/***********************************************************//**
Undoes a modify in a clustered index record.
@return DB_SUCCESS, DB_FAIL, or error code: we may run out of file space */
static
ulint
row_undo_mod_clust_low(
/*===================*/
undo_node_t* node, /*!< in: row undo node */
que_thr_t* thr, /*!< in: query thread */
mtr_t* mtr, /*!< in: mtr; must be committed before
latching any further pages */
ulint mode) /*!< in: BTR_MODIFY_LEAF or BTR_MODIFY_TREE */
{
btr_pcur_t* pcur;
btr_cur_t* btr_cur;
ulint err;
#ifdef UNIV_DEBUG
ibool success;
#endif /* UNIV_DEBUG */
pcur = &(node->pcur);
btr_cur = btr_pcur_get_btr_cur(pcur);
#ifdef UNIV_DEBUG
success =
#endif /* UNIV_DEBUG */
btr_pcur_restore_position(mode, pcur, mtr);
ut_ad(success);
if (mode == BTR_MODIFY_LEAF) {
err = btr_cur_optimistic_update(BTR_NO_LOCKING_FLAG
| BTR_NO_UNDO_LOG_FLAG
| BTR_KEEP_SYS_FLAG,
btr_cur, node->update,
node->cmpl_info, thr, mtr);
} else {
mem_heap_t* heap = NULL;
big_rec_t* dummy_big_rec;
ut_ad(mode == BTR_MODIFY_TREE);
err = btr_cur_pessimistic_update(
BTR_NO_LOCKING_FLAG
| BTR_NO_UNDO_LOG_FLAG
| BTR_KEEP_SYS_FLAG,
btr_cur, &heap, &dummy_big_rec, node->update,
node->cmpl_info, thr, mtr);
ut_a(!dummy_big_rec);
if (UNIV_LIKELY_NULL(heap)) {
mem_heap_free(heap);
}
}
return(err);
}
/***************************************************************
Undoes a modify in a clustered index record. */
static
ulint
row_undo_mod_clust_low(
/*===================*/
/* out: DB_SUCCESS, DB_FAIL, or error code:
we may run out of file space */
undo_node_t* node, /* in: row undo node */
que_thr_t* thr, /* in: query thread */
mtr_t* mtr, /* in: mtr */
ulint mode) /* in: BTR_MODIFY_LEAF or BTR_MODIFY_TREE */
{
big_rec_t* dummy_big_rec;
btr_pcur_t* pcur;
btr_cur_t* btr_cur;
ulint err;
#ifdef UNIV_DEBUG
ibool success;
#endif /* UNIV_DEBUG */
pcur = &(node->pcur);
btr_cur = btr_pcur_get_btr_cur(pcur);
#ifdef UNIV_DEBUG
success =
#endif /* UNIV_DEBUG */
btr_pcur_restore_position(mode, pcur, mtr);
ut_ad(success);
if (mode == BTR_MODIFY_LEAF) {
err = btr_cur_optimistic_update(BTR_NO_LOCKING_FLAG
| BTR_NO_UNDO_LOG_FLAG
| BTR_KEEP_SYS_FLAG,
btr_cur, node->update,
node->cmpl_info, thr, mtr);
} else {
ut_ad(mode == BTR_MODIFY_TREE);
err = btr_cur_pessimistic_update(
BTR_NO_LOCKING_FLAG
| BTR_NO_UNDO_LOG_FLAG
| BTR_KEEP_SYS_FLAG,
btr_cur, &dummy_big_rec, node->update,
node->cmpl_info, thr, mtr);
}
return(err);
}
/***************************************************************
Updates a clustered index record of a row when the ordering fields do
not change. */
static
ulint
row_upd_clust_rec(
/*==============*/
/* out: DB_SUCCESS if operation successfully
completed, else error code or DB_LOCK_WAIT */
upd_node_t* node, /* in: row update node */
dict_index_t* index, /* in: clustered index */
que_thr_t* thr, /* in: query thread */
mtr_t* mtr) /* in: mtr; gets committed here */
{
big_rec_t* big_rec = NULL;
btr_pcur_t* pcur;
btr_cur_t* btr_cur;
ulint err;
ut_ad(node);
ut_ad(index->type & DICT_CLUSTERED);
pcur = node->pcur;
btr_cur = btr_pcur_get_btr_cur(pcur);
ut_ad(FALSE == rec_get_deleted_flag(btr_pcur_get_rec(pcur)));
/* Try optimistic updating of the record, keeping changes within
the page; we do not check locks because we assume the x-lock on the
record to update */
if (node->cmpl_info & UPD_NODE_NO_SIZE_CHANGE) {
err = btr_cur_update_in_place(BTR_NO_LOCKING_FLAG,
btr_cur, node->update,
node->cmpl_info, thr, mtr);
} else {
err = btr_cur_optimistic_update(BTR_NO_LOCKING_FLAG,
btr_cur, node->update,
node->cmpl_info, thr, mtr);
}
mtr_commit(mtr);
if (err == DB_SUCCESS) {
return(err);
}
/* We may have to modify the tree structure: do a pessimistic descent
down the index tree */
mtr_start(mtr);
/* NOTE: this transaction has an s-lock or x-lock on the record and
therefore other transactions cannot modify the record when we have no
latch on the page. In addition, we assume that other query threads of
the same transaction do not modify the record in the meantime.
Therefore we can assert that the restoration of the cursor succeeds. */
ut_a(btr_pcur_restore_position(BTR_MODIFY_TREE, pcur, mtr));
ut_ad(FALSE == rec_get_deleted_flag(btr_pcur_get_rec(pcur)));
err = btr_cur_pessimistic_update(BTR_NO_LOCKING_FLAG, btr_cur,
&big_rec, node->update,
node->cmpl_info, thr, mtr);
mtr_commit(mtr);
if (err == DB_SUCCESS && big_rec) {
mtr_start(mtr);
ut_a(btr_pcur_restore_position(BTR_MODIFY_TREE, pcur, mtr));
err = btr_store_big_rec_extern_fields(index,
btr_cur_get_rec(btr_cur),
big_rec, mtr);
mtr_commit(mtr);
}
if (big_rec) {
dtuple_big_rec_free(big_rec);
}
return(err);
}
/***********************************************************//**
Delete unmarks a secondary index entry which must be found. It might not be
delete-marked at the moment, but it does not harm to unmark it anyway. We also
need to update the fields of the secondary index record if we updated its
fields but alphabetically they stayed the same, e.g., 'abc' -> 'aBc'.
@return DB_FAIL or DB_SUCCESS or DB_OUT_OF_FILE_SPACE */
static
ulint
row_undo_mod_del_unmark_sec_and_undo_update(
/*========================================*/
ulint mode, /*!< in: search mode: BTR_MODIFY_LEAF or
BTR_MODIFY_TREE */
que_thr_t* thr, /*!< in: query thread */
dict_index_t* index, /*!< in: index */
const dtuple_t* entry) /*!< in: index entry */
{
mem_heap_t* heap;
btr_pcur_t pcur;
btr_cur_t* btr_cur;
upd_t* update;
ulint err = DB_SUCCESS;
big_rec_t* dummy_big_rec;
mtr_t mtr;
trx_t* trx = thr_get_trx(thr);
enum row_search_result search_result;
/* Ignore indexes that are being created. */
if (UNIV_UNLIKELY(*index->name == TEMP_INDEX_PREFIX)) {
return(DB_SUCCESS);
}
log_free_check();
mtr_start(&mtr);
ut_ad(mode == BTR_MODIFY_TREE || mode == BTR_MODIFY_LEAF);
search_result = row_search_index_entry(index, entry, mode,
&pcur, &mtr);
switch (search_result) {
case ROW_BUFFERED:
case ROW_NOT_DELETED_REF:
/* These are invalid outcomes, because the mode passed
to row_search_index_entry() did not include any of the
flags BTR_INSERT, BTR_DELETE, or BTR_DELETE_MARK. */
ut_error;
case ROW_NOT_FOUND:
fputs("InnoDB: error in sec index entry del undo in\n"
"InnoDB: ", stderr);
dict_index_name_print(stderr, trx, index);
fputs("\n"
"InnoDB: tuple ", stderr);
dtuple_print(stderr, entry);
fputs("\n"
"InnoDB: record ", stderr);
rec_print(stderr, btr_pcur_get_rec(&pcur), index);
putc('\n', stderr);
trx_print(stderr, trx, 0);
fputs("\n"
"InnoDB: Submit a detailed bug report"
" to http://bugs.mysql.com\n", stderr);
break;
case ROW_FOUND:
btr_cur = btr_pcur_get_btr_cur(&pcur);
err = btr_cur_del_mark_set_sec_rec(BTR_NO_LOCKING_FLAG,
btr_cur, FALSE, thr, &mtr);
ut_a(err == DB_SUCCESS);
heap = mem_heap_create(100);
update = row_upd_build_sec_rec_difference_binary(
index, entry, btr_cur_get_rec(btr_cur), trx, heap);
if (upd_get_n_fields(update) == 0) {
/* Do nothing */
} else if (mode == BTR_MODIFY_LEAF) {
/* Try an optimistic updating of the record, keeping
changes within the page */
err = btr_cur_optimistic_update(
BTR_KEEP_SYS_FLAG | BTR_NO_LOCKING_FLAG,
btr_cur, update, 0, thr, &mtr);
switch (err) {
case DB_OVERFLOW:
case DB_UNDERFLOW:
case DB_ZIP_OVERFLOW:
err = DB_FAIL;
}
} else {
ut_a(mode == BTR_MODIFY_TREE);
err = btr_cur_pessimistic_update(
BTR_KEEP_SYS_FLAG | BTR_NO_LOCKING_FLAG,
btr_cur, &heap, &dummy_big_rec,
update, 0, thr, &mtr);
ut_a(!dummy_big_rec);
}
mem_heap_free(heap);
}
btr_pcur_close(&pcur);
mtr_commit(&mtr);
return(err);
}
