que0types.h
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- /******************************************************
- 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