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/*****************************************************************************
Copyright (c) 1996, 2009, Oracle and/or its affiliates. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file include/que0types.h
Query graph global types
Created 5/27/1996 Heikki Tuuri
*******************************************************/
#ifndef que0types_h
#define que0types_h
#include "data0data.h"
#include "dict0types.h"
/* Pseudotype for all graph nodes */
typedef void que_node_t;
/* Query graph root is a fork node */
typedef struct que_fork_t que_t;
struct que_thr_t;
/* Common struct at the beginning of each query graph node; the name of this
substruct must be 'common' */
struct que_common_t{
ulint type; /*!< query node type */
que_node_t* parent; /*!< back pointer to parent node, or NULL */
que_node_t* brother;/* pointer to a possible brother node */
dfield_t val; /*!< evaluated value for an expression */
ulint val_buf_size;
/* buffer size for the evaluated value data,
if the buffer has been allocated dynamically:
if this field is != 0, and the node is a
symbol node or a function node, then we
have to free the data field in val
explicitly */
};
#endif
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