1/*-
2 * See the file LICENSE for redistribution information.
3 *
4 * Copyright (c) 1998,2008 Oracle.  All rights reserved.
5 *
6 * $Id: db_join.h,v 12.8 2008/01/08 20:58:17 bostic Exp $
7 */
8
9#ifndef _DB_JOIN_H_
10#define	_DB_JOIN_H_
11
12#if defined(__cplusplus)
13extern "C" {
14#endif
15
16/*
17 * Joins use a join cursor that is similar to a regular DB cursor except
18 * that it only supports c_get and c_close functionality.  Also, it does
19 * not support the full range of flags for get.
20 */
21typedef struct __join_cursor {
22	u_int8_t *j_exhausted;	/* Array of flags; is cursor i exhausted? */
23	DBC	**j_curslist;	/* Array of cursors in the join: constant. */
24	DBC	**j_fdupcurs;	/* Cursors w/ first instances of current dup. */
25	DBC	**j_workcurs;	/* Scratch cursor copies to muck with. */
26	DB	 *j_primary;	/* Primary dbp. */
27	DBT	  j_key;	/* Used to do lookups. */
28	DBT	  j_rdata;	/* Memory used for data return. */
29	u_int32_t j_ncurs;	/* How many cursors do we have? */
30#define	JOIN_RETRY	0x01	/* Error on primary get; re-return same key. */
31	u_int32_t flags;
32} JOIN_CURSOR;
33
34#if defined(__cplusplus)
35}
36#endif
37#endif /* !_DB_JOIN_H_ */
38