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Update FilterColumnsBlockInputStream.h

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alexey-milovidov 2017-07-04 19:03:15 +03:00
parent 7bc0e40135
commit 85bdb472ea
1 changed files with 3 additions and 1 deletions
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dbms/src/DataStreams/FilterColumnsBlockInputStream.h
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@ -7,7 +7,9 @@
namespace DB
{
/// Removes columns other than columns_to_save_ from block
/// Removes columns other than columns_to_save_ from block,
/// and reorders columns as in columns_to_save_.
/// Functionality is similar to ExpressionBlockInputStream with ExpressionActions containing PROJECT action.
class FilterColumnsBlockInputStream : public IProfilingBlockInputStream
{
public: