func removeOnUpdateNowFlag(c *column.Col) {
// For timestamp Col, if it is set null or default value,
// OnUpdateNowFlag should be removed.
if mysql.HasTimestampFlag(c.Flag) {
c.Flag &= ^uint(mysql.OnUpdateNowFlag)
}
}
func setNoDefaultValueFlag(c *column.Col, hasDefaultValue bool) {
if hasDefaultValue {
return
}
if !mysql.HasNotNullFlag(c.Flag) {
return
}
// Check if it is an `AUTO_INCREMENT` field or `TIMESTAMP` field.
if !mysql.HasAutoIncrementFlag(c.Flag) && !mysql.HasTimestampFlag(c.Flag) {
c.Flag |= mysql.NoDefaultValueFlag
}
}
func setTimestampDefaultValue(c *column.Col, hasDefaultValue bool, setOnUpdateNow bool) {
if hasDefaultValue {
return
}
// For timestamp Col, if is not set default value or not set null, use current timestamp.
if mysql.HasTimestampFlag(c.Flag) && mysql.HasNotNullFlag(c.Flag) {
if setOnUpdateNow {
c.DefaultValue = expressions.ZeroTimestamp
} else {
c.DefaultValue = expressions.CurrentTimestamp
}
}
}
func (s *InsertIntoStmt) initDefaultValues(ctx context.Context, t table.Table, cols []*column.Col, row []interface{}, marked map[int]struct{}) error {
var err error
var defaultValueCols []*column.Col
for i, c := range cols {
if row[i] != nil {
// Column value is not nil, continue.
continue
}
// If the nil value is evaluated in insert list, we will use nil except auto increment column.
if _, ok := marked[i]; ok && !mysql.HasAutoIncrementFlag(c.Flag) && !mysql.HasTimestampFlag(c.Flag) {
continue
}
if mysql.HasAutoIncrementFlag(c.Flag) {
var id int64
if id, err = t.AllocAutoID(); err != nil {
return errors.Trace(err)
}
row[i] = id
variable.GetSessionVars(ctx).SetLastInsertID(uint64(id))
} else {
var value interface{}
value, _, err = getDefaultValue(ctx, c)
if err != nil {
return errors.Trace(err)
}
row[i] = value
}
defaultValueCols = append(defaultValueCols, c)
}
if err = column.CastValues(ctx, row, defaultValueCols); err != nil {
return errors.Trace(err)
}
return nil
}