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Update IBlockInputStream.h

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alexey-milovidov 2017-04-08 00:21:58 +04:00
parent d54d44d97d
commit d0629a9df6
1 changed files with 7 additions and 1 deletions
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8
dbms/src/DataStreams/IBlockInputStream.h
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@ -25,6 +25,10 @@ using TableStructureReadLocksList = std::list<TableStructureReadLockPtr>;
struct Progress;
namespace ErrorCodes
{
extern const int OUTPUT_IS_NOT_SORTED;
}
/** Коллбэк для отслеживания прогресса выполнения запроса.
@ -77,8 +81,10 @@ public:
*/
virtual String getID() const = 0;
/// If this stream generates data in order by some keys, return true.
virtual bool isSortedOutput() const { return false; }
virtual const SortDescription & getSortDescription() const { throw std::logic_error( "has no SortDescription" ); }
/// In case of isSortedOutput, return corresponding SortDescription
virtual const SortDescription & getSortDescription() const { throw Exception("Output of " + getName() + " is not sorted", ErrorCodes::OUTPUT_IS_NOT_SORTED); }
BlockInputStreams & getChildren() { return children; }