[flink] Optimizing parallelism for fixed bucekt and non-partitioned t… #4643
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…able.
For non-partitioned table, the writerOperator's parallelism will be set to bucketNums if the bucketNums is less than inputOperator's parallelism.
Example :
Default parallelism : 4
Paimon tables bucket nums : 1
Result : There will be 3 tasks that are idle.
Before :
After :
Purpose
Linked issue: close #xxx
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