Kent Yao d640631e36 [SPARK-34164][SQL] Improve write side varchar check to visit only last few tailing spaces ... ### What changes were proposed in this pull request? For varchar(N), we currently trim all spaces first to check whether the remained length exceeds, it not necessary to visit them all but at most to those after N. ### Why are the changes needed? improve varchar performance for write side ### Does this PR introduce _any_ user-facing change? no ### How was this patch tested? benchmark and existing ut Closes #31253 from yaooqinn/SPARK-34164. Authored-by: Kent Yao <yao@apache.org> Signed-off-by: Wenchen Fan <wenchen@databricks.com>		2021-01-21 05:30:57 +00:00
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kvstore	[SPARK-33662][BUILD] Setting version to 3.2.0-SNAPSHOT	2020-12-04 14:10:42 -08:00
network-common	[SPARK-32917][SHUFFLE][CORE] Adds support for executors to push shuffle blocks after successful map task completion	2021-01-08 12:21:56 -06:00
network-shuffle	[SPARK-32916][SHUFFLE][TEST-MAVEN][TEST-HADOOP2.7] Ensure the number of chunks in meta file and index file are equal	2020-12-23 12:42:18 -06:00
network-yarn	[SPARK-33212][BUILD] Upgrade to Hadoop 3.2.2 and move to shaded clients for Hadoop 3.x profile	2021-01-15 14:06:50 -08:00
sketch	[SPARK-33662][BUILD] Setting version to 3.2.0-SNAPSHOT	2020-12-04 14:10:42 -08:00
tags	[SPARK-33662][BUILD] Setting version to 3.2.0-SNAPSHOT	2020-12-04 14:10:42 -08:00
unsafe	[SPARK-34164][SQL] Improve write side varchar check to visit only last few tailing spaces	2021-01-21 05:30:57 +00:00