diff options
Diffstat (limited to 'src/backend/utils/adt/float.c')
| -rw-r--r-- | src/backend/utils/adt/float.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c index 6522c0816ef..88215d910a5 100644 --- a/src/backend/utils/adt/float.c +++ b/src/backend/utils/adt/float.c @@ -1566,14 +1566,15 @@ dpow(PG_FUNCTION_ARGS) * pow() sets errno only on some platforms, depending on whether it * follows _IEEE_, _POSIX_, _XOPEN_, or _SVID_, so we try to avoid using * errno. However, some platform/CPU combinations return errno == EDOM - * and result == Nan for negative arg1 and very large arg2 (they must be + * and result == NaN for negative arg1 and very large arg2 (they must be * using something different from our floor() test to decide it's * invalid). Other platforms (HPPA) return errno == ERANGE and a large - * (HUGE_VAL) but finite result to signal overflow. + * (HUGE_VAL) but finite result to signal overflow. Also, some versions + * of MSVC return errno == EDOM and result == NaN for NaN inputs. */ errno = 0; result = pow(arg1, arg2); - if (errno == EDOM && isnan(result)) + if (errno == EDOM && isnan(result) && !isnan(arg1) && !isnan(arg2)) { if ((fabs(arg1) > 1 && arg2 >= 0) || (fabs(arg1) < 1 && arg2 < 0)) /* The sign of Inf is not significant in this case. */ |