row_search_for_mysql(): Never try semi-consistent read in unique searches.

They are only useful in table scans. (Bug #52663)

mysql-test/suite/innodb/r/innodb_bug52663.result

+set session transaction isolation level read committed;
+create table innodb_bug52663 (what varchar(5), id integer, count integer, primary key
+(what, id)) engine=innodb;
+insert into innodb_bug52663 values ('total', 0, 0);
+begin;
+set session transaction isolation level read committed;
+begin;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+what	id	count
+total	0	1
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+select * from innodb_bug52663;
+what	id	count
+total	0	0
+commit;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+commit;
+select * from innodb_bug52663;
+what	id	count
+total	0	2
+select * from innodb_bug52663;
+what	id	count
+total	0	2
+drop table innodb_bug52663;

mysql-test/suite/innodb/t/innodb_bug52663-master.opt

+--innodb_lock_wait_timeout=1

mysql-test/suite/innodb/t/innodb_bug52663.test

+--source include/have_innodb.inc
+
+set session transaction isolation level read committed;
+
+create table innodb_bug52663 (what varchar(5), id integer, count integer, primary key
+(what, id)) engine=innodb;
+insert into innodb_bug52663 values ('total', 0, 0);
+begin;
+
+connect (addconroot, localhost, root,,);
+connection addconroot;
+set session transaction isolation level read committed;
+begin;
+
+connection default;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+
+connection addconroot;
+--error ER_LOCK_WAIT_TIMEOUT
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+
+connection default;
+commit;
+
+connection addconroot;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+commit;
+select * from innodb_bug52663;
+
+connection default;
+select * from innodb_bug52663;
+drop table innodb_bug52663;

mysql-test/suite/innodb_plugin/r/innodb_bug52663.result

+set session transaction isolation level read committed;
+create table innodb_bug52663 (what varchar(5), id integer, count integer, primary key
+(what, id)) engine=innodb;
+insert into innodb_bug52663 values ('total', 0, 0);
+begin;
+set session transaction isolation level read committed;
+begin;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+what	id	count
+total	0	1
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+select * from innodb_bug52663;
+what	id	count
+total	0	0
+commit;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+commit;
+select * from innodb_bug52663;
+what	id	count
+total	0	2
+select * from innodb_bug52663;
+what	id	count
+total	0	2
+drop table innodb_bug52663;

mysql-test/suite/innodb_plugin/t/innodb_bug52663.test

+--source include/have_innodb_plugin.inc
+
+set session transaction isolation level read committed;
+
+create table innodb_bug52663 (what varchar(5), id integer, count integer, primary key
+(what, id)) engine=innodb;
+insert into innodb_bug52663 values ('total', 0, 0);
+begin;
+
+connect (addconroot, localhost, root,,);
+connection addconroot;
+set session transaction isolation level read committed;
+begin;
+
+connection default;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+
+connection addconroot;
+--error ER_LOCK_WAIT_TIMEOUT
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+select * from innodb_bug52663;
+
+connection default;
+commit;
+
+connection addconroot;
+update innodb_bug52663 set count = count + 1 where what = 'total' and id = 0;
+commit;
+select * from innodb_bug52663;
+
+connection default;
+select * from innodb_bug52663;
+drop table innodb_bug52663;

storage/innobase/row/row0sel.c

@@ -3956,6 +3956,7 @@ row_search_for_mysql(
 		case DB_LOCK_WAIT:
 			if (UNIV_LIKELY(prebuilt->row_read_type
 					!= ROW_READ_TRY_SEMI_CONSISTENT)
+			    || unique_search
 			    || index != clust_index) {
 
 				goto lock_wait_or_error;

storage/innodb_plugin/ChangeLog

+2010-04-26	The InnoDB Team
+
+	* row/row0sel.c:
+	Fix Bug#52663 Lost update incrementing column value under
+	READ COMMITTED isolation level
+
 2010-04-22	The InnoDB Team
 
 	* include/dict0boot.h, dict/dict0boot.c:

storage/innodb_plugin/row/row0sel.c

@@ -4027,6 +4027,7 @@ row_search_for_mysql(
 		case DB_LOCK_WAIT:
 			if (UNIV_LIKELY(prebuilt->row_read_type
 					!= ROW_READ_TRY_SEMI_CONSISTENT)
+			    || unique_search
 			    || index != clust_index) {
 
 				goto lock_wait_or_error;