func mustNotGet(c *C, txn kv.Transaction) {
for i := startIndex; i < testCount; i++ {
s := encodeInt(i * indexStep)
_, err := txn.Get(s)
c.Assert(err, NotNil)
}
}
func fetchRowColVals(txn kv.Transaction, t table.Table, handle int64, indexInfo *model.IndexInfo) (
kv.Key, []types.Datum, error) {
// fetch datas
cols := t.Cols()
colMap := make(map[int64]*types.FieldType)
for _, v := range indexInfo.Columns {
col := cols[v.Offset]
colMap[col.ID] = &col.FieldType
}
rowKey := tablecodec.EncodeRecordKey(t.RecordPrefix(), handle)
rowVal, err := txn.Get(rowKey)
if err != nil {
return nil, nil, errors.Trace(err)
}
row, err := tablecodec.DecodeRow(rowVal, colMap)
if err != nil {
return nil, nil, errors.Trace(err)
}
vals := make([]types.Datum, 0, len(indexInfo.Columns))
for _, v := range indexInfo.Columns {
col := cols[v.Offset]
vals = append(vals, row[col.ID])
}
return rowKey, vals, nil
}
func mustGet(c *C, txn kv.Transaction) {
for i := startIndex; i < testCount; i++ {
s := encodeInt(i * indexStep)
val, err := txn.Get(s)
c.Assert(err, IsNil)
c.Assert(string(val), Equals, string(s))
}
}
func checkRowExist(txn kv.Transaction, t table.Table, handle int64) (bool, error) {
_, err := txn.Get(t.RecordKey(handle, nil))
if terror.ErrorEqual(err, kv.ErrNotExist) {
// If row doesn't exist, we may have deleted the row already,
// no need to add index again.
return false, nil
} else if err != nil {
return false, errors.Trace(err)
}
return true, nil
}
// backfillColumnInTxn deals with a part of backfilling column data in a Transaction.
// This part of the column data rows is defaultSmallBatchCnt.
func (d *ddl) backfillColumnInTxn(t table.Table, colID int64, handles []int64, colMap map[int64]*types.FieldType,
defaultVal types.Datum, txn kv.Transaction) (int64, error) {
nextHandle := handles[0]
for _, handle := range handles {
log.Debug("[ddl] backfill column...", handle)
rowKey := t.RecordKey(handle)
rowVal, err := txn.Get(rowKey)
if terror.ErrorEqual(err, kv.ErrNotExist) {
// If row doesn't exist, skip it.
continue
}
if err != nil {
return 0, errors.Trace(err)
}
rowColumns, err := tablecodec.DecodeRow(rowVal, colMap)
if err != nil {
return 0, errors.Trace(err)
}
if _, ok := rowColumns[colID]; ok {
// The column is already added by update or insert statement, skip it.
continue
}
newColumnIDs := make([]int64, 0, len(rowColumns)+1)
newRow := make([]types.Datum, 0, len(rowColumns)+1)
for colID, val := range rowColumns {
newColumnIDs = append(newColumnIDs, colID)
newRow = append(newRow, val)
}
newColumnIDs = append(newColumnIDs, colID)
newRow = append(newRow, defaultVal)
newRowVal, err := tablecodec.EncodeRow(newRow, newColumnIDs)
if err != nil {
return 0, errors.Trace(err)
}
err = txn.Set(rowKey, newRowVal)
if err != nil {
return 0, errors.Trace(err)
}
}
return nextHandle, nil
}
func fetchRowColVals(txn kv.Transaction, t table.Table, handle int64, indexInfo *model.IndexInfo) ([]types.Datum, error) {
// fetch datas
cols := t.Cols()
vals := make([]types.Datum, 0, len(indexInfo.Columns))
for _, v := range indexInfo.Columns {
col := cols[v.Offset]
k := t.RecordKey(handle, col)
data, err := txn.Get(k)
if err != nil {
return nil, errors.Trace(err)
}
val, err := tables.DecodeValue(data, &col.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
vals = append(vals, val)
}
return vals, nil
}
func fetchRowColVals(txn kv.Transaction, t table.Table, handle int64, indexInfo *model.IndexInfo) ([]interface{}, error) {
// fetch datas
cols := t.Cols()
var vals []interface{}
for _, v := range indexInfo.Columns {
var val interface{}
col := cols[v.Offset]
k := t.RecordKey(handle, col)
data, err := txn.Get(k)
if err != nil {
return nil, errors.Trace(err)
}
val, err = t.DecodeValue(data, col)
if err != nil {
return nil, errors.Trace(err)
}
vals = append(vals, val)
}
return vals, nil
}
func fetchRowColVals(txn kv.Transaction, t table.Table, handle int64, indexInfo *model.IndexInfo) ([]types.Datum, error) {
// fetch datas
cols := t.Cols()
vals := make([]types.Datum, 0, len(indexInfo.Columns))
for _, v := range indexInfo.Columns {
col := cols[v.Offset]
k := t.RecordKey(handle, col)
data, err := txn.Get(k)
if err != nil {
if terror.ErrorEqual(err, kv.ErrNotExist) && !mysql.HasNotNullFlag(col.Flag) {
vals = append(vals, types.Datum{})
continue
}
return nil, errors.Trace(err)
}
val, err := tables.DecodeValue(data, &col.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
vals = append(vals, val)
}
return vals, nil
}