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MDEV-5781 Item_sum_std::val_real(): Assertion `nr >= 0.0' fails on query with STDDEV_POP, ROUND and variable

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This commit is contained in:
Alexander Barkov 2014-03-23 19:43:01 +04:00
parent 92bd6801b9
commit ce3c457e6d
3 changed files with 36 additions and 0 deletions
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15
mysql-test/r/func_math.result
View File

@ -756,3 +756,18 @@ select 5 div 2.0;
select 5.9 div 2, 1.23456789e3 DIV 2, 1.23456789e9 DIV 2, 1.23456789e19 DIV 2;
5.9 div 2 1.23456789e3 DIV 2 1.23456789e9 DIV 2 1.23456789e19 DIV 2
2 617 617283945 6172839450000000000
#
# End of 5.5 tests
#
#
# Start of 10.0 tests
#
#
# MDEV-5781 Item_sum_std::val_real(): Assertion `nr >= 0.0' fails on query with STDDEV_POP, ROUND and variable
#
SELECT STDDEV_POP(ROUND(0,@A:=2009)) FROM (SELECT 1 UNION SELECT 2) fake_table;
STDDEV_POP(ROUND(0,@A:=2009))
0.0000
#
# End of 10.0 tests
#

18
mysql-test/t/func_math.test
View File

@ -559,3 +559,21 @@ select 5.0 div 2.0;
select 5.0 div 2;
select 5 div 2.0;
select 5.9 div 2, 1.23456789e3 DIV 2, 1.23456789e9 DIV 2, 1.23456789e19 DIV 2;
--echo #
--echo # End of 5.5 tests
--echo #
--echo #
--echo # Start of 10.0 tests
--echo #
--echo #
--echo # MDEV-5781 Item_sum_std::val_real(): Assertion `nr >= 0.0' fails on query with STDDEV_POP, ROUND and variable
--echo #
SELECT STDDEV_POP(ROUND(0,@A:=2009)) FROM (SELECT 1 UNION SELECT 2) fake_table;
--echo #
--echo # End of 10.0 tests
--echo #

3
sql/item_func.cc
View File

@ -2666,6 +2666,9 @@ double my_double_round(double value, longlong dec, bool dec_unsigned,
volatile double value_div_tmp= value / tmp;
volatile double value_mul_tmp= value * tmp;
if (!dec_negative && my_isinf(tmp)) // "dec" is too large positive number
return value;
if (dec_negative && my_isinf(tmp))
tmp2= 0.0;
else if (!dec_negative && my_isinf(value_mul_tmp))