eval0eval.h
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上传日期:2022-05-23
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文件大小:3k
- /******************************************************
- SQL evaluator: evaluates simple data structures, like expressions, in
- a query graph
- (c) 1997 Innobase Oy
- Created 12/29/1997 Heikki Tuuri
- *******************************************************/
- #ifndef eval0eval_h
- #define eval0eval_h
- #include "univ.i"
- #include "que0types.h"
- #include "pars0sym.h"
- #include "pars0pars.h"
- /*********************************************************************
- Free the buffer from global dynamic memory for a value of a que_node,
- if it has been allocated in the above function. The freeing for pushed
- column values is done in sel_col_prefetch_buf_free. */
- void
- eval_node_free_val_buf(
- /*===================*/
- que_node_t* node); /* in: query graph node */
- /*********************************************************************
- Evaluates a symbol table symbol. */
- UNIV_INLINE
- void
- eval_sym(
- /*=====*/
- sym_node_t* sym_node); /* in: symbol table node */
- /*********************************************************************
- Evaluates an expression. */
- UNIV_INLINE
- void
- eval_exp(
- /*=====*/
- que_node_t* exp_node); /* in: expression */
- /*********************************************************************
- Sets an integer value as the value of an expression node. */
- UNIV_INLINE
- void
- eval_node_set_int_val(
- /*==================*/
- que_node_t* node, /* in: expression node */
- lint val); /* in: value to set */
- /*********************************************************************
- Gets an integer value from an expression node. */
- UNIV_INLINE
- lint
- eval_node_get_int_val(
- /*==================*/
- /* out: integer value */
- que_node_t* node); /* in: expression node */
- /*********************************************************************
- Copies a binary string value as the value of a query graph node. Allocates a
- new buffer if necessary. */
- UNIV_INLINE
- void
- eval_node_copy_and_alloc_val(
- /*=========================*/
- que_node_t* node, /* in: query graph node */
- byte* str, /* in: binary string */
- ulint len); /* in: string length or UNIV_SQL_NULL */
- /*********************************************************************
- Copies a query node value to another node. */
- UNIV_INLINE
- void
- eval_node_copy_val(
- /*===============*/
- que_node_t* node1, /* in: node to copy to */
- que_node_t* node2); /* in: node to copy from */
- /*********************************************************************
- Gets a iboolean value from a query node. */
- UNIV_INLINE
- ibool
- eval_node_get_ibool_val(
- /*===================*/
- /* out: iboolean value */
- que_node_t* node); /* in: query graph node */
- /*********************************************************************
- Evaluates a comparison node. */
- ibool
- eval_cmp(
- /*=====*/
- /* out: the result of the comparison */
- func_node_t* cmp_node); /* in: comparison node */
- #ifndef UNIV_NONINL
- #include "eval0eval.ic"
- #endif
- #endif