wangyum opened a new pull request, #37451:
URL: https://github.com/apache/spark/pull/37451
### What changes were proposed in this pull request?
This PR enhances `CoalesceShufflePartitions` to adaptive adjustment
`spark.sql.adaptive.advisoryPartitionSizeInBytes` according to the `ExpandExec`
operator that follows. For example:
```sql
SELECT
item.i_brand_id brand_id,
item.i_brand brand,
count(distinct ss_ext_sales_price),
count(distinct ss_addr_sk)
FROM store_sales, item
WHERE store_sales.ss_item_sk = item.i_item_sk
AND item.i_manufact_id = 128
GROUP BY item.i_brand, item.i_brand_id
```
### Why are the changes needed?
Improve parallelism.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Unit test.
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