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Apply fix so pow() and exp() ERANGE is used only if result is not 0.

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This commit is contained in:
Bruce Momjian 2007-01-06 20:21:29 +00:00
parent 282f7f2eac
commit f0f4a6d781
1 changed files with 3 additions and 3 deletions
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6
src/backend/utils/adt/float.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.145 2007/01/06 15:18:02 momjian Exp $ * $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.146 2007/01/06 20:21:29 momjian Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -1459,7 +1459,7 @@ dpow(PG_FUNCTION_ARGS)
else else
result = 1; result = 1;
} }
else if (errno == ERANGE && !isinf(result)) else if (errno == ERANGE && result != 0 && !isinf(result))
result = get_float8_infinity(); result = get_float8_infinity();
CHECKFLOATVAL(result, isinf(arg1) || isinf(arg2), arg1 == 0); CHECKFLOATVAL(result, isinf(arg1) || isinf(arg2), arg1 == 0);
@ -1478,7 +1478,7 @@ dexp(PG_FUNCTION_ARGS)
errno = 0; errno = 0;
result = exp(arg1); result = exp(arg1);
if (errno == ERANGE && !isinf(result)) if (errno == ERANGE && result != 0 && !isinf(result))
result = get_float8_infinity(); result = get_float8_infinity();
CHECKFLOATVAL(result, isinf(arg1), false); CHECKFLOATVAL(result, isinf(arg1), false);