wangyum opened a new pull request #30559: URL: https://github.com/apache/spark/pull/30559
### What changes were proposed in this pull request? This pr make `spark.sql.files.minPartitionNum` effective for `LocalTableScan`. ### Why are the changes needed? Avoid generating small files for INSERT INTO TABLE from VALUES, for example: ```sql CREATE TABLE t1(id int) USING parquet; INSERT INTO TABLE t1 VALUES (1), (2), (3), (4), (5), (6), (7), (8); ``` Before this pr: ``` -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00000-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00001-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00002-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00003-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00004-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00005-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00006-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 421 Dec 1 01:54 part-00007-4d5a3a89-2995-4328-b2ae-908febbbaf4a-c000.snappy.parquet -rw-r--r-- 1 root root 0 Dec 1 01:54 _SUCCESS ``` After this pr and set `spark.sql.files.minPartitionNum` to 1: ``` -rw-r--r-- 1 root root 452 Dec 1 01:59 part-00000-6de50c79-e305-4f8d-b6ae-39f46b2619c6-c000.snappy.parquet -rw-r--r-- 1 root root 0 Dec 1 01:59 _SUCCESS ``` ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Unit test. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
