Пример #1
0
// parsePkTuple parese one pk tuple.
func parsePkTuple(tokenizer *sqlparser.Tokenizer) (tuple sqlparser.ValTuple, err error) {
	// start scanning the list
	for typ, val := tokenizer.Scan(); typ != ')'; typ, val = tokenizer.Scan() {
		switch typ {
		case '-':
			// handle negative numbers
			typ2, val2 := tokenizer.Scan()
			if typ2 != sqlparser.NUMBER {
				return nil, fmt.Errorf("expecing number after '-'")
			}
			num := append(sqlparser.NumVal("-"), val2...)
			tuple = append(tuple, num)
		case sqlparser.NUMBER:
			tuple = append(tuple, sqlparser.NumVal(val))
		case sqlparser.NULL:
			tuple = append(tuple, new(sqlparser.NullVal))
		case sqlparser.STRING:
			decoded := make([]byte, base64.StdEncoding.DecodedLen(len(val)))
			numDecoded, err := base64.StdEncoding.Decode(decoded, val)
			if err != nil {
				return nil, err
			}
			tuple = append(tuple, sqlparser.StrVal(decoded[:numDecoded]))
		default:
			return nil, fmt.Errorf("syntax error at position: %d", tokenizer.Position)
		}
	}
	return tuple, nil
}
Пример #2
0
func parsePkNames(tokenizer *sqlparser.Tokenizer) (columns []string, err error) {
	if typ, _ := tokenizer.Scan(); typ != '(' {
		return nil, fmt.Errorf("expecting '('")
	}
	for typ, val := tokenizer.Scan(); typ != ')'; typ, val = tokenizer.Scan() {
		switch typ {
		case sqlparser.ID:
			columns = append(columns, string(val))
		default:
			return nil, fmt.Errorf("syntax error at position: %d", tokenizer.Position)
		}
	}
	return columns, nil
}