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Merge pull request #15178 from amosbird/dtcf 

Fix performance issue when doing datetime comparison
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alexey-milovidov 2020-09-23 20:33:23 +03:00 committed by GitHub
parent 7dad84ea6b ee45395942
commit 3bc09bb867
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2 changed files with 6 additions and 1 deletions
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2
src/Functions/FunctionsComparison.h
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@ -1213,7 +1213,7 @@ public:
const bool left_is_string = isStringOrFixedString(which_left);
const bool right_is_string = isStringOrFixedString(which_right);
bool date_and_datetime = (left_type != right_type) &&
bool date_and_datetime = (which_left.idx != which_right.idx) &&
which_left.isDateOrDateTime() && which_right.isDateOrDateTime();
if (left_is_num && right_is_num && !date_and_datetime)

5
tests/performance/datetime_comparison.xml Normal file
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@ -0,0 +1,5 @@
<test>
<query>SELECT count() FROM numbers(1000000000) WHERE materialize(now()) > toString(toDateTime('2020-09-30 00:00:00'))</query>
<query>SELECT count() FROM numbers(1000000000) WHERE materialize(now()) > toUInt32(toDateTime('2020-09-30 00:00:00'))</query>
<query>SELECT count() FROM numbers(1000000000) WHERE materialize(now()) > toDateTime('2020-09-30 00:00:00')</query>
</test>