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This commit is contained in:
Nikolai Kochetov 2018-06-25 16:08:35 +03:00
parent 60f0ed9296
commit bd7c72de5c
1 changed files with 1 additions and 1 deletions
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2
dbms/src/Interpreters/ExpressionAnalyzer.cpp
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@ -2533,7 +2533,7 @@ bool ExpressionAnalyzer::appendPrewhere(ExpressionActionsChain & chain, bool onl
/// Example: select A prewhere B > 0. B can be removed at prewhere step.
/// 2. Store side columns which were calculated during prewhere actions execution if they are used.
/// Example: select F(A) prewhere F(A) > 0. F(A) can be saved from prewhere step.
/// 3. Check if we can remove filer column at prewhere step. If we can, action will store single REMOVE_COLUMN.
/// 3. Check if we can remove filter column at prewhere step. If we can, action will store single REMOVE_COLUMN.
ColumnsWithTypeAndName columns = step.actions->getSampleBlock().getColumnsWithTypeAndName();
auto required_columns = step.actions->getRequiredColumns();
NameSet prewhere_input_names(required_columns.begin(), required_columns.end());