Fix query to join constraint_column_usage also on table_name. (#218)

The query only joined on constraint name and constraint schema which resulted in
constraints from other tables (but same name) returned.

migrator.go

@@ -511,7 +511,7 @@ func (m Migrator) ColumnTypes(value interface{}) (columnTypes []gorm.ColumnType,
 
 		// check primary, unique field
 		{
-			columnTypeRows, err := m.DB.Raw("SELECT constraint_name FROM information_schema.table_constraints tc JOIN information_schema.constraint_column_usage AS ccu USING (constraint_schema, constraint_name) JOIN information_schema.columns AS c ON c.table_schema = tc.constraint_schema AND tc.table_name = c.table_name AND ccu.column_name = c.column_name WHERE constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_schema = ? AND c.table_name = ? AND constraint_type = ?", currentDatabase, currentSchema, table, "UNIQUE").Rows()
+			columnTypeRows, err := m.DB.Raw("SELECT constraint_name FROM information_schema.table_constraints tc JOIN information_schema.constraint_column_usage AS ccu USING (constraint_schema, constraint_catalog, table_name, constraint_name) JOIN information_schema.columns AS c ON c.table_schema = tc.constraint_schema AND tc.table_name = c.table_name AND ccu.column_name = c.column_name WHERE constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_schema = ? AND c.table_name = ? AND constraint_type = ?", currentDatabase, currentSchema, table, "UNIQUE").Rows()
 			if err != nil {
 				return err
 			}
@@ -523,7 +523,7 @@ func (m Migrator) ColumnTypes(value interface{}) (columnTypes []gorm.ColumnType,
 			}
 			columnTypeRows.Close()
 
-			columnTypeRows, err = m.DB.Raw("SELECT c.column_name, constraint_name, constraint_type FROM information_schema.table_constraints tc JOIN information_schema.constraint_column_usage AS ccu USING (constraint_schema, constraint_name) JOIN information_schema.columns AS c ON c.table_schema = tc.constraint_schema AND tc.table_name = c.table_name AND ccu.column_name = c.column_name WHERE constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_schema = ? AND c.table_name = ?", currentDatabase, currentSchema, table).Rows()
+			columnTypeRows, err = m.DB.Raw("SELECT c.column_name, constraint_name, constraint_type FROM information_schema.table_constraints tc JOIN information_schema.constraint_column_usage AS ccu USING (constraint_schema, constraint_catalog, table_name, constraint_name) JOIN information_schema.columns AS c ON c.table_schema = tc.constraint_schema AND tc.table_name = c.table_name AND ccu.column_name = c.column_name WHERE constraint_type IN ('PRIMARY KEY', 'UNIQUE') AND c.table_catalog = ? AND c.table_schema = ? AND c.table_name = ?", currentDatabase, currentSchema, table).Rows()
 			if err != nil {
 				return err
 			}