dalongliu created FLINK-38052:
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Summary: Release Testing: Verify FLIP-516: New Streaming Multi-Way
Join Operator
Key: FLINK-38052
URL: https://issues.apache.org/jira/browse/FLINK-38052
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Planner
Affects Versions: 2.1.0
Reporter: dalongliu
Fix For: 2.1.0
This issue aims to verify FLIP-516.
We now support a StreamingMultiJoinOperator that performs a join across N
tables without intermediate state. We've done some testing and observed
considerable performance and state improvements for multiple chained joins when
they record amplification.
Now we'd like to have some cross team testing to validate it. We want to cover
the following cases
* Test 1: Enable multi joins, confirm 2/3 way inner joins are supported and
produce correct results. Materialized results should be the same as binary
joins.
* Test 2: Enable multi joins, confirm 2/3 way left joins are supported and
produce correct results. Materialized results should be the same as binary
joins.
* Test 3: Enable 5, 10, 20, x-way joins with/without primary keys and confirm
output plans look good with `explain`.
* Test 4: Enable 5, 10, 20, x-way joins with/without primary keys and confirm
they run as expected - checking results' correctness here is usually
complicated and not strictly required.
Multi joins can be enabled with ??SET 'table.optimizer.multi-join.enabled' =
'true';.?? Currently, we have streaming mode support for inner and left joins.
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