *
  * Returns: Column check string
@@ -964,7 +971,7 @@ gda_db_column_set_check (GdaDbColumn *self,
   g_return_if_fail (self);
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
   g_free(priv->mp_check);
-  priv->mp_check = g_strdup(value);
+  priv->mp_check = g_strdup (value);
 }
 
 /**
@@ -995,14 +1002,19 @@ gda_db_column_prepare_create  (GdaDbColumn *self,
 
   if(!gda_server_operation_set_value_at (op, priv->mp_name, error, "/FIELDS_A/@COLUMN_NAME/%d", order))
     return FALSE;
+
   cnc = (GdaConnection*) g_object_get_data (G_OBJECT (op), "connection");
-  if (cnc == NULL) {
-    g_set_error (error, GDA_DB_COLUMN_ERROR, GDA_DB_COLUMN_ERROR_TYPE,
-                 _("Internal error: Operation should be prepared, setting a connection data"));
-    return FALSE;
-  }
+
+  if (cnc == NULL) 
+    {
+      g_set_error (error, GDA_DB_COLUMN_ERROR, GDA_DB_COLUMN_ERROR_TYPE,
+                   _("Internal error: Operation should be prepared, setting a connection data"));
+      return FALSE;
+    }
+
   strtype = gda_server_provider_get_default_dbms_type (gda_connection_get_provider (cnc),
                                                        cnc, priv->m_gtype);
+
   if(!gda_server_operation_set_value_at (op, strtype, error, "/FIELDS_A/@COLUMN_TYPE/%d", order))
     return FALSE;
 
@@ -1026,11 +1038,11 @@ gda_db_column_prepare_create  (GdaDbColumn *self,
 /* We need to set scale only for numeric column type */
   if (priv->m_gtype == G_TYPE_FLOAT ||
       priv->m_gtype == G_TYPE_DOUBLE ||
-      priv->m_gtype == GDA_TYPE_NUMERIC) 
+      priv->m_gtype == GDA_TYPE_NUMERIC)
     {
-      numstr = g_strdup_printf ("%d",priv->m_scale);
-    
-      if(!gda_server_operation_set_value_at(op,numstr,error,"/FIELDS_A/@COLUMN_SCALE/%d",order))
+      numstr = g_strdup_printf ("%d", priv->m_scale);
+
+      if(!gda_server_operation_set_value_at (op, numstr, error, "/FIELDS_A/@COLUMN_SCALE/%d", order))
         {
           g_free (numstr);
           return FALSE;
@@ -1058,11 +1070,11 @@ gda_db_column_prepare_create  (GdaDbColumn *self,
                                         "/FIELDS_A/@COLUMN_PKEY/%d",order))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at (op,priv->mp_default, error,
+  if(!gda_server_operation_set_value_at (op, priv->mp_default, error,
                                         "/FIELDS_A/@COLUMN_DEFAULT/%d", order))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at (op,priv->mp_check,error,
+  if(!gda_server_operation_set_value_at (op, priv->mp_check,error,
                                         "/FIELDS_A/@COLUMN_CHECK/%d", order))
     return FALSE;
 
@@ -1087,19 +1099,19 @@ gda_db_column_prepare_add (GdaDbColumn *self,
 {
   GdaDbColumnPrivate *priv = gda_db_column_get_instance_private (self);
 
-  if(!gda_server_operation_set_value_at(op,priv->mp_name,error,
-                                        "/COLUMN_DEF_P/COLUMN_NAME/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, priv->mp_name, error,
+                                        "/COLUMN_DEF_P/COLUMN_NAME/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,priv->mp_type,error,
-                                        "/COLUMN_DEF_P/COLUMN_TYPE/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op,priv->mp_type, error,
+                                        "/COLUMN_DEF_P/COLUMN_TYPE/%d", priv->m_scale))
     return FALSE;
 
   gchar *sizestr = NULL;
-  sizestr = g_strdup_printf ("%d",priv->m_size);
+  sizestr = g_strdup_printf ("%d", priv->m_size);
 
-  if(!gda_server_operation_set_value_at(op,sizestr,error,
-                                        "/COLUMN_DEF_P/COLUMN_SIZE/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, sizestr, error,
+                                        "/COLUMN_DEF_P/COLUMN_SIZE/%d", priv->m_scale))
     {
       g_free (sizestr);
       return FALSE;
@@ -1107,28 +1119,28 @@ gda_db_column_prepare_add (GdaDbColumn *self,
   else
     g_free (sizestr);
 
-  if(!gda_server_operation_set_value_at(op,GDA_BOOL_TO_STR (priv->m_nnul),error,
-                                        "/COLUMN_DEF_P/COLUMN_NNUL/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, GDA_BOOL_TO_STR (priv->m_nnul), error,
+                                        "/COLUMN_DEF_P/COLUMN_NNUL/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,GDA_BOOL_TO_STR (priv->m_autoinc),error,
-                                        "/COLUMN_DEF_P/COLUMN_AUTOINC/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, GDA_BOOL_TO_STR (priv->m_autoinc), error,
+                                        "/COLUMN_DEF_P/COLUMN_AUTOINC/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,GDA_BOOL_TO_STR (priv->m_unique),error,
-                                        "/COLUMN_DEF_P/COLUMN_UNIQUE/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, GDA_BOOL_TO_STR (priv->m_unique), error,
+                                        "/COLUMN_DEF_P/COLUMN_UNIQUE/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,GDA_BOOL_TO_STR (priv->m_pkey),error,
-                                        "/COLUMN_DEF_P/COLUMN_PKEY/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, GDA_BOOL_TO_STR (priv->m_pkey), error,
+                                        "/COLUMN_DEF_P/COLUMN_PKEY/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,priv->mp_default,error,
-                                        "/COLUMN_DEF_P/COLUMN_DEFAULT/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, priv->mp_default, error,
+                                        "/COLUMN_DEF_P/COLUMN_DEFAULT/%d", priv->m_scale))
     return FALSE;
 
-  if(!gda_server_operation_set_value_at(op,priv->mp_check,error,
-                                        "/COLUMN_DEF_P/COLUMN_CHECK/%d",priv->m_scale))
+  if(!gda_server_operation_set_value_at (op, priv->mp_check, error,
+                                        "/COLUMN_DEF_P/COLUMN_CHECK/%d", priv->m_scale))
     return FALSE;
 
   return TRUE;
@@ -1148,15 +1160,15 @@ GdaDbColumn*
 gda_db_column_new_from_meta (GdaMetaTableColumn *column)
 {
   if (!column)
-    return gda_db_column_new();
+    return gda_db_column_new ();
 
-  GdaDbColumn *gdacolumn = gda_db_column_new();
+  GdaDbColumn *gdacolumn = gda_db_column_new ();
 
   g_object_set (gdacolumn,
-                "name",column->column_name,
-                "pkey",column->pkey,
-                "nnul",column->nullok,
-                "default",column->default_value,
+                "name", column->column_name,
+                "pkey", column->pkey,
+                "nnul", column->nullok,
+                "default", column->default_value,
                 NULL);
 
   gda_db_column_set_type (gdacolumn, column->gtype);
diff --git a/libgda/gda-db-column.h b/libgda/gda-db-column.h
index 371a0b45e..56482c8a5 100644
--- a/libgda/gda-db-column.h
+++ b/libgda/gda-db-column.h
@@ -42,9 +42,10 @@ struct _GdaDbColumnClass
  * GdaDbColumnError:
  * @GDA_DB_COLUMN_ERROR_TYPE: Set if wrong column type was given in the xml file.
  *
- * Values used to describe the source of the error. 
+ * Values used to describe the source of the error.
  */
-typedef  enum {
+typedef  enum 
+{
   GDA_DB_COLUMN_ERROR_TYPE
 } GdaDbColumnError;
 
diff --git a/libgda/gda-db-fkey.c b/libgda/gda-db-fkey.c
index 52e8abfb3..8dd5a1f07 100644
--- a/libgda/gda-db-fkey.c
+++ b/libgda/gda-db-fkey.c
@@ -1,6 +1,6 @@
 /* gda-db-fkey.c
  *
- * Copyright (C) 2018 Pavlo Solntsev <p sun fun gmail com>
+ * Copyright (C) 2018-2019 Pavlo Solntsev <p sun fun gmail com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -66,24 +66,24 @@ static const gchar *OnAction[] = {
 
 /* This is convenient way to name all nodes from xml file */
 enum {
-  GDA_DB_FKEY_NODE,
-  GDA_DB_FKEY_REFTABLE,
-  GDA_DB_FKEY_ONUPDATE,
-  GDA_DB_FKEY_ONDELETE,
-  GDA_DB_FKEY_FKFIELD,
-  GDA_DB_FKEY_FKFIELD_NAME,
-  GDA_DB_FKEY_FKFIELD_REFIELD,
-  GDA_DB_FKEY_N_NODES
+    GDA_DB_FKEY_NODE,
+    GDA_DB_FKEY_REFTABLE,
+    GDA_DB_FKEY_ONUPDATE,
+    GDA_DB_FKEY_ONDELETE,
+    GDA_DB_FKEY_FKFIELD,
+    GDA_DB_FKEY_FKFIELD_NAME,
+    GDA_DB_FKEY_FKFIELD_REFIELD,
+    GDA_DB_FKEY_N_NODES
 };
 
-const gchar *gdadbfkeynodes[GDA_DB_FKEY_N_NODES] = {
-  "fkey",
-  "reftable",
-  "onupdate",
-  "ondelete",
-  "fk_field",
-  "name",
-  "reffield"
+static const gchar *gdadbfkeynodes[GDA_DB_FKEY_N_NODES] = {
+    "fkey",
+    "reftable",
+    "onupdate",
+    "ondelete",
+    "fk_field",
+    "name",
+    "reffield"
 };
 
 /**
@@ -102,8 +102,8 @@ gda_db_fkey_new (void)
 /**
  * gda_db_fkey_new_from_meta:
  * @metafkey: a #GdaMetaTableForeignKey instance
- * 
- * Create a new instance from the corresponding meta object. If @metafkey is %NULL, 
+ *
+ * Create a new instance from the corresponding meta object. If @metafkey is %NULL,
  * this function is identical to gda_db_fkey_new()
  *
  */
@@ -111,13 +111,13 @@ GdaDbFkey*
 gda_db_fkey_new_from_meta (GdaMetaTableForeignKey *metafkey)
 {
   if (!metafkey)
-    return gda_db_fkey_new();
+    return gda_db_fkey_new ();
 
   GdaMetaDbObject *refobject = GDA_META_DB_OBJECT (metafkey->meta_table);
 
   GdaDbFkey *fkey = gda_db_fkey_new ();
-  
-  gda_db_fkey_set_ref_table (fkey,refobject->obj_full_name);
+
+  gda_db_fkey_set_ref_table (fkey, refobject->obj_full_name);
 
   for (gint i = 0; i < metafkey->cols_nb; i++)
       gda_db_fkey_set_field (fkey,
@@ -129,35 +129,35 @@ gda_db_fkey_new_from_meta (GdaMetaTableForeignKey *metafkey)
   switch (policy)
     {
     case GDA_META_FOREIGN_KEY_NONE:
-      gda_db_fkey_set_onupdate (fkey,GDA_DB_FKEY_NO_ACTION);
+      gda_db_fkey_set_onupdate (fkey, GDA_DB_FKEY_NO_ACTION);
       break;
     case GDA_META_FOREIGN_KEY_CASCADE:
-      gda_db_fkey_set_onupdate (fkey,GDA_DB_FKEY_CASCADE);
+      gda_db_fkey_set_onupdate (fkey, GDA_DB_FKEY_CASCADE);
       break;
     case GDA_META_FOREIGN_KEY_RESTRICT:
-      gda_db_fkey_set_onupdate (fkey,GDA_DB_FKEY_RESTRICT);
+      gda_db_fkey_set_onupdate (fkey, GDA_DB_FKEY_RESTRICT);
       break;
     case GDA_META_FOREIGN_KEY_SET_DEFAULT:
-      gda_db_fkey_set_onupdate (fkey,GDA_DB_FKEY_SET_DEFAULT);
+      gda_db_fkey_set_onupdate (fkey, GDA_DB_FKEY_SET_DEFAULT);
       break;
     default:
       break;
     }
-  
+
   policy = GDA_META_TABLE_FOREIGN_KEY_ON_DELETE_POLICY(metafkey);
   switch (policy)
     {
     case GDA_META_FOREIGN_KEY_NONE:
-      gda_db_fkey_set_ondelete (fkey,GDA_DB_FKEY_NO_ACTION);
+      gda_db_fkey_set_ondelete (fkey, GDA_DB_FKEY_NO_ACTION);
       break;
     case GDA_META_FOREIGN_KEY_CASCADE:
-      gda_db_fkey_set_ondelete (fkey,GDA_DB_FKEY_CASCADE);
+      gda_db_fkey_set_ondelete (fkey, GDA_DB_FKEY_CASCADE);
       break;
     case GDA_META_FOREIGN_KEY_RESTRICT:
-      gda_db_fkey_set_ondelete (fkey,GDA_DB_FKEY_RESTRICT);
+      gda_db_fkey_set_ondelete (fkey, GDA_DB_FKEY_RESTRICT);
       break;
     case GDA_META_FOREIGN_KEY_SET_DEFAULT:
-      gda_db_fkey_set_ondelete (fkey,GDA_DB_FKEY_SET_DEFAULT);
+      gda_db_fkey_set_ondelete (fkey, GDA_DB_FKEY_SET_DEFAULT);
       break;
     default:
       break;
@@ -175,7 +175,7 @@ gda_db_fkey_finalize (GObject *object)
   if (priv->mp_field)     g_list_free_full (priv->mp_field,     g_free);
   if (priv->mp_ref_field) g_list_free_full (priv->mp_ref_field, g_free);
 
-  g_free(priv->mp_ref_table);
+  g_free (priv->mp_ref_table);
 
   G_OBJECT_CLASS (gda_db_fkey_parent_class)->finalize (object);
 }
@@ -208,7 +208,7 @@ gda_db_fkey_init (GdaDbFkey *self)
  * @error: #GError object to store error
  *
  * Use this method to populate corresponding #GdaDbFkey object from xml node. Usually,
- * this method is called from #GdaDbCreator during parsing the input xml file.
+ * this method is called from #GdaDbCatalog during parsing the input xml file.
  *
  * The corresponding DTD section suitable for parsing by this method should correspond
  * th the following code:
@@ -230,12 +230,12 @@ gda_db_fkey_init (GdaDbFkey *self)
  */
 static gboolean
 gda_db_fkey_parse_node (GdaDbBuildable *buildable,
-                         xmlNodePtr       node,
-                         GError         **error)
+                        xmlNodePtr       node,
+                        GError         **error)
 {
-  g_return_val_if_fail (buildable,FALSE);
+  g_return_val_if_fail (buildable, FALSE);
   g_return_val_if_fail (node, FALSE);
-  
+
   /*
    *    <fkey reftable="products" onupdate="NO_ACTION" ondelete="NO_ACTION">
    *        <fk_field name="column_name" reffield="column_name"/>
@@ -243,7 +243,7 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
    *    </fkey>
    */
   xmlChar *name = NULL;
-  if (g_strcmp0 ((gchar*)node->name,gdadbfkeynodes[GDA_DB_FKEY_NODE]))
+  if (g_strcmp0 ((gchar*)node->name, gdadbfkeynodes[GDA_DB_FKEY_NODE]))
     return FALSE;
 
   GdaDbFkey *self = GDA_DB_FKEY (buildable);
@@ -251,7 +251,7 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
 
   xmlChar *prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_REFTABLE]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_REFTABLE]);
 
   g_assert (prop); /* Bug with xml valdation */
 
@@ -259,15 +259,15 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
   xmlFree (prop);
   prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_ONUPDATE]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_ONUPDATE]);
 
   if (prop)
     {
       priv->m_onupdate = GDA_DB_FKEY_NO_ACTION;
 
-      for (guint i = 0; i < G_N_ELEMENTS(OnAction);i++)
+      for (guint i = 0; i < G_N_ELEMENTS(OnAction); i++)
         {
-          if (!g_strcmp0 ((gchar *)prop,OnAction[i]))
+          if (!g_strcmp0 ((gchar *)prop, OnAction[i]))
             priv->m_onupdate = (GdaDbFkeyReferenceAction)i;
         }
 
@@ -275,14 +275,13 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
       prop = NULL;
     }
 
-
-  prop = xmlGetProp (node,(xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_ONDELETE]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_ONDELETE]);
 
   if (prop)
     {
-      for (guint i = 0; i < G_N_ELEMENTS(OnAction);i++)
+      for (guint i = 0; i < G_N_ELEMENTS(OnAction); i++)
         {
-          if (!g_strcmp0 ((gchar *)prop,OnAction[i]))
+          if (!g_strcmp0 ((gchar *)prop, OnAction[i]))
             priv->m_ondelete = (GdaDbFkeyReferenceAction)i;
         }
 
@@ -296,15 +295,15 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
 
   for (xmlNodePtr it = node->children; it; it = it->next)
     {
-      if (!g_strcmp0 ((gchar *)it->name,gdadbfkeynodes[GDA_DB_FKEY_FKFIELD]))
+      if (!g_strcmp0 ((gchar *)it->name, gdadbfkeynodes[GDA_DB_FKEY_FKFIELD]))
         {
-          name = xmlGetProp (it,(xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_NAME]);
+          name = xmlGetProp (it, (xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_NAME]);
 
           g_assert(name);
-          priv->mp_field = g_list_append (priv->mp_field,g_strdup ((const gchar *)name));
+          priv->mp_field = g_list_append (priv->mp_field, g_strdup ((const gchar *)name));
           xmlFree (name);
 
-          reffield = xmlGetProp (it,(xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_REFIELD]);
+          reffield = xmlGetProp (it, (xmlChar *)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_REFIELD]);
           g_assert(reffield);
           priv->mp_ref_field = g_list_append (priv->mp_ref_field,
                                               g_strdup ((const gchar *)reffield));
@@ -335,25 +334,26 @@ gda_db_fkey_parse_node (GdaDbBuildable *buildable,
  */
 static gboolean
 gda_db_fkey_write_node (GdaDbBuildable  *buildable,
-                         xmlNodePtr rootnode,
-                         GError **error)
+                        xmlNodePtr rootnode,
+                        GError **error)
 {
   g_return_val_if_fail (buildable, FALSE);
   g_return_val_if_fail (rootnode,FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FASLE);
 
   GdaDbFkey *self = GDA_DB_FKEY (buildable);
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
   xmlNodePtr node = NULL;
-  node  = xmlNewChild (rootnode,NULL,(xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_NODE],NULL);
+  node  = xmlNewChild (rootnode, NULL, (xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_NODE], NULL);
 
-  xmlNewProp (node,BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_REFTABLE],
+  xmlNewProp (node, BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_REFTABLE],
               BAD_CAST priv->mp_ref_table);
-  
-  xmlNewProp (node,BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_ONUPDATE],
+
+  xmlNewProp (node, BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_ONUPDATE],
               BAD_CAST priv->m_onupdate);
 
-  xmlNewProp (node,BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_ONDELETE],
+  xmlNewProp (node, BAD_CAST gdadbfkeynodes[GDA_DB_FKEY_ONDELETE],
               BAD_CAST priv->m_ondelete);
 
   GList *it = priv->mp_field;
@@ -362,12 +362,12 @@ gda_db_fkey_write_node (GdaDbBuildable  *buildable,
   for (; it && jt; it = it->next, jt=jt->next )
     {
       xmlNodePtr tnode = NULL;
-      tnode = xmlNewChild (node,NULL,(xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD],NULL);
+      tnode = xmlNewChild (node, NULL,(xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD], NULL);
 
-      xmlNewProp (tnode,(xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_NAME],
+      xmlNewProp (tnode, (xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_NAME],
                   BAD_CAST it->data);
 
-      xmlNewProp (tnode,(xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_REFIELD],
+      xmlNewProp (tnode, (xmlChar*)gdadbfkeynodes[GDA_DB_FKEY_FKFIELD_REFIELD],
                   BAD_CAST jt->data);
     }
 
@@ -386,14 +386,14 @@ gda_db_fkey_buildable_interface_init (GdaDbBuildableInterface *iface)
  * @self: An object #GdaDbFkey
  *
  * Return: ON DELETE action as a string. If the action is not set then the string corresponding to
- * NO_ACTION is returned. 
+ * NO_ACTION is returned.
  *
  * Since: 6.0
  */
 const gchar *
 gda_db_fkey_get_ondelete (GdaDbFkey *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
@@ -403,7 +403,7 @@ gda_db_fkey_get_ondelete (GdaDbFkey *self)
 /**
  * gda_db_fkey_get_ondelete_id:
  * @self: a #GdaDbFkey object
- * 
+ *
  * The default value is %NO_ACTION
  *
  * Return: ON DELETE action as a #GdaDbFkeyReferenceAction.
@@ -413,6 +413,8 @@ gda_db_fkey_get_ondelete (GdaDbFkey *self)
 GdaDbFkeyReferenceAction
 gda_db_fkey_get_ondelete_id (GdaDbFkey *self)
 {
+  g_return_val_if_fail (self, NULL);
+
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
   return priv->m_ondelete;
@@ -429,7 +431,7 @@ gda_db_fkey_get_ondelete_id (GdaDbFkey *self)
  */
 void
 gda_db_fkey_set_onupdate (GdaDbFkey *self,
-                           GdaDbFkeyReferenceAction id)
+                          GdaDbFkeyReferenceAction id)
 {
   g_return_if_fail (self);
 
@@ -449,7 +451,7 @@ gda_db_fkey_set_onupdate (GdaDbFkey *self,
  */
 void
 gda_db_fkey_set_ondelete (GdaDbFkey *self,
-                           GdaDbFkeyReferenceAction id)
+                          GdaDbFkeyReferenceAction id)
 {
   g_return_if_fail (self);
 
@@ -469,7 +471,7 @@ gda_db_fkey_set_ondelete (GdaDbFkey *self,
 const gchar *
 gda_db_fkey_get_onupdate (GdaDbFkey *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
@@ -522,7 +524,7 @@ gda_db_fkey_get_ref_table (GdaDbFkey *self)
  */
 void
 gda_db_fkey_set_ref_table (GdaDbFkey *self,
-                            const gchar *rtable)
+                           const gchar *rtable)
 {
   g_return_if_fail (self);
 
@@ -563,7 +565,7 @@ gda_db_fkey_get_field_name (GdaDbFkey *self)
 const GList *
 gda_db_fkey_get_ref_field (GdaDbFkey *self)
 {
-  g_return_val_if_fail (self,NULL);
+  g_return_val_if_fail (self, NULL);
 
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
@@ -582,8 +584,8 @@ gda_db_fkey_get_ref_field (GdaDbFkey *self)
  */
 void
 gda_db_fkey_set_field (GdaDbFkey  *self,
-                        const gchar *field,
-                        const gchar *reffield)
+                       const gchar *field,
+                       const gchar *reffield)
 {
   g_return_if_fail (self);
   g_return_if_fail (field);
@@ -591,8 +593,8 @@ gda_db_fkey_set_field (GdaDbFkey  *self,
 
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
-  priv->mp_field = g_list_append (priv->mp_field,(gpointer)field);
-  priv->mp_ref_field = g_list_append(priv->mp_ref_field,(gpointer)reffield);
+  priv->mp_field = g_list_append (priv->mp_field, (gpointer)field);
+  priv->mp_ref_field = g_list_append(priv->mp_ref_field, (gpointer)reffield);
 }
 
 /**
@@ -601,7 +603,7 @@ gda_db_fkey_set_field (GdaDbFkey  *self,
  * @op: a #GdaServerOperation to populate
  * @error: error container
  *
- * Prepare @op object for execution by populating with information stored in @self. 
+ * Prepare @op object for execution by populating with information stored in @self.
  *
  * Returns: %TRUE if no error or %FALSE otherwise.
  *
@@ -609,9 +611,9 @@ gda_db_fkey_set_field (GdaDbFkey  *self,
  */
 gboolean
 gda_db_fkey_prepare_create  (GdaDbFkey *self,
-                              GdaServerOperation *op,
-                              gint i,
-                              GError **error)
+                             GdaServerOperation *op,
+                             gint i,
+                             GError **error)
 {
   GdaDbFkeyPrivate *priv = gda_db_fkey_get_instance_private (self);
 
diff --git a/libgda/gda-db-table.c b/libgda/gda-db-table.c
index e45e4e1b8..2263f146d 100644
--- a/libgda/gda-db-table.c
+++ b/libgda/gda-db-table.c
@@ -1,6 +1,6 @@
 /* gda-db-table.c
  *
- * Copyright (C) 2018 Pavlo Solntsev <p sun fun gmail com>
+ * Copyright (C) 2018-2019 Pavlo Solntsev <p sun fun gmail com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -28,7 +28,7 @@
 #include "gda-meta-struct.h"
 #include <glib/gi18n-lib.h>
 
-G_DEFINE_QUARK (gda_db_table_error,gda_db_table_error)
+G_DEFINE_QUARK (gda_db_table_error, gda_db_table_error)
 
 typedef struct
 {
@@ -43,12 +43,12 @@ typedef struct
  * SECTION:gda-db-table
  * @title: GdaDbTable
  * @short_description: Object to represent table database object
- * @see_also: #GdaDbView, #GdaDbCreator
+ * @see_also: #GdaDbView, #GdaDbCatalog
  * @stability: Stable
  * @include: libgda/libgda.h
  *
  * This object represents a table of a database. The table view can be constracted manually
- * using API or generated from xml file together with other databse objects. See #GdaDbCreator.
+ * using API or generated from xml file together with other databse objects. See #GdaDbCatalog.
  * #GdaDbTable implements #GdaDbBuildable interface for parsing xml file.
  */
 
@@ -71,27 +71,29 @@ static GParamSpec *properties [N_PROPS] = {NULL};
 
 /* This is a convenient way to name all nodes from xml file */
 enum {
-  GDA_DB_TABLE_NODE,
-  GDA_DB_TABLE_NAME,
-  GDA_DB_TABLE_TEMP,
-  GDA_DB_TABLE_SPACE,
-  GDA_DB_TABLE_COMMENT,
+    GDA_DB_TABLE_NODE,
+    GDA_DB_TABLE_NAME,
+    GDA_DB_TABLE_TEMP,
+    GDA_DB_TABLE_SPACE,
+    GDA_DB_TABLE_COMMENT,
 
-  GDA_DB_TABLE_N_NODES
+    GDA_DB_TABLE_N_NODES
 };
 
-const gchar *gdadbtablenodes[GDA_DB_TABLE_N_NODES] = {
-  "table",
-  "name",
-  "temptable",
-  "space",
-  "comment"
+static const gchar *gdadbtablenodes[GDA_DB_TABLE_N_NODES] = {
+    "table",
+    "name",
+    "temptable",
+    "space",
+    "comment"
 };
 
 /**
  * gda_db_table_new:
  *
  * Returns: New instance of #GdaDbTable.
+ *
+ * Since: 6.0
  */
 GdaDbTable *
 gda_db_table_new (void)
@@ -126,31 +128,30 @@ gda_db_table_dispose (GObject *object)
 
 static void
 gda_db_table_get_property (GObject    *object,
-                            guint       prop_id,
-                            GValue     *value,
-                            GParamSpec *pspec)
+                           guint       prop_id,
+                           GValue     *value,
+                           GParamSpec *pspec)
 {
   GdaDbTable *self = GDA_DB_TABLE (object);
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
   switch (prop_id) {
     case PROP_COMMENT:
-      g_value_set_string (value,priv->mp_comment);
+      g_value_set_string (value, priv->mp_comment);
       break;
     case PROP_ISTEMP:
-      g_value_set_boolean (value,priv->m_istemp);
+      g_value_set_boolean (value, priv->m_istemp);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
   }
-
 }
 
 static void
 gda_db_table_set_property (GObject      *object,
-                            guint         prop_id,
-                            const GValue *value,
-                            GParamSpec   *pspec)
+                           guint         prop_id,
+                           const GValue *value,
+                           GParamSpec   *pspec)
 {
   GdaDbTable *self = GDA_DB_TABLE (object);
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
@@ -189,7 +190,7 @@ gda_db_table_class_init (GdaDbTableClass *klass)
                                                  NULL,
                                                  G_PARAM_READWRITE);
 
-  g_object_class_install_properties (object_class,N_PROPS,properties);
+  g_object_class_install_properties (object_class, N_PROPS, properties);
 }
 
 static void
@@ -217,10 +218,10 @@ gda_db_table_init (GdaDbTable *self)
  */
 static gboolean
 gda_db_table_parse_node (GdaDbBuildable *buildable,
-                          xmlNodePtr   node,
-                          GError      **error)
+                         xmlNodePtr    node,
+                         GError      **error)
 {
-  g_return_val_if_fail (buildable,FALSE);
+  g_return_val_if_fail (buildable, FALSE);
   g_return_val_if_fail (node, FALSE);
 
   GdaDbTable *self = GDA_DB_TABLE (buildable);
@@ -228,53 +229,54 @@ gda_db_table_parse_node (GdaDbBuildable *buildable,
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
   xmlChar *name = NULL;
-  name = xmlGetProp (node,(xmlChar *)gdadbtablenodes[GDA_DB_TABLE_NAME]);
+  name = xmlGetProp (node, (xmlChar *)gdadbtablenodes[GDA_DB_TABLE_NAME]);
   g_assert (name); /* If here bug with xml validation */
-  gda_db_base_set_name(GDA_DB_BASE(self),(gchar *)name);
+  gda_db_base_set_name(GDA_DB_BASE(self), (gchar*)name);
 
-  xmlChar *tempt = xmlGetProp (node,(xmlChar*)gdadbtablenodes[GDA_DB_TABLE_TEMP]);
+  xmlChar *tempt = xmlGetProp (node, (xmlChar*)gdadbtablenodes[GDA_DB_TABLE_TEMP]);
 
   if (tempt && (*tempt == 't' || *tempt == 't'))
     {
-      g_object_set (G_OBJECT(self),"istemp",TRUE,NULL);
+      g_object_set (G_OBJECT(self), "istemp", TRUE, NULL);
       xmlFree (tempt);
     }
 
   for (xmlNodePtr it = node->children; it ; it = it->next)
     {
-      if (!g_strcmp0 ((gchar *) it->name,gdadbtablenodes[GDA_DB_TABLE_COMMENT]))
+      if (!g_strcmp0 ((gchar *) it->name, gdadbtablenodes[GDA_DB_TABLE_COMMENT]))
         {
           xmlChar *comment = xmlNodeGetContent (it);
 
           if (comment)
             {
-              g_object_set (G_OBJECT(self),"comment", (char *)comment,NULL);
+              g_object_set (G_OBJECT(self), "comment", (char*)comment, NULL);
               xmlFree (comment);
             }
         }
-      else if (!g_strcmp0 ((gchar *) it->name, "column"))
+      else if (!g_strcmp0 ((gchar *)it->name, "column"))
         {
           GdaDbColumn *column = gda_db_column_new ();
 
-          if (!gda_db_buildable_parse_node(GDA_DB_BUILDABLE (column),
-                                            it, error))
+          if (!gda_db_buildable_parse_node(GDA_DB_BUILDABLE (column), it, error))
             {
               g_object_unref(column);
               return FALSE;
             }
           else
-            priv->mp_columns = g_list_append (priv->mp_columns,column);
+            priv->mp_columns = g_list_append (priv->mp_columns, column);
         }
-      else if (!g_strcmp0 ((gchar *) it->name, "fkey"))
+      else if (!g_strcmp0 ((gchar*)it->name, "fkey"))
         {
           GdaDbFkey *fkey;
           fkey = gda_db_fkey_new ();
 
-          if (!gda_db_buildable_parse_node (GDA_DB_BUILDABLE(fkey), it, error)) {
+          if (!gda_db_buildable_parse_node (GDA_DB_BUILDABLE(fkey), it, error))
+            {
               g_object_unref (fkey);
               return FALSE;
-          } else
-            priv->mp_fkeys = g_list_append (priv->mp_fkeys,fkey);
+            }
+          else
+            priv->mp_fkeys = g_list_append (priv->mp_fkeys, fkey);
         } /* end of else if */
     } /* End of for loop */
   return TRUE;
@@ -282,32 +284,31 @@ gda_db_table_parse_node (GdaDbBuildable *buildable,
 
 static gboolean
 gda_db_table_write_node (GdaDbBuildable *buildable,
-                          xmlNodePtr       rootnode,
-                          GError         **error)
+                         xmlNodePtr       rootnode,
+                         GError         **error)
 {
-  g_return_val_if_fail (buildable,FALSE);
-  g_return_val_if_fail (rootnode,FALSE);
+  g_return_val_if_fail (buildable, FALSE);
+  g_return_val_if_fail (rootnode, FALSE);
 
   GdaDbTable *self = GDA_DB_TABLE (buildable);
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
   xmlNodePtr node = NULL;
-  node  = xmlNewChild (rootnode,NULL,(xmlChar*)gdadbtablenodes[GDA_DB_TABLE_NODE],NULL);
-  xmlNewProp (node,BAD_CAST gdadbtablenodes[GDA_DB_TABLE_NAME],
+  node  = xmlNewChild (rootnode, NULL, (xmlChar*)gdadbtablenodes[GDA_DB_TABLE_NODE], NULL);
+  xmlNewProp (node, BAD_CAST gdadbtablenodes[GDA_DB_TABLE_NAME],
               BAD_CAST gda_db_base_get_name (GDA_DB_BASE(self)));
 
-  xmlNewProp (node,BAD_CAST gdadbtablenodes[GDA_DB_TABLE_TEMP],
+  xmlNewProp (node, BAD_CAST gdadbtablenodes[GDA_DB_TABLE_TEMP],
               BAD_CAST GDA_BOOL_TO_STR (priv->m_istemp));
 
-  xmlNewChild (node,NULL,
+  xmlNewChild (node, NULL,
                (xmlChar*)gdadbtablenodes[GDA_DB_TABLE_COMMENT],
                (xmlChar*)priv->mp_comment);
 
   GList *it = NULL;
 
   for (it = priv->mp_columns; it; it=it->next)
-    if(!gda_db_buildable_write_node (GDA_DB_BUILDABLE(GDA_DB_COLUMN(it->data)),
-                                      node,error))
+    if(!gda_db_buildable_write_node (GDA_DB_BUILDABLE(GDA_DB_COLUMN(it->data)), node,error))
       return FALSE;
 
   return TRUE;
@@ -332,15 +333,16 @@ gda_db_table_buildable_interface_init (GdaDbBuildableInterface *iface)
  */
 void
 gda_db_table_set_comment (GdaDbTable *self,
-                           const char  *tablecomment)
+                          const char  *tablecomment)
 {
   g_return_if_fail (self);
 
-  if (tablecomment) {
+  if (tablecomment)
+    {
       GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
       g_free (priv->mp_comment);
-      priv->mp_comment = g_utf8_strup (tablecomment,g_utf8_strlen (tablecomment,-1));
-  }
+      priv->mp_comment = g_utf8_strup (tablecomment, g_utf8_strlen (tablecomment, -1));
+    }
 }
 
 /**
@@ -348,7 +350,7 @@ gda_db_table_set_comment (GdaDbTable *self,
  * @self: a #GdaDbTable object
  * @istemp: Set if the table should be temporary
  *
- * Set if the table should be temporary or not.  False is set by default.
+ * Set if the table should be temporary or not.  %FALSE is set by default.
  *
  * Since: 6.0
  */
@@ -366,6 +368,8 @@ gda_db_table_set_is_temp (GdaDbTable *self,
  * @self: a #GdaDbTable object
  *
  * Returns: A comment string or %NULL if comment wasn't set.
+ *
+ * Since: 6.0
  */
 const char*
 gda_db_table_get_comment (GdaDbTable *self)
@@ -388,16 +392,27 @@ gda_db_table_get_comment (GdaDbTable *self)
 gboolean
 gda_db_table_get_temp (GdaDbTable *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
 
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
   return priv->m_istemp;
 }
 
+/**
+ * gda_db_table_is_valid:
+ * @self: a #GdaDbTable instance
+ *
+ * This method returns %TRUE if at least one column is added to the table. It ruturns %FALSE if the
+ * table has no columns.
+ *
+ * Returns: %TRUE or %FALSE
+ *
+ * Since: 6.0
+ */
 gboolean
 gda_db_table_is_valid (GdaDbTable *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
 
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
@@ -417,10 +432,11 @@ gda_db_table_is_valid (GdaDbTable *self)
  * Use this method to obtain internal list of all columns. The internal list
  * should not be freed.
  *
- * Returns: (element-type Gda.DbColumn) (transfer none): A list of #GdaDbColumn objects or %NULL if the 
internal list is
- * not set or if %NULL is passed.
+ * Returns: (element-type Gda.DbColumn) (transfer none): A list of #GdaDbColumn objects or %NULL
+ * if the internal list is not set or if %NULL is passed.
  *
  * Since: 6.0
+ *
  */
 GList*
 gda_db_table_get_columns (GdaDbTable *self)
@@ -438,8 +454,8 @@ gda_db_table_get_columns (GdaDbTable *self)
  * Use this method to obtain internal list of all fkeys. The internal list
  * should not be freed.
  *
- * Returns: (transfer none) (element-type Gda.DbFkey): A list of #GdaDbFkey objects or %NULL if the internal 
list is not
- * set or %NULL is passed
+ * Returns: (transfer none) (element-type Gda.DbFkey): A list of #GdaDbFkey objects or %NULL if
+ * the internal list is not set or %NULL is passed
  *
  * Since: 6.0
  */
@@ -480,13 +496,15 @@ gda_db_table_get_is_temp (GdaDbTable *self)
  * Populate @op with information stored in @self. This method sets @op to execute CREATE_TABLE
  * operation.
  *
+ * Returns: %TRUE if no error occured and %FALSE otherwise.
+ *
  * Since: 6.0
  */
 gboolean
 gda_db_table_prepare_create (GdaDbTable *self,
-                              GdaServerOperation *op,
-                              gboolean ifnotexists,
-                              GError **error)
+                             GdaServerOperation *op,
+                             gboolean ifnotexists,
+                             GError **error)
 {
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
@@ -530,7 +548,8 @@ gda_db_table_prepare_create (GdaDbTable *self,
 }
 
 static gint
-_gda_db_compare_column_meta(GdaMetaTableColumn *a,GdaDbColumn *b)
+_gda_db_compare_column_meta (GdaMetaTableColumn *a,
+                             GdaDbColumn *b)
 {
   if (a && !b)
     return 1;
@@ -540,9 +559,9 @@ _gda_db_compare_column_meta(GdaMetaTableColumn *a,GdaDbColumn *b)
     return 0;
 
   const gchar *namea = a->column_name;
-  const gchar *nameb = gda_db_column_get_name(b);
+  const gchar *nameb = gda_db_column_get_name (b);
 
-  return g_strcmp0(namea,nameb);
+  return g_strcmp0 (namea,nameb);
 }
 
 /**
@@ -559,22 +578,23 @@ _gda_db_compare_column_meta(GdaMetaTableColumn *a,GdaDbColumn *b)
  */
 gboolean
 gda_db_table_update (GdaDbTable *self,
-                      GdaMetaTable *obj,
-                      GdaConnection *cnc,
-                      GError **error)
+                     GdaMetaTable *obj,
+                     GdaConnection *cnc,
+                     GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (obj,FALSE);
-  g_return_val_if_fail (cnc,FALSE);
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (obj, FALSE);
+  g_return_val_if_fail (cnc, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
-  if (!gda_connection_is_opened(cnc))
+  if (!gda_connection_is_opened (cnc))
     return FALSE;
 
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
   if (!obj->columns)
     {
-      g_set_error (error,GDA_DB_TABLE_ERROR,GDA_DB_TABLE_COLUMN_EMPTY,_("Empty column list"));
+      g_set_error (error, GDA_DB_TABLE_ERROR, GDA_DB_TABLE_COLUMN_EMPTY, _("Empty column list"));
       return FALSE;
     }
 
@@ -586,22 +606,22 @@ gda_db_table_update (GdaDbTable *self,
 
   dbcolumns = obj->columns;
 
-  gda_lockable_lock((GdaLockable*)cnc);
+  gda_lockable_lock ((GdaLockable*)cnc);
 
   provider = gda_connection_get_provider (cnc);
 
-  op = gda_server_provider_create_operation(provider,
-                                            cnc,
-                                            GDA_SERVER_OPERATION_ADD_COLUMN,
-                                            NULL,
-                                            error);
+  op = gda_server_provider_create_operation (provider,
+                                             cnc,
+                                             GDA_SERVER_OPERATION_ADD_COLUMN,
+                                             NULL,
+                                             error);
   if (!op)
     goto on_error;
 
-  if(!gda_server_operation_set_value_at(op,
-                                        gda_db_base_get_full_name(GDA_DB_BASE(self)),
-                                        error,
-                                        "/COLUMN_DEF_P/TABLE_NAME"))
+  if(!gda_server_operation_set_value_at (op,
+                                         gda_db_base_get_full_name (GDA_DB_BASE(self)),
+                                         error,
+                                         "/COLUMN_DEF_P/TABLE_NAME"))
     goto on_error;
 
   gint newcolumncount = 0;
@@ -616,7 +636,7 @@ gda_db_table_update (GdaDbTable *self,
       else
         newcolumncount++; /* We need to count new column. See below */
 
-      if(!gda_db_column_prepare_add(it->data,op,error))
+      if(!gda_db_column_prepare_add (it->data, op, error))
         {
           g_slist_free (res);
           goto on_error;
@@ -624,16 +644,16 @@ gda_db_table_update (GdaDbTable *self,
     }
 
   if (newcolumncount != 0) /* Run operation only if at least on column is present*/
-    if(!gda_server_provider_perform_operation(provider,cnc,op,error))
+    if(!gda_server_provider_perform_operation (provider, cnc, op, error))
       goto on_error;
 
   g_object_unref(op);
-  gda_lockable_unlock((GdaLockable*)cnc);
+  gda_lockable_unlock ((GdaLockable*)cnc);
   return TRUE;
 
 on_error:
   g_object_unref(op);
-  gda_lockable_unlock((GdaLockable*)cnc);
+  gda_lockable_unlock ((GdaLockable*)cnc);
   return FALSE;
 }
 
@@ -653,12 +673,13 @@ on_error:
  */
 gboolean
 gda_db_table_create (GdaDbTable *self,
-                      GdaConnection *cnc,
-                      gboolean ifnotexists,
-                      GError **error)
+                     GdaConnection *cnc,
+                     gboolean ifnotexists,
+                     GError **error)
 {
   g_return_val_if_fail (self, FALSE);
   g_return_val_if_fail (cnc, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
  if (!gda_connection_is_opened (cnc))
     {
@@ -668,7 +689,7 @@ gda_db_table_create (GdaDbTable *self,
                    _("Connection is not opened"));
       return FALSE;
     }
-  gda_lockable_lock(GDA_LOCKABLE(cnc));
+  gda_lockable_lock (GDA_LOCKABLE(cnc));
 
   GdaServerProvider *provider = NULL;
   GdaServerOperation *op = NULL;
@@ -676,24 +697,27 @@ gda_db_table_create (GdaDbTable *self,
 
   provider = gda_connection_get_provider (cnc);
 
-  op = gda_server_provider_create_operation(provider,
-                                            cnc,
-                                            GDA_SERVER_OPERATION_CREATE_TABLE,
-                                            NULL,
-                                            error);
-  if (op) {
-    g_object_set_data_full (G_OBJECT (op), "connection", g_object_ref (cnc), g_object_unref);
-    if (gda_db_table_prepare_create(self, op, ifnotexists, error)) {
+  op = gda_server_provider_create_operation (provider,
+                                             cnc,
+                                             GDA_SERVER_OPERATION_CREATE_TABLE,
+                                             NULL,
+                                             error);
+  if (op) 
+    {
+      g_object_set_data_full (G_OBJECT (op), "connection", g_object_ref (cnc), g_object_unref);
+
+      if (gda_db_table_prepare_create (self, op, ifnotexists, error)) 
+        {
 #ifdef GDA_DEBUG_NO
-      gchar* str = gda_server_operation_render (op, error);
-      g_message ("Operation: %s", str);
-      g_free (str);
+          gchar* str = gda_server_operation_render (op, error);
+          g_message ("Operation: %s", str);
+          g_free (str);
 #endif
-      res = gda_server_provider_perform_operation(provider, cnc, op, error);
+          res = gda_server_provider_perform_operation (provider, cnc, op, error);
+        }
+      g_object_unref (op);
     }
-    g_object_unref (op);
-  }
-  gda_lockable_unlock(GDA_LOCKABLE(cnc));
+  gda_lockable_unlock (GDA_LOCKABLE(cnc));
 
   return res;
 }
@@ -709,13 +733,14 @@ gda_db_table_create (GdaDbTable *self,
  */
 void
 gda_db_table_append_column (GdaDbTable *self,
-                             GdaDbColumn *column)
+                            GdaDbColumn *column)
 {
   g_return_if_fail (self);
+  g_return_if_fail (column);
 
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
-  priv->mp_columns = g_list_append (priv->mp_columns,g_object_ref(column));
+  priv->mp_columns = g_list_append (priv->mp_columns, g_object_ref (column));
 }
 
 /**
@@ -729,12 +754,12 @@ gda_db_table_append_column (GdaDbTable *self,
  */
 void
 gda_db_table_append_fkey (GdaDbTable *self,
-                           GdaDbFkey *fkey)
+                          GdaDbFkey *fkey)
 {
   g_return_if_fail (self);
 
   GdaDbTablePrivate *priv = gda_db_table_get_instance_private (self);
 
-  priv->mp_fkeys = g_list_append (priv->mp_fkeys,g_object_ref(fkey));
+  priv->mp_fkeys = g_list_append (priv->mp_fkeys, g_object_ref (fkey));
 }
 
diff --git a/libgda/gda-db-view.c b/libgda/gda-db-view.c
index 9ac71432c..4ab0e9875 100644
--- a/libgda/gda-db-view.c
+++ b/libgda/gda-db-view.c
@@ -1,6 +1,6 @@
 /* gda-db-view.c
  *
- * Copyright (C) 2018 Pavlo Solntsev <p sun fun gmail com>
+ * Copyright (C) 2018-2019 Pavlo Solntsev <p sun fun gmail com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -36,12 +36,12 @@ typedef struct
 /**
  * SECTION:gda-db-view
  * @short_description: Object to represent view database object
- * @see_also: GdaDbTable, GdaDbCreator
+ * @see_also: #GdaDbTable, #GdaDbCatalog
  * @stability: Stable
  * @include: libgda/libgda.h
  *
  * This object represents a view of a database. The view can be constracted manually
- * using API or generated from xml file together with other databse objects. See #GdaDbCreator.
+ * using API or generated from xml file together with other databse objects. See #GdaDbCatalog.
  * #GdaDbView implements #GdaDbBuildable interface for parsing xml file.
  */
 
@@ -54,31 +54,31 @@ G_DEFINE_TYPE_WITH_CODE (GdaDbView, gda_db_view, GDA_TYPE_DB_BASE,
 
 /* This is convenient way to name all nodes from xml file */
 enum {
-  GDA_DB_VIEW_NODE,
-  GDA_DB_VIEW_IFNOEXIST,
-  GDA_DB_VIEW_TEMP,
-  GDA_DB_VIEW_REPLACE,
-  GDA_DB_VIEW_NAME,
-  GDA_DB_VIEW_DEFSTR,
-  GDA_DB_VIEW_N_NODES
+    GDA_DB_VIEW_NODE,
+    GDA_DB_VIEW_IFNOEXIST,
+    GDA_DB_VIEW_TEMP,
+    GDA_DB_VIEW_REPLACE,
+    GDA_DB_VIEW_NAME,
+    GDA_DB_VIEW_DEFSTR,
+    GDA_DB_VIEW_N_NODES
 };
 
-const gchar *gdadbviewnodes[GDA_DB_VIEW_N_NODES] = {
-  "view",
-  "ifnoexist",
-  "temp",
-  "replace",
-  "name",
-  "definition"
+static const gchar *gdadbviewnodes[GDA_DB_VIEW_N_NODES] = {
+    "view",
+    "ifnoexist",
+    "temp",
+    "replace",
+    "name",
+    "definition"
 };
 
 enum {
-  PROP_0,
-  PROP_VIEW_TEMP,
-  PROP_VIEW_REPLACE,
-  PROP_VIEW_IFNOEXIST,
-  PROP_VIEW_DEFSTR,
-  N_PROPS 
+    PROP_0,
+    PROP_VIEW_TEMP,
+    PROP_VIEW_REPLACE,
+    PROP_VIEW_IFNOEXIST,
+    PROP_VIEW_DEFSTR,
+    N_PROPS
 };
 
 static GParamSpec *properties [N_PROPS] = {NULL};
@@ -109,14 +109,15 @@ gda_db_view_finalize (GObject *object)
 
 static void
 gda_db_view_get_property (GObject    *object,
-                           guint       prop_id,
-                           GValue     *value,
-                           GParamSpec *pspec)
+                          guint       prop_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
 {
   GdaDbView *self = GDA_DB_VIEW (object);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
 
-  switch (prop_id) {
+  switch (prop_id)
+    {
     case PROP_VIEW_TEMP:
       g_value_set_boolean (value,priv->m_istemp);
       break;
@@ -132,19 +133,20 @@ gda_db_view_get_property (GObject    *object,
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
-  }
+    }
 }
 
 static void
 gda_db_view_set_property (GObject      *object,
-                           guint         prop_id,
-                           const GValue *value,
-                           GParamSpec   *pspec)
+                          guint         prop_id,
+                          const GValue *value,
+                          GParamSpec   *pspec)
 {
   GdaDbView *self = GDA_DB_VIEW (object);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
 
-  switch (prop_id){
+  switch (prop_id)
+    {
     case PROP_VIEW_TEMP:
       priv->m_istemp = g_value_get_boolean (value);
       break;
@@ -161,7 +163,7 @@ gda_db_view_set_property (GObject      *object,
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
-  }
+    }
 }
 
 static void
@@ -198,7 +200,7 @@ gda_db_view_class_init (GdaDbViewClass *klass)
                           FALSE,
                           G_PARAM_READWRITE);
 
-  g_object_class_install_properties (object_class,N_PROPS,properties);
+  g_object_class_install_properties (object_class, N_PROPS, properties);
 }
 
 static void
@@ -213,70 +215,74 @@ gda_db_view_init (GdaDbView *self)
 
 static gboolean
 gda_db_view_parse_node (GdaDbBuildable *buildable,
-                         xmlNodePtr node,
-                         GError **error)
+                        xmlNodePtr node,
+                        GError **error)
 {
-  GdaDbView *self = GDA_DB_VIEW (buildable);
   g_return_val_if_fail (node, FALSE);
+  g_return_val_if_fail (node, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+  GdaDbView *self = GDA_DB_VIEW (buildable);
 
 /*
  * <view name="Total" replace="TRUE" temp="TRUE" ifnoexists="TRUE">
  *   <definition>SELECT id,name FROM CUSTOMER</definition>
  * </view>
  */
-  
+
   xmlChar *prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbviewnodes[GDA_DB_VIEW_NAME]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbviewnodes[GDA_DB_VIEW_NAME]);
   g_assert (prop); /* Bug with xml valdation */
 
-  gda_db_base_set_name(GDA_DB_BASE(self),(gchar*)prop);
+  gda_db_base_set_name (GDA_DB_BASE(self), (gchar*)prop);
   xmlFree (prop);
   prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbviewnodes[GDA_DB_VIEW_REPLACE]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbviewnodes[GDA_DB_VIEW_REPLACE]);
   if (prop)
-    g_object_set (G_OBJECT(self),"replace",*prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
+    g_object_set (G_OBJECT(self), "replace", *prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
 
   xmlFree (prop);
   prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbviewnodes[GDA_DB_VIEW_TEMP]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbviewnodes[GDA_DB_VIEW_TEMP]);
   if (prop)
-    g_object_set (G_OBJECT(self),"istemp",*prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
+    g_object_set (G_OBJECT(self), "istemp", *prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
 
   xmlFree (prop);
   prop = NULL;
 
-  prop = xmlGetProp (node,(xmlChar *)gdadbviewnodes[GDA_DB_VIEW_IFNOEXIST]);
+  prop = xmlGetProp (node, (xmlChar *)gdadbviewnodes[GDA_DB_VIEW_IFNOEXIST]);
   if (prop)
-    g_object_set (G_OBJECT(self),"ifnoexist",*prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
+    g_object_set (G_OBJECT(self), "ifnoexist", *prop == 't' || *prop == 'T' ? TRUE : FALSE, NULL);
 
   xmlFree (prop);
   prop = NULL;
-/* Loop here is for the following expension if we need to add more children 
- * nodes it will be easy to add 
+/* Loop here is for the following expension if we need to add more children
+ * nodes it will be easy to add
  */
   for (xmlNodePtr it = node->children; it ; it = it->next)
     {
       if (!g_strcmp0 ((char *)it->name,gdadbviewnodes[GDA_DB_VIEW_DEFSTR]))
         {
           xmlChar *def = xmlNodeGetContent (it);
-          gda_db_view_set_defstring (self,(gchar*)def);
+          gda_db_view_set_defstring (self, (gchar*)def);
           xmlFree (def);
         }
     }
-  
+
   return TRUE;
 }
 
 static gboolean
 gda_db_view_write_node (GdaDbBuildable *buildable,
-                         xmlNodePtr rootnode,
-                         GError **error)
+                        xmlNodePtr rootnode,
+                        GError **error)
 {
-  g_return_val_if_fail (buildable,FALSE);
-  g_return_val_if_fail (rootnode,FALSE);
+  g_return_val_if_fail (buildable, FALSE);
+  g_return_val_if_fail (rootnode, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   GdaDbView *self = GDA_DB_VIEW (buildable);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
@@ -286,7 +292,7 @@ gda_db_view_write_node (GdaDbBuildable *buildable,
                        NULL,
                        BAD_CAST gdadbviewnodes[GDA_DB_VIEW_NODE],
                        NULL);
-  
+
   xmlNewProp (node,
               BAD_CAST gdadbviewnodes[GDA_DB_VIEW_NODE],
               BAD_CAST gda_db_base_get_name (GDA_DB_BASE(self)));
@@ -341,7 +347,8 @@ gda_db_view_get_istemp (GdaDbView *self)
  * Since: 6.0
  */
 void
-gda_db_view_set_istemp (GdaDbView *self,gboolean temp)
+gda_db_view_set_istemp (GdaDbView *self,
+                        gboolean temp)
 {
   g_return_if_fail (self);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
@@ -359,7 +366,7 @@ gda_db_view_set_istemp (GdaDbView *self,gboolean temp)
 gboolean
 gda_db_view_get_ifnoexist (GdaDbView *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
   return priv->m_ifnoexist;
 }
@@ -373,7 +380,7 @@ gda_db_view_get_ifnoexist (GdaDbView *self)
  */
 void
 gda_db_view_set_ifnoexist (GdaDbView *self,
-                            gboolean noexist)
+                           gboolean noexist)
 {
   g_return_if_fail (self);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
@@ -390,7 +397,7 @@ gda_db_view_set_ifnoexist (GdaDbView *self,
 const gchar*
 gda_db_view_get_defstring (GdaDbView *self)
 {
-  g_return_val_if_fail (self,FALSE);
+  g_return_val_if_fail (self, FALSE);
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
   return priv->mp_defstring;
 }
@@ -455,7 +462,7 @@ gda_db_view_set_replace (GdaDbView *self,
  *
  * This method performs CREATE_VIEW operation over @cnc using data stored in @self
  * It is a convenient method to perform operation. See gda_db_view_prepare_create() if better
- * flexibility is needed. 
+ * flexibility is needed.
  *
  * Returns: %TRUE if no error, %FASLE otherwise
  *
@@ -463,42 +470,42 @@ gda_db_view_set_replace (GdaDbView *self,
  */
 gboolean
 gda_db_view_create (GdaDbView *self,
-                     GdaConnection *cnc,
-                     GError **error)
+                    GdaConnection *cnc,
+                    GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (cnc,FALSE);
-  g_return_val_if_fail (gda_connection_is_opened(cnc),FALSE); 
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (cnc && gda_connection_is_opened(cnc), FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
-  gda_lockable_lock((GdaLockable*)cnc);
+  gda_lockable_lock ((GdaLockable*)cnc);
 
   GdaServerProvider *provider = NULL;
   GdaServerOperation *op = NULL;
- 
+
   provider = gda_connection_get_provider (cnc);
 
-  op = gda_server_provider_create_operation(provider,
-                                            cnc,
-                                            GDA_SERVER_OPERATION_CREATE_VIEW,
-                                            NULL,
-                                            error);
+  op = gda_server_provider_create_operation (provider,
+                                             cnc,
+                                             GDA_SERVER_OPERATION_CREATE_VIEW,
+                                             NULL,
+                                             error);
   if (!op)
     goto on_error;
 
-  if (!gda_db_view_prepare_create(self,op,error))
+  if (!gda_db_view_prepare_create (self, op, error))
     goto on_error;
 
-  if(!gda_server_provider_perform_operation(provider,cnc,op,error))
+  if(!gda_server_provider_perform_operation (provider, cnc, op, error))
     goto on_error;
 
   g_object_unref (op);
-  gda_lockable_unlock((GdaLockable*)cnc);
+  gda_lockable_unlock ((GdaLockable*)cnc);
   return TRUE;
 
 on_error:
   if (op) g_object_unref (op);
-  gda_lockable_unlock((GdaLockable*)cnc);
-  return FALSE; 
+  gda_lockable_unlock ((GdaLockable*)cnc);
+  return FALSE;
 }
 
 /**
@@ -509,51 +516,50 @@ on_error:
  *
  * Populate @op with information needed to perform CREATE_VIEW operation.
  *
- * Returns: %TRUE if succeeded and %FALSE otherwise. 
+ * Returns: %TRUE if succeeded and %FALSE otherwise.
  */
 gboolean
 gda_db_view_prepare_create (GdaDbView *self,
-                             GdaServerOperation *op,
-                             GError **error)
+                            GdaServerOperation *op,
+                            GError **error)
 {
-  g_return_val_if_fail (self,FALSE);
-  g_return_val_if_fail (op,FALSE);
+  g_return_val_if_fail (self, FALSE);
+  g_return_val_if_fail (op, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
 
   GdaDbViewPrivate *priv = gda_db_view_get_instance_private (self);
 
-  if (!gda_server_operation_set_value_at(op,
-                                         gda_db_base_get_name(GDA_DB_BASE(self)),
-                                         error,
-                                         "/VIEW_DEF_P/VIEW_NAME"))
+  if (!gda_server_operation_set_value_at (op,
+                                          gda_db_base_get_name (GDA_DB_BASE(self)),
+                                          error,
+                                          "/VIEW_DEF_P/VIEW_NAME"))
     return FALSE;
 
-  if (!gda_server_operation_set_value_at(op,
-                                         GDA_BOOL_TO_STR(priv->m_replace),
-                                         error,
-                                         "/VIEW_DEF_P/VIEW_OR_REPLACE"))
+  if (!gda_server_operation_set_value_at (op,
+                                          GDA_BOOL_TO_STR(priv->m_replace),
+                                          error,
+                                          "/VIEW_DEF_P/VIEW_OR_REPLACE"))
     return FALSE;
 
-  if (!gda_server_operation_set_value_at(op,
-                                         GDA_BOOL_TO_STR(priv->m_ifnoexist),
-                                         error,
-                                         "/VIEW_DEF_P/VIEW_IFNOTEXISTS"))
+  if (!gda_server_operation_set_value_at (op,
+                                          GDA_BOOL_TO_STR(priv->m_ifnoexist),
+                                          error,
+                                          "/VIEW_DEF_P/VIEW_IFNOTEXISTS"))
     return FALSE;
 
-  if (!gda_server_operation_set_value_at(op,
-                                         GDA_BOOL_TO_STR(priv->m_istemp),
-                                         error,
-                                         "/VIEW_DEF_P/VIEW_TEMP"))
+  if (!gda_server_operation_set_value_at (op,
+                                          GDA_BOOL_TO_STR(priv->m_istemp),
+                                          error,
+                                          "/VIEW_DEF_P/VIEW_TEMP"))
     return FALSE;
 
-  if (!gda_server_operation_set_value_at(op,
-                                         priv->mp_defstring,
-                                         error,
-                                         "/VIEW_DEF_P/VIEW_DEF"))
+  if (!gda_server_operation_set_value_at (op,
+                                          priv->mp_defstring,
+                                          error,
+                                          "/VIEW_DEF_P/VIEW_DEF"))
     return FALSE;
 
   return  TRUE;
 }
 
 
-
-
diff --git a/libgda/gda-db-view.h b/libgda/gda-db-view.h
index 173d3d917..92cfb12e3 100644
--- a/libgda/gda-db-view.h
+++ b/libgda/gda-db-view.h
@@ -40,22 +40,6 @@ struct _GdaDbViewClass
   GdaDbBaseClass parent_class;
 };
 
-/**
- * SECTION: GdaDbView
- * @short_description: Object to handle information about view 
- * @title: GdaDbView 
- * @section_id:
- * @see_also: #GdaDbTable #GdaDbCreator
- * @stability: Stable
- * @include: libgda/libgda.h
- * @image: 
- *
- * #GdaDbView object represents a representtaion of the view from the
- * database. It implements #GdaDbBuildbale interface and allows one to
- * read/write information about view structure from/to an xml file. See
- * #GdaDbBuildable for more information.
- */
-
 GdaDbView*  gda_db_view_new            (void);
 
 gboolean     gda_db_view_get_istemp    (GdaDbView *self);


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]