diff options
Diffstat (limited to 'src/backend/access/nbtree/nbtutils.c')
| -rw-r--r-- | src/backend/access/nbtree/nbtutils.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c index c22ccec789d..8d047d8873f 100644 --- a/src/backend/access/nbtree/nbtutils.c +++ b/src/backend/access/nbtree/nbtutils.c @@ -2426,8 +2426,10 @@ new_prim_scan: /* * End this primitive index scan, but schedule another. * - * Note: If the scan direction happens to change, this scheduled primitive - * index scan won't go ahead after all. + * Note: We make a soft assumption that the current scan direction will + * also be used within _bt_next, when it is asked to step off this page. + * It is up to _bt_next to cancel this scheduled primitive index scan + * whenever it steps to a page in the direction opposite currPos.dir. */ pstate->continuescan = false; /* Tell _bt_readpage we're done... */ so->needPrimScan = true; /* ...but call _bt_first again */ |