eval0eval.cc File Reference

#include "eval0eval.h"
#include "data0data.h"
#include "row0sel.h"
#include "rem0cmp.h"

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Functions
UNIV_INLINE que_node_t *	que_node_get_like_node (que_node_t *node)
UNIV_INTERN byte *	eval_node_alloc_val_buf (que_node_t *node, ulint size)
UNIV_INTERN void	eval_node_free_val_buf (que_node_t *node)
UNIV_INLINE ibool	eval_cmp_like (que_node_t *arg1, que_node_t *arg2)
ibool	eval_cmp (func_node_t *cmp_node)
UNIV_INLINE void	eval_logical (func_node_t *logical_node)
UNIV_INLINE void	eval_arith (func_node_t *arith_node)
UNIV_INLINE void	eval_aggregate (func_node_t *node)
UNIV_INLINE void	eval_notfound (func_node_t *func_node)
UNIV_INLINE void	eval_substr (func_node_t *func_node)
UNIV_INLINE void	eval_binary_to_number (func_node_t *func_node)
UNIV_INLINE void	eval_to_binary (func_node_t *func_node)
UNIV_INLINE void	eval_predefined (func_node_t *func_node)
UNIV_INTERN void	eval_func (func_node_t *func_node)

Detailed Description

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

Created 12/29/1997 Heikki Tuuri

Definition in file eval0eval.cc.

Function Documentation

UNIV_INLINE void eval_aggregate

(

func_node_t *

node

)

Evaluates an aggregate operation node.

Parameters

node	in: aggregate operation node

Definition at line 352 of file eval0eval.cc.

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UNIV_INLINE void eval_arith

(

func_node_t *

arith_node

)

Evaluates an arithmetic operation node.

Parameters

arith_node

in: arithmetic operation node

Definition at line 308 of file eval0eval.cc.

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UNIV_INLINE void eval_binary_to_number

(

func_node_t *

func_node

)

Evaluates a predefined function node.

Parameters

func_node

in: function node

Definition at line 655 of file eval0eval.cc.

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ibool 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

Definition at line 202 of file eval0eval.cc.

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UNIV_INTERN void eval_func

(

func_node_t *

func_node

)

Evaluates a function node.

Parameters

func_node

in: function node

Definition at line 875 of file eval0eval.cc.

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UNIV_INLINE void eval_logical

(

func_node_t *

logical_node

)

Evaluates a logical operation node.

Parameters

logical_node

in: logical operation node

Definition at line 267 of file eval0eval.cc.

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UNIV_INTERN byte* eval_node_alloc_val_buf	(	que_node_t *	node,
		ulint	size
	)

Allocate a buffer from global dynamic memory for a value of a que_node. NOTE that this memory must be explicitly freed when the query graph is freed. If the node already has an allocated buffer, that buffer is freed here. NOTE that this is the only function where dynamic memory should be allocated for a query node val field.

Returns

pointer to allocated buffer

Parameters

node	in: query graph node; sets the val field data field to point to the new buffer, and len field equal to size
size	in: buffer size

Definition at line 66 of file eval0eval.cc.

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UNIV_INTERN 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.

Parameters

node	in: query graph node

Definition at line 106 of file eval0eval.cc.

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UNIV_INLINE void eval_notfound

(

func_node_t *

func_node

)

Evaluates a notfound-function node.

Parameters

func_node

in: function node

Definition at line 473 of file eval0eval.cc.

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UNIV_INLINE void eval_predefined

(

func_node_t *

func_node

)

Evaluates a predefined function node.

Parameters

func_node

in: function node

Definition at line 783 of file eval0eval.cc.

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UNIV_INLINE void eval_substr

(

func_node_t *

func_node

)

Evaluates a substr-function node.

Parameters

func_node

in: function node

Definition at line 510 of file eval0eval.cc.

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UNIV_INLINE void eval_to_binary

(

func_node_t *

func_node

)

Evaluates a predefined function node. If the first argument is an integer, this function looks at the second argument which is the integer length in bytes, and converts the integer to a VARCHAR. If the first argument is of some other type, this function converts it to BINARY.

Parameters

func_node

in: function node

Definition at line 739 of file eval0eval.cc.

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