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Retest this please
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@rxin / @davies this one is ready for review.
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@hvanhovell Since you separate resolution and rewrite, it's easy to move
the rewrite rule into optimizer, right (those checking could be moved to
CheckAnalysis)? By defe
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@davies after all splitting the rule made reasoning about sub-queries
easier. So now we have a rule for resolution and one for rewriting.
The rewriting is cu
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The way to run an uncorrelated EXISTS/IN could be changed (we may also use
that for dynamic partition pruning), keep them as predicate enable us to do
predicate push dow
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added WIP tag because I am still working on a nicer EXISTS rule.
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@davies I do agree that it is better to do the rewriting later on. I don't
think SQL generation is too much of a problem, since semi and anti joins are
supported by
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/*
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SharedSQLConte
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o
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@hvanhovell Thanks for taking over these!
In the first prototype, I did the rewriting in analyzer, later I realize
that it may make more sense to do that in Opti
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[SPARK-4226][SQL] Support Correlated Sub-queries
### What changes were proposed in this pull request?
This PR adds support for correlated subqueries to Spark. Correlated
sub-queries are typi
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