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Posted to issues@spark.apache.org by "Wan Kun (Jira)" <ji...@apache.org> on 2023/02/24 06:47:00 UTC
[jira] [Updated] (SPARK-42551) Support subexpression elimination in FilterExec
[ https://issues.apache.org/jira/browse/SPARK-42551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wan Kun updated SPARK-42551:
----------------------------
Description:
Just like SPARK-33092, We can support subexpression elimination in FilterExec in Whole-stage codegen.
For example:
{code:java}
SELECT * FROM (
SELECT v, v * v + 1 v1 from values(1) as t2(v)
) t
where v > 0 and v1 > 5 and v1 < 10
Codegen plan
{code:java}
*(1) Project [v#1, ((v#1 * v#1) + 1) AS v1#0]
+- *(1) Filter (((v#1 > 0) AND (((v#1 * v#1) + 1) > 5)) AND (((v#1 * v#1) + 1) < 10))
+- *(1) LocalTableScan [v#1]
{code}
The subexpression *(v#1 * v#1) + 1* will be execute twice times.
was:
Just like SPARK-33092, We can support subexpression elimination in FilterExec in Whole-stage codegen.
For example:
{code:java}
SELECT * FROM (
SELECT v, v * v + 1 v1 from values(1) as t2(v)
) t
where v > 0 and v1 > 5 and v1 < 10
Codegen plan
{code:java}
*(1) Project [v#1, ((v#1 * v#1) + 1) AS v1#0]
+- *(1) Filter (((v#1 > 0) AND (((v#1 * v#1) + 1) > 5)) AND (((v#1 * v#1) + 1) < 10))
+- *(1) LocalTableScan [v#1]
{code}
The subexpression *(v#1 * v#1) + 1)* will be execute twice times.
> Support subexpression elimination in FilterExec
> -----------------------------------------------
>
> Key: SPARK-42551
> URL: https://issues.apache.org/jira/browse/SPARK-42551
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.3.2
> Reporter: Wan Kun
> Priority: Major
>
> Just like SPARK-33092, We can support subexpression elimination in FilterExec in Whole-stage codegen.
> For example:
> {code:java}
> SELECT * FROM (
> SELECT v, v * v + 1 v1 from values(1) as t2(v)
> ) t
> where v > 0 and v1 > 5 and v1 < 10
> Codegen plan
> {code:java}
> *(1) Project [v#1, ((v#1 * v#1) + 1) AS v1#0]
> +- *(1) Filter (((v#1 > 0) AND (((v#1 * v#1) + 1) > 5)) AND (((v#1 * v#1) + 1) < 10))
> +- *(1) LocalTableScan [v#1]
> {code}
> The subexpression *(v#1 * v#1) + 1* will be execute twice times.
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