diff options
Diffstat (limited to 'src/backend/access/gist/gistutil.c')
| -rw-r--r-- | src/backend/access/gist/gistutil.c | 31 |
1 files changed, 5 insertions, 26 deletions
diff --git a/src/backend/access/gist/gistutil.c b/src/backend/access/gist/gistutil.c index 765329bbcd..dd975b164c 100644 --- a/src/backend/access/gist/gistutil.c +++ b/src/backend/access/gist/gistutil.c @@ -1004,44 +1004,23 @@ gistproperty(Oid index_oid, int attno, } /* - * Some indexes are not WAL-logged, but we need LSNs to detect concurrent page - * splits anyway. This function provides a fake sequence of LSNs for that - * purpose. + * Temporary and unlogged GiST indexes are not WAL-logged, but we need LSNs + * to detect concurrent page splits anyway. This function provides a fake + * sequence of LSNs for that purpose. */ XLogRecPtr gistGetFakeLSN(Relation rel) { + static XLogRecPtr counter = FirstNormalUnloggedLSN; + if (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP) { /* * Temporary relations are only accessible in our session, so a simple * backend-local counter will do. */ - static XLogRecPtr counter = FirstNormalUnloggedLSN; - return counter++; } - else if (rel->rd_rel->relpersistence == RELPERSISTENCE_PERMANENT) - { - /* - * WAL-logging on this relation will start after commit, so its LSNs - * must be distinct numbers smaller than the LSN at the next commit. - * Emit a dummy WAL record if insert-LSN hasn't advanced after the - * last call. - */ - static XLogRecPtr lastlsn = InvalidXLogRecPtr; - XLogRecPtr currlsn = GetXLogInsertRecPtr(); - - /* Shouldn't be called for WAL-logging relations */ - Assert(!RelationNeedsWAL(rel)); - - /* No need for an actual record if we already have a distinct LSN */ - if (!XLogRecPtrIsInvalid(lastlsn) && lastlsn == currlsn) - currlsn = gistXLogAssignLSN(); - - lastlsn = currlsn; - return currlsn; - } else { /* |