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MDEV-10468 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()

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This commit is contained in:
Alexander Barkov 2016-08-08 18:37:02 +04:00
parent 1b3430a5ae
commit 5269d378df
3 changed files with 20 additions and 0 deletions
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12
mysql-test/r/func_group.result
View File

@ -2297,3 +2297,15 @@ FROM t1;
C_1 C_2 C_3 C_1 C_2 C_3
NULL 100 200 NULL 100 200
DROP TABLE t1; DROP TABLE t1;
#
# MDEV-10468 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()
#
SELECT STDDEV_POP(f) FROM (SELECT "1e+309" AS f UNION SELECT "-1e+309" AS f) tbl;
STDDEV_POP(f)
1.7976931348623157e308
Warnings:
Warning 1292 Truncated incorrect DOUBLE value: '1e+309'
Warning 1292 Truncated incorrect DOUBLE value: '-1e+309'
SELECT STDDEV(f) FROM (SELECT 1.7976931348623157e+308 AS f UNION SELECT -1.7976931348623157e+308 AS f) tbl;
STDDEV(f)
1.7976931348623157e308

6
mysql-test/t/func_group.test
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@ -1590,3 +1590,9 @@ SELECT
SUM(data3) AS C_3 SUM(data3) AS C_3
FROM t1; FROM t1;
DROP TABLE t1; DROP TABLE t1;
--echo #
--echo # MDEV-10468 Assertion `nr >= 0.0' failed in Item_sum_std::val_real()
--echo #
SELECT STDDEV_POP(f) FROM (SELECT "1e+309" AS f UNION SELECT "-1e+309" AS f) tbl;
SELECT STDDEV(f) FROM (SELECT 1.7976931348623157e+308 AS f UNION SELECT -1.7976931348623157e+308 AS f) tbl;

2
sql/item_sum.cc
View File

@ -1762,6 +1762,8 @@ double Item_sum_std::val_real()
{ {
DBUG_ASSERT(fixed == 1); DBUG_ASSERT(fixed == 1);
double nr= Item_sum_variance::val_real(); double nr= Item_sum_variance::val_real();
if (my_isinf(nr))
return DBL_MAX;
DBUG_ASSERT(nr >= 0.0); DBUG_ASSERT(nr >= 0.0);
return sqrt(nr); return sqrt(nr);
} }