Make factorial(0) return 1, as per spec.

diff --git a/src/backend/utils/adt/int.c b/src/backend/utils/adt/int.c
index e04ae89cea059207f5d7a2466025225d4caa8a19..99c6155847496adaad59a9f95aa87adcf676eff9 100644 (file)
--- a/src/backend/utils/adt/int.c
+++ b/src/backend/utils/adt/int.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.47 2001/06/07 00:09:29 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.48 2002/02/23 01:01:30 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -784,7 +784,9 @@ int4fac(PG_FUNCTION_ARGS)
        int32           arg1 = PG_GETARG_INT32(0);
        int32           result;
 
-       if (arg1 < 1)
+       if (arg1 == 0)
+               result = 1;
+       else if (arg1 < 1)
                result = 0;
        else
                for (result = 1; arg1 > 0; --arg1)

diff --git a/src/backend/utils/adt/int8.c b/src/backend/utils/adt/int8.c
index 380e02382380c5e81bf4b8d9f4d0eec436d334ad..6a5eb15d749b5efaf76f366bcf52b0ebc719073d 100644 (file)
--- a/src/backend/utils/adt/int8.c
+++ b/src/backend/utils/adt/int8.c
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/utils/adt/int8.c,v 1.36 2001/11/24 19:57:06 tgl Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/utils/adt/int8.c,v 1.37 2002/02/23 01:01:30 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -515,7 +515,9 @@ int8fac(PG_FUNCTION_ARGS)
        int64           result;
        int64           i;
 
-       if (arg1 < 1)
+       if (arg1 == 0)
+               result = 1;
+       else if (arg1 < 1)
                result = 0;
        else
                for (i = arg1, result = 1; i > 0; --i)