beyond1920 opened a new pull request #9316: [FLINK-13529][table-planner-blink] Verify and correct agg function's semantic for Blink planner URL: https://github.com/apache/flink/pull/9316 ## What is the purpose of the change Verify and correct agg function's semantic for Blink planner ## Brief change log - Refactor current ConcatAgg based on ANSI-SQL standard, including: * Rename concat_agg to ListAgg * replace default separator value from '\n' to ',' * Exchange first parameter and second parameter position when there are two parameters. * Update effected UT and IT - Refactor first_value/last_value to remove second parameter. - Remove agg function APPROX_COUNT_DISTINCT, INCR_SUM in Blink planner: ## Verifying this change existed UT and IT ## 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? no - If yes, how is the feature documented? not applicable
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