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keep LowCardinality type in tuple() function

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This commit is contained in:
Anton Popov 2022-07-12 02:01:41 +00:00
parent 109371f08f
commit b67405915e
3 changed files with 11 additions and 0 deletions
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1
src/Functions/tuple.cpp
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@ -55,6 +55,7 @@ public:
/// tuple(..., Nothing, ...) -> Tuple(..., Nothing, ...)
bool useDefaultImplementationForNothing() const override { return false; }
bool useDefaultImplementationForConstants() const override { return true; }
bool useDefaultImplementationForLowCardinalityColumns() const override { return false; }
DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
{

4
tests/queries/0_stateless/02354_tuple_lowcardinality.reference Normal file
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@ -0,0 +1,4 @@
Tuple(LowCardinality(String), LowCardinality(UInt8))
Tuple(LowCardinality(String), LowCardinality(UInt8))
Tuple(LowCardinality(String), LowCardinality(UInt8))
Tuple(LowCardinality(String), LowCardinality(UInt8))

6
tests/queries/0_stateless/02354_tuple_lowcardinality.sql Normal file
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@ -0,0 +1,6 @@
SET allow_suspicious_low_cardinality_types = 1;
SELECT toTypeName(tuple(toLowCardinality('1'), toLowCardinality(1)));
SELECT toTypeName(tuple(materialize(toLowCardinality('1')), toLowCardinality(1)));
SELECT toTypeName(tuple(toLowCardinality('1'), materialize(toLowCardinality(1))));
SELECT toTypeName(tuple(materialize(toLowCardinality('1')), materialize(toLowCardinality(1))));