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Fixed error in prev. revision [#CLICKHOUSE-3806]
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@ -52,17 +52,27 @@ StorageMerge::StorageMerge(
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NameAndTypePair StorageMerge::getColumn(const String & column_name) const
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{
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/// virtual column of the Merge table itself
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if (column_name == "_table")
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return { column_name, std::make_shared<DataTypeString>() };
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/// virtual (and real) columns of the underlying tables
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auto first_table = getFirstTable([](auto &&) { return true; });
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if (first_table)
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return first_table->getColumn(column_name);
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return IStorage::getColumn(column_name);
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}
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bool StorageMerge::hasColumn(const String & column_name) const
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{
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if (column_name == "_table")
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return true;
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auto first_table = getFirstTable([](auto &&) { return true; });
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if (first_table)
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return first_table->hasColumn(column_name);
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return IStorage::hasColumn(column_name);
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}
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