// FindOnUpdateCols finds columns have OnUpdateNow flag.
func FindOnUpdateCols(cols []*Col) []*Col {
var rcols []*Col
for _, c := range cols {
if mysql.HasOnUpdateNowFlag(c.Flag) {
rcols = append(rcols, c)
}
}
return rcols
}
// NewColDesc returns a new ColDesc for a column.
func NewColDesc(col *Col) *ColDesc {
// TODO: if we have no primary key and a unique index which's columns are all not null
// we will set these columns' flag as PriKeyFlag
// see https://dev.mysql.com/doc/refman/5.7/en/show-columns.html
// create table
name := col.Name
nullFlag := "YES"
if mysql.HasNotNullFlag(col.Flag) {
nullFlag = "NO"
}
keyFlag := ""
if mysql.HasPriKeyFlag(col.Flag) {
keyFlag = "PRI"
} else if mysql.HasUniKeyFlag(col.Flag) {
keyFlag = "UNI"
} else if mysql.HasMultipleKeyFlag(col.Flag) {
keyFlag = "MUL"
}
var defaultValue interface{}
if !mysql.HasNoDefaultValueFlag(col.Flag) {
defaultValue = col.DefaultValue
}
extra := ""
if mysql.HasAutoIncrementFlag(col.Flag) {
extra = "auto_increment"
} else if mysql.HasOnUpdateNowFlag(col.Flag) {
extra = "on update CURRENT_TIMESTAMP"
}
return &ColDesc{
Field: name.O,
Type: col.GetTypeDesc(),
Collation: col.Collate,
Null: nullFlag,
Key: keyFlag,
DefaultValue: defaultValue,
Extra: extra,
Privileges: defaultPrivileges,
Comment: "",
}
}
func (s *ShowPlan) fetchShowCreateTable(ctx context.Context) error {
tb, err := s.getTable(ctx)
if err != nil {
return errors.Trace(err)
}
// TODO: let the result more like MySQL.
var buf bytes.Buffer
buf.WriteString(fmt.Sprintf("CREATE TABLE `%s` (\n", tb.TableName().O))
for i, col := range tb.Cols() {
buf.WriteString(fmt.Sprintf(" `%s` %s", col.Name.O, col.GetTypeDesc()))
if mysql.HasAutoIncrementFlag(col.Flag) {
buf.WriteString(" NOT NULL AUTO_INCREMENT")
} else {
if mysql.HasNotNullFlag(col.Flag) {
buf.WriteString(" NOT NULL")
}
switch col.DefaultValue {
case nil:
buf.WriteString(" DEFAULT NULL")
case "CURRENT_TIMESTAMP":
buf.WriteString(" DEFAULT CURRENT_TIMESTAMP")
default:
buf.WriteString(fmt.Sprintf(" DEFAULT '%v'", col.DefaultValue))
}
if mysql.HasOnUpdateNowFlag(col.Flag) {
buf.WriteString(" ON UPDATE CURRENT_TIMESTAMP")
}
}
if i != len(tb.Cols())-1 {
buf.WriteString(",\n")
}
}
if len(tb.Indices()) > 0 {
buf.WriteString(",\n")
}
for i, idx := range tb.Indices() {
if idx.Primary {
buf.WriteString(" PRIMARY KEY ")
} else if idx.Unique {
buf.WriteString(fmt.Sprintf(" UNIQUE KEY `%s` ", idx.Name.O))
} else {
buf.WriteString(fmt.Sprintf(" KEY `%s` ", idx.Name.O))
}
cols := make([]string, 0, len(idx.Columns))
for _, c := range idx.Columns {
cols = append(cols, c.Name.O)
}
buf.WriteString(fmt.Sprintf("(`%s`)", strings.Join(cols, "`,`")))
if i != len(tb.Indices())-1 {
buf.WriteString(",\n")
}
}
buf.WriteString("\n")
buf.WriteString(") ENGINE=InnoDB")
if s := tb.Meta().Charset; len(s) > 0 {
buf.WriteString(fmt.Sprintf(" DEFAULT CHARSET=%s", s))
} else {
buf.WriteString(" DEFAULT CHARSET=latin1")
}
data := []interface{}{
tb.TableName().O,
buf.String(),
}
s.rows = append(s.rows, &plan.Row{Data: data})
return nil
}