[DEPRECATED] Maximum repeatedly substituted alias size #472
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@vinooganesh FYSA |
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looks like tests are failing - want to fix? |
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@vinooganesh yeah it's a circle/GH issue: Any ideas? |
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@vinooganesh or can you retrigger the build? I don't have permissions |
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builds on forks aren't enabled |
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Ok, can you either enable builds on forks, or give me write access to palantir/spark so I can make a branch :) |
j-esse
changed the title
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Moved to #475 |
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https://issues.apache.org/jira/browse/SPARK-26626
apache#23556
What changes were proposed in this pull request?
This adds a
spark.sql.maxRepeatedAliasSizeconfig option, which specifies the maximum size of an aliased expression to be substituted (in CollapseProject and PhysicalOperation). This prevents large aliased expressions from being substituted multiple times and exploding the size of the expression tree, eventually OOMing the driver.The default config value of 100 was chosen through testing to find the optimally performant value:
How was this patch tested?
Added unit tests, and did manual testing