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MCOL-4247 TYpecast causes wrong virtual function

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This commit is contained in:
David Hall
2020-08-17 17:34:58 -05:00
parent a2be47b4c7
commit 7ba40a5544
1 changed files with 35 additions and 46 deletions
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81
dbcon/mysql/ha_mcs_impl.cpp
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@ -770,22 +770,28 @@ int fetchNextRow(uchar* buf, cal_table_info& ti, cal_connection_info* ci, bool h
if (dl == std::numeric_limits<double>::infinity())
continue;
Field_double* f2 = (Field_double*)*f;
// bug 3483, reserve enough space for the longest double value
// -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and
// 2.2250738585072014E-308 to 1.7976931348623157E+308.
(*f)->field_length = 310;
// 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);
if ((*f)->type() == MYSQL_TYPE_NEWDECIMAL)
{
char buf[310];
// reserve enough space for the longest double value
// -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and
// 2.2250738585072014E-308 to 1.7976931348623157E+308.
snprintf(buf, 310, "%.18g", dl);
(*f)->store(buf, strlen(buf), (*f)->charset());
}
else
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.
(*f)->field_length = 310;
if (dl == 0)
float8store((*f)->ptr,dl);
else
(*f)->store(dl);
}
if ((*f)->null_ptr)
*(*f)->null_ptr &= ~(*f)->null_bit;
@ -800,39 +806,22 @@ int fetchNextRow(uchar* buf, cal_table_info& ti, cal_connection_info* ci, bool h
continue;
}
switch((*f)->type())
if ((*f)->type() == MYSQL_TYPE_NEWDECIMAL)
{
case MYSQL_TYPE_NEWDECIMAL:
{
char buf[310];
Field_new_decimal* f2 = (Field_new_decimal*)*f;
snprintf(buf, 310, "%.20Lg", dl);
f2->store(buf, strlen(buf), f2->charset());
if ((*f)->null_ptr)
*(*f)->null_ptr &= ~(*f)->null_bit;
}
break;
case MYSQL_TYPE_DOUBLE:
{
Field_double* f2 = (Field_double*)*f;
// bug 3483, reserve enough space for the longest double value
// -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and
// 2.2250738585072014E-308 to 1.7976931348623157E+308.
(*f)->field_length = 310;
f2->store(static_cast<double>(dl));
if ((*f)->null_ptr)
*(*f)->null_ptr &= ~(*f)->null_bit;
}
break;
default:
{
continue; // Shouldn't happen. Functions should not return long double to other than double or decimal return type.
}
char buf[310];
snprintf(buf, 310, "%.20Lg", dl);
(*f)->store(buf, strlen(buf), (*f)->charset());
}
break;
else
{
// reserve enough space for the longest double value
// -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and
// 2.2250738585072014E-308 to 1.7976931348623157E+308.
(*f)->field_length = 310;
(*f)->store(static_cast<double>(dl));
}
if ((*f)->null_ptr)
*(*f)->null_ptr &= ~(*f)->null_bit;
}
case CalpontSystemCatalog::DECIMAL: