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/******************************************************
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
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