fix unique for empty point sets

2024-11-21 23:21:59 +00:00 · 2018-07-07 13:37:07 +03:00 · 2018-07-07 13:37:07 +03:00 · ca837723ed
commit ca837723ed
parent 8c4f04c452
3 changed files with 5 additions and 0 deletions
--- a/dbms/src/AggregateFunctions/AggregateFunctionHistogram.h
+++ b/dbms/src/AggregateFunctions/AggregateFunctionHistogram.h
@ -159,6 +159,9 @@ private:
     */
    void unique()
    {
+        if (size == 0)
+            return;
+
        size_t left = 0;

        for (auto right = left + 1; right < size; right++)
--- a/dbms/tests/queries/0_stateless/00647_histogram.reference
+++ b/dbms/tests/queries/0_stateless/00647_histogram.reference
@ -5,3 +5,4 @@
 0.36	0.99	4.75
 -1	1	80
 [(-2,-2,1)]
+[]
--- a/dbms/tests/queries/0_stateless/00647_histogram.sql
+++ b/dbms/tests/queries/0_stateless/00647_histogram.sql
@ -6,3 +6,4 @@ WITH arrayJoin(histogram(1)(sin(number-40))) AS res SELECT round(res.1, 2), roun

 SELECT histogram(10)(-2);

+select histogramIf(3)(number, number > 11) from (select * from system.numbers limit 10);