diff options
Diffstat (limited to 'src/backend/access/gist/gistxlog.c')
| -rw-r--r-- | src/backend/access/gist/gistxlog.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/backend/access/gist/gistxlog.c b/src/backend/access/gist/gistxlog.c index 88b97a4e487..cbda9e705cc 100644 --- a/src/backend/access/gist/gistxlog.c +++ b/src/backend/access/gist/gistxlog.c @@ -13,6 +13,7 @@ */ #include "postgres.h" +#include "access/bufmask.h" #include "access/gist_private.h" #include "access/xloginsert.h" #include "access/xlogutils.h" @@ -343,6 +344,48 @@ gist_xlog_cleanup(void) } /* + * Mask a Gist page before running consistency checks on it. + */ +void +gist_mask(char *pagedata, BlockNumber blkno) +{ + Page page = (Page) pagedata; + + mask_page_lsn(page); + + mask_page_hint_bits(page); + mask_unused_space(page); + + /* + * NSN is nothing but a special purpose LSN. Hence, mask it for the same + * reason as mask_page_lsn. + */ + GistPageSetNSN(page, (uint64) MASK_MARKER); + + /* + * We update F_FOLLOW_RIGHT flag on the left child after writing WAL + * record. Hence, mask this flag. See gistplacetopage() for details. + */ + GistMarkFollowRight(page); + + if (GistPageIsLeaf(page)) + { + /* + * In gist leaf pages, it is possible to modify the LP_FLAGS without + * emitting any WAL record. Hence, mask the line pointer flags. See + * gistkillitems() for details. + */ + mask_lp_flags(page); + } + + /* + * During gist redo, we never mark a page as garbage. Hence, mask it to + * ignore any differences. + */ + GistClearPageHasGarbage(page); +} + +/* * Write WAL record of a page split. */ XLogRecPtr |