Пример #1
0
/*
 * __wt_schema_drop --
 *	Process a WT_SESSION::drop operation for all supported types.
 */
int
__wt_schema_drop(WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
    WT_CONFIG_ITEM cval;
    WT_DATA_SOURCE *dsrc;
    WT_DECL_RET;
    bool force;

    WT_RET(__wt_config_gets_def(session, cfg, "force", 0, &cval));
    force = cval.val != 0;

    WT_RET(__wt_meta_track_on(session));

    /* Paranoia: clear any handle from our caller. */
    session->dhandle = NULL;

    if (WT_PREFIX_MATCH(uri, "colgroup:"))
        ret = __drop_colgroup(session, uri, force, cfg);
    else if (WT_PREFIX_MATCH(uri, "file:"))
        ret = __drop_file(session, uri, force, cfg);
    else if (WT_PREFIX_MATCH(uri, "index:"))
        ret = __drop_index(session, uri, force, cfg);
    else if (WT_PREFIX_MATCH(uri, "lsm:"))
        ret = __wt_lsm_tree_drop(session, uri, cfg);
    else if (WT_PREFIX_MATCH(uri, "table:"))
        ret = __drop_table(session, uri, cfg);
    else if ((dsrc = __wt_schema_get_source(session, uri)) != NULL)
        ret = dsrc->drop == NULL ?
              __wt_object_unsupported(session, uri) :
              dsrc->drop(
                  dsrc, &session->iface, uri, (WT_CONFIG_ARG *)cfg);
    else
        ret = __wt_bad_object_type(session, uri);

    /*
     * Map WT_NOTFOUND to ENOENT, based on the assumption WT_NOTFOUND means
     * there was no metadata entry.  Map ENOENT to zero if force is set.
     */
    if (ret == WT_NOTFOUND || ret == ENOENT)
        ret = force ? 0 : ENOENT;

    /* Bump the schema generation so that stale data is ignored. */
    ++S2C(session)->schema_gen;

    WT_TRET(__wt_meta_track_off(session, true, ret != 0));

    return (ret);
}
Пример #2
0
int
__wt_schema_drop(WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
	WT_CONFIG_ITEM cval;
	WT_DATA_SOURCE *dsrc;
	WT_DECL_RET;
	int force;

	WT_RET(__wt_config_gets_defno(session, cfg, "force", &cval));
	force = (cval.val != 0);

	/* Disallow drops from the WiredTiger name space. */
	WT_RET(__wt_schema_name_check(session, uri));

	WT_RET(__wt_meta_track_on(session));

	/* Be careful to ignore any btree handle in our caller. */
	WT_CLEAR_BTREE_IN_SESSION(session);

	if (WT_PREFIX_MATCH(uri, "colgroup:"))
		ret = __drop_colgroup(session, uri, cfg);
	else if (WT_PREFIX_MATCH(uri, "file:"))
		ret = __drop_file(session, uri, force, cfg);
	else if (WT_PREFIX_MATCH(uri, "index:"))
		ret = __drop_index(session, uri, cfg);
	else if (WT_PREFIX_MATCH(uri, "table:"))
		ret = __drop_table(session, uri, force, cfg);
	else if ((ret = __wt_schema_get_source(session, uri, &dsrc)) == 0)
		ret = dsrc->drop(dsrc, &session->iface, uri, cfg);

	/*
	 * Map WT_NOTFOUND to ENOENT (or to 0 if "force" is set), based on the
	 * assumption WT_NOTFOUND means there was no metadata entry.  The
	 * underlying drop functions should handle this case (we passed them
	 * the "force" value), but better safe than sorry.
	 */
	if (ret == WT_NOTFOUND)
		ret = force ? 0 : ENOENT;

	/* Bump the schema generation so that stale data is ignored. */
	++S2C(session)->schema_gen;

	WT_TRET(__wt_meta_track_off(session, ret != 0));

	return (ret);
}