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improve change
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@ -1112,12 +1112,14 @@ void InterpreterSelectQuery::executeFetchColumns(
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/// Optimization for trivial query like SELECT count() FROM table.
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bool optimize_trivial_count =
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syntax_analyzer_result->optimize_trivial_count
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&& settings.select_sequential_consistency
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&& storage
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&& !filter_info
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&& processing_stage == QueryProcessingStage::FetchColumns
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&& query_analyzer->hasAggregation()
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&& (query_analyzer->aggregates().size() == 1)
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&& typeid_cast<AggregateFunctionCount *>(query_analyzer->aggregates()[0].function.get());
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if (optimize_trivial_count)
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{
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@ -619,7 +619,7 @@ TreeRewriterResultPtr TreeRewriter::analyzeSelect(
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result.ast_join = select_query->join();
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if (result.optimize_trivial_count)
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result.optimize_trivial_count = settings.optimize_trivial_count_query && settings.select_sequential_consistency &&
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result.optimize_trivial_count = settings.optimize_trivial_count_query &&
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!select_query->where() && !select_query->prewhere() && !select_query->groupBy() && !select_query->having() &&
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!select_query->sampleSize() && !select_query->sampleOffset() && !select_query->final() &&
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(tables_with_columns.size() < 2 || isLeft(result.analyzed_join->kind()));
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