SteNicholas opened a new pull request #15282:
URL: https://github.com/apache/flink/pull/15282
## What is the purpose of the change
*Currently we have discussed the grammar about multi-line statements as
follows:*
```
BEGIN STATEMENT SET;
INSERT INTO ... SELECT ...;
INSERT INTO ... SELECT ...;
END;
```
*`SqlParser` should support `STATEMENT SET` syntax in `TableEnvironment`.*
## Brief change log
- *Add `SqlStatementSet` to support `STATEMENT SET` syntax for
`SqlParser`.*
## Verifying this change
- *`FlinkSqlParserImplTest` adds `testStatementSetWithSingleInsertInto`,
`testStatementSetWithMultiInsertInto`, `testStatementSetWithoutInsertInto` and
`testStatementSetWithCreateTable` to verify whether `SqlParser` supports the
`STATEMENT SET` syntax.*
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / **no** /
don't know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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