1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
/******************************************************
Query graph global types
(c) 1996 Innobase Oy
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;
typedef struct que_fork_struct que_fork_t;
/* Query graph root is a fork node */
typedef que_fork_t que_t;
typedef struct que_thr_struct que_thr_t;
typedef struct que_common_struct que_common_t;
/* Common struct at the beginning of each query graph node; the name of this
substruct must be 'common' */
struct que_common_struct{
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
|
