database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-31 22:04:40 +03:00
Code Activity

Fix PageGetExactFreeSpace() so that it actually behaves sensibly

Browse Source 
if pd_lower > pd_upper, rather than merely claiming to.  This would
only matter if the page header were corrupt, which shouldn't occur,
but ...
This commit is contained in:
Tom Lane
2008-02-10 20:39:08 +00:00
parent 0028b22d68
commit 082aca9ec2
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/backend/storage/page/bufpage.c
View File

@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/page/bufpage.c,v 1.77 2008/01/01 19:45:52 momjian Exp $ * $PostgreSQL: pgsql/src/backend/storage/page/bufpage.c,v 1.78 2008/02/10 20:39:08 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -489,6 +489,9 @@ PageGetExactFreeSpace(Page page)
space = (int) ((PageHeader) page)->pd_upper - space = (int) ((PageHeader) page)->pd_upper -
(int) ((PageHeader) page)->pd_lower; (int) ((PageHeader) page)->pd_lower;
if (space < 0)
return 0;
return (Size) space; return (Size) space;
} }