mirror of
https://github.com/MariaDB/server.git
synced 2025-02-01 19:41:47 +01:00
ee152b828f
of clustered indexes. Previously, parts of the code assumed that these columns would exist on all leaf pages. Simplify the update-in-place of these columns. Add inline function dict_index_is_clust() to replace all tests index->type & DICT_CLUSTERED. Remove the redo log entry types MLOG_ZIP_WRITE_TRX_ID and MLOG_ZIP_WRITE_ROLL_PTR, because the modifications to these columns are covered by logical logging. Fuse page_zip_write_trx_id() and page_zip_write_roll_ptr() into page_zip_write_trx_id_and_roll_ptr(). page_zip_dir_add_slot(), page_zip_available(): Add flag "is_clustered", so that no space will be reserved for TRX_ID and ROLL_PTR on leaf pages of secondary indexes. page_zip_apply_log(): Flag an error when val==0 is encoded with two bytes. page_zip_write_rec(): Add debug assertions that there is enough space available for the entry before copying the data bytes of the record.
127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/******************************************************
|
|
Index page routines
|
|
|
|
(c) 1994-1996 Innobase Oy
|
|
|
|
Created 2/2/1994 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#ifndef page0types_h
|
|
#define page0types_h
|
|
|
|
#include "univ.i"
|
|
#include "dict0types.h"
|
|
#include "mtr0types.h"
|
|
|
|
/* Type of the index page */
|
|
/* The following define eliminates a name collision on HP-UX */
|
|
#define page_t ib_page_t
|
|
typedef byte page_t;
|
|
typedef struct page_search_struct page_search_t;
|
|
typedef struct page_cur_struct page_cur_t;
|
|
|
|
typedef byte page_zip_t;
|
|
typedef struct page_zip_des_struct page_zip_des_t;
|
|
|
|
/* The following definitions would better belong to page0zip.h,
|
|
but we cannot include page0zip.h from rem0rec.ic, because
|
|
page0*.h includes rem0rec.h and may include rem0rec.ic. */
|
|
|
|
/* Compressed page descriptor */
|
|
struct page_zip_des_struct
|
|
{
|
|
page_zip_t* data; /* compressed page data */
|
|
ulint size; /* total size of compressed page */
|
|
ulint n_blobs; /* number of externally stored
|
|
columns */
|
|
ulint m_start; /* start offset of modification log */
|
|
ulint m_end; /* end offset of modification log */
|
|
};
|
|
|
|
/**************************************************************************
|
|
Write data to the compressed page. The data must already be written to
|
|
the uncompressed page. */
|
|
|
|
void
|
|
page_zip_write(
|
|
/*===========*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
const byte* rec, /* in: record whose data is being written */
|
|
const ulint* offsets,/* in: rec_get_offsets(rec, index) */
|
|
lint offset, /* in: start address of the block,
|
|
relative to rec */
|
|
ulint length) /* in: length of the data */
|
|
__attribute__((nonnull));
|
|
|
|
/**************************************************************************
|
|
Clear a record on the uncompressed and compressed page, if possible. */
|
|
|
|
void
|
|
page_zip_clear_rec(
|
|
/*===============*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
byte* rec, /* in: record to clear */
|
|
dict_index_t* index, /* in: index of rec */
|
|
const ulint* offsets,/* in: rec_get_offsets(rec, index) */
|
|
mtr_t* mtr) /* in: mini-transaction */
|
|
__attribute__((nonnull));
|
|
|
|
/**************************************************************************
|
|
Write data to the uncompressed header portion of a page. The data must
|
|
already have been written to the uncompressed page. */
|
|
UNIV_INLINE
|
|
void
|
|
page_zip_write_header(
|
|
/*==================*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
const byte* str, /* in: address on the uncompressed page */
|
|
ulint length, /* in: length of the data */
|
|
mtr_t* mtr) /* in: mini-transaction, or NULL */
|
|
__attribute__((nonnull(1,2)));
|
|
|
|
/**************************************************************************
|
|
Write the "deleted" flag of a record on a compressed page. The flag must
|
|
already have been written on the uncompressed page. */
|
|
|
|
void
|
|
page_zip_rec_set_deleted(
|
|
/*=====================*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
const byte* rec, /* in: record on the uncompressed page */
|
|
ulint flag) /* in: the deleted flag (nonzero=TRUE) */
|
|
__attribute__((nonnull));
|
|
|
|
/**************************************************************************
|
|
Write the "owned" flag of a record on a compressed page. The n_owned field
|
|
must already have been written on the uncompressed page. */
|
|
|
|
void
|
|
page_zip_rec_set_owned(
|
|
/*===================*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
const byte* rec, /* in: record on the uncompressed page */
|
|
ulint flag) /* in: the owned flag (nonzero=TRUE) */
|
|
__attribute__((nonnull));
|
|
|
|
/**************************************************************************
|
|
Shift the dense page directory when a record is deleted. */
|
|
|
|
void
|
|
page_zip_dir_delete(
|
|
/*================*/
|
|
page_zip_des_t* page_zip,/* in/out: compressed page */
|
|
const byte* rec, /* in: deleted record */
|
|
const byte* free) /* in: previous start of the free list */
|
|
__attribute__((nonnull(1,2)));
|
|
|
|
/**************************************************************************
|
|
Add a slot to the dense page directory. */
|
|
|
|
void
|
|
page_zip_dir_add_slot(
|
|
/*==================*/
|
|
page_zip_des_t* page_zip, /* in/out: compressed page */
|
|
ulint is_clustered) /* in: nonzero for clustered index,
|
|
zero for others */
|
|
__attribute__((nonnull));
|
|
#endif
|