diff options
Diffstat (limited to 'src/backend/access/gin/gininsert.c')
| -rw-r--r-- | src/backend/access/gin/gininsert.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/backend/access/gin/gininsert.c b/src/backend/access/gin/gininsert.c index 8681edefe67..d66c79cb8de 100644 --- a/src/backend/access/gin/gininsert.c +++ b/src/backend/access/gin/gininsert.c @@ -19,6 +19,7 @@ #include "catalog/index.h" #include "miscadmin.h" #include "storage/bufmgr.h" +#include "storage/smgr.h" #include "storage/indexfsm.h" #include "utils/memutils.h" @@ -412,6 +413,47 @@ ginbuild(PG_FUNCTION_ARGS) } /* + * ginbuildempty() -- build an empty gin index in the initialization fork + */ +Datum +ginbuildempty(PG_FUNCTION_ARGS) +{ + Relation index = (Relation) PG_GETARG_POINTER(0); + Buffer RootBuffer, + MetaBuffer; + + /* An empty GIN index has two pages. */ + MetaBuffer = + ReadBufferExtended(index, INIT_FORKNUM, P_NEW, RBM_NORMAL, NULL); + LockBuffer(MetaBuffer, BUFFER_LOCK_EXCLUSIVE); + RootBuffer = + ReadBufferExtended(index, INIT_FORKNUM, P_NEW, RBM_NORMAL, NULL); + LockBuffer(RootBuffer, BUFFER_LOCK_EXCLUSIVE); + + /* Initialize both pages, mark them dirty, unlock and release buffer. */ + START_CRIT_SECTION(); + GinInitMetabuffer(MetaBuffer); + MarkBufferDirty(MetaBuffer); + GinInitBuffer(RootBuffer, GIN_LEAF); + MarkBufferDirty(RootBuffer); + + /* XLOG the new pages */ + log_newpage(&index->rd_smgr->smgr_rnode.node, INIT_FORKNUM, + BufferGetBlockNumber(MetaBuffer), + BufferGetPage(MetaBuffer)); + log_newpage(&index->rd_smgr->smgr_rnode.node, INIT_FORKNUM, + BufferGetBlockNumber(RootBuffer), + BufferGetPage(RootBuffer)); + END_CRIT_SECTION(); + + /* Unlock and release the buffers. */ + UnlockReleaseBuffer(MetaBuffer); + UnlockReleaseBuffer(RootBuffer); + + PG_RETURN_VOID(); +} + +/* * Inserts value during normal insertion */ static uint32 |