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Remove extra columns from sample in StorageBuffer.

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This commit is contained in:
Nikolai Kochetov 2020-06-11 15:18:45 +03:00
parent a93ae46ac1
commit ed0826efa7
1 changed files with 11 additions and 0 deletions
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11
src/Storages/StorageBuffer.cpp
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@ -229,6 +229,17 @@ Pipes StorageBuffer::read(
for (auto & buf : buffers)
pipes_from_buffers.emplace_back(std::make_shared<BufferSource>(column_names, buf, *this));
/// Convert pipes from table to structure from buffer.
if (!pipes_from_buffers.empty() && !pipes_from_dst.empty()
&& !blocksHaveEqualStructure(pipes_from_buffers.front().getHeader(), pipes_from_dst.front().getHeader()))
{
for (auto & pipe : pipes_from_dst)
pipe.addSimpleTransform(std::make_shared<ConvertingTransform>(
pipe.getHeader(),
pipes_from_buffers.front().getHeader(),
ConvertingTransform::MatchColumnsMode::Name));
}
/** If the sources from the table were processed before some non-initial stage of query execution,
* then sources from the buffers must also be wrapped in the processing pipeline before the same stage.
*/