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https://issues.apache.org/jira/browse/SPARK-33848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17255790#comment-17255790
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Apache Spark commented on SPARK-33848:
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User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/30955
> Push the UnaryExpression into (if / case) branches
> --------------------------------------------------
>
> Key: SPARK-33848
> URL: https://issues.apache.org/jira/browse/SPARK-33848
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Yuming Wang
> Assignee: Yuming Wang
> Priority: Major
> Fix For: 3.2.0
>
>
> Push the cast into (if / case) branches. The use case is:
> {code:sql}
> create table t1 using parquet as select id from range(10);
> explain select id from t1 where (CASE WHEN id = 1 THEN '1' WHEN id = 3 THEN
> '2' end) > 3;
> {code}
> Before this pr:
> {noformat}
> == Physical Plan ==
> *(1) Filter (cast(CASE WHEN (id#1L = 1) THEN 1 WHEN (id#1L = 3) THEN 2 END as
> int) > 3)
> +- *(1) ColumnarToRow
> +- FileScan parquet default.t1[id#1L] Batched: true, DataFilters:
> [(cast(CASE WHEN (id#1L = 1) THEN 1 WHEN (id#1L = 3) THEN 2 END as int) >
> 3)], Format: Parquet, Location:
> InMemoryFileIndex[file:/Users/yumwang/opensource/spark/spark-warehouse/org.apache.spark.sql.DataF...,
> PartitionFilters: [], PushedFilters: [], ReadSchema: struct<id:bigint>
> {noformat}
> After this pr:
> {noformat}
> == Physical Plan ==
> LocalTableScan <empty>, [id#1L]
> {noformat}
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