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Add LowCardinality conversion to Native format if types of columns are not equals.

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This commit is contained in:
Nikolai Kochetov 2019-09-10 17:16:31 +03:00
parent aa0e3fd0d1
commit 30394113a1
1 changed files with 4 additions and 1 deletions
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5
dbms/src/DataStreams/NativeBlockInputStream.cpp
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@ -155,10 +155,13 @@ Block NativeBlockInputStream::readImpl()
/// Support insert from old clients without low cardinality type. /// Support insert from old clients without low cardinality type.
bool revision_without_low_cardinality = server_revision && server_revision < DBMS_MIN_REVISION_WITH_LOW_CARDINALITY_TYPE; bool revision_without_low_cardinality = server_revision && server_revision < DBMS_MIN_REVISION_WITH_LOW_CARDINALITY_TYPE;
if (header && (convert_types_to_low_cardinality || revision_without_low_cardinality)) if (header && (convert_types_to_low_cardinality
|| revision_without_low_cardinality
|| header.getByPosition(i).type->equals(*column.type)))
{ {
column.column = recursiveLowCardinalityConversion(column.column, column.type, header.getByPosition(i).type); column.column = recursiveLowCardinalityConversion(column.column, column.type, header.getByPosition(i).type);
column.type = header.getByPosition(i).type; column.type = header.getByPosition(i).type;
column.name = header.getByPosition(i).name;
} }
res.insert(std::move(column)); res.insert(std::move(column));