wuchong opened a new pull request #8202: [FLINK-12133] [table-runtime-blink] Support unbounded aggregate in streaming table runtime URL: https://github.com/apache/flink/pull/8202 ## What is the purpose of the change This ticket is aiming to support unbounded aggregate in blink streaming runtime. Includes: 1. GroupAggFunction: function that support unbounded aggregate without minibatch optimizations 2. MiniBatchGroupAggFunction: function that support unbounded aggregate with minibatch optimization 3. MiniBatchLocalGroupAggFunction & MiniBatchGlobalGroupAggFunction: function that support unbounded aggregate with local combine optimization 4. MiniBatchIncrementalAggFunction: agg function with incremental optimization. ## Brief change log - Add `GroupAggFunction`, `MiniBatchGroupAggFunction`, `MiniBatchLocalGroupAggFunction`, `MiniBatchIncrementalAggFunction`. - Move `TableConfig`, `MapView`, `ListView` to `flink-table-runtime-blink` module to make runtime class can access them. They should be in api module at last. So this is a temporary change. - Implement Expand and Union for runtime. - Introduce `StateDataViewStore` for `AggsHandleFunction` to access state DataView instead of using `ExecutionContext` in it. - Introduce `SINGLE_VALUE` and `COLLECT` agg call. - Rewrite `MaxWithRetract`, `MinWithRetract`, `ConcatWithRetract`, `ConcatWsWithRetract`. - Fix several bugs in code generation and serialization and other places. ## Verifying this change - Add `AggregateITCase` with 6 modes to cover unbounded aggregates. - Add `SplitAggregateITCase` with 4 modes to cover distinct aggregates split optimization. ## 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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