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[SPARK-12409][SPARK-12387][SPARK-12391][SQL] Refactor filter pushdown for JDBCRDD and add few filters #10470

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[SPARK-12409][SPARK-12387][SPARK-12391][SQL] Refactor filter pushdown for JDBCRDD and add few filters #10470

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1e3adbc
Refactor filter pushdown for JDBCRDD and add few filters.
viirya Dec 24, 2015
05188b7
Use Option instead of Some.
viirya Dec 24, 2015
b0da6fc
Update method comment.
viirya Dec 29, 2015
a7ef79e
For comments.
viirya Dec 30, 2015
cb7ce21
Merge remote-tracking branch 'upstream/master' into refactor-jdbc-filter
viirya Dec 31, 2015
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Merge remote-tracking branch 'upstream/master' into refactor-jdbc-filter
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viirya committed Dec 31, 2015
commit cb7ce21150e08e12e5eca3e5d08cfa4f2a105adc
1 change: 1 addition & 0 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
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Expand Up @@ -207,6 +207,7 @@ private[sql] object JDBCRDD extends Logging {
case Or(f1, f2) =>
// We can't compile Or filter unless both sub-filters are compiled successfully.
// It applies too for the following And filter.
// If we can make sure compileFilter supports all filters, we can remove this check.
val or = Seq(f1, f2).map(compileFilter(_)).flatten
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@maropu maropu Dec 30, 2015

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Please add tests in case of failing to compile sub-filters.
And also, what is an concrete example for that?

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@viirya viirya Dec 30, 2015

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Do we already support all filters here?

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@maropu maropu Dec 30, 2015

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I think that this pr includes all the implemented filters in o.a.s.sources.filters.

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@viirya viirya Dec 30, 2015

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I added a test for that using EqualNullSafe.

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@maropu maropu Dec 30, 2015

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My bad and I understood.
Actually, I'm not sure how to handle EqualNullSafe. Most the recent databases support IS NOT DISTINCT FROM corresponding to EqualNullSafe in SQL99 though, older databases do not.
ISTM that following prs consider this.

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@HyukjinKwon HyukjinKwon Dec 30, 2015

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Oh actually I opened a PR for EqualNullSafe here already few months ago. #8743

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@maropu maropu Dec 30, 2015

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Oh great. If #8743 merged, I think it could simplify the And/Or entries in compileFilters.

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@viirya viirya Dec 30, 2015

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Good to know that.

if (or.size == 2) {
or.map(p => s"($p)").mkString(" OR ")
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