btr0types.h File Reference

The index tree general types. More...

#include "univ.i"
#include "page0size.h"
#include "page0types.h"
#include "rem0types.h"
#include "sync0rw.h"
#include "ut0rnd.h"

Go to the source code of this file.

Variables
bool	btr_search_enabled
	Is search system enabled. More...
ulong	btr_ahi_parts
	Number of adaptive hash index partition. More...
ut::fast_modulo_t	btr_ahi_parts_fast_modulo
	Structure to facilitate fast modulo for number of adaptive hash index partition. More...
constexpr uint32_t	BTR_EXTERN_FIELD_REF_SIZE = FIELD_REF_SIZE
	The size of a reference to data stored on a different page. More...
constexpr uint32_t	BTR_EXTERN_LOCAL_STORED_MAX_SIZE
	If the data don't exceed the size, the data are stored locally. More...

Detailed Description

The index tree general types.

Created 2/17/1996 Heikki Tuuri

Variable Documentation

btr_ahi_parts

ulong btr_ahi_parts

extern

Number of adaptive hash index partition.

btr_ahi_parts_fast_modulo

ut::fast_modulo_t btr_ahi_parts_fast_modulo

extern

Structure to facilitate fast modulo for number of adaptive hash index partition.

BTR_EXTERN_FIELD_REF_SIZE

constexpr uint32_t BTR_EXTERN_FIELD_REF_SIZE = FIELD_REF_SIZE

constexpr

The size of a reference to data stored on a different page.

The reference is stored at the end of the prefix of the field in the index record.

BTR_EXTERN_LOCAL_STORED_MAX_SIZE

constexpr uint32_t BTR_EXTERN_LOCAL_STORED_MAX_SIZE

constexpr

Initial value:

=
    BTR_EXTERN_FIELD_REF_SIZE * 2

If the data don't exceed the size, the data are stored locally.

btr_search_enabled

bool btr_search_enabled

extern

Is search system enabled.

Search system is protected by array of latches.