orm Improve syncdb

orm/db.go

@@ -1116,3 +1116,61 @@ func (d *dbBase) TimeToDB(t *time.Time, tz *time.Location) {
 func (d *dbBase) DbTypes() map[string]string {
 	return nil
 }
+
+func (d *dbBase) GetTables(db dbQuerier) (map[string]bool, error) {
+	tables := make(map[string]bool)
+	query := d.ins.ShowTablesQuery()
+	rows, err := db.Query(query)
+	if err != nil {
+		return tables, err
+	}
+
+	for rows.Next() {
+		var table string
+		err := rows.Scan(&table)
+		if err != nil {
+			return tables, err
+		}
+		if table != "" {
+			tables[table] = true
+		}
+	}
+
+	return tables, nil
+}
+
+func (d *dbBase) GetColumns(db dbQuerier, table string) (map[string][3]string, error) {
+	columns := make(map[string][3]string)
+	query := d.ins.ShowColumnsQuery(table)
+	rows, err := db.Query(query)
+	if err != nil {
+		return columns, err
+	}
+
+	for rows.Next() {
+		var (
+			name string
+			typ  string
+			null string
+		)
+		err := rows.Scan(&name, &typ, &null)
+		if err != nil {
+			return columns, err
+		}
+		columns[name] = [3]string{name, typ, null}
+	}
+
+	return columns, nil
+}
+
+func (d *dbBase) ShowTablesQuery() string {
+	panic(ErrNotImplement)
+}
+
+func (d *dbBase) ShowColumnsQuery(table string) string {
+	panic(ErrNotImplement)
+}
+
+func (d *dbBase) IndexExists(dbQuerier, string, string) bool {
+	panic(ErrNotImplement)
+}