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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2020/12/20 16:01:00 UTC
[jira] [Commented] (SPARK-33861) Simplify conditional in predicate
[ https://issues.apache.org/jira/browse/SPARK-33861?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17252461#comment-17252461 ]
Apache Spark commented on SPARK-33861:
--------------------------------------
User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/30865
> Simplify conditional in predicate
> ---------------------------------
>
> Key: SPARK-33861
> URL: https://issues.apache.org/jira/browse/SPARK-33861
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Yuming Wang
> Priority: Major
>
> The use case is:
> {noformat}
> spark.sql("create table t1 using parquet as select id as a, id as b from range(10)")
> spark.sql("select * from t1 where CASE WHEN a > 2 THEN b + 10 END > 5").explain()
> {noformat}
> Before this pr:
> {noformat}
> == Physical Plan ==
> *(1) Filter CASE WHEN (a#3L > 2) THEN ((b#4L + 10) > 5) END
> +- *(1) ColumnarToRow
> +- FileScan parquet default.t1[a#3L,b#4L] Batched: true, DataFilters: [CASE WHEN (a#3L > 2) THEN ((b#4L + 10) > 5) END], Format: Parquet, Location: InMemoryFileIndex[file:/Users/yumwang/opensource/spark/spark-warehouse/org.apache.spark.sql.DataF..., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<a:bigint,b:bigint>
> {noformat}
> After this pr:
> {noformat}
> == Physical Plan ==
> *(1) Filter (((isnotnull(a#3L) AND isnotnull(b#4L)) AND (a#3L > 2)) AND ((b#4L + 10) > 5))
> +- *(1) ColumnarToRow
> +- FileScan parquet default.t1[a#3L,b#4L] Batched: true, DataFilters: [isnotnull(a#3L), isnotnull(b#4L), (a#3L > 2), ((b#4L + 10) > 5)], Format: Parquet, Location: InMemoryFileIndex[file:/Users/yumwang/opensource/spark/spark-warehouse/org.apache.spark.sql.DataF..., PartitionFilters: [], PushedFilters: [IsNotNull(a), IsNotNull(b), GreaterThan(a,2)], ReadSchema: struct<a:bigint,b:bigint>
> {noformat}
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