Esempio n. 1
0
// backfillIndexInTxn deals with a part of backfilling index data in a Transaction.
// This part of the index data rows is defaultSmallBatchCnt.
func (d *ddl) backfillIndexInTxn(t table.Table, kvIdx table.Index, handles []int64, txn kv.Transaction) (int64, error) {
	idxRecords, err := d.fetchRowColVals(txn, t, handles, kvIdx.Meta())
	if err != nil {
		return 0, errors.Trace(err)
	}

	for _, idxRecord := range idxRecords {
		log.Debug("[ddl] backfill index...", idxRecord.handle)
		err = txn.LockKeys(idxRecord.key)
		if err != nil {
			return 0, errors.Trace(err)
		}

		// Create the index.
		handle, err := kvIdx.Create(txn, idxRecord.vals, idxRecord.handle)
		if err != nil {
			if terror.ErrorEqual(err, kv.ErrKeyExists) && idxRecord.handle == handle {
				// Index already exists, skip it.
				continue
			}
			return 0, errors.Trace(err)
		}
	}
	return idxRecords[len(idxRecords)-1].handle, nil
}
Esempio n. 2
0
File: ddl.go Progetto: H0bby/tidb
func (d *ddl) writeSchemaInfo(info *model.DBInfo, txn kv.Transaction) error {
	var b []byte
	b, err := json.Marshal(info)
	if err != nil {
		return errors.Trace(err)
	}
	key := []byte(meta.DBMetaKey(info.ID))
	if err := txn.LockKeys(key); err != nil {
		return errors.Trace(err)
	}
	txn.Set(key, b)
	log.Warn("save schema", string(b))

	return errors.Trace(err)
}
Esempio n. 3
0
// GenID adds step to the value for key and returns the sum.
func GenID(txn kv.Transaction, key []byte, step int) (int64, error) {
	if len(key) == 0 {
		return 0, errors.New("Invalid key")
	}
	err := txn.LockKeys(key)
	if err != nil {
		return 0, err
	}
	id, err := txn.Inc(key, int64(step))
	if err != nil {
		return 0, errors.Trace(err)
	}

	return id, errors.Trace(err)
}
Esempio n. 4
0
File: ddl.go Progetto: H0bby/tidb
func (d *ddl) verifySchemaMetaVersion(txn kv.Transaction, schemaMetaVersion int64) error {
	curVer, err := txn.GetInt64(meta.SchemaMetaVersionKey)
	if err != nil {
		return errors.Trace(err)
	}
	if curVer != schemaMetaVersion {
		return errors.Errorf("Schema changed, our version %d, but got %d", schemaMetaVersion, curVer)
	}

	// Increment version.
	_, err = txn.Inc(meta.SchemaMetaVersionKey, 1)
	if err != nil {
		return errors.Trace(err)
	}

	if err := txn.LockKeys(meta.SchemaMetaVersionKey); err != nil {
		return errors.Trace(err)
	}
	return errors.Trace(err)
}