MySQL 8.4.3
Source Code Documentation
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#include <assert.h>
#include <stddef.h>
#include <sys/types.h>
#include "lex_string.h"
#include "prealloced_array.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... | |
enum cost_constant_error |
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strong |
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.