Fix wrong WAL info value generated when gistContinueInsert() performs an

index page split.  This would result in index corruption, or even more likely
an error during WAL replay, if we were unlucky enough to crash during
end-of-recovery cleanup after having completed an incomplete GIST insertion.

Yoichi Hirai

diff --git a/src/backend/access/gist/gistxlog.c b/src/backend/access/gist/gistxlog.c
index 7a9f8934cf4e008303de3f38bf73b2757c62511b..d6aeb22f3c54060fa108a9d4038b169c1aa5515d 100644 (file)
--- a/src/backend/access/gist/gistxlog.c
+++ b/src/backend/access/gist/gistxlog.c
@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *          $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.33 2009/12/19 01:32:32 sriggs Exp $
+ *          $PostgreSQL: pgsql/src/backend/access/gist/gistxlog.c,v 1.34 2009/12/24 17:52:04 tgl Exp $
  *-------------------------------------------------------------------------
  */
 #include "postgres.h"
@@ -650,6 +650,7 @@ gistContinueInsert(gistIncompleteInsert *insert)
            int         j,
                        k,
                        pituplen = 0;
+           uint8       xlinfo;
            XLogRecData *rdata;
            XLogRecPtr  recptr;
            Buffer      tempbuffer = InvalidBuffer;
@@ -738,6 +739,7 @@ gistContinueInsert(gistIncompleteInsert *insert)
                for (j = 0; j < ntodelete; j++)
                    PageIndexTupleDelete(pages[0], todelete[j]);
 
+               xlinfo = XLOG_GIST_PAGE_SPLIT;
                rdata = formSplitRdata(index->rd_node, insert->path[i],
                                       false, &(insert->key),
                                     gistMakePageLayout(buffers, numbuffer));
@@ -751,6 +753,7 @@ gistContinueInsert(gistIncompleteInsert *insert)
                    PageIndexTupleDelete(pages[0], todelete[j]);
                gistfillbuffer(pages[0], itup, lenitup, InvalidOffsetNumber);
 
+               xlinfo = XLOG_GIST_PAGE_UPDATE;
                rdata = formUpdateRdata(index->rd_node, buffers[0],
                                        todelete, ntodelete,
                                        itup, lenitup, &(insert->key));
@@ -767,7 +770,7 @@ gistContinueInsert(gistIncompleteInsert *insert)
                GistPageGetOpaque(pages[j])->rightlink = InvalidBlockNumber;
                MarkBufferDirty(buffers[j]);
            }
-           recptr = XLogInsert(RM_GIST_ID, XLOG_GIST_PAGE_UPDATE, rdata);
+           recptr = XLogInsert(RM_GIST_ID, xlinfo, rdata);
            for (j = 0; j < numbuffer; j++)
            {
                PageSetLSN(pages[j], recptr);