mirror of
https://github.com/MariaDB/server.git
synced 2025-01-21 22:34:18 +01:00
8fb8584e75
Only add indexed BLOBs to row_ext. trx_undo_rec_get_partial_row(): Move the BLOB fetching to row_ext_create(). row_build(): Pass only those BLOBs to row_ext_create() that are referenced by ordering columns of some indexes, similar to trx_undo_rec_get_partial_row(). row_ext_create(): Add the parameter "tuple". Move the implementation from row0ext.ic to row0ext.c. row_ext_lookup_ith(), row_ext_lookup(): Return a const pointer. Remove the parameters "field" and "f_len". Make the row_ext_t* parameter const. row_ext_t: Remove the field zip_size. field_ref_zero[]: Declare in btr0types.h instead of btr0cur.h. row_ext_lookup_low(): Rename to row_ext_cache_fill() and change the signature.
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/******************************************************
|
|
Caching of externally stored column prefixes
|
|
|
|
(c) 2006 Innobase Oy
|
|
|
|
Created September 2006 Marko Makela
|
|
*******************************************************/
|
|
|
|
#ifndef row0ext_h
|
|
#define row0ext_h
|
|
|
|
#include "univ.i"
|
|
#include "row0types.h"
|
|
#include "data0types.h"
|
|
#include "mem0mem.h"
|
|
|
|
/************************************************************************
|
|
Creates a cache of column prefixes of externally stored columns. */
|
|
|
|
row_ext_t*
|
|
row_ext_create(
|
|
/*===========*/
|
|
/* out,own: column prefix cache */
|
|
ulint n_ext, /* in: number of externally stored columns */
|
|
const ulint* ext, /* in: col_no's of externally stored columns
|
|
in the InnoDB table object, as reported by
|
|
dict_col_get_no(); NOT relative to the records
|
|
in the clustered index */
|
|
const dtuple_t* tuple, /* in: data tuple containing the field
|
|
references of the externally stored columns;
|
|
must be indexed by col_no */
|
|
ulint zip_size,/* compressed page size in bytes, or 0 */
|
|
mem_heap_t* heap); /* in: heap where created */
|
|
|
|
/************************************************************************
|
|
Looks up a column prefix of an externally stored column. */
|
|
UNIV_INLINE
|
|
const byte*
|
|
row_ext_lookup_ith(
|
|
/*===============*/
|
|
/* out: column prefix, or NULL if
|
|
the column is not stored externally,
|
|
or pointer to field_ref_zero
|
|
if the BLOB pointer is unset */
|
|
const row_ext_t* ext, /* in/out: column prefix cache */
|
|
ulint i, /* in: index of ext->ext[] */
|
|
ulint* len); /* out: length of prefix, in bytes,
|
|
at most REC_MAX_INDEX_COL_LEN */
|
|
/************************************************************************
|
|
Looks up a column prefix of an externally stored column. */
|
|
UNIV_INLINE
|
|
const byte*
|
|
row_ext_lookup(
|
|
/*===========*/
|
|
/* out: column prefix, or NULL if
|
|
the column is not stored externally,
|
|
or pointer to field_ref_zero
|
|
if the BLOB pointer is unset */
|
|
const row_ext_t* ext, /* in: column prefix cache */
|
|
ulint col, /* in: column number in the InnoDB
|
|
table object, as reported by
|
|
dict_col_get_no(); NOT relative to the
|
|
records in the clustered index */
|
|
ulint* len); /* out: length of prefix, in bytes,
|
|
at most REC_MAX_INDEX_COL_LEN */
|
|
|
|
/* Prefixes of externally stored columns */
|
|
struct row_ext_struct{
|
|
ulint n_ext; /* number of externally stored columns */
|
|
const ulint* ext; /* col_no's of externally stored columns */
|
|
byte* buf; /* backing store of the column prefix cache */
|
|
ulint len[1]; /* prefix lengths; 0 if not cached */
|
|
};
|
|
|
|
#ifndef UNIV_NONINL
|
|
#include "row0ext.ic"
|
|
#endif
|
|
|
|
#endif
|