Exemplo n.º 1
0
func lockRow(txn kv.Transaction, t table.Table, h int64) error {
	// Get row lock key
	lockKey := t.RecordKey(h, nil)
	// set row lock key to current txn
	err := txn.Set(lockKey, []byte(txn.String()))
	return errors.Trace(err)
}
Exemplo n.º 2
0
func setRow(txn kv.Transaction, handle int64, tbl *simpleTableInfo, gen genValueFunc) error {
	rowKey := tablecodec.EncodeRowKey(tbl.tID, codec.EncodeInt(nil, handle))
	txn.Set(rowKey, []byte(txn.String()))
	columnValues := gen(handle, tbl)
	for i, v := range columnValues {
		cKey, cVal, err := encodeColumnKV(tbl.tID, handle, tbl.cIDs[i], v)
		if err != nil {
			return errors.Trace(err)
		}
		err = txn.Set(cKey, cVal)
		if err != nil {
			return errors.Trace(err)
		}
	}
	for i, idxCol := range tbl.indices {
		idxVal := columnValues[idxCol]
		encoded, err := codec.EncodeKey(nil, idxVal, types.NewDatum(handle))
		if err != nil {
			return errors.Trace(err)
		}
		idxKey := tablecodec.EncodeIndexSeekKey(tbl.tID, tbl.iIDs[i], encoded)
		err = txn.Set(idxKey, []byte{0})
		if err != nil {
			return errors.Trace(err)
		}
	}
	return nil
}