francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-495452114
So I'm closing this now, and open another ticket for semi/anti join
optimization.
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-495108399
Thanks @dilipbiswal @cloud-fan .
I'm ok for trying these, just wanna make contributions to the project. But I
think
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-494676914
retest this please
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francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-494249369
I'm not sure who is familiar with this, could we ping other reviewers?
cc @cloud-fan, @viirya, @dilipbiswal
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-492895116
cc @cloud-fan
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francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-487329532
cc @cloud-fan @viirya @dilipbiswal
This is an
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-486619453
I have made some tests in MySQL and SQLServer, and both have the same result
with PostgreSQL.
I think we'd
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-486334094
Hard to find a SQL spec :(
But the document I referenced
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-485714371
I'm still working on this.
When I was dealing with 'null' with `InSubquery`, I found something wrong.
In
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-485061390
I add several unit tests for both single-column IN subquery and multi-column
IN subquery. I didn't test `NOT IN`
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-483660947
Yes, I'm trying to add a physical plan for non-correlated IN now, and will
update this PR soon.
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-483642974
I remember that for `InSubquery`, we do not distinguish NULL from FALSE
subquery results currently. Here is an
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-483302729
> how about (a, b) in (select c, d ...)? How do we convert it?
> If there is no other SQL system doing it, maybe it's
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-483272960
Hi,
I'm back with some ideas. I have not found any SQL system that implements
the conversion. But IMO, this method
francis0407 commented on issue #24344: [SPARK-27440][SQL] Optimize uncorrelated
predicate subquery
URL: https://github.com/apache/spark/pull/24344#issuecomment-482066270
cc @cloud-fan @maropu @dongjoon-hyun
This is an
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