diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtree.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtree.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/backend/access/nbtree/nbtree.c b/src/backend/access/nbtree/nbtree.c index 655a40090e9..a13d629b0ef 100644 --- a/src/backend/access/nbtree/nbtree.c +++ b/src/backend/access/nbtree/nbtree.c @@ -29,6 +29,7 @@ #include "storage/indexfsm.h" #include "storage/ipc.h" #include "storage/lmgr.h" +#include "storage/smgr.h" #include "utils/memutils.h" @@ -205,6 +206,36 @@ btbuildCallback(Relation index, } /* + * btbuildempty() -- build an empty btree index in the initialization fork + */ +Datum +btbuildempty(PG_FUNCTION_ARGS) +{ + Relation index = (Relation) PG_GETARG_POINTER(0); + Page metapage; + + /* Construct metapage. */ + metapage = (Page) palloc(BLCKSZ); + _bt_initmetapage(metapage, P_NONE, 0); + + /* Write the page. If archiving/streaming, XLOG it. */ + smgrwrite(index->rd_smgr, INIT_FORKNUM, BTREE_METAPAGE, + (char *) metapage, true); + if (XLogIsNeeded()) + log_newpage(&index->rd_smgr->smgr_rnode.node, INIT_FORKNUM, + BTREE_METAPAGE, metapage); + + /* + * An immediate sync is require even if we xlog'd the page, because the + * write did not go through shared_buffers and therefore a concurrent + * checkpoint may have move the redo pointer past our xlog record. + */ + smgrimmedsync(index->rd_smgr, INIT_FORKNUM); + + PG_RETURN_VOID(); +} + +/* * btinsert() -- insert an index tuple into a btree. * * Descend the tree recursively, find the appropriate location for our |