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Michael Kolupaev 2014-07-30 16:22:12 +04:00
parent 2bd9733223
commit b2f5b9bfab
1 changed files with 4 additions and 0 deletions
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4
dbms/src/Storages/MergeTree/MergeTreeDataSelectExecutor.cpp
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@ -62,6 +62,10 @@ BlockInputStreams MergeTreeDataSelectExecutor::read(
else
virt_column_names.push_back(name);
/// Если в запросе только виртуальные столбцы, надо запросить хотя бы один любой другой.
if (real_column_names.size() == 0)
real_column_names.push_back(ExpressionActions::getSmallestColumn(data.getColumnsList()));
Block virtual_columns_block = getBlockWithVirtualColumns(parts);
/// Если запрошен хотя бы один виртуальный столбец, пробуем индексировать