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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/02/18 03:52:00 UTC
[jira] [Commented] (SPARK-38247) Unify the output of df.explain and "explain " if plan is command
[ https://issues.apache.org/jira/browse/SPARK-38247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17494357#comment-17494357 ]
Apache Spark commented on SPARK-38247:
--------------------------------------
User 'Yikf' has created a pull request for this issue:
https://github.com/apache/spark/pull/35564
> Unify the output of df.explain and "explain " if plan is command
> ----------------------------------------------------------------
>
> Key: SPARK-38247
> URL: https://issues.apache.org/jira/browse/SPARK-38247
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: yikf
> Priority: Minor
> Fix For: 3.3.0
>
>
> This pr aims to unify the out of df.explain and "explain" sql if plan is a command
> * unify the out of df.explain and "explain" sql if plan is a command
> * Make the output of explain unambiguous if plan is a command
>
> Lets say have a query like "show tables", we want to explain it
> Before this pr:
> {code:java}
> == Parsed Logical Plan ==
> 'ShowTables [namespace#62, tableName#63, isTemporary#64]
> +- 'UnresolvedNamespace== Analyzed Logical Plan ==
> namespace: string, tableName: string, isTemporary: boolean
> ShowTablesCommand default, [namespace#62, tableName#63, isTemporary#64], false== Optimized Logical Plan ==
> CommandResult [namespace#62, tableName#63, isTemporary#64], Execute ShowTablesCommand, [[default,lt,false], [default,people,false], [default,person,false], [default,rt,false], [default,t,false], [default,t1,false], [default,t10086,false], [default,txtsource,false]]
> +- ShowTablesCommand default, [namespace#62, tableName#63, isTemporary#64], false== Physical Plan ==
> CommandResult [namespace#62, tableName#63, isTemporary#64]
> +- Execute ShowTablesCommand
> +- ShowTablesCommand default, [namespace#62, tableName#63, isTemporary#64], false {code}
> After this pr:
> {code:java}
> == Parsed Logical Plan ==
> 'ShowTables [namespace#0, tableName#1, isTemporary#2]
> +- 'UnresolvedNamespace== Analyzed Logical Plan ==
> namespace: string, tableName: string, isTemporary: boolean
> ShowTables [namespace#0, tableName#1, isTemporary#2]
> +- ResolvedNamespace V2SessionCatalog(spark_catalog), [default]== Optimized Logical Plan ==
> ShowTables [namespace#0, tableName#1, isTemporary#2]
> +- ResolvedNamespace V2SessionCatalog(spark_catalog), [default]== Physical Plan ==
> ShowTables [namespace#0, tableName#1, isTemporary#2], V2SessionCatalog(spark_catalog), [default] {code}
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