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Fix for sparse ranges, get next ID from DB

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Instead of iterating thru potentially many nonexistent IDs
This commit is contained in:
Howard Chu 2011-06-01 01:44:51 -07:00
parent ea22849514
commit f5cb879aed
1 changed files with 34 additions and 0 deletions
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34
servers/slapd/back-bdb/search.c
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@ -310,6 +310,36 @@ sameido:
return rs->sr_err;
}
/* Get the next ID from the DB. Used if the candidate list is
* a range and simple iteration hits missing entryIDs
*/
static ID
bdb_get_nextid(struct bdb_info *bdb, DB_TXN *ltid, ID *cursor)
{
DBC *curs;
DBT key, data;
ID id, nid;
int rc;
id = *cursor + 1;
BDB_ID2DISK( id, &nid );
rc = bdb->bi_id2entry->bdi_db->cursor(
bdb->bi_id2entry->bdi_db, ltid, &curs, bdb->bi_db_opflags );
if ( rc )
return NOID;
key.data = &nid;
key.size = key.ulen = sizeof(ID);
key.flags = DB_DBT_USERMEM;
data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
data.dlen = data.ulen = 0;
rc = curs->c_get( curs, &key, &data, DB_SET_RANGE );
curs->c_close( curs );
if ( rc )
return NOID;
BDB_DISK2ID( &nid, cursor );
return *cursor;
}
int
bdb_search( Operation *op, SlapReply *rs )
{
@ -743,6 +773,10 @@ fetch_entry_retry:
LDAP_XSTRING(bdb_search)
": candidate %ld not found\n",
(long) id, 0, 0 );
} else {
/* get the next ID from the DB */
id = bdb_get_nextid( bdb, ltid, &cursor );
cursor = id - 1;
}
goto loop_continue;