mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 05:22:25 +01:00
fc65b08f53
Fix some bugs. The tests innodb and innodb-index fail, but that might be due to an old MySQL source tree being used.
247 lines
8.6 KiB
C
247 lines
8.6 KiB
C
/******************************************************
|
|
General row routines
|
|
|
|
(c) 1996 Innobase Oy
|
|
|
|
Created 4/20/1996 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#ifndef row0row_h
|
|
#define row0row_h
|
|
|
|
#include "univ.i"
|
|
#include "data0data.h"
|
|
#include "dict0types.h"
|
|
#include "trx0types.h"
|
|
#include "que0types.h"
|
|
#include "mtr0mtr.h"
|
|
#include "rem0types.h"
|
|
#include "read0types.h"
|
|
#include "row0types.h"
|
|
#include "btr0types.h"
|
|
|
|
/*************************************************************************
|
|
Gets the offset of the trx id field, in bytes relative to the origin of
|
|
a clustered index record. */
|
|
|
|
ulint
|
|
row_get_trx_id_offset(
|
|
/*==================*/
|
|
/* out: offset of DATA_TRX_ID */
|
|
const rec_t* rec, /* in: record */
|
|
dict_index_t* index, /* in: clustered index */
|
|
const ulint* offsets);/* in: rec_get_offsets(rec, index) */
|
|
/*************************************************************************
|
|
Reads the trx id field from a clustered index record. */
|
|
UNIV_INLINE
|
|
dulint
|
|
row_get_rec_trx_id(
|
|
/*===============*/
|
|
/* out: value of the field */
|
|
const rec_t* rec, /* in: record */
|
|
dict_index_t* index, /* in: clustered index */
|
|
const ulint* offsets);/* in: rec_get_offsets(rec, index) */
|
|
/*************************************************************************
|
|
Reads the roll pointer field from a clustered index record. */
|
|
UNIV_INLINE
|
|
dulint
|
|
row_get_rec_roll_ptr(
|
|
/*=================*/
|
|
/* out: value of the field */
|
|
const rec_t* rec, /* in: record */
|
|
dict_index_t* index, /* in: clustered index */
|
|
const ulint* offsets);/* in: rec_get_offsets(rec, index) */
|
|
/*********************************************************************
|
|
When an insert or purge to a table is performed, this function builds
|
|
the entry to be inserted into or purged from an index on the table. */
|
|
|
|
dtuple_t*
|
|
row_build_index_entry(
|
|
/*==================*/
|
|
/* out: index entry which should be
|
|
inserted or purged */
|
|
const dtuple_t* row, /* in: row which should be
|
|
inserted or purged */
|
|
row_ext_t* ext, /* in: externally stored column prefixes,
|
|
or NULL */
|
|
dict_index_t* index, /* in: index on the table */
|
|
mem_heap_t* heap); /* in: memory heap from which the memory for
|
|
the index entry is allocated */
|
|
/***********************************************************************
|
|
An inverse function to dict_row_build_index_entry. Builds a row from a
|
|
record in a clustered index. */
|
|
|
|
dtuple_t*
|
|
row_build(
|
|
/*======*/
|
|
/* out, own: row built; see the NOTE below! */
|
|
ulint type, /* in: ROW_COPY_POINTERS or ROW_COPY_DATA;
|
|
the latter copies also the data fields to
|
|
heap while the first only places pointers to
|
|
data fields on the index page, and thus is
|
|
more efficient */
|
|
dict_index_t* index, /* in: clustered index */
|
|
const rec_t* rec, /* in: record in the clustered index;
|
|
NOTE: in the case ROW_COPY_POINTERS
|
|
the data fields in the row will point
|
|
directly into this record, therefore,
|
|
the buffer page of this record must be
|
|
at least s-latched and the latch held
|
|
as long as the row dtuple is used! */
|
|
const ulint* offsets,/* in: rec_get_offsets(rec, index)
|
|
or NULL, in which case this function
|
|
will invoke rec_get_offsets() */
|
|
row_ext_t** ext, /* out, own: cache of externally stored
|
|
column prefixes, or NULL */
|
|
mem_heap_t* heap); /* in: memory heap from which the memory
|
|
needed is allocated */
|
|
/***********************************************************************
|
|
Converts an index record to a typed data tuple. */
|
|
|
|
dtuple_t*
|
|
row_rec_to_index_entry(
|
|
/*===================*/
|
|
/* out, own: index entry built; see the
|
|
NOTE below! */
|
|
ulint type, /* in: ROW_COPY_DATA, or ROW_COPY_POINTERS:
|
|
the former copies also the data fields to
|
|
heap as the latter only places pointers to
|
|
data fields on the index page */
|
|
dict_index_t* index, /* in: index */
|
|
const rec_t* rec, /* in: record in the index;
|
|
NOTE: in the case ROW_COPY_POINTERS
|
|
the data fields in the row will point
|
|
directly into this record, therefore,
|
|
the buffer page of this record must be
|
|
at least s-latched and the latch held
|
|
as long as the dtuple is used! */
|
|
mem_heap_t* heap); /* in: memory heap from which the memory
|
|
needed is allocated */
|
|
/***********************************************************************
|
|
Builds from a secondary index record a row reference with which we can
|
|
search the clustered index record. */
|
|
|
|
dtuple_t*
|
|
row_build_row_ref(
|
|
/*==============*/
|
|
/* out, own: row reference built; see the
|
|
NOTE below! */
|
|
ulint type, /* in: ROW_COPY_DATA, or ROW_COPY_POINTERS:
|
|
the former copies also the data fields to
|
|
heap, whereas the latter only places pointers
|
|
to data fields on the index page */
|
|
dict_index_t* index, /* in: index */
|
|
const rec_t* rec, /* in: record in the index;
|
|
NOTE: in the case ROW_COPY_POINTERS
|
|
the data fields in the row will point
|
|
directly into this record, therefore,
|
|
the buffer page of this record must be
|
|
at least s-latched and the latch held
|
|
as long as the row reference is used! */
|
|
mem_heap_t* heap); /* in: memory heap from which the memory
|
|
needed is allocated */
|
|
/***********************************************************************
|
|
Builds from a secondary index record a row reference with which we can
|
|
search the clustered index record. */
|
|
|
|
void
|
|
row_build_row_ref_in_tuple(
|
|
/*=======================*/
|
|
dtuple_t* ref, /* in/out: row reference built; see the
|
|
NOTE below! */
|
|
dict_index_t* index, /* in: index */
|
|
const rec_t* rec, /* in: record in the index;
|
|
NOTE: the data fields in ref will point
|
|
directly into this record, therefore,
|
|
the buffer page of this record must be
|
|
at least s-latched and the latch held
|
|
as long as the row reference is used! */
|
|
trx_t* trx); /* in: transaction */
|
|
/***********************************************************************
|
|
From a row build a row reference with which we can search the clustered
|
|
index record. */
|
|
|
|
void
|
|
row_build_row_ref_from_row(
|
|
/*=======================*/
|
|
dtuple_t* ref, /* in/out: row reference built; see the
|
|
NOTE below! ref must have the right number
|
|
of fields! */
|
|
dict_table_t* table, /* in: table */
|
|
dtuple_t* row); /* in: row
|
|
NOTE: the data fields in ref will point
|
|
directly into data of this row */
|
|
/***********************************************************************
|
|
Builds from a secondary index record a row reference with which we can
|
|
search the clustered index record. */
|
|
UNIV_INLINE
|
|
void
|
|
row_build_row_ref_fast(
|
|
/*===================*/
|
|
dtuple_t* ref, /* in: typed data tuple where the
|
|
reference is built */
|
|
const ulint* map, /* in: array of field numbers in rec
|
|
telling how ref should be built from
|
|
the fields of rec */
|
|
const rec_t* rec, /* in: record in the index; must be
|
|
preserved while ref is used, as we do
|
|
not copy field values to heap */
|
|
const ulint* offsets);/* in: array returned by rec_get_offsets() */
|
|
/*******************************************************************
|
|
Searches the clustered index record for a row, if we have the row
|
|
reference. */
|
|
|
|
ibool
|
|
row_search_on_row_ref(
|
|
/*==================*/
|
|
/* out: TRUE if found */
|
|
btr_pcur_t* pcur, /* in/out: persistent cursor, which must
|
|
be closed by the caller */
|
|
ulint mode, /* in: BTR_MODIFY_LEAF, ... */
|
|
dict_table_t* table, /* in: table */
|
|
dtuple_t* ref, /* in: row reference */
|
|
mtr_t* mtr); /* in: mtr */
|
|
/*************************************************************************
|
|
Fetches the clustered index record for a secondary index record. The latches
|
|
on the secondary index record are preserved. */
|
|
|
|
rec_t*
|
|
row_get_clust_rec(
|
|
/*==============*/
|
|
/* out: record or NULL, if no record found */
|
|
ulint mode, /* in: BTR_MODIFY_LEAF, ... */
|
|
const rec_t* rec, /* in: record in a secondary index */
|
|
dict_index_t* index, /* in: secondary index */
|
|
dict_index_t** clust_index,/* out: clustered index */
|
|
mtr_t* mtr); /* in: mtr */
|
|
/*******************************************************************
|
|
Searches an index record. */
|
|
|
|
ibool
|
|
row_search_index_entry(
|
|
/*===================*/
|
|
/* out: TRUE if found */
|
|
dict_index_t* index, /* in: index */
|
|
const dtuple_t* entry, /* in: index entry */
|
|
ulint mode, /* in: BTR_MODIFY_LEAF, ... */
|
|
btr_pcur_t* pcur, /* in/out: persistent cursor, which must
|
|
be closed by the caller */
|
|
mtr_t* mtr); /* in: mtr */
|
|
|
|
|
|
#define ROW_COPY_DATA 1
|
|
#define ROW_COPY_POINTERS 2
|
|
|
|
/* The allowed latching order of index records is the following:
|
|
(1) a secondary index record ->
|
|
(2) the clustered index record ->
|
|
(3) rollback segment data for the clustered index record.
|
|
|
|
No new latches may be obtained while the kernel mutex is reserved.
|
|
However, the kernel mutex can be reserved while latches are owned. */
|
|
|
|
#ifndef UNIV_NONINL
|
|
#include "row0row.ic"
|
|
#endif
|
|
|
|
#endif
|