Beispiel #1
0
func validateValue(col *schema.TableColumn, value sqltypes.Value) error {
	if value.IsNull() {
		return nil
	}
	switch col.Category {
	case schema.CAT_NUMBER:
		if !value.IsNumeric() {
			return NewTabletError(FAIL, "type mismatch, expecting numeric type for %v", value)
		}
	case schema.CAT_VARBINARY:
		if !value.IsString() {
			return NewTabletError(FAIL, "type mismatch, expecting string type for %v", value)
		}
	}
	return nil
}
Beispiel #2
0
// getWhereClause returns a whereClause based on desired upper and lower
// bounds for primary key.
func (qs *QuerySplitter) getWhereClause(start, end sqltypes.Value) *sqlparser.Where {
	var startClause *sqlparser.ComparisonExpr
	var endClause *sqlparser.ComparisonExpr
	var clauses sqlparser.BoolExpr
	// No upper or lower bound, just return the where clause of original query
	if start.IsNull() && end.IsNull() {
		return qs.sel.Where
	}
	pk := &sqlparser.ColName{
		Name: []byte(qs.pkCol),
	}
	// pkCol >= start
	if !start.IsNull() {
		startClause = &sqlparser.ComparisonExpr{
			Operator: sqlparser.AST_GE,
			Left:     pk,
			Right:    sqlparser.NumVal((start).Raw()),
		}
	}
	// pkCol < end
	if !end.IsNull() {
		endClause = &sqlparser.ComparisonExpr{
			Operator: sqlparser.AST_LT,
			Left:     pk,
			Right:    sqlparser.NumVal((end).Raw()),
		}
	}
	if startClause == nil {
		clauses = endClause
	} else {
		if endClause == nil {
			clauses = startClause
		} else {
			// pkCol >= start AND pkCol < end
			clauses = &sqlparser.AndExpr{
				Left:  startClause,
				Right: endClause,
			}
		}
	}
	if qs.sel.Where != nil {
		clauses = &sqlparser.AndExpr{
			Left:  qs.sel.Where.Expr,
			Right: clauses,
		}
	}
	return &sqlparser.Where{
		Type: sqlparser.AST_WHERE,
		Expr: clauses,
	}
}
Beispiel #3
0
// Convert takes a type and a value, and returns the type:
// - nil for NULL value
// - int64 if possible, otherwise, uint64
// - float64 for floating point values that fit in a float
// - []byte for everything else
func Convert(mysqlType int64, val sqltypes.Value) (interface{}, error) {
	if val.IsNull() {
		return nil, nil
	}

	switch mysqlType {
	case VT_TINY, VT_SHORT, VT_LONG, VT_LONGLONG, VT_INT24:
		val := val.String()
		signed, err := strconv.ParseInt(val, 0, 64)
		if err == nil {
			return signed, nil
		}
		unsigned, err := strconv.ParseUint(val, 0, 64)
		if err == nil {
			return unsigned, nil
		}
		return nil, err
	case VT_FLOAT, VT_DOUBLE:
		return strconv.ParseFloat(val.String(), 64)
	}
	return val.Raw(), nil
}
Beispiel #4
0
func (ta *Table) AddColumn(name string, columnType string, defval sqltypes.Value, extra string) {
	index := len(ta.Columns)
	ta.Columns = append(ta.Columns, TableColumn{Name: name})
	if strings.Contains(columnType, "int") {
		ta.Columns[index].Category = CAT_NUMBER
	} else if strings.HasPrefix(columnType, "varbinary") {
		ta.Columns[index].Category = CAT_VARBINARY
	} else {
		ta.Columns[index].Category = CAT_OTHER
	}
	if extra == "auto_increment" {
		ta.Columns[index].IsAuto = true
		// Ignore default value, if any
		return
	}
	if defval.IsNull() {
		return
	}
	if ta.Columns[index].Category == CAT_NUMBER {
		ta.Columns[index].Default = sqltypes.MakeNumeric(defval.Raw())
	} else {
		ta.Columns[index].Default = sqltypes.MakeString(defval.Raw())
	}
}