Davies Liu created SPARK-15438:
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Summary: Improve the explain of whole-stage codegen
Key: SPARK-15438
URL: https://issues.apache.org/jira/browse/SPARK-15438
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.0.0
Reporter: Davies Liu
Assignee: Davies Liu
Currently, the explain of a query with whole-stage codegen looks like this
{code}
>>> df = sqlCtx.range(1000);df2 =
>>> sqlCtx.range(1000);df.join(pyspark.sql.functions.broadcast(df2),
>>> 'id').explain()
== Physical Plan ==
WholeStageCodegen
: +- Project [id#1L]
: +- BroadcastHashJoin [id#1L], [id#4L], Inner, BuildRight, None
: :- Range 0, 1, 4, 1000, [id#1L]
: +- INPUT
+- BroadcastExchange HashedRelationBroadcastMode(List(input[0, bigint]))
+- WholeStageCodegen
: +- Range 0, 1, 4, 1000, [id#4L]
{code}
The problem is that the plan looks much different than logical plan, make us
hard to understand the plan (especially when the logical plan is not showed
together).
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