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https://issues.apache.org/jira/browse/SPARK-45199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-45199:
-----------------------------------
Labels: pull-request-available (was: )
> Release cast from attribute in filter to support predicate push down
> --------------------------------------------------------------------
>
> Key: SPARK-45199
> URL: https://issues.apache.org/jira/browse/SPARK-45199
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.5.0
> Reporter: Wechar
> Priority: Major
> Labels: pull-request-available
>
> When a {{cast clause}} was used in a column in a filter, it will not be able
> to push down. We can remove the cast from attribute side to support predicate
> push down if the cast not change the precision or range.
> Test query:
> {code:sql}
> -- dt is string type
> explain select * from wechar_tbl where cast(dt as date) =
> date_sub(current_date(), 1);
> {code}
> Before this patch:
> {code:bash}
> == Physical Plan ==
> *(1) ColumnarToRow
> +- FileScan parquet default.wechar_tbl[id#5,name#6,dt#7] Batched: true,
> DataFilters: [], Format: Parquet, Location: InMemoryFileIndex(0 paths)[],
> PartitionFilters: [isnotnull(dt#7), (cast(dt#7 as date) = 2023-09-17)],
> PushedFilters: [], ReadSchema: struct<id:int,name:string>
> {code}
> *cast(dt#7 as date) = 2023-09-17 can not be push down in partition filter*
> After this patch:
> {code:bash}
> == Physical Plan ==
> *(1) ColumnarToRow
> +- FileScan parquet default.wechar_tbl[id#62,name#63,dt#64] Batched: true,
> DataFilters: [], Format: Parquet, Location: InMemoryFileIndex[],
> PartitionFilters: [isnotnull(dt#64), (dt#64 = 2023-09-17)], PushedFilters:
> [], ReadSchema: struct<id:int,name:string>
> {code}
> *(dt#64 = 2023-09-17) can be push down in partition filter*
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