diff --git a/contrib/drivers/pgsql/pgsql_table_fields.go b/contrib/drivers/pgsql/pgsql_table_fields.go
index d69bd46b230..64e0ee790d5 100644
--- a/contrib/drivers/pgsql/pgsql_table_fields.go
+++ b/contrib/drivers/pgsql/pgsql_table_fields.go
@@ -27,7 +27,7 @@ FROM pg_attribute a
          left join pg_description b ON a.attrelid=b.objoid AND a.attnum = b.objsubid
          left join pg_type t ON a.atttypid = t.oid
          left join information_schema.columns ic on ic.column_name = a.attname and ic.table_name = c.relname
-WHERE c.relname = '%s' and a.attisdropped is false and a.attnum > 0
+WHERE c.oid = '%s'::regclass and a.attisdropped is false and a.attnum > 0
 ORDER BY a.attnum`
 )
 
diff --git a/contrib/drivers/pgsql/pgsql_z_unit_db_test.go b/contrib/drivers/pgsql/pgsql_z_unit_db_test.go
index 79f722ee8ed..67b9d7978ad 100644
--- a/contrib/drivers/pgsql/pgsql_z_unit_db_test.go
+++ b/contrib/drivers/pgsql/pgsql_z_unit_db_test.go
@@ -339,8 +339,8 @@ int_col INT);`
 		IntCol int64
 	}
 	// pgsql converts table names to lowercase
+	// mark: [c.oid = '%s'::regclass] is not case-sensitive
 	tableName := "Error_table"
-	errStr := fmt.Sprintf(`The table "%s" may not exist, or the table contains no fields`, tableName)
 	_, err := db.Exec(ctx, fmt.Sprintf(createSql, tableName))
 	gtest.AssertNil(err)
 	defer dropTable(tableName)
@@ -351,7 +351,7 @@ int_col INT);`
 			IntCol: 2,
 		}
 		_, err = db.Model(tableName).Data(data).Insert()
-		t.Assert(err, errStr)
+		t.AssertNE(err, nil)
 
 		// Insert a piece of test data using lowercase
 		_, err = db.Model(strings.ToLower(tableName)).Data(data).Insert()
@@ -360,7 +360,7 @@ int_col INT);`
 		_, err = db.Model(tableName).Where("id", 1).Data(g.Map{
 			"int_col": 9999,
 		}).Update()
-		t.Assert(err, errStr)
+		t.AssertNE(err, nil)
 
 	})
 	// The inserted field does not exist in the table
@@ -370,7 +370,7 @@ int_col INT);`
 			"int_col_22": 11111,
 		}
 		_, err = db.Model(tableName).Data(data).Insert()
-		t.Assert(err, errStr)
+		t.Assert(err, fmt.Errorf(`input data match no fields in table "%s"`, tableName))
 
 		lowerTableName := strings.ToLower(tableName)
 		_, err = db.Model(lowerTableName).Data(data).Insert()