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MDEV-10467 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()

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Backporting MDEV-5781 from 10.0.
This commit is contained in:
Alexander Barkov
2016-08-03 15:55:48 +04:00
parent 35c9c85634
commit ecb7ce7844
3 changed files with 27 additions and 0 deletions
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12
mysql-test/r/func_math.result
View File

@@ -761,3 +761,15 @@ select 5 div 2.0;
select 5.9 div 2, 1.23456789e3 DIV 2, 1.23456789e9 DIV 2, 1.23456789e19 DIV 2; 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 5.9 div 2 1.23456789e3 DIV 2 1.23456789e9 DIV 2 1.23456789e19 DIV 2
2 617 617283945 6172839450000000000 2 617 617283945 6172839450000000000
#
# MDEV-10467 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()
#
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT STDDEV_SAMP(ROUND('0', 309)) FROM t1;
STDDEV_SAMP(ROUND('0', 309))
0
DROP TABLE t1;
#
# End of 5.5 tests
#

12
mysql-test/t/func_math.test
View File

@@ -567,3 +567,15 @@ select 5.0 div 2.0;
select 5.0 div 2; select 5.0 div 2;
select 5 div 2.0; select 5 div 2.0;
select 5.9 div 2, 1.23456789e3 DIV 2, 1.23456789e9 DIV 2, 1.23456789e19 DIV 2; select 5.9 div 2, 1.23456789e3 DIV 2, 1.23456789e9 DIV 2, 1.23456789e19 DIV 2;
--echo #
--echo # MDEV-10467 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()
--echo #
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (1),(2);
SELECT STDDEV_SAMP(ROUND('0', 309)) FROM t1;
DROP TABLE t1;
--echo #
--echo # End of 5.5 tests
--echo #

3
sql/item_func.cc
View File

@@ -2661,6 +2661,9 @@ double my_double_round(double value, longlong dec, bool dec_unsigned,
volatile double value_div_tmp= value / tmp; volatile double value_div_tmp= value / tmp;
volatile double value_mul_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)) if (dec_negative && my_isinf(tmp))
tmp2= 0.0; tmp2= 0.0;
else if (!dec_negative && my_isinf(value_mul_tmp)) else if (!dec_negative && my_isinf(value_mul_tmp))