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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2001-2002
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: db_truncate.c,v 11.185 2002/08/07 16:16:48 bostic Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/btree.h"
#include "dbinc/hash.h"
#include "dbinc/qam.h"
/*
* __db_truncate
* truncate method for DB.
*
* PUBLIC: int __db_truncate __P((DB *, DB_TXN *, u_int32_t *, u_int32_t));
*/
int
__db_truncate(dbp, txn, countp, flags)
DB *dbp;
DB_TXN *txn;
u_int32_t *countp, flags;
{
DB_ENV *dbenv;
int ret, t_ret, txn_local;
dbenv = dbp->dbenv;
ret = txn_local = 0;
PANIC_CHECK(dbenv);
/* Check for invalid flags. */
if ((ret =
__db_fchk(dbenv, "DB->truncate", flags, DB_AUTO_COMMIT)) != 0)
return (ret);
/*
* Create local transaction as necessary, check for consistent
* transaction usage.
*/
if (IS_AUTO_COMMIT(dbenv, txn, flags)) {
if ((ret = __db_txn_auto(dbp, &txn)) != 0)
return (ret);
txn_local = 1;
} else
if (txn != NULL && !TXN_ON(dbenv))
return (__db_not_txn_env(dbenv));
DB_TEST_RECOVERY(dbp, DB_TEST_PREDESTROY, ret, NULL);
switch (dbp->type) {
case DB_BTREE:
case DB_RECNO:
if ((ret = __bam_truncate(dbp, txn, countp)) != 0)
goto err;
break;
case DB_HASH:
if ((ret = __ham_truncate(dbp, txn, countp)) != 0)
goto err;
break;
case DB_QUEUE:
if ((ret = __qam_truncate(dbp, txn, countp)) != 0)
goto err;
break;
default:
ret = __db_unknown_type(
dbenv, "__db_truncate", dbp->type);
goto err;
}
DB_TEST_RECOVERY(dbp, DB_TEST_POSTDESTROY, ret, NULL);
DB_TEST_RECOVERY_LABEL
err:
/* Commit for DB_AUTO_COMMIT. */
if (txn_local) {
if (ret == 0)
ret = txn->commit(txn, 0);
else
if ((t_ret = txn->abort(txn)) != 0)
ret = __db_panic(dbenv, t_ret);
}
return (ret);
}
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