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use isNullable function in join_common/convertTypeToNullable

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vdimir 2022-02-18 13:09:11 +00:00
parent 510a909d0d
commit 6eda8ef914
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src/Interpreters/join_common.cpp
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@ -127,7 +127,7 @@ bool isNullable(const DataTypePtr & type)
/// Note: LowCardinality(T) transformed to LowCardinality(Nullable(T))
DataTypePtr convertTypeToNullable(const DataTypePtr & type)
{
if (type->isNullable())
if (isNullable(type))
return type;
if (const auto * low_cardinality_type = typeid_cast<const DataTypeLowCardinality *>(type.get()))