C++ (Cpp) __curmetadata_metadata_search Exemples

Exemple #1

Fichier : cur_metadata.c Projet : lujudy/wiredtiger

/*
 * __curmetadata_search_near --
 *	WT_CURSOR->search_near method for the metadata cursor type.
 */
static int
__curmetadata_search_near(WT_CURSOR *cursor, int *exact)
{
	WT_CURSOR *file_cursor;
	WT_CURSOR_METADATA *mdc;
	WT_DECL_RET;
	WT_SESSION_IMPL *session;

	mdc = (WT_CURSOR_METADATA *)cursor;
	file_cursor = mdc->file_cursor;
	CURSOR_API_CALL(cursor, session,
	    search_near, ((WT_CURSOR_BTREE *)file_cursor)->btree);

	WT_MD_CURSOR_NEEDKEY(cursor);

	if (WT_STRING_MATCH(
	    (char *)cursor->key.data, "metadata:", cursor->key.size - 1)) {
		WT_ERR(__curmetadata_metadata_search(session, cursor));
		*exact = 1;
	} else {
		WT_ERR(file_cursor->search_near(file_cursor, exact));
		WT_MD_SET_KEY_VALUE(cursor, mdc, file_cursor);
	}

err:	if (ret != 0) {
		F_CLR(mdc, WT_MDC_POSITIONED | WT_MDC_ONMETADATA);
		F_CLR(cursor, WT_CURSTD_KEY_EXT | WT_CURSTD_VALUE_EXT);
	}
	API_END(session, ret);
	return (ret);
}

Exemple #2

Fichier : cur_metadata.c Projet : lujudy/wiredtiger

/*
 * __curmetadata_prev --
 *	WT_CURSOR->prev method for the metadata cursor type.
 */
static int
__curmetadata_prev(WT_CURSOR *cursor)
{
	WT_CURSOR *file_cursor;
	WT_CURSOR_METADATA *mdc;
	WT_DECL_RET;
	WT_SESSION_IMPL *session;

	mdc = (WT_CURSOR_METADATA *)cursor;
	file_cursor = mdc->file_cursor;
	CURSOR_API_CALL(cursor, session,
	    prev, ((WT_CURSOR_BTREE *)file_cursor)->btree);

	if (F_ISSET(mdc, WT_MDC_ONMETADATA)) {
		ret = WT_NOTFOUND;
		goto err;
	}

	ret = file_cursor->prev(file_cursor);
	if (ret == 0) {
		WT_MD_SET_KEY_VALUE(cursor, mdc, file_cursor);
	} else if (ret == WT_NOTFOUND)
		WT_ERR(__curmetadata_metadata_search(session, cursor));

err:	if (ret != 0) {
		F_CLR(mdc, WT_MDC_POSITIONED | WT_MDC_ONMETADATA);
		F_CLR(cursor, WT_CURSTD_KEY_EXT | WT_CURSTD_VALUE_EXT);
	}
	API_END(session, ret);
	return (ret);
}

Exemple #3

Fichier : cur_metadata.c Projet : GYGit/mongo

/*
 * __curmetadata_search_near --
 *	WT_CURSOR->search_near method for the metadata cursor type.
 */
static int
__curmetadata_search_near(WT_CURSOR *cursor, int *exact)
{
	WT_CURSOR *file_cursor;
	WT_CURSOR_METADATA *mdc;
	WT_DECL_RET;
	WT_SESSION_IMPL *session;

	mdc = (WT_CURSOR_METADATA *)cursor;
	file_cursor = mdc->file_cursor;
	CURSOR_API_CALL(cursor, session,
	    search_near, ((WT_CURSOR_BTREE *)file_cursor)->btree);

	WT_MD_CURSOR_NEEDKEY(cursor);

	if (WT_KEY_IS_METADATA(&cursor->key)) {
		WT_ERR(__curmetadata_metadata_search(session, cursor));
		*exact = 1;
	} else {
		WT_WITH_TXN_ISOLATION(session, WT_ISO_READ_UNCOMMITTED,
		    ret = file_cursor->search_near(file_cursor, exact));
		WT_ERR(ret);
		WT_ERR(__curmetadata_setkv(mdc, file_cursor));
	}

err:	if (ret != 0) {
		F_CLR(mdc, WT_MDC_POSITIONED | WT_MDC_ONMETADATA);
		F_CLR(cursor, WT_CURSTD_KEY_EXT | WT_CURSTD_VALUE_EXT);
	}
	API_END_RET(session, ret);
}

Exemple #4

Fichier : cur_metadata.c Projet : lujudy/wiredtiger

/*
 * __curmetadata_next --
 *	WT_CURSOR->next method for the metadata cursor type.
 */
static int
__curmetadata_next(WT_CURSOR *cursor)
{
	WT_CURSOR *file_cursor;
	WT_CURSOR_METADATA *mdc;
	WT_DECL_RET;
	WT_SESSION_IMPL *session;

	mdc = (WT_CURSOR_METADATA *)cursor;
	file_cursor = mdc->file_cursor;
	CURSOR_API_CALL(cursor, session,
	    next, ((WT_CURSOR_BTREE *)file_cursor)->btree);

	if (!F_ISSET(mdc, WT_MDC_POSITIONED))
		WT_ERR(__curmetadata_metadata_search(session, cursor));
	else {
		WT_ERR(file_cursor->next(mdc->file_cursor));
		WT_MD_SET_KEY_VALUE(cursor, mdc, file_cursor);
	}

err:	if (ret != 0) {
		F_CLR(mdc, WT_MDC_POSITIONED | WT_MDC_ONMETADATA);
		F_CLR(cursor, WT_CURSTD_KEY_EXT | WT_CURSTD_VALUE_EXT);
	}
	API_END(session, ret);
	return (ret);
}

Exemple #5

Fichier : cur_metadata.c Projet : GYGit/mongo

/*
 * __curmetadata_next --
 *	WT_CURSOR->next method for the metadata cursor type.
 */
static int
__curmetadata_next(WT_CURSOR *cursor)
{
	WT_CURSOR *file_cursor;
	WT_CURSOR_METADATA *mdc;
	WT_DECL_RET;
	WT_SESSION_IMPL *session;

	mdc = (WT_CURSOR_METADATA *)cursor;
	file_cursor = mdc->file_cursor;
	CURSOR_API_CALL(cursor, session,
	    next, ((WT_CURSOR_BTREE *)file_cursor)->btree);

	if (!F_ISSET(mdc, WT_MDC_POSITIONED))
		WT_ERR(__curmetadata_metadata_search(session, cursor));
	else {
		/*
		 * When applications open metadata cursors, they expect to see
		 * all schema-level operations reflected in the results.  Query
		 * at read-uncommitted to avoid confusion caused by the current
		 * transaction state.
		 */
		WT_WITH_TXN_ISOLATION(session, WT_ISO_READ_UNCOMMITTED,
		    ret = file_cursor->next(mdc->file_cursor));
		WT_ERR(ret);
		WT_ERR(__curmetadata_setkv(mdc, file_cursor));
	}

err:	if (ret != 0) {
		F_CLR(mdc, WT_MDC_POSITIONED | WT_MDC_ONMETADATA);
		F_CLR(cursor, WT_CURSTD_KEY_EXT | WT_CURSTD_VALUE_EXT);
	}
	API_END_RET(session, ret);
}