Feature Description #
Vitess supports transactions through vtgate on PRIMARY and read REPLICA tablets as of v7.0.
Use Case(s) #
- Consistent reads
- Sqoop integration
Implemented Solution #
- When vtgate chooses a tablet to execute a query on, it will return the tablet alias.
- The tablet alias and transactionID is then stored on the shard session struct.
- If the session object has a tablet alias set, then the query will target the specific tablet.
- If the transaction is committed or rolled back, the session will end.
In order to use this feature, a client will need to issue
use @replica followed by