ulysses-you 055124a048 [SPARK-34150][SQL] Strip Null literal.sql in resolve alias ... ### What changes were proposed in this pull request? Change null Literal to PrettyAttribute during ResolveAlias. ### Why are the changes needed? We will convert `Literal(null)` to target data type during analysis. Then the generated alias name will include something like `CAST(NULL AS String)` instead of `NULL`. ``` spark.sql("SELECT RAND(null)").columns -- before rand(CAST(NULL AS INT)) -- after rand(NULL) ``` ### Does this PR introduce _any_ user-facing change? Yes, the default column name maybe changed. ### How was this patch tested? Add test and pass exists test. Closes #31233 from ulysses-you/SPARK-34150. Authored-by: ulysses-you <ulyssesyou18@gmail.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com>		2021-01-19 03:35:08 +00:00
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benchmarks	[SPARK-33523][SQL][TEST][FOLLOWUP] Fix benchmark case name in SubExprEliminationBenchmark	2020-11-25 15:22:47 -08:00
src	[SPARK-34150][SQL] Strip Null literal.sql in resolve alias	2021-01-19 03:35:08 +00:00
pom.xml	[SPARK-33662][BUILD] Setting version to 3.2.0-SNAPSHOT	2020-12-04 14:10:42 -08:00