page0types.h File Reference

#include <map>
#include "univ.i"
#include "dict0types.h"
#include "mtr0types.h"

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Data Structures
struct	page_zip_des_t
struct	page_zip_stat_t

Macros
#define	page_t   ib_page_t
#define	PAGE_ZIP_SSIZE_BITS   3
#define	PAGE_ZIP_SSIZE_MAX   (UNIV_ZIP_SIZE_SHIFT_MAX - UNIV_ZIP_SIZE_SHIFT_MIN + 1)

Typedefs
typedef byte	page_t
typedef byte	page_zip_t
typedef map< index_id_t, page_zip_stat_t >	page_zip_stat_per_index_t

Functions
UNIV_INTERN void	page_zip_rec_set_deleted (page_zip_des_t *page_zip, const byte *rec, ulint flag))
UNIV_INTERN void	page_zip_rec_set_owned (page_zip_des_t *page_zip, const byte *rec, ulint flag))
UNIV_INTERN void	page_zip_dir_delete (page_zip_des_t *page_zip, byte *rec, dict_index_t *index, const ulint *offsets, const byte *free)))
UNIV_INTERN void	page_zip_dir_add_slot (page_zip_des_t *page_zip, ulint is_clustered))

Variables
page_zip_stat_t	page_zip_stat [PAGE_ZIP_SSIZE_MAX]
page_zip_stat_per_index_t	page_zip_stat_per_index
ib_mutex_t	page_zip_stat_per_index_mutex

Detailed Description

Index page routines

Created 2/2/1994 Heikki Tuuri

Macro Definition Documentation

#define page_t   ib_page_t

Eliminates a name collision on HP-UX

#define PAGE_ZIP_SSIZE_BITS   3

Number of bits needed for representing different compressed page sizes

#define PAGE_ZIP_SSIZE_MAX   (UNIV_ZIP_SIZE_SHIFT_MAX - UNIV_ZIP_SIZE_SHIFT_MIN + 1)

Maximum compressed page shift size

Typedef Documentation

typedef byte page_t

Type of the index page

typedef map<index_id_t, page_zip_stat_t> page_zip_stat_per_index_t

Compression statistics types

typedef byte page_zip_t

Compressed index page

Function Documentation

UNIV_INTERN void page_zip_dir_add_slot	(	page_zip_des_t *	page_zip,
		ulint	is_clustered
	)

Add a slot to the dense page directory.

Parameters

page_zip	in/out: compressed page
is_clustered	in: nonzero for clustered index, zero for others

UNIV_INTERN void page_zip_dir_delete	(	page_zip_des_t *	page_zip,
		byte *	rec,
		dict_index_t *	index,
		const ulint *	offsets,
		const byte *	free
	)

Shift the dense page directory when a record is deleted.

Parameters

page_zip	in/out: compressed page
rec	in: deleted record
index	in: index of rec
offsets	in: rec_get_offsets(rec)
free	in: previous start of the free list

UNIV_INTERN void page_zip_rec_set_deleted	(	page_zip_des_t *	page_zip,
		const byte *	rec,
		ulint	flag
	)

Write the "deleted" flag of a record on a compressed page. The flag must already have been written on the uncompressed page.

Parameters

page_zip	in/out: compressed page
rec	in: record on the uncompressed page
flag	in: the deleted flag (nonzero=TRUE)

UNIV_INTERN void page_zip_rec_set_owned	(	page_zip_des_t *	page_zip,
		const byte *	rec,
		ulint	flag
	)

Write the "owned" flag of a record on a compressed page. The n_owned field must already have been written on the uncompressed page.

Parameters

page_zip	in/out: compressed page
rec	in: record on the uncompressed page
flag	in: the owned flag (nonzero=TRUE)

Variable Documentation

page_zip_stat_t page_zip_stat[PAGE_ZIP_SSIZE_MAX]

Statistics on compression, indexed by page_zip_des_t::ssize - 1

page_zip_stat_per_index_t page_zip_stat_per_index

Statistics on compression, indexed by dict_index_t::id