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Posted to issues@spark.apache.org by "Max Thompson (Jira)" <ji...@apache.org> on 2019/12/27 18:52:00 UTC
[jira] [Created] (SPARK-30369) Prune uncomputed children of
InMemoryRelation
Max Thompson created SPARK-30369:
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Summary: Prune uncomputed children of InMemoryRelation
Key: SPARK-30369
URL: https://issues.apache.org/jira/browse/SPARK-30369
Project: Spark
Issue Type: Improvement
Components: SQL, Web UI
Affects Versions: 3.0.0
Reporter: Max Thompson
This is a follow-up JIRA for: [De-duplicate InMemoryTableScan cached plans in SQL UI JIRA URL]
Currently with the changes introduced by the JIRAs this follows up on, if a query persists data that is later read by another query, the uncomputed subtree of the plan for the persisted data will be shown:
!bLgZ04NuAvvtXpD8SABA xBkAgChDnAEAiDLEGQCAKEOcAQCIMsQZAIAoQ5wBAIgyxBkAgChDnAEAiDLEGQCAKEOcAQCIMsQZAIAoQ5wBAIgyxBkAgChDnAEAiDLEGQCAKEOcAQCIMv8P7NCckWtEmyMAAAAASUVORK5CYII=!
To avoid showing uncomputed subtrees in the query plan (which may become appreciably large in a situation such as if multiple iterative queries are run that each use persisted data from the last query), the uncomputed subtrees could be removed before rendering the query plan:
!dGo9o CEEIYSEIIIcQcDCQhhBBiBgaSEEIIMQMDSQghhJiBgSSEEELMwEASQgghZmAgCSGEEDMwkIQQQogZGEhCCCHEDAwkIYQQYgYGkhBCCDEDA0kIIYSYgYEkhBBCzMBAEkIIIWZgIAkhhBAzMJCEEEKIGRhIQgghxAwMJCGEEGIGBpIQQggxAwNJCCGEmIGBJIQQQszAQBJCCCFm P8Bum1cUi kSH0AAAAASUVORK5CYII=!
A configuration property should be added that enables this feature when set to true. If a user wants to see the uncomputed subtrees, they can simply disable the configuration property.
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