database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-06 07:49:08 +03:00
Code Activity

Adjust power() error messages to be more descriptive.

Browse Source
This commit is contained in:
Bruce Momjian
2008-05-09 21:31:23 +00:00
parent 3159040627
commit f8df836ae3
2 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/backend/utils/adt/float.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.156 2008/05/09 15:36:06 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.157 2008/05/09 21:31:23 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1334,11 +1334,14 @@ dpow(PG_FUNCTION_ARGS)
* certain error conditions. Specifically, we don't return a divide-by-zero
* error code for 0 ^ -1.
*/
if ((arg1 == 0 && arg2 < 0) ||
(arg1 < 0 && floor(arg2) != arg2))
if (arg1 == 0 && arg2 < 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_ARGUMENT_FOR_POWER_FUNCTION),
errmsg("invalid argument for power function")));
errmsg("zero raised to a negative power is undefined")));
if (arg1 < 0 && floor(arg2) != arg2)
ereport(ERROR,
(errcode(ERRCODE_INVALID_ARGUMENT_FOR_POWER_FUNCTION),
errmsg("a negative number raised to a non-integer power yields a complex result")));
/*
* pow() sets errno only on some platforms, depending on whether it