page0types.h File Reference

#include "univ.i"
#include "dict0types.h"
#include "mtr0types.h"

Go to the source code of this file.

Classes
struct	page_zip_des_struct
struct	page_zip_stat_struct

Macros
#define	page0types_h
#define	page_t   ib_page_t
#define	PAGE_ZIP_SSIZE_BITS   3
#define	PAGE_ZIP_MIN_SIZE_SHIFT   10
#define	PAGE_ZIP_MIN_SIZE   (1 << PAGE_ZIP_MIN_SIZE_SHIFT)
#define	PAGE_ZIP_NUM_SSIZE   (UNIV_PAGE_SIZE_SHIFT - PAGE_ZIP_MIN_SIZE_SHIFT + 2)
#define	PAGE_ZIP_NUM_SSIZE_MAX   (UNIV_PAGE_SIZE_SHIFT_MAX - PAGE_ZIP_MIN_SIZE_SHIFT + 2)

Typedefs
typedef byte	page_t
typedef struct page_cur_struct	page_cur_t
typedef byte	page_zip_t
typedef struct page_zip_des_struct	page_zip_des_t
typedef struct page_zip_stat_struct	page_zip_stat_t

Functions
UNIV_INTERN void	page_zip_rec_set_deleted (page_zip_des_t *page_zip, const byte *rec, ulint flag) __attribute__((nonnull))
UNIV_INTERN void	page_zip_rec_set_owned (page_zip_des_t *page_zip, const byte *rec, ulint flag) __attribute__((nonnull))
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) __attribute__((nonnull(1
UNIV_INTERN void UNIV_INTERN void	page_zip_dir_add_slot (page_zip_des_t *page_zip, ulint is_clustered) __attribute__((nonnull))

Variables
page_zip_stat_t	page_zip_stat [PAGE_ZIP_NUM_SSIZE_MAX-1]

---

Detailed Description

Index page routines

Created 2/2/1994 Heikki Tuuri

Definition in file page0types.h.

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Macro Definition Documentation

#define page_t   ib_page_t

Eliminates a name collision on HP-UX

Definition at line 35 of file page0types.h.

#define PAGE_ZIP_MIN_SIZE   (1 << PAGE_ZIP_MIN_SIZE_SHIFT)

Smallest compressed page size

Definition at line 56 of file page0types.h.

Referenced by fil_create_new_single_table_tablespace().

#define PAGE_ZIP_MIN_SIZE_SHIFT   10

log2 of smallest compressed page size

Definition at line 54 of file page0types.h.

#define PAGE_ZIP_NUM_SSIZE   (UNIV_PAGE_SIZE_SHIFT - PAGE_ZIP_MIN_SIZE_SHIFT + 2)

Number of supported compressed page sizes

Definition at line 59 of file page0types.h.

#define PAGE_ZIP_SSIZE_BITS   3

Number of bits needed for representing different compressed page sizes

Definition at line 51 of file page0types.h.

---

Typedef Documentation

typedef struct page_cur_struct page_cur_t

Index page cursor

Definition at line 39 of file page0types.h.

typedef byte page_t

Type of the index page

Definition at line 37 of file page0types.h.

typedef struct page_zip_des_struct page_zip_des_t

Compressed page descriptor

Definition at line 44 of file page0types.h.

typedef struct page_zip_stat_struct page_zip_stat_t

Compression statistics

Definition at line 100 of file page0types.h.

typedef byte page_zip_t

Compressed index page

Definition at line 42 of file page0types.h.

---

Function Documentation

UNIV_INTERN void 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

Definition at line 4250 of file page0zip.cc.

References BTR_EXTERN_FIELD_REF_SIZE, page_zip_des_struct::data, page_zip_des_struct::n_blobs, page_dir_get_n_heap(), page_is_comp(), page_is_leaf(), page_zip_dir_add_slot(), page_zip_get_size(), and ut_ad.

Referenced by page_cur_insert_rec_zip(), and page_zip_dir_add_slot().

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)

Definition at line 4030 of file page0zip.cc.

References page_zip_des_struct::data, page_align(), page_offset(), page_zip_get_size(), page_zip_rec_set_deleted(), and ut_a.

Referenced by page_zip_rec_set_deleted().

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)

Definition at line 4054 of file page0zip.cc.

References page_zip_des_struct::data, page_offset(), page_zip_get_size(), page_zip_rec_set_owned(), and ut_a.

Referenced by page_zip_rec_set_owned().

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Variable Documentation

page_zip_stat_t page_zip_stat[PAGE_ZIP_NUM_SSIZE_MAX-1]

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

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

Definition at line 52 of file page0zip.cc.