DDL update: saving layer styles on databases

Fix #11421

Author: jgrocha

src/providers/postgres/qgspostgresprovider.cpp

@@ -4399,12 +4399,12 @@ QGISEXTERN bool saveStyle( const QString& uri, const QString& qmlStyle, const QS
                                          ",f_table_schema varchar"
                                          ",f_table_name varchar"
                                          ",f_geometry_column varchar"
-                                         ",styleName varchar(30)"
+                                         ",styleName text"
                                          ",styleQML xml"
                                          ",styleSLD xml"
                                          ",useAsDefault boolean"
                                          ",description text"
-                                         ",owner varchar(30)"
+                                         ",owner varchar(63)"
                                          ",ui xml"
                                          ",update_time timestamp DEFAULT CURRENT_TIMESTAMP"
                                          ")" ) );

src/providers/spatialite/qgsspatialiteprovider.cpp

@@ -5575,7 +5575,7 @@ QGISEXTERN bool saveStyle( const QString& uri, const QString& qmlStyle, const QS
                                    ",f_table_schema varchar(256)"
                                    ",f_table_name varchar(256)"
                                    ",f_geometry_column varchar(256)"
-                                   ",styleName varchar(30)"
+                                   ",styleName text"
                                    ",styleQML text"
                                    ",styleSLD text"
                                    ",useAsDefault boolean"