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Update C comments to mention SQL:2003 handling of power return values.

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This commit is contained in:
Bruce Momjian
2008-05-09 15:36:06 +00:00
parent c5f42ce8d5
commit 6e3e60095d
2 changed files with 8 additions and 5 deletions
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5
src/backend/utils/adt/float.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.155 2008/04/21 00:26:45 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/float.c,v 1.156 2008/05/09 15:36:06 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -1331,7 +1331,8 @@ dpow(PG_FUNCTION_ARGS)
/*
* The SQL spec requires that we emit a particular SQLSTATE error code for
* certain error conditions.
* 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))