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alesapin 2018-11-01 10:54:27 +03:00 committed by Alex Zatelepin
parent abcc692dbf
commit 63c6647be4
1 changed files with 1 additions and 2 deletions
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3
dbms/src/Interpreters/ExpressionAnalyzer.cpp
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@ -1258,8 +1258,7 @@ const ExpressionAnalyzer::AnalyzedJoin::JoinedColumnsList & ExpressionAnalyzer::
joined_column.name_and_type.name = qualified_name;
}
/// We don't want to add duplicate columns.
/// They may appear from nested joins with unaliased subqueries, but actually they exist only in AST
/// We don't want to select duplicate columns from the joined subquery if they appear
if (std::find(columns_from_joined_table.begin(), columns_from_joined_table.end(), joined_column) == columns_from_joined_table.end())
columns_from_joined_table.push_back(joined_column);