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[SPARK-33884][SQL] Simplify CaseWhenclauses with (true and false) and (false and true) #30898

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wangyum wants to merge 9 commits into from
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[SPARK-33884][SQL] Simplify CaseWhenclauses with (true and false) and (false and true) #30898

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c78882a
simplify CaseWhen when one clause is null and another is boolean
wangyum Dec 23, 2020
44733f8
Add test to PushFoldableIntoBranchesSuite
wangyum Dec 23, 2020
15c74ca
Merge remote-tracking branch 'upstream/master' into SPARK-33884
wangyum Dec 24, 2020
afbded1
Merge remote-tracking branch 'upstream/master' into SPARK-33884
wangyum Dec 24, 2020
91ec8b2
fix
wangyum Dec 25, 2020
871d29f
fix
wangyum Dec 25, 2020
ae3b284
fix
wangyum Dec 28, 2020
186a3d5
Merge remote-tracking branch 'upstream/master' into SPARK-33884
wangyum Dec 29, 2020
d3b072e
fix
wangyum Dec 29, 2020
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Add test to PushFoldableIntoBranchesSuite
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@wangyum
wangyum committed Dec 23, 2020
commit 44733f8ad27f4fb53256accf7652b5ef54f72cab
13 changes: 13 additions & 0 deletions ...rc/test/scala/org/apache/spark/sql/catalyst/optimizer/PushFoldableIntoBranchesSuite.scala
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Expand Up @@ -258,4 +258,17 @@ class PushFoldableIntoBranchesSuite
EqualTo(CaseWhen(Seq((a, Literal(1)), (c, Literal(2))), None).cast(StringType), Literal("4")),
CaseWhen(Seq((a, FalseLiteral), (c, FalseLiteral)), None))
}

test("SPARK-33884: simplify CaseWhen when one clause is null and another is boolean") {
val p = IsNull('a)
val nullLiteral = Literal(null, BooleanType)
assertEquivalent(EqualTo(
CaseWhen(Seq((p, Literal.create(null, IntegerType))), Literal(1)),
Literal(2)),
And(p, nullLiteral))
assertEquivalent(EqualTo(
CaseWhen(Seq((p, Literal("str"))), Literal("1")).cast(IntegerType),
Literal(2)),
And(p, nullLiteral))
}
}