swuferhong opened a new pull request, #20462:
URL: https://github.com/apache/flink/pull/20462
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## What is the purpose of the change
This pr is a part of FLIP-248,
[https://cwiki.apache.org/confluence/display/FLINK/FLIP-248%3A+Introduce+dynamic+partition+pruning](url).
In this pr, we try to adjust join cost for dpp query pattern to reorder join
order to make fact table adjacent to dim table directly. For example, for
query `Select * from fact_table, sales, items, dim_table where
fact_table.fact_partition_key = dim_table.dim_date_key and xxx and
dim_table.price > 100` , it meets the dpp's requirements, but `fact_table` is
not adjacent to `dim_table`. So we try to change the join order to make fact
table adjacent to dim table directly.
## Brief change log
- Adding util class `DynamicPartitionPruningUtils`, which include methods
for judging whether one join meets dpp pattern, and abstract some util methods
`DynamicPartitionPruningRule` and DPP factor both used.
- In `FlinkRelMdRowCount`, adding adjust join cost logical while join meets
dpp pattern.
- Adding dpp factor related plan tests in `DynamicPartitionPruningRuleTest`.
## Verifying this change
- Adding dpp factor related plan tests in `DynamicPartitionPruningRuleTest`.
Include basic test and test while join key (partition key) changed in dim side.
## 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, Kubernetes/Yarn, 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? now don't have docs
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