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On further reflection, we'd better do the same in int.c.

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We previously heard of the same problem in int24div(), so there's not a
good reason to suppose the problem is confined to cases involving int8.
This commit is contained in:
Tom Lane
2011-03-11 19:04:02 -05:00
parent 72330995a5
commit 2a26639a5d
1 changed files with 21 additions and 0 deletions
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21
src/backend/utils/adt/int.c
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@ -723,9 +723,13 @@ int4div(PG_FUNCTION_ARGS)
int32 result; int32 result;
if (arg2 == 0) if (arg2 == 0)
{
ereport(ERROR, ereport(ERROR,
(errcode(ERRCODE_DIVISION_BY_ZERO), (errcode(ERRCODE_DIVISION_BY_ZERO),
errmsg("division by zero"))); errmsg("division by zero")));
/* ensure compiler realizes we mustn't reach the division (gcc bug) */
PG_RETURN_NULL();
}
#ifdef WIN32 #ifdef WIN32
@ -864,9 +868,13 @@ int2div(PG_FUNCTION_ARGS)
int16 result; int16 result;
if (arg2 == 0) if (arg2 == 0)
{
ereport(ERROR, ereport(ERROR,
(errcode(ERRCODE_DIVISION_BY_ZERO), (errcode(ERRCODE_DIVISION_BY_ZERO),
errmsg("division by zero"))); errmsg("division by zero")));
/* ensure compiler realizes we mustn't reach the division (gcc bug) */
PG_RETURN_NULL();
}
result = arg1 / arg2; result = arg1 / arg2;
@ -1048,9 +1056,13 @@ int42div(PG_FUNCTION_ARGS)
int32 result; int32 result;
if (arg2 == 0) if (arg2 == 0)
{
ereport(ERROR, ereport(ERROR,
(errcode(ERRCODE_DIVISION_BY_ZERO), (errcode(ERRCODE_DIVISION_BY_ZERO),
errmsg("division by zero"))); errmsg("division by zero")));
/* ensure compiler realizes we mustn't reach the division (gcc bug) */
PG_RETURN_NULL();
}
result = arg1 / arg2; result = arg1 / arg2;
@ -1074,9 +1086,13 @@ int4mod(PG_FUNCTION_ARGS)
int32 arg2 = PG_GETARG_INT32(1); int32 arg2 = PG_GETARG_INT32(1);
if (arg2 == 0) if (arg2 == 0)
{
ereport(ERROR, ereport(ERROR,
(errcode(ERRCODE_DIVISION_BY_ZERO), (errcode(ERRCODE_DIVISION_BY_ZERO),
errmsg("division by zero"))); errmsg("division by zero")));
/* ensure compiler realizes we mustn't reach the division (gcc bug) */
PG_RETURN_NULL();
}
/* SELECT ((-2147483648)::int4) % (-1); causes a floating point exception */ /* SELECT ((-2147483648)::int4) % (-1); causes a floating point exception */
if (arg1 == INT_MIN && arg2 == -1) if (arg1 == INT_MIN && arg2 == -1)
@ -1094,9 +1110,14 @@ int2mod(PG_FUNCTION_ARGS)
int16 arg2 = PG_GETARG_INT16(1); int16 arg2 = PG_GETARG_INT16(1);
if (arg2 == 0) if (arg2 == 0)
{
ereport(ERROR, ereport(ERROR,
(errcode(ERRCODE_DIVISION_BY_ZERO), (errcode(ERRCODE_DIVISION_BY_ZERO),
errmsg("division by zero"))); errmsg("division by zero")));
/* ensure compiler realizes we mustn't reach the division (gcc bug) */
PG_RETURN_NULL();
}
/* No overflow is possible */ /* No overflow is possible */
PG_RETURN_INT16(arg1 % arg2); PG_RETURN_INT16(arg1 % arg2);