zjuwangg opened a new pull request #10201: [FLINK-14687]Add database related ddl support to SQL Parser URL: https://github.com/apache/flink/pull/10201 ## What is the purpose of the change According to FLIP-69, we should introduce such following DDLs related to the database in the sql parser. 1. createDatabaseStatement: CREATE DATABASE [ IF NOT EXISTS ] [ catalogName.] dataBaseName [ COMMENT database_comment ] [WITH ( name=value [, name=value]*)] 2. dropDatabaseStatement: DROP DATABASE [ IF EXISTS ] [ catalogName.] dataBaseName [ (RESTRICT|CASCADE)] 3. alterDatabaseStatement: ALTER DATABASE [ catalogName.] dataBaseName SET ( name=value [, name=value]*) 4. useDatabaseStatement: USE [ catalogName.] dataBaseName 5. showDatabasesStatement: SHOW DATABASES 6. descDatabaseStatement: DESCRIBE DATABASE [ EXTENDED] [ catalogName.] dataBasesName ## Brief change log - [c9b2309](https://github.com/apache/flink/commit/c9b2309a888bb05db2fcf126c89b8b4623a9976a)Add show databases parser support - [6afcc4d](https://github.com/apache/flink/commit/6afcc4d58a09b663524bbf4d353082f3ed7122db)add use database support in parser - [0eb9dba](https://github.com/apache/flink/commit/0eb9dba5f221514e7d8d81d07ff5faa4b2bd76b9)add creata database support in parser - [86f418b](https://github.com/apache/flink/commit/86f418b942a4bad069597f8f2d6d8875edb7ab43)add drop database support in parser - [210ce6a](https://github.com/apache/flink/commit/210ce6a12d00f458851c7c4e4fc63ad72ffebae1)add alter database support in parser - [f513a1d](https://github.com/apache/flink/commit/f513a1dd566673c9c60e2bab0259f82ea14fb2c4)add describe database support in parser ## Verifying this change This change added tests and can be verified as follows: - *FlinkSqlParserImplTest#testShowDataBases* - *FlinkSqlParserImplTest#testUseDataBase* - *FlinkSqlParserImplTest#testCreateDatabase* - *FlinkSqlParserImplTest#testDropDatabase* - *FlinkSqlParserImplTest#testAlterDatabase* - *FlinkSqlParserImplTest#testAlterDatabase* ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): (no) - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no) - The serializers: (no) - The runtime per-record code paths (performance sensitive): ( no ) - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (no) - The S3 file system connector: ( no) ## Documentation - Does this pull request introduce a new feature? (yes ) - If yes, how is the feature documented? (not applicable)
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