eval0eval.h File Reference

SQL evaluator: evaluates simple data structures, like expressions, in a query graph. More...

#include "pars0pars.h"
#include "pars0sym.h"
#include "que0types.h"
#include "univ.i"
#include "eval0eval.ic"

Go to the source code of this file.

Functions
void	eval_node_free_val_buf (que_node_t *node)
	Free the buffer from global dynamic memory for a value of a que_node, if it has been allocated in the above function. More...
static void	eval_sym (sym_node_t *sym_node)
	Evaluates a symbol table symbol. More...
static void	eval_exp (que_node_t *exp_node)
	Evaluates an expression. More...
static void	eval_node_set_int_val (que_node_t *node, lint val)
	Sets an integer value as the value of an expression node. More...
static lint	eval_node_get_int_val (que_node_t *node)
	Gets an integer value from an expression node. More...
static void	eval_node_copy_and_alloc_val (que_node_t *node, const byte *str, ulint len)
	Copies a binary string value as the value of a query graph node. More...
static void	eval_node_copy_val (que_node_t *node1, que_node_t *node2)
	Copies a query node value to another node. More...
static bool	eval_node_get_bool_val (que_node_t *node)
	Gets a boolean value from a query node. More...
bool	eval_cmp (func_node_t *cmp_node)
	Evaluates a comparison node. More...

Detailed Description

SQL evaluator: evaluates simple data structures, like expressions, in a query graph.

Created 12/29/1997 Heikki Tuuri

Function Documentation

eval_cmp()

bool eval_cmp

(

func_node_t *

cmp_node

)

Evaluates a comparison node.

Returns

the result of the comparison in: comparison node

Parameters

cmp_node

in: comparison node

eval_exp()

static void eval_exp ( que_node_t *  exp_node )

inlinestatic

Evaluates an expression.

in: expression

eval_node_copy_and_alloc_val()

static void eval_node_copy_and_alloc_val ( que_node_t *  node, const byte *  str, ulint  len  )

inlinestatic

Copies a binary string value as the value of a query graph node.

Allocates a new buffer if necessary.

Parameters

[in]	node	query graph node
[in]	str	binary string
[in]	len	string length or UNIV_SQL_NULL

eval_node_copy_val()

static void eval_node_copy_val ( que_node_t *  node1, que_node_t *  node2  )

inlinestatic

Copies a query node value to another node.

Parameters

[in]	node1	node to copy to
[in]	node2	node to copy from

eval_node_free_val_buf()

void eval_node_free_val_buf

(

que_node_t *

node

)

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. in: query graph node

The freeing for pushed column values is done in sel_col_prefetch_buf_free.

Parameters

node	in: query graph node

eval_node_get_bool_val()

static bool eval_node_get_bool_val ( que_node_t *  node )

inlinestatic

Gets a boolean value from a query node.

Returns

boolean value in: query graph node

eval_node_get_int_val()

static lint eval_node_get_int_val ( que_node_t *  node )

inlinestatic

Gets an integer value from an expression node.

Returns

integer value in: expression node

eval_node_set_int_val()

static void eval_node_set_int_val ( que_node_t *  node, lint  val  )

inlinestatic

Sets an integer value as the value of an expression node.

Parameters

[in]	node	expression node
[in]	val	value to set

eval_sym()

static void eval_sym ( sym_node_t *  sym_node )

inlinestatic

Evaluates a symbol table symbol.

in: symbol table node