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fix getting value from const column

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This commit is contained in:
CurtizJ 2018-09-07 17:06:10 +03:00
parent 8fc1ddd646
commit 7c2fef0c1a
2 changed files with 3 additions and 1 deletions
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2
dbms/src/Functions/FunctionsArithmetic.h
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@ -1183,7 +1183,7 @@ class FunctionBinaryArithmetic : public IFunction
auto & vec_to = column_to->getData();
auto & vec_from = column_from->getData();
UInt64 m = block.getByPosition(new_arguments[1]).column->getUInt(0);
UInt64 m = typeid_cast<const ColumnConst *>(block.getByPosition(new_arguments[1]).column.get())->getValue<UInt64>();
/// We use exponentiation by squaring algorithm to perform multiplying aggregate states by N in O(log(N)) operations
/// https://en.wikipedia.org/wiki/Exponentiation_by_squaring

2
dbms/tests/queries/0_stateless/00647_multiply_aggregation_state.sql
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@ -1,3 +1,5 @@
SET send_logs_level = 'none';
SELECT countMerge(x) AS y FROM ( SELECT countState() * 2 AS x FROM ( SELECT 1 ));
SELECT countMerge(x) AS y FROM ( SELECT countState() * 0 AS x FROM ( SELECT 1 UNION ALL SELECT 2));
SELECT sumMerge(y) AS z FROM ( SELECT sumState(x) * 11 AS y FROM ( SELECT 1 AS x UNION ALL SELECT 2 AS x));