Golang mysql.HasAutoIncrementFlag函数代码示例

func (s *InsertValues) initDefaultValues(ctx context.Context, t table.Table, row []interface{}, marked map[int]struct{}) error {
	var defaultValueCols []*column.Col
	for i, c := range t.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) {
			recordID, err := t.AllocAutoID()
			if err != nil {
				return errors.Trace(err)
			}
			row[i] = recordID
			if c.IsPKHandleColumn(t.Meta()) {
				// Notes: incompatible with mysql
				// MySQL will set last insert id to the first row, as follows:
				// `t(id int AUTO_INCREMENT, c1 int, PRIMARY KEY (id))`
				// `insert t (c1) values(1),(2),(3);`
				// Last insert id will be 1, not 3.
				variable.GetSessionVars(ctx).SetLastInsertID(uint64(recordID))
			}
		} else {
			var value interface{}
			value, _, err := tables.GetColDefaultValue(ctx, &c.ColumnInfo)
			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
}

// String implements fmt.Stringer interface.
func (c *Column) String() string {
	ans := []string{c.Name.O, types.TypeToStr(c.Tp, c.Charset)}
	if mysql.HasAutoIncrementFlag(c.Flag) {
		ans = append(ans, "AUTO_INCREMENT")
	}
	if mysql.HasNotNullFlag(c.Flag) {
		ans = append(ans, "NOT NULL")
	}
	return strings.Join(ans, " ")
}

func (s *InsertValues) initDefaultValues(ctx context.Context, t table.Table, row []interface{}, marked map[int]struct{}) error {
	var err error
	var defaultValueCols []*column.Col
	for i, c := range t.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
}

func setNoDefaultValueFlag(c *table.Column, 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 (s *InsertValues) initDefaultValues(ctx context.Context, t table.Table, row []interface{}, marked map[int]struct{}) (recordID int64, err error) {
	var defaultValueCols []*column.Col
	for i, c := range t.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) {
			if recordID, err = t.AllocAutoID(); err != nil {
				return 0, errors.Trace(err)
			}
			row[i] = recordID
		} else {
			var value interface{}
			value, _, err = tables.GetColDefaultValue(ctx, &c.ColumnInfo)
			if err != nil {
				return 0, errors.Trace(err)
			}

			row[i] = value
		}

		defaultValueCols = append(defaultValueCols, c)
	}

	if err = column.CastValues(ctx, row, defaultValueCols); err != nil {
		return 0, errors.Trace(err)
	}

	return
}

// NewColDesc returns a new ColDesc for a column.
func NewColDesc(col *Column) *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 (e *InsertValues) initDefaultValues(row []types.Datum, marked map[int]struct{}, ignoreErr bool) error {
	var defaultValueCols []*table.Column
	sc := e.ctx.GetSessionVars().StmtCtx
	for i, c := range e.Table.Cols() {
		// It's used for retry.
		if mysql.HasAutoIncrementFlag(c.Flag) && row[i].IsNull() &&
			e.ctx.GetSessionVars().RetryInfo.Retrying {
			id, err := e.ctx.GetSessionVars().RetryInfo.GetCurrAutoIncrementID()
			if err != nil {
				return errors.Trace(err)
			}
			row[i].SetInt64(id)
		}
		if !row[i].IsNull() {
			// Column value isn't nil and column isn't auto-increment, continue.
			if !mysql.HasAutoIncrementFlag(c.Flag) {
				continue
			}
			val, err := row[i].ToInt64(sc)
			if filterErr(errors.Trace(err), ignoreErr) != nil {
				return errors.Trace(err)
			}
			row[i].SetInt64(val)
			if val != 0 {
				e.Table.RebaseAutoID(val, true)
				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) {
			recordID, err := e.Table.AllocAutoID()
			if err != nil {
				return errors.Trace(err)
			}
			row[i].SetInt64(recordID)
			// It's compatible with mysql. So it sets last insert id to the first row.
			if e.currRow == 0 {
				e.lastInsertID = uint64(recordID)
			}
			// It's used for retry.
			if !e.ctx.GetSessionVars().RetryInfo.Retrying {
				e.ctx.GetSessionVars().RetryInfo.AddAutoIncrementID(recordID)
			}
		} else {
			var err error
			row[i], _, err = table.GetColDefaultValue(e.ctx, c.ToInfo())
			if filterErr(err, ignoreErr) != nil {
				return errors.Trace(err)
			}
		}

		defaultValueCols = append(defaultValueCols, c)
	}
	if err := table.CastValues(e.ctx, row, defaultValueCols, ignoreErr); err != nil {
		return errors.Trace(err)
	}

	return nil
}

func updateRecord(ctx context.Context, h int64, oldData, newData []types.Datum, assignFlag []bool, t table.Table, offset int, onDuplicateUpdate bool) error {
	cols := t.Cols()
	touched := make(map[int]bool, len(cols))
	assignExists := false
	sc := ctx.GetSessionVars().StmtCtx
	var newHandle types.Datum
	for i, hasSetExpr := range assignFlag {
		if !hasSetExpr {
			if onDuplicateUpdate {
				newData[i] = oldData[i]
			}
			continue
		}
		if i < offset || i >= offset+len(cols) {
			// The assign expression is for another table, not this.
			continue
		}

		colIndex := i - offset
		col := cols[colIndex]
		if col.IsPKHandleColumn(t.Meta()) {
			newHandle = newData[i]
		}
		if mysql.HasAutoIncrementFlag(col.Flag) {
			if newData[i].IsNull() {
				return errors.Errorf("Column '%v' cannot be null", col.Name.O)
			}
			val, err := newData[i].ToInt64(sc)
			if err != nil {
				return errors.Trace(err)
			}
			t.RebaseAutoID(val, true)
		}

		touched[colIndex] = true
		assignExists = true
	}

	// If no assign list for this table, no need to update.
	if !assignExists {
		return nil
	}

	// Check whether new value is valid.
	if err := table.CastValues(ctx, newData, cols, false); err != nil {
		return errors.Trace(err)
	}

	if err := table.CheckNotNull(cols, newData); err != nil {
		return errors.Trace(err)
	}

	// If row is not changed, we should do nothing.
	rowChanged := false
	for i := range oldData {
		if !touched[i] {
			continue
		}

		n, err := newData[i].CompareDatum(sc, oldData[i])
		if err != nil {
			return errors.Trace(err)
		}
		if n != 0 {
			rowChanged = true
			break
		}
	}
	if !rowChanged {
		// See https://dev.mysql.com/doc/refman/5.7/en/mysql-real-connect.html  CLIENT_FOUND_ROWS
		if ctx.GetSessionVars().ClientCapability&mysql.ClientFoundRows > 0 {
			sc.AddAffectedRows(1)
		}
		return nil
	}

	var err error
	if !newHandle.IsNull() {
		err = t.RemoveRecord(ctx, h, oldData)
		if err != nil {
			return errors.Trace(err)
		}
		_, err = t.AddRecord(ctx, newData)
	} else {
		// Update record to new value and update index.
		err = t.UpdateRecord(ctx, h, oldData, newData, touched)
	}
	if err != nil {
		return errors.Trace(err)
	}
	dirtyDB := getDirtyDB(ctx)
	tid := t.Meta().ID
	dirtyDB.deleteRow(tid, h)
	dirtyDB.addRow(tid, h, newData)

	// Record affected rows.
	if !onDuplicateUpdate {
		sc.AddAffectedRows(1)
	} else {
		sc.AddAffectedRows(2)
//.........这里部分代码省略.........

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
}

func (e *ShowExec) fetchShowCreateTable() error {
	tb, err := e.getTable()
	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.Meta().Name.O))
	var pkCol *table.Column
	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")
			}
			if !mysql.HasNoDefaultValueFlag(col.Flag) {
				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 len(col.Comment) > 0 {
			buf.WriteString(fmt.Sprintf(" COMMENT '%s'", col.Comment))
		}
		if i != len(tb.Cols())-1 {
			buf.WriteString(",\n")
		}
		if tb.Meta().PKIsHandle && mysql.HasPriKeyFlag(col.Flag) {
			pkCol = col
		}
	}

	if pkCol != nil {
		// If PKIsHanle, pk info is not in tb.Indices(). We should handle it here.
		buf.WriteString(",\n")
		buf.WriteString(fmt.Sprintf(" PRIMARY KEY (`%s`)", pkCol.Name.O))
	}

	if len(tb.Indices()) > 0 || len(tb.Meta().ForeignKeys) > 0 {
		buf.WriteString(",\n")
	}

	for i, idx := range tb.Indices() {
		idxInfo := idx.Meta()
		if idxInfo.Primary {
			buf.WriteString("  PRIMARY KEY ")
		} else if idxInfo.Unique {
			buf.WriteString(fmt.Sprintf("  UNIQUE KEY `%s` ", idxInfo.Name.O))
		} else {
			buf.WriteString(fmt.Sprintf("  KEY `%s` ", idxInfo.Name.O))
		}

		cols := make([]string, 0, len(idxInfo.Columns))
		for _, c := range idxInfo.Columns {
			cols = append(cols, c.Name.O)
		}
		buf.WriteString(fmt.Sprintf("(`%s`)", strings.Join(cols, "`,`")))
		if i != len(tb.Indices())-1 {
			buf.WriteString(",\n")
		}
	}

	if len(tb.Indices()) > 0 && len(tb.Meta().ForeignKeys) > 0 {
		buf.WriteString(",\n")
	}

	for _, fk := range tb.Meta().ForeignKeys {
		if fk.State != model.StatePublic {
			continue
		}

		cols := make([]string, 0, len(fk.Cols))
		for _, c := range fk.Cols {
			cols = append(cols, c.O)
		}

		refCols := make([]string, 0, len(fk.RefCols))
		for _, c := range fk.Cols {
			refCols = append(refCols, c.O)
		}

		buf.WriteString(fmt.Sprintf("  CONSTRAINT `%s` FOREIGN KEY (`%s`)", fk.Name.O, strings.Join(cols, "`,`")))
		buf.WriteString(fmt.Sprintf(" REFERENCES `%s` (`%s`)", fk.RefTable.O, strings.Join(refCols, "`,`")))

		if ast.ReferOptionType(fk.OnDelete) != ast.ReferOptionNoOption {
			buf.WriteString(fmt.Sprintf(" ON DELETE %s", ast.ReferOptionType(fk.OnDelete)))
		}

		if ast.ReferOptionType(fk.OnUpdate) != ast.ReferOptionNoOption {
//.........这里部分代码省略.........

func (e *InsertValues) initDefaultValues(row []types.Datum, marked map[int]struct{}) error {
	var defaultValueCols []*column.Col
	for i, c := range e.Table.Cols() {
		// It's used for retry.
		if mysql.HasAutoIncrementFlag(c.Flag) && row[i].Kind() == types.KindNull &&
			variable.GetSessionVars(e.ctx).RetryInfo.Retrying {
			id, err := variable.GetSessionVars(e.ctx).RetryInfo.GetCurrAutoIncrementID()
			if err != nil {
				return errors.Trace(err)
			}
			row[i].SetInt64(id)
		}
		if row[i].Kind() != types.KindNull {
			// Column value isn't nil and column isn't auto-increment, continue.
			if !mysql.HasAutoIncrementFlag(c.Flag) {
				continue
			}
			val, err := row[i].ToInt64()
			if err != nil {
				return errors.Trace(err)
			}
			if val != 0 {
				e.Table.RebaseAutoID(val, true)
				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) {
			recordID, err := e.Table.AllocAutoID()
			if err != nil {
				return errors.Trace(err)
			}
			row[i].SetInt64(recordID)
			// Notes: incompatible with mysql
			// MySQL will set last insert id to the first row, as follows:
			// `t(id int AUTO_INCREMENT, c1 int, PRIMARY KEY (id))`
			// `insert t (c1) values(1),(2),(3);`
			// Last insert id will be 1, not 3.
			variable.GetSessionVars(e.ctx).SetLastInsertID(uint64(recordID))
			// It's used for retry.
			if !variable.GetSessionVars(e.ctx).RetryInfo.Retrying {
				variable.GetSessionVars(e.ctx).RetryInfo.AddAutoIncrementID(recordID)
			}
		} else {
			var err error
			row[i], _, err = table.GetColDefaultValue(e.ctx, &c.ColumnInfo)
			if err != nil {
				return errors.Trace(err)
			}
		}

		defaultValueCols = append(defaultValueCols, c)
	}
	if err := column.CastValues(e.ctx, row, defaultValueCols); err != nil {
		return errors.Trace(err)
	}

	return nil
}