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Reduce the next-key locking of READ UNCOMMITTED to match that of

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READ COMMITTED in the InnoDB Plugin. (Bug #48607)
This commit is contained in:
Marko Makela
2010-04-29 15:27:43 +02:00
parent 6fa8e485e5
commit 74ae1326c9
5 changed files with 25 additions and 18 deletions
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7
storage/innodb_plugin/ChangeLog
View File

@@ -1,3 +1,10 @@
2010-04-27 The InnoDB Team
* handler/ha_innodb.cc, lock/lock0lock.c, row/row0mysql.c,
row/row0sel.c:
Fix Bug#48607 READ UNCOMMITTED uses more locks than READ COMMITTED
in InnoDB 5.1+
2010-04-26 The InnoDB Team 2010-04-26 The InnoDB Team
* row/row0sel.c: * row/row0sel.c:

6
storage/innodb_plugin/handler/ha_innodb.cc
View File

@@ -5137,7 +5137,7 @@ ha_innobase::unlock_row(void)
case ROW_READ_WITH_LOCKS: case ROW_READ_WITH_LOCKS:
if (!srv_locks_unsafe_for_binlog if (!srv_locks_unsafe_for_binlog
&& prebuilt->trx->isolation_level && prebuilt->trx->isolation_level
!= TRX_ISO_READ_COMMITTED) { > TRX_ISO_READ_COMMITTED) {
break; break;
} }
/* fall through */ /* fall through */
@@ -5176,7 +5176,7 @@ ha_innobase::try_semi_consistent_read(bool yes)
if (yes if (yes
&& (srv_locks_unsafe_for_binlog && (srv_locks_unsafe_for_binlog
|| prebuilt->trx->isolation_level == TRX_ISO_READ_COMMITTED)) { || prebuilt->trx->isolation_level <= TRX_ISO_READ_COMMITTED)) {
prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT; prebuilt->row_read_type = ROW_READ_TRY_SEMI_CONSISTENT;
} else { } else {
prebuilt->row_read_type = ROW_READ_WITH_LOCKS; prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
@@ -9095,7 +9095,7 @@ ha_innobase::store_lock(
isolation_level = trx->isolation_level; isolation_level = trx->isolation_level;
if ((srv_locks_unsafe_for_binlog if ((srv_locks_unsafe_for_binlog
|| isolation_level == TRX_ISO_READ_COMMITTED) || isolation_level <= TRX_ISO_READ_COMMITTED)
&& isolation_level != TRX_ISO_SERIALIZABLE && isolation_level != TRX_ISO_SERIALIZABLE
&& (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT) && (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
&& (sql_command == SQLCOM_INSERT_SELECT && (sql_command == SQLCOM_INSERT_SELECT

2
storage/innodb_plugin/lock/lock0lock.c
View File

@@ -2400,7 +2400,7 @@ lock_rec_inherit_to_gap(
if (!lock_rec_get_insert_intention(lock) if (!lock_rec_get_insert_intention(lock)
&& !((srv_locks_unsafe_for_binlog && !((srv_locks_unsafe_for_binlog
|| lock->trx->isolation_level || lock->trx->isolation_level
== TRX_ISO_READ_COMMITTED) <= TRX_ISO_READ_COMMITTED)
&& lock_get_mode(lock) == LOCK_X)) { && lock_get_mode(lock) == LOCK_X)) {
lock_rec_add_to_queue(LOCK_REC | LOCK_GAP lock_rec_add_to_queue(LOCK_REC | LOCK_GAP

2
storage/innodb_plugin/row/row0mysql.c
View File

@@ -1458,7 +1458,7 @@ row_unlock_for_mysql(
if (UNIV_UNLIKELY if (UNIV_UNLIKELY
(!srv_locks_unsafe_for_binlog (!srv_locks_unsafe_for_binlog
&& trx->isolation_level != TRX_ISO_READ_COMMITTED)) { && trx->isolation_level > TRX_ISO_READ_COMMITTED)) {
fprintf(stderr, fprintf(stderr,
"InnoDB: Error: calling row_unlock_for_mysql though\n" "InnoDB: Error: calling row_unlock_for_mysql though\n"

26
storage/innodb_plugin/row/row0sel.c
View File

@@ -852,7 +852,7 @@ row_sel_get_clust_rec(
trx = thr_get_trx(thr); trx = thr_get_trx(thr);
if (srv_locks_unsafe_for_binlog if (srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) { || trx->isolation_level <= TRX_ISO_READ_COMMITTED) {
lock_type = LOCK_REC_NOT_GAP; lock_type = LOCK_REC_NOT_GAP;
} else { } else {
lock_type = LOCK_ORDINARY; lock_type = LOCK_ORDINARY;
@@ -1465,7 +1465,7 @@ rec_loop:
if (srv_locks_unsafe_for_binlog if (srv_locks_unsafe_for_binlog
|| trx->isolation_level || trx->isolation_level
== TRX_ISO_READ_COMMITTED) { <= TRX_ISO_READ_COMMITTED) {
if (page_rec_is_supremum(next_rec)) { if (page_rec_is_supremum(next_rec)) {
@@ -1522,7 +1522,7 @@ skip_lock:
trx = thr_get_trx(thr); trx = thr_get_trx(thr);
if (srv_locks_unsafe_for_binlog if (srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) { || trx->isolation_level <= TRX_ISO_READ_COMMITTED) {
if (page_rec_is_supremum(rec)) { if (page_rec_is_supremum(rec)) {
@@ -3665,7 +3665,7 @@ shortcut_fails_too_big_rec:
&& !page_rec_is_supremum(rec) && !page_rec_is_supremum(rec)
&& set_also_gap_locks && set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog && !(srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a gap lock on the next index record /* Try to place a gap lock on the next index record
@@ -3761,7 +3761,7 @@ rec_loop:
if (set_also_gap_locks if (set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog && !(srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a lock on the index record */ /* Try to place a lock on the index record */
@@ -3895,7 +3895,7 @@ wrong_offs:
if (set_also_gap_locks if (set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog && !(srv_locks_unsafe_for_binlog
|| trx->isolation_level || trx->isolation_level
== TRX_ISO_READ_COMMITTED) <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a gap lock on the index /* Try to place a gap lock on the index
@@ -3931,7 +3931,7 @@ wrong_offs:
if (set_also_gap_locks if (set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog && !(srv_locks_unsafe_for_binlog
|| trx->isolation_level || trx->isolation_level
== TRX_ISO_READ_COMMITTED) <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a gap lock on the index /* Try to place a gap lock on the index
@@ -3979,7 +3979,7 @@ wrong_offs:
if (!set_also_gap_locks if (!set_also_gap_locks
|| srv_locks_unsafe_for_binlog || srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED || trx->isolation_level <= TRX_ISO_READ_COMMITTED
|| (unique_search || (unique_search
&& !UNIV_UNLIKELY(rec_get_deleted_flag(rec, comp)))) { && !UNIV_UNLIKELY(rec_get_deleted_flag(rec, comp)))) {
@@ -4018,7 +4018,7 @@ no_gap_lock:
const rec_t* old_vers; const rec_t* old_vers;
case DB_SUCCESS: case DB_SUCCESS:
if (srv_locks_unsafe_for_binlog if (srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) { || trx->isolation_level <= TRX_ISO_READ_COMMITTED) {
/* Note that a record of /* Note that a record of
prebuilt->index was locked. */ prebuilt->index was locked. */
prebuilt->new_rec_locks = 1; prebuilt->new_rec_locks = 1;
@@ -4151,7 +4151,7 @@ no_gap_lock:
/* The record is delete-marked: we can skip it */ /* The record is delete-marked: we can skip it */
if ((srv_locks_unsafe_for_binlog if ((srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE && prebuilt->select_lock_type != LOCK_NONE
&& !did_semi_consistent_read) { && !did_semi_consistent_read) {
@@ -4218,7 +4218,7 @@ requires_clust_rec:
} }
if ((srv_locks_unsafe_for_binlog if ((srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* Note that both the secondary index record /* Note that both the secondary index record
and the clustered index record were locked. */ and the clustered index record were locked. */
@@ -4231,7 +4231,7 @@ requires_clust_rec:
/* The record is delete marked: we can skip it */ /* The record is delete marked: we can skip it */
if ((srv_locks_unsafe_for_binlog if ((srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) { && prebuilt->select_lock_type != LOCK_NONE) {
/* No need to keep a lock on a delete-marked /* No need to keep a lock on a delete-marked
@@ -4442,7 +4442,7 @@ lock_wait_or_error:
moves_up, &mtr); moves_up, &mtr);
if ((srv_locks_unsafe_for_binlog if ((srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED) || trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& !same_user_rec) { && !same_user_rec) {
/* Since we were not able to restore the cursor /* Since we were not able to restore the cursor