opt_costconstants.h File Reference

#include <assert.h>
#include <stddef.h>
#include <sys/types.h>
#include "lex_string.h"
#include "prealloced_array.h"
#include "sql/join_optimizer/cost_constants.h"

Go to the source code of this file.

Classes
class	Server_cost_constants
	Cost constants for operations done by the server. More...
class	SE_cost_constants
	Cost constants for a storage engine. More...
class	Cost_model_se_info
	Class that keeps all cost constants for a storage engine. More...
class	Cost_model_constants
	Set of all cost constants used by the server and all storage engines. More...

Enumerations
enum class	Optimizer { kOriginal , kHypergraph }
enum	cost_constant_error {   COST_CONSTANT_OK , UNKNOWN_COST_NAME , UNKNOWN_ENGINE_NAME , INVALID_COST_VALUE ,   INVALID_DEVICE_TYPE }
	Error codes returned from the functions that do updates of the cost constants. More...

Variables
const unsigned int	MAX_STORAGE_CLASSES = 1
	The cost model should support different types of storage devices each with different cost constants. More...

Enumeration Type Documentation

cost_constant_error

enum cost_constant_error

Error codes returned from the functions that do updates of the cost constants.

Enumerator
COST_CONSTANT_OK
UNKNOWN_COST_NAME
UNKNOWN_ENGINE_NAME
INVALID_COST_VALUE
INVALID_DEVICE_TYPE

Optimizer

enum class Optimizer

strong

Enumerator
kOriginal
kHypergraph

Variable Documentation

MAX_STORAGE_CLASSES

const unsigned int MAX_STORAGE_CLASSES = 1

The cost model should support different types of storage devices each with different cost constants.

Due to that we in the current version does not have a way to know which storage device a given table is stored on, the initial version of the cost model will only have one set of cost constants per storage engine.