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60 lines
2 KiB
C
60 lines
2 KiB
C
/*****************************************************************************
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Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/que0types.h
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Query graph global types
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Created 5/27/1996 Heikki Tuuri
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*******************************************************/
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#ifndef que0types_h
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#define que0types_h
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#include "data0data.h"
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#include "dict0types.h"
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/* Pseudotype for all graph nodes */
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typedef void que_node_t;
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typedef struct que_fork_struct que_fork_t;
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/* Query graph root is a fork node */
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typedef que_fork_t que_t;
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typedef struct que_thr_struct que_thr_t;
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typedef struct que_common_struct que_common_t;
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/* Common struct at the beginning of each query graph node; the name of this
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substruct must be 'common' */
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struct que_common_struct{
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ulint type; /*!< query node type */
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que_node_t* parent; /*!< back pointer to parent node, or NULL */
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que_node_t* brother;/* pointer to a possible brother node */
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dfield_t val; /*!< evaluated value for an expression */
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ulint val_buf_size;
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/* buffer size for the evaluated value data,
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if the buffer has been allocated dynamically:
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if this field is != 0, and the node is a
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symbol node or a function node, then we
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have to free the data field in val
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explicitly */
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};
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#endif
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