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Preserve the sign when a double is -0 in fetchNextRow()

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This commit is contained in:
Gagan Goel
2019-09-19 15:47:07 -04:00
parent 3ce8f98f40
commit abea9481b7
1 changed files with 9 additions and 1 deletions
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10
dbcon/mysql/ha_calpont_impl.cpp
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@ -766,7 +766,15 @@ int fetchNextRow(uchar* buf, cal_table_info& ti, cal_connection_info* ci, bool h
// 2.2250738585072014E-308 to 1.7976931348623157E+308.
(*f)->field_length = 310;
f2->store(dl);
// The server converts dl=-0 to dl=0 in f2->store().
// This happens in the call to truncate_double().
// This is an unexpected behaviour, so we directly store the
// double value using the lower level float8store() function.
// TODO Remove this when f2->store() handles this properly.
if (dl == 0)
float8store(f2->ptr,dl);
else
f2->store(dl);
if ((*f)->null_ptr)
*(*f)->null_ptr &= ~(*f)->null_bit;