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https://issues.apache.org/jira/browse/SPARK-38247?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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yikf resolved SPARK-38247.
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Resolution: Invalid
> 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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