[jira] [Commented] (SPARK-33847) Replace None of elseValue inside CaseWhen if all branches are FalseLiteral

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-33847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17252144#comment-17252144 ] 

Apache Spark commented on SPARK-33847:
--------------------------------------

User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/30852

> Replace None of elseValue inside CaseWhen if all branches are FalseLiteral
> --------------------------------------------------------------------------
>
>                 Key: SPARK-33847
>                 URL: https://issues.apache.org/jira/browse/SPARK-33847
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.2.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> {code:scala}
> spark.sql("create table t1 using parquet as select id from range(10)")
> spark.sql("select id from t1 where (CASE WHEN id = 1 THEN 'a' WHEN id = 3 THEN 'b' end) = 'c' ").explain()
> {code}
> Before:
> {noformat}
> == Physical Plan ==
> *(1) Filter CASE WHEN (id#1L = 1) THEN false WHEN (id#1L = 3) THEN false END
> +- *(1) ColumnarToRow
>    +- FileScan parquet default.t1[id#1L] Batched: true, DataFilters: [CASE WHEN (id#1L = 1) THEN false WHEN (id#1L = 3) THEN false END], Format: Parquet, Location: InMemoryFileIndex[file:/Users/yumwang/opensource/spark/spark-warehouse/org.apache.spark.sql.DataF..., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<id:bigint>
> {noformat}
> After:
> {noformat}
> == Physical Plan ==
> LocalTableScan <empty>, [id#1L]
> {noformat}



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