Improve dpow() check for ERANGE overflow for HPPA.

diff --git a/src/backend/utils/adt/float.c b/src/backend/utils/adt/float.c
index 9cda3706afa4da887246dc6bf8af91edfd856021..ef2da34a80e9fb1213b81db6eb7a7df6f93f61ed 100644 (file)
--- a/src/backend/utils/adt/float.c
+++ b/src/backend/utils/adt/float.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.143 2007/01/06 02:28:38 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.144 2007/01/06 04:14:55 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1459,10 +1459,9 @@ dpow(PG_FUNCTION_ARGS)
        else
            result = 1;
    }
-   else if (errno == ERANGE)
-   {
-       result = (arg1 >= 0) ? get_float8_infinity() : -get_float8_infinity();
-   }
+   /* Some platoforms, e.g. HPPA, return ERANGE, but HUGE_VAL, not Inf */
+   else if (errno == ERANGE && !isinf(result))
+       result = get_float8_infinity();
    
    CHECKFLOATVAL(result, isinf(arg1) || isinf(arg2), arg1 == 0);
    PG_RETURN_FLOAT8(result);