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Commit bd178801 authored by Marko Makela's avatar Marko Makela
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Reduce the next-key locking of READ UNCOMMITTED to match that of 

READ COMMITTED in the InnoDB Plugin. (Bug #48607)
parent 792ea1f6
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Showing with 25 additions and 18 deletions
storage/innodb_plugin/ChangeLog
View file @ bd178801
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
* row/row0sel.c:
......
storage/innodb_plugin/handler/ha_innodb.cc
View file @ bd178801
......@@ -5137,7 +5137,7 @@ ha_innobase::unlock_row(void)
case ROW_READ_WITH_LOCKS:
if (!srv_locks_unsafe_for_binlog
&& prebuilt->trx->isolation_level
!= TRX_ISO_READ_COMMITTED) {
> TRX_ISO_READ_COMMITTED) {
break;
}
/* fall through */
......@@ -5176,7 +5176,7 @@ ha_innobase::try_semi_consistent_read(bool yes)
if (yes
&& (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;
} else {
prebuilt->row_read_type = ROW_READ_WITH_LOCKS;
......@@ -9095,7 +9095,7 @@ ha_innobase::store_lock(
isolation_level = trx->isolation_level;
if ((srv_locks_unsafe_for_binlog
|| isolation_level == TRX_ISO_READ_COMMITTED)
|| isolation_level <= TRX_ISO_READ_COMMITTED)
&& isolation_level != TRX_ISO_SERIALIZABLE
&& (lock_type == TL_READ || lock_type == TL_READ_NO_INSERT)
&& (sql_command == SQLCOM_INSERT_SELECT
......
storage/innodb_plugin/lock/lock0lock.c
View file @ bd178801
......@@ -2400,7 +2400,7 @@ lock_rec_inherit_to_gap(
if (!lock_rec_get_insert_intention(lock)
&& !((srv_locks_unsafe_for_binlog
|| lock->trx->isolation_level
== TRX_ISO_READ_COMMITTED)
<= TRX_ISO_READ_COMMITTED)
&& lock_get_mode(lock) == LOCK_X)) {
lock_rec_add_to_queue(LOCK_REC | LOCK_GAP
......
storage/innodb_plugin/row/row0mysql.c
View file @ bd178801
......@@ -1458,7 +1458,7 @@ row_unlock_for_mysql(
if (UNIV_UNLIKELY
(!srv_locks_unsafe_for_binlog
&& trx->isolation_level != TRX_ISO_READ_COMMITTED)) {
&& trx->isolation_level > TRX_ISO_READ_COMMITTED)) {
fprintf(stderr,
"InnoDB: Error: calling row_unlock_for_mysql though\n"
......
storage/innodb_plugin/row/row0sel.c
View file @ bd178801
......@@ -852,7 +852,7 @@ row_sel_get_clust_rec(
trx = thr_get_trx(thr);
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;
} else {
lock_type = LOCK_ORDINARY;
......@@ -1465,7 +1465,7 @@ row_sel(
if (srv_locks_unsafe_for_binlog
|| trx->isolation_level
== TRX_ISO_READ_COMMITTED) {
<= TRX_ISO_READ_COMMITTED) {
if (page_rec_is_supremum(next_rec)) {
......@@ -1522,7 +1522,7 @@ row_sel(
trx = thr_get_trx(thr);
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)) {
......@@ -3665,7 +3665,7 @@ row_search_for_mysql(
&& !page_rec_is_supremum(rec)
&& set_also_gap_locks
&& !(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) {
/* Try to place a gap lock on the next index record
......@@ -3761,7 +3761,7 @@ row_search_for_mysql(
if (set_also_gap_locks
&& !(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) {
/* Try to place a lock on the index record */
......@@ -3895,7 +3895,7 @@ row_search_for_mysql(
if (set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog
|| trx->isolation_level
== TRX_ISO_READ_COMMITTED)
<= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a gap lock on the index
......@@ -3931,7 +3931,7 @@ row_search_for_mysql(
if (set_also_gap_locks
&& !(srv_locks_unsafe_for_binlog
|| trx->isolation_level
== TRX_ISO_READ_COMMITTED)
<= TRX_ISO_READ_COMMITTED)
&& prebuilt->select_lock_type != LOCK_NONE) {
/* Try to place a gap lock on the index
......@@ -3979,7 +3979,7 @@ row_search_for_mysql(
if (!set_also_gap_locks
|| srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED
|| trx->isolation_level <= TRX_ISO_READ_COMMITTED
|| (unique_search
&& !UNIV_UNLIKELY(rec_get_deleted_flag(rec, comp)))) {
......@@ -4018,7 +4018,7 @@ row_search_for_mysql(
const rec_t* old_vers;
case DB_SUCCESS:
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
prebuilt->index was locked. */
prebuilt->new_rec_locks = 1;
......@@ -4151,7 +4151,7 @@ row_search_for_mysql(
/* The record is delete-marked: we can skip it */
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
&& !did_semi_consistent_read) {
......@@ -4218,7 +4218,7 @@ row_search_for_mysql(
}
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) {
/* Note that both the secondary index record
and the clustered index record were locked. */
......@@ -4231,7 +4231,7 @@ row_search_for_mysql(
/* The record is delete marked: we can skip it */
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) {
/* No need to keep a lock on a delete-marked
......@@ -4442,7 +4442,7 @@ row_search_for_mysql(
moves_up, &mtr);
if ((srv_locks_unsafe_for_binlog
|| trx->isolation_level == TRX_ISO_READ_COMMITTED)
|| trx->isolation_level <= TRX_ISO_READ_COMMITTED)
&& !same_user_rec) {
/* Since we were not able to restore the cursor
......
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