mirror of
https://github.com/MariaDB/server.git
synced 2025-01-18 13:02:28 +01:00
117 lines
3 KiB
Text
117 lines
3 KiB
Text
/******************************************************
|
|
Update of a row
|
|
|
|
(c) 1996 Innobase Oy
|
|
|
|
Created 12/27/1996 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "mtr0log.h"
|
|
#include "trx0trx.h"
|
|
#include "trx0undo.h"
|
|
#include "row0row.h"
|
|
#include "btr0sea.h"
|
|
|
|
/*************************************************************************
|
|
Creates an update vector object. */
|
|
UNIV_INLINE
|
|
upd_t*
|
|
upd_create(
|
|
/*=======*/
|
|
/* out, own: update vector object */
|
|
ulint n, /* in: number of fields */
|
|
mem_heap_t* heap) /* in: heap from which memory allocated */
|
|
{
|
|
upd_t* update;
|
|
ulint i;
|
|
|
|
update = mem_heap_alloc(heap, sizeof(upd_t));
|
|
|
|
update->info_bits = 0;
|
|
update->n_fields = n;
|
|
update->fields = mem_heap_alloc(heap, sizeof(upd_field_t) * n);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
update->fields[i].extern_storage = 0;
|
|
}
|
|
|
|
return(update);
|
|
}
|
|
|
|
/*************************************************************************
|
|
Returns the number of fields in the update vector == number of columns
|
|
to be updated by an update vector. */
|
|
UNIV_INLINE
|
|
ulint
|
|
upd_get_n_fields(
|
|
/*=============*/
|
|
/* out: number of fields */
|
|
upd_t* update) /* in: update vector */
|
|
{
|
|
ut_ad(update);
|
|
|
|
return(update->n_fields);
|
|
}
|
|
|
|
/*************************************************************************
|
|
Returns the nth field of an update vector. */
|
|
UNIV_INLINE
|
|
upd_field_t*
|
|
upd_get_nth_field(
|
|
/*==============*/
|
|
/* out: update vector field */
|
|
upd_t* update, /* in: update vector */
|
|
ulint n) /* in: field position in update vector */
|
|
{
|
|
ut_ad(update);
|
|
ut_ad(n < update->n_fields);
|
|
|
|
return(update->fields + n);
|
|
}
|
|
|
|
/*************************************************************************
|
|
Sets an index field number to be updated by an update vector field. */
|
|
UNIV_INLINE
|
|
void
|
|
upd_field_set_field_no(
|
|
/*===================*/
|
|
upd_field_t* upd_field, /* in: update vector field */
|
|
ulint field_no, /* in: field number in a clustered
|
|
index */
|
|
dict_index_t* index) /* in: index */
|
|
{
|
|
upd_field->field_no = field_no;
|
|
|
|
if (field_no >= dict_index_get_n_fields(index)) {
|
|
fprintf(stderr,
|
|
"InnoDB: Error: trying to access field %lu in table %s\n"
|
|
"InnoDB: index %s, but index has only %lu fields\n",
|
|
field_no, index->table_name, index->name,
|
|
dict_index_get_n_fields(index));
|
|
}
|
|
|
|
dtype_copy(dfield_get_type(&(upd_field->new_val)),
|
|
dict_index_get_nth_type(index, field_no));
|
|
}
|
|
|
|
/*************************************************************************
|
|
Updates the trx id and roll ptr field in a clustered index record when
|
|
a row is updated or marked deleted. */
|
|
UNIV_INLINE
|
|
void
|
|
row_upd_rec_sys_fields(
|
|
/*===================*/
|
|
rec_t* rec, /* in: record */
|
|
dict_index_t* index, /* in: clustered index */
|
|
trx_t* trx, /* in: transaction */
|
|
dulint roll_ptr)/* in: roll ptr of the undo log record */
|
|
{
|
|
ut_ad(index->type & DICT_CLUSTERED);
|
|
#ifdef UNIV_SYNC_DEBUG
|
|
ut_ad(!buf_block_align(rec)->is_hashed
|
|
|| rw_lock_own(&btr_search_latch, RW_LOCK_EX));
|
|
#endif /* UNIV_SYNC_DEBUG */
|
|
|
|
row_set_rec_trx_id(rec, index, trx->id);
|
|
row_set_rec_roll_ptr(rec, index, roll_ptr);
|
|
}
|