Golang Table.RemoveRecord方法代碼示例

func (s *testIndexChangeSuite) checkDropWriteOnly(d *ddl, ctx context.Context, publicTbl, writeTbl table.Table) error {
	// WriteOnlyTable insert t values (8, 8)
	_, err := writeTbl.AddRecord(ctx, types.MakeDatums(8, 8))
	if err != nil {
		return errors.Trace(err)
	}

	err = checkIndexExists(ctx, publicTbl, 8, 8, true)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable update t set c2 = 7 where c1 = 8 and c2 = 8
	err = writeTbl.UpdateRecord(ctx, 8, types.MakeDatums(8, 8), types.MakeDatums(8, 7), touchedMap(writeTbl))
	if err != nil {
		return errors.Trace(err)
	}

	err = checkIndexExists(ctx, publicTbl, 7, 8, true)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable delete t where c1 = 8
	err = writeTbl.RemoveRecord(ctx, 8, types.MakeDatums(8, 7))
	if err != nil {
		return errors.Trace(err)
	}

	err = checkIndexExists(ctx, publicTbl, 7, 8, false)
	if err != nil {
		return errors.Trace(err)
	}
	return nil
}

func (s *testIndexChangeSuite) checkAddPublic(d *ddl, ctx context.Context, writeTbl, publicTbl table.Table) error {
	// WriteOnlyTable: insert t values (6, 6)
	_, err := writeTbl.AddRecord(ctx, types.MakeDatums(6, 6))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, publicTbl, 6, 6, true)
	if err != nil {
		return errors.Trace(err)
	}
	// PublicTable: insert t values (7, 7)
	_, err = publicTbl.AddRecord(ctx, types.MakeDatums(7, 7))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, publicTbl, 7, 7, true)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable: update t set c2 = 5 where c1 = 7 and c2 = 7
	err = writeTbl.UpdateRecord(ctx, 7, types.MakeDatums(7, 7), types.MakeDatums(7, 5), touchedMap(writeTbl))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, publicTbl, 5, 7, true)
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, publicTbl, 7, 7, false)
	if err != nil {
		return errors.Trace(err)
	}
	// WriteOnlyTable: delete t where c1 = 6
	err = writeTbl.RemoveRecord(ctx, 6, types.MakeDatums(6, 6))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, publicTbl, 6, 6, false)

	var rows [][]types.Datum
	publicTbl.IterRecords(ctx, publicTbl.FirstKey(), publicTbl.Cols(),
		func(h int64, data []types.Datum, cols []*table.Column) (bool, error) {
			rows = append(rows, data)
			return true, nil
		})
	if len(rows) == 0 {
		return errors.New("table is empty")
	}
	for _, row := range rows {
		idxVal := row[1].GetInt64()
		handle := row[0].GetInt64()
		err = checkIndexExists(ctx, publicTbl, idxVal, handle, true)
		if err != nil {
			return errors.Trace(err)
		}
	}
	return nil
}

func (e *DeleteExec) removeRow(ctx context.Context, t table.Table, h int64, data []types.Datum) error {
	err := t.RemoveRecord(ctx, h, data)
	if err != nil {
		return errors.Trace(err)
	}
	variable.GetSessionVars(ctx).AddAffectedRows(1)
	return nil
}

func (e *DeleteExec) removeRow(ctx context.Context, t table.Table, h int64, data []types.Datum) error {
	err := t.RemoveRecord(ctx, h, data)
	if err != nil {
		return errors.Trace(err)
	}
	getDirtyDB(ctx).deleteRow(t.Meta().ID, h)
	ctx.GetSessionVars().StmtCtx.AddAffectedRows(1)
	return nil
}

func removeRow(ctx context.Context, t table.Table, h int64, data []interface{}) error {
	err := t.RemoveRecord(ctx, h, data)
	if err != nil {
		return errors.Trace(err)
	}

	variable.GetSessionVars(ctx).AddAffectedRows(1)
	return nil
}

func (s *testColumnChangeSuite) checkAddWriteOnly(d *ddl, ctx context.Context, deleteOnlyTable, writeOnlyTable table.Table) error {
	// WriteOnlyTable: insert t values (2, 3)
	_, err := writeOnlyTable.AddRecord(ctx, types.MakeDatums(2, 3))
	if err != nil {
		return errors.Trace(err)
	}
	err = ctx.CommitTxn()
	if err != nil {
		return errors.Trace(err)
	}
	err = checkResult(ctx, writeOnlyTable, testutil.RowsWithSep(" ", "1 2 <nil>", "2 3 3"))
	if err != nil {
		return errors.Trace(err)
	}
	// DeleteOnlyTable: select * from t
	err = checkResult(ctx, deleteOnlyTable, testutil.RowsWithSep(" ", "1 2", "2 3"))
	if err != nil {
		return errors.Trace(err)
	}
	// WriteOnlyTable: update t set c1 = 2 where c1 = 1
	h, _, err := writeOnlyTable.Seek(ctx, 0)
	if err != nil {
		return errors.Trace(err)
	}
	err = writeOnlyTable.UpdateRecord(ctx, h, types.MakeDatums(1, 2), types.MakeDatums(2, 2), touchedMap(writeOnlyTable))
	if err != nil {
		return errors.Trace(err)
	}
	err = ctx.CommitTxn()
	if err != nil {
		return errors.Trace(err)
	}
	// After we update the first row, its default value is also set.
	err = checkResult(ctx, writeOnlyTable, testutil.RowsWithSep(" ", "2 2 3", "2 3 3"))
	if err != nil {
		return errors.Trace(err)
	}
	// DeleteOnlyTable: delete from t where c2 = 2
	err = deleteOnlyTable.RemoveRecord(ctx, h, types.MakeDatums(2, 2))
	if err != nil {
		return errors.Trace(err)
	}
	err = ctx.CommitTxn()
	if err != nil {
		return errors.Trace(err)
	}
	// After delete table has deleted the first row, check the WriteOnly table records.
	err = checkResult(ctx, writeOnlyTable, testutil.RowsWithSep(" ", "2 3 3"))
	return errors.Trace(err)
}

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)
//.........這裏部分代碼省略.........

func updateRecord(ctx context.Context, h int64, data []interface{}, t table.Table,
	updateColumns map[int]*expression.Assignment, evalMap map[interface{}]interface{},
	offset int, onDuplicateUpdate bool) error {
	if err := t.LockRow(ctx, h); err != nil {
		return errors.Trace(err)
	}

	cols := t.Cols()
	oldData := data
	newData := make([]interface{}, len(cols))
	touched := make(map[int]bool, len(cols))
	copy(newData, oldData)

	assignExists := false
	var newHandle interface{}
	for i, asgn := range updateColumns {
		if i < offset || i >= offset+len(cols) {
			// The assign expression is for another table, not this.
			continue
		}

		val, err := asgn.Expr.Eval(ctx, evalMap)
		if err != nil {
			return errors.Trace(err)
		}

		colIndex := i - offset
		col := cols[colIndex]
		if col.IsPKHandleColumn(t.Meta()) {
			newHandle = val
		}

		touched[colIndex] = true
		newData[colIndex] = val
		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 := column.CastValues(ctx, newData, cols); err != nil {
		return errors.Trace(err)
	}

	if err := column.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 := types.Compare(newData[i], 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 variable.GetSessionVars(ctx).ClientCapability&mysql.ClientFoundRows > 0 {
			variable.GetSessionVars(ctx).AddAffectedRows(1)
		}
		return nil
	}

	var err error
	if newHandle != nil {
		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)
	}

	// Record affected rows.
	if !onDuplicateUpdate {
		variable.GetSessionVars(ctx).AddAffectedRows(1)
	} else {
		variable.GetSessionVars(ctx).AddAffectedRows(2)

	}

	return nil
//.........這裏部分代碼省略.........

func (s *testIndexChangeSuite) checkAddWriteOnly(d *ddl, ctx context.Context, delOnlyTbl, writeOnlyTbl table.Table) error {
	// DeleteOnlyTable: insert t values (4, 4);
	_, err := delOnlyTbl.AddRecord(ctx, types.MakeDatums(4, 4))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, writeOnlyTbl, 4, 4, false)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable: insert t values (5, 5);
	_, err = writeOnlyTbl.AddRecord(ctx, types.MakeDatums(5, 5))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, writeOnlyTbl, 5, 5, true)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable: update t set c2 = 1 where c1 = 4 and c2 = 4
	err = writeOnlyTbl.UpdateRecord(ctx, 4, types.MakeDatums(4, 4), types.MakeDatums(4, 1), touchedMap(writeOnlyTbl))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, writeOnlyTbl, 1, 4, true)
	if err != nil {
		return errors.Trace(err)
	}

	// DeleteOnlyTable: update t set c2 = 3 where c1 = 4 and c2 = 1
	err = delOnlyTbl.UpdateRecord(ctx, 4, types.MakeDatums(4, 1), types.MakeDatums(4, 3), touchedMap(writeOnlyTbl))
	if err != nil {
		return errors.Trace(err)
	}
	// old value index not exists.
	err = checkIndexExists(ctx, writeOnlyTbl, 1, 4, false)
	if err != nil {
		return errors.Trace(err)
	}
	// new value index not exists.
	err = checkIndexExists(ctx, writeOnlyTbl, 3, 4, false)
	if err != nil {
		return errors.Trace(err)
	}

	// WriteOnlyTable: delete t where c1 = 4 and c2 = 3
	err = writeOnlyTbl.RemoveRecord(ctx, 4, types.MakeDatums(4, 3))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, writeOnlyTbl, 3, 4, false)
	if err != nil {
		return errors.Trace(err)
	}

	// DeleteOnlyTable: delete t where c1 = 5
	err = delOnlyTbl.RemoveRecord(ctx, 5, types.MakeDatums(5, 5))
	if err != nil {
		return errors.Trace(err)
	}
	err = checkIndexExists(ctx, writeOnlyTbl, 5, 5, false)
	if err != nil {
		return errors.Trace(err)
	}
	return nil
}