本文整理汇总了Golang中github.com/pingcap/tidb/kv.Transaction.LockKeys方法的典型用法代码示例。如果您正苦于以下问题：Golang Transaction.LockKeys方法的具体用法？Golang Transaction.LockKeys怎么用？Golang Transaction.LockKeys使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/pingcap/tidb/kv.Transaction的用法示例。
在下文中一共展示了Transaction.LockKeys方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: backfillIndexInTxn
// 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
}示例2: writeSchemaInfo
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)
}示例3: GenID
// 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)
}示例4: verifySchemaMetaVersion
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)
}