/*
* __wt_page_obsolete --
* Discard all obsolete updates on a row-store leaf page.
*/
void
__wt_row_leaf_obsolete(WT_SESSION_IMPL *session, WT_PAGE *page)
{
WT_INSERT *ins;
WT_ROW *rip;
WT_UPDATE *upd;
uint32_t i;
/* For entries before the first on-page record... */
WT_SKIP_FOREACH(ins, WT_ROW_INSERT_SMALLEST(page))
if ((upd =
__wt_update_obsolete_check(session, ins->upd)) != NULL)
__wt_update_obsolete_free(session, page, upd);
/* For each entry on the page... */
WT_ROW_FOREACH(page, rip, i) {
if ((upd = __wt_update_obsolete_check(
session, WT_ROW_UPDATE(page, rip))) != NULL)
__wt_update_obsolete_free(session, page, upd);
WT_SKIP_FOREACH(ins, WT_ROW_INSERT(page, rip))
if ((upd = __wt_update_obsolete_check(
session, ins->upd)) != NULL)
__wt_update_obsolete_free(session, page, upd);
}
}
/*
* __txn_abort_newer_row_leaf --
* Abort updates on a row leaf page with timestamps newer than the
* rollback timestamp.
*/
static void
__txn_abort_newer_row_leaf(
WT_SESSION_IMPL *session, WT_PAGE *page, wt_timestamp_t *rollback_timestamp)
{
WT_INSERT_HEAD *insert;
WT_ROW *rip;
WT_UPDATE *upd;
uint32_t i;
/*
* Review the insert list for keys before the first entry on the disk
* page.
*/
if ((insert = WT_ROW_INSERT_SMALLEST(page)) != NULL)
__txn_abort_newer_row_skip(
session, insert, rollback_timestamp);
/*
* Review updates that belong to keys that are on the disk image,
* as well as for keys inserted since the page was read from disk.
*/
WT_ROW_FOREACH(page, rip, i) {
if ((upd = WT_ROW_UPDATE(page, rip)) != NULL)
__txn_abort_newer_update(
session, upd, rollback_timestamp);
if ((insert = WT_ROW_INSERT(page, rip)) != NULL)
__txn_abort_newer_row_skip(
session, insert, rollback_timestamp);
}
}