diff options
Diffstat (limited to 'src/backend/access/gist/gistutil.c')
| -rw-r--r-- | src/backend/access/gist/gistutil.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/src/backend/access/gist/gistutil.c b/src/backend/access/gist/gistutil.c index e5c3d69fca..f7d50ddb71 100644 --- a/src/backend/access/gist/gistutil.c +++ b/src/backend/access/gist/gistutil.c @@ -798,16 +798,30 @@ gistoptions(PG_FUNCTION_ARGS) } /* - * Temporary GiST indexes are not WAL-logged, but we need LSNs to detect - * concurrent page splits anyway. GetXLogRecPtrForTemp() provides a fake - * sequence of LSNs for that purpose. Each call generates an LSN that is - * greater than any previous value returned by this function in the same - * session. + * 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 -GetXLogRecPtrForTemp(void) +gistGetFakeLSN(Relation rel) { static XLogRecPtr counter = 1; - counter++; - return counter; + + if (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP) + { + /* + * Temporary relations are only accessible in our session, so a + * simple backend-local counter will do. + */ + return counter++; + } + else + { + /* + * Unlogged relations are accessible from other backends, and survive + * (clean) restarts. GetFakeLSNForUnloggedRel() handles that for us. + */ + Assert(rel->rd_rel->relpersistence == RELPERSISTENCE_UNLOGGED); + return GetFakeLSNForUnloggedRel(); + } } |