Merge joreland@bk-internal.mysql.com:/home/bk/mysql-4.1

into mysql.com:/home/jonas/src/mysql-4.1


ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  Auto merged

myisam/mi_create.c

@@ -533,6 +533,21 @@ int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
     create_flag=MY_DELETE_OLD;
   }
 
+  /*
+    If a MRG_MyISAM table is in use, the mapped MyISAM tables are open,
+    but no entry is made in the table cache for them.
+    A TRUNCATE command checks for the table in the cache only and could
+    be fooled to believe, the table is not open.
+    Pull the emergency brake in this situation. (Bug #8306)
+  */
+  if (test_if_reopen(filename))
+  {
+    my_printf_error(0, "MyISAM table '%s' is in use "
+                    "(most likely by a MERGE table). Try FLUSH TABLES.",
+                    MYF(0), name + dirname_length(name));
+    goto err;
+  }
+
   if ((file= my_create_with_symlink(linkname_ptr,
 				    filename,
 				    0, O_RDWR | O_TRUNC,

myisam/mi_open.c

@@ -50,7 +50,7 @@ if (pos > end_pos)             \
 ** In MySQL the server will handle version issues.
 ******************************************************************************/
 
-static MI_INFO *test_if_reopen(char *filename)
+MI_INFO *test_if_reopen(char *filename)
 {
   LIST *pos;
 

myisam/myisamdef.h

@@ -705,6 +705,7 @@ void mi_copy_status(void* to,void *from);
 my_bool mi_check_status(void* param);
 void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows);
 
+extern MI_INFO *test_if_reopen(char *filename);
 my_bool check_table_is_closed(const char *name, const char *where);
 int mi_open_datafile(MI_INFO *info, MYISAM_SHARE *share, File file_to_dup);
 int mi_open_keyfile(MYISAM_SHARE *share);

mysql-test/r/bigint.result

@@ -87,3 +87,42 @@ drop table t1;
 SELECT '0x8000000000000001'+0;
 '0x8000000000000001'+0
 0
+create table t1 (
+value64  bigint unsigned  not null,
+value32  integer          not null,
+primary key(value64, value32)
+);
+create table t2 (
+value64  bigint unsigned  not null,
+value32  integer          not null,
+primary key(value64, value32)
+);
+insert into t1 values(17156792991891826145, 1);
+insert into t1 values( 9223372036854775807, 2);
+insert into t2 values(17156792991891826145, 3);
+insert into t2 values( 9223372036854775807, 4);
+select * from t1;
+value64	value32
+9223372036854775807	2
+17156792991891826145	1
+select * from t2;
+value64	value32
+9223372036854775807	4
+17156792991891826145	3
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=17156792991891826145;
+value64	value32	value64	value32
+17156792991891826145	1	17156792991891826145	3
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=t1.value64;
+value64	value32	value64	value32
+17156792991891826145	1	17156792991891826145	3
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=9223372036854775807;
+value64	value32	value64	value32
+9223372036854775807	2	9223372036854775807	4
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=t1.value64;
+value64	value32	value64	value32
+9223372036854775807	2	9223372036854775807	4
+drop table t1, t2;

mysql-test/r/myisam.result

@@ -555,3 +555,21 @@ select count(*) from t1 where a is null;
 count(*)
 2
 drop table t1;
+create table t1 (c1 int, index(c1));
+create table t2 (c1 int, index(c1)) engine=merge union=(t1);
+insert into t1 values (1);
+flush tables;
+select * from t2;
+c1
+1
+flush tables;
+truncate table t1;
+insert into t1 values (1);
+flush tables;
+select * from t2;
+c1
+1
+truncate table t1;
+ERROR HY000: MyISAM table 't1' is in use (most likely by a MERGE table). Try FLUSH TABLES.
+insert into t1 values (1);
+drop table t1,t2;

mysql-test/r/ps.result

@@ -482,3 +482,15 @@ execute stmt;
 pnum
 deallocate prepare stmt;
 drop table t1, t2;
+prepare stmt from "SELECT SQL_CALC_FOUND_ROWS 'foo' UNION SELECT 'bar' LIMIT 0";
+execute stmt;
+foo
+SELECT FOUND_ROWS();
+FOUND_ROWS()
+2
+execute stmt;
+foo
+SELECT FOUND_ROWS();
+FOUND_ROWS()
+2
+deallocate prepare stmt;

mysql-test/r/rpl_deadlock.result

+stop slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+start slave;
+create table t1 (a int not null, key(a)) engine=innodb;
+create table t2 (a int not null, key(a)) engine=innodb;
+create table t3 (a int) engine=innodb;
+create table t4 (a int) engine=innodb;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` int(11) NOT NULL default '0',
+  KEY `a` (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+show create table t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(11) NOT NULL default '0',
+  KEY `a` (`a`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+stop slave;
+begin;
+insert into t3 select * from t2 for update;
+insert into t1 values(1);
+commit;
+begin;
+select * from t1 for update;
+a
+start slave;
+insert into t2 values(22);
+commit;
+select * from t1;
+a
+1
+select * from t2;
+a
+22
+show slave status;
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
+#	127.0.0.1	root	MASTER_MYPORT	1	master-bin.000001	13110	#	#	master-bin.000001	Yes	Yes							0		0	13110	#	None		0	No						#
+stop slave;
+change master to master_log_pos=401;
+begin;
+select * from t2 for update;
+a
+22
+start slave;
+commit;
+select * from t1;
+a
+1
+1
+select * from t2;
+a
+22
+show slave status;
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
+#	127.0.0.1	root	MASTER_MYPORT	1	master-bin.000001	13110	#	#	master-bin.000001	Yes	Yes							0		0	13110	#	None		0	No						#
+set global max_relay_log_size=0;
+stop slave;
+change master to master_log_pos=401;
+begin;
+select * from t2 for update;
+a
+22
+start slave;
+commit;
+select * from t1;
+a
+1
+1
+1
+select * from t2;
+a
+22
+show slave status;
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
+#	127.0.0.1	root	MASTER_MYPORT	1	master-bin.000001	13110	#	#	master-bin.000001	Yes	Yes							0		0	13110	#	None		0	No						#
+drop table t1,t2;

mysql-test/t/bigint.test

@@ -71,3 +71,36 @@ drop table t1;
 # atof() behaviour is different of different systems. to be fixed in 4.1
 SELECT '0x8000000000000001'+0;
 
+# Test for BUG#8562: joins over BIGINT UNSIGNED value + constant propagation
+create table t1 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+create table t2 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+insert into t1 values(17156792991891826145, 1);
+insert into t1 values( 9223372036854775807, 2);
+insert into t2 values(17156792991891826145, 3);
+insert into t2 values( 9223372036854775807, 4);
+
+select * from t1;
+select * from t2;
+
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=17156792991891826145;
+select * from t1, t2 where t1.value64=17156792991891826145 and
+t2.value64=t1.value64;
+
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=9223372036854775807;
+select * from t1, t2 where t1.value64= 9223372036854775807 and
+t2.value64=t1.value64;
+
+drop table t1, t2;
+

mysql-test/t/myisam.test

@@ -524,3 +524,29 @@ explain select count(*) from t1 where a is null;
 select count(*) from t1 where a is null;
 drop table t1;
 
+#
+# Bug #8306: TRUNCATE leads to index corruption 
+#
+create table t1 (c1 int, index(c1));
+create table t2 (c1 int, index(c1)) engine=merge union=(t1);
+insert into t1 values (1);
+# Close all tables.
+flush tables;
+# Open t2 and (implicitly) t1.
+select * from t2;
+# Truncate after flush works (unless another threads reopens t2 in between).
+flush tables;
+truncate table t1;
+insert into t1 values (1);
+# Close all tables.
+flush tables;
+# Open t2 and (implicitly) t1.
+select * from t2;
+# Truncate t1, wich was not recognized as open without the bugfix.
+# Now, it should fail with a table-in-use error message.
+--error 1105
+truncate table t1;
+# The insert used to fail on the crashed table.
+insert into t1 values (1);
+drop table t1,t2;
+

mysql-test/t/ps.test

@@ -485,3 +485,14 @@ execute stmt;
 deallocate prepare stmt;
 drop table t1, t2;
 
+
+#
+# Bug #6089: FOUND_ROWS returns wrong values when no table/view is used 
+#
+
+prepare stmt from "SELECT SQL_CALC_FOUND_ROWS 'foo' UNION SELECT 'bar' LIMIT 0";
+execute stmt;
+SELECT FOUND_ROWS();
+execute stmt;                                                                   
+SELECT FOUND_ROWS();                                                            
+deallocate prepare stmt;

mysql-test/t/rpl_deadlock-slave.opt

+--innodb --loose-innodb_lock_wait_timeout=4 --slave-transaction-retries=2 --max-relay-log-size=4096

mysql-test/t/rpl_deadlock.test

+# See if slave restarts the transaction after failing on an InnoDB deadlock error.
+
+# Note: testing what happens when too many retries is possible, but
+# needs large waits when running with --debug, so we don't do it.
+# The same way, this test may not test what is expected when run
+# under Valgrind, timings are too short then (with --valgrind I
+# (Guilhem) have seen the test manage to provoke lock wait timeout
+# error but not deadlock error; that is ok as code deals with the two
+# errors in exactly the same way.
+
+source include/have_innodb.inc;
+source include/master-slave.inc;
+
+connection master;
+create table t1 (a int not null, key(a)) engine=innodb;
+create table t2 (a int not null, key(a)) engine=innodb;
+create table t3 (a int) engine=innodb;
+create table t4 (a int) engine=innodb;
+sync_slave_with_master;
+
+show create table t1;
+show create table t2;
+stop slave;
+
+# 1) Test deadlock
+
+connection master;
+begin;
+# Let's keep BEGIN and the locked statement in two different relay logs.
+let $1=200;
+disable_query_log;
+while ($1)
+{
+ eval insert into t3 values( $1 );
+ dec $1;
+}
+enable_query_log;
+insert into t3 select * from t2 for update;
+insert into t1 values(1);
+commit;
+save_master_pos;
+
+connection slave;
+begin;
+# Let's make our transaction large so that it's slave who is chosen as
+# victim
+let $1=1000;
+disable_query_log;
+while ($1)
+{
+ eval insert into t4 values( $1 );
+ dec $1;
+}
+enable_query_log;
+select * from t1 for update;
+start slave;
+--sleep 3; # hope that slave is blocked now
+insert into t2 values(22); # provoke deadlock, slave should be victim
+commit;
+sync_with_master;
+select * from t1; # check that slave succeeded finally
+select * from t2;
+# check that no error is reported
+--replace_column 1 # 8 # 9 # 23 # 33 #
+--replace_result $MASTER_MYPORT MASTER_MYPORT
+show slave status;
+
+# 2) Test lock wait timeout
+
+stop slave;
+change master to master_log_pos=401; # the BEGIN log event
+begin;
+select * from t2 for update; # hold lock
+start slave;
+--sleep 10; # slave should have blocked, and be retrying
+commit;
+sync_with_master;
+select * from t1; # check that slave succeeded finally
+select * from t2;
+# check that no error is reported
+--replace_column 1 # 8 # 9 # 23 # 33 #
+--replace_result $MASTER_MYPORT MASTER_MYPORT
+show slave status;
+
+# Now we repeat 2), but with BEGIN in the same relay log as
+# COMMIT (to see if seeking into hot log is ok).
+
+set global max_relay_log_size=0;
+
+# This is really copy-paste of 2) of above
+stop slave;
+change master to master_log_pos=401;
+begin;
+select * from t2 for update;
+start slave;
+--sleep 10;
+commit;
+sync_with_master;
+select * from t1;
+select * from t2;
+--replace_column 1 # 8 # 9 # 23 # 33 #
+--replace_result $MASTER_MYPORT MASTER_MYPORT
+show slave status;
+
+connection master;
+drop table t1,t2;
+sync_slave_with_master;

ndb/src/kernel/blocks/dbtc/DbtcMain.cpp

@@ -5943,7 +5943,7 @@ int Dbtc::releaseAndAbort(Signal* signal)
       signal->theData[0] = tcConnectptr.i;
       signal->theData[1] = apiConnectptr.p->transid[0];
       signal->theData[2] = apiConnectptr.p->transid[1];
-      signal->theData[3] = hostptr.i;
+      signal->theData[3] = localHostptr.i;
       signal->theData[4] = ZFALSE;
       sendSignal(cownref, GSN_ABORTED, signal, 5, JBB);
     }//if

sql/ha_innodb.cc

@@ -2316,7 +2316,9 @@ ha_innobase::write_row(
         if (table->timestamp_field_type & TIMESTAMP_AUTO_SET_ON_INSERT)
                 table->timestamp_field->set_time();
 
-	if (user_thd->lex->sql_command == SQLCOM_ALTER_TABLE
+	if ((user_thd->lex->sql_command == SQLCOM_ALTER_TABLE
+	    || user_thd->lex->sql_command == SQLCOM_CREATE_INDEX
+	    || user_thd->lex->sql_command == SQLCOM_DROP_INDEX)
 	    && num_write_row >= 10000) {
 		/* ALTER TABLE is COMMITted at every 10000 copied rows.
 		The IX table lock for the original table has to be re-issued.

sql/ha_innodb.h

@@ -202,7 +202,6 @@ extern "C" {
 extern ulong srv_max_buf_pool_modified_pct;
 extern ulong srv_max_purge_lag;
 extern ulong srv_auto_extend_increment;
-extern ulong srv_max_purge_lag;
 }
 
 extern TYPELIB innobase_lock_typelib;

sql/item.h

@@ -997,6 +997,8 @@ class Item_null_helper :public Item_ref_null_helper
   The following class is used to optimize comparing of date and bigint columns
   We need to save the original item, to be able to set the field to the
   original value in 'opt_range'.
+  An instance of Item_int_with_ref may refer to a signed or an unsigned
+  integer.
 */
 
 class Item_int_with_ref :public Item_int
@@ -1011,6 +1013,11 @@ class Item_int_with_ref :public Item_int
   {
     return ref->save_in_field(field, no_conversions);
   }
+  Item *new_item()
+  {
+    return (ref->unsigned_flag)? new Item_uint(ref->name, ref->max_length) :
+                                 new Item_int(ref->name, ref->max_length);
+  }
 };
 
 

sql/mysql_priv.h

@@ -890,7 +890,7 @@ extern ulong ha_read_first_count, ha_read_last_count;
 extern ulong ha_read_rnd_count, ha_read_rnd_next_count, ha_discover_count;
 extern ulong ha_commit_count, ha_rollback_count,table_cache_size;
 extern ulong max_connections,max_connect_errors, connect_timeout;
-extern ulong slave_net_timeout;
+extern ulong slave_net_timeout, slave_trans_retries;
 extern ulong max_user_connections;
 extern ulong long_query_count, what_to_log,flush_time;
 extern ulong query_buff_size, thread_stack,thread_stack_min;

sql/mysqld.cc

@@ -311,7 +311,7 @@ ulong server_id, thd_startup_options;
 ulong table_cache_size, thread_stack, thread_stack_min, what_to_log;
 ulong query_buff_size, slow_launch_time, slave_open_temp_tables;
 ulong open_files_limit, max_binlog_size, max_relay_log_size;
-ulong slave_net_timeout;
+ulong slave_net_timeout, slave_trans_retries;
 ulong thread_cache_size=0, binlog_cache_size=0, max_binlog_cache_size=0;
 ulong query_cache_size=0;
 ulong com_stat[(uint) SQLCOM_END], com_other;
@@ -4108,7 +4108,7 @@ enum options_mysqld
   OPT_QUERY_CACHE_TYPE, OPT_QUERY_CACHE_WLOCK_INVALIDATE, OPT_RECORD_BUFFER,
   OPT_RECORD_RND_BUFFER, OPT_RELAY_LOG_SPACE_LIMIT, OPT_RELAY_LOG_PURGE,
   OPT_SLAVE_NET_TIMEOUT, OPT_SLAVE_COMPRESSED_PROTOCOL, OPT_SLOW_LAUNCH_TIME,
-  OPT_READONLY, OPT_DEBUGGING,
+  OPT_SLAVE_TRANS_RETRIES, OPT_READONLY, OPT_DEBUGGING,
   OPT_SORT_BUFFER, OPT_TABLE_CACHE,
   OPT_THREAD_CONCURRENCY, OPT_THREAD_CACHE_SIZE,
   OPT_TMP_TABLE_SIZE, OPT_THREAD_STACK,
@@ -5061,7 +5061,7 @@ The minimum value for this variable is 4096.",
     (gptr*) &max_system_variables.max_length_for_sort_data, 0, GET_ULONG,
     REQUIRED_ARG, 1024, 4, 8192*1024L, 0, 1, 0},
   {"max_relay_log_size", OPT_MAX_RELAY_LOG_SIZE,
-   "If non-zero: relay log will be rotated automatically when the size exceeds this value; if zero (the default): when the size exceeds max_binlog_size. 0 expected, the minimum value for this variable is 4096.",
+   "If non-zero: relay log will be rotated automatically when the size exceeds this value; if zero (the default): when the size exceeds max_binlog_size. 0 excepted, the minimum value for this variable is 4096.",
    (gptr*) &max_relay_log_size, (gptr*) &max_relay_log_size, 0, GET_ULONG,
    REQUIRED_ARG, 0L, 0L, 1024*1024L*1024L, 0, IO_SIZE, 0},
   { "max_seeks_for_key", OPT_MAX_SEEKS_FOR_KEY,
@@ -5232,6 +5232,12 @@ The minimum value for this variable is 4096.",
    "Number of seconds to wait for more data from a master/slave connection before aborting the read.",
    (gptr*) &slave_net_timeout, (gptr*) &slave_net_timeout, 0,
    GET_ULONG, REQUIRED_ARG, SLAVE_NET_TIMEOUT, 1, LONG_TIMEOUT, 0, 1, 0},
+  {"slave_transaction_retries", OPT_SLAVE_TRANS_RETRIES,
+   "Number of times the slave SQL thread will retry a transaction in case "
+   "it failed with a deadlock or elapsed lock wait timeout, "
+   "before giving up and stopping.",
+   (gptr*) &slave_trans_retries, (gptr*) &slave_trans_retries, 0,
+   GET_ULONG, REQUIRED_ARG, 0L, 0L, (longlong) ULONG_MAX, 0, 1, 0},
 #endif /* HAVE_REPLICATION */
   {"slow_launch_time", OPT_SLOW_LAUNCH_TIME,
    "If creating the thread takes longer than this value (in seconds), the Slow_launch_threads counter will be incremented.",

sql/set_var.cc

@@ -320,6 +320,8 @@ sys_var_bool_ptr	sys_slave_compressed_protocol("slave_compressed_protocol",
 #ifdef HAVE_REPLICATION
 sys_var_long_ptr	sys_slave_net_timeout("slave_net_timeout",
 					      &slave_net_timeout);
+sys_var_long_ptr	sys_slave_trans_retries("slave_transaction_retries",
+                                                &slave_trans_retries);
 #endif
 sys_var_long_ptr	sys_slow_launch_time("slow_launch_time",
 					     &slow_launch_time);
@@ -604,6 +606,7 @@ sys_var *sys_variables[]=
 #ifdef HAVE_REPLICATION
   &sys_slave_compressed_protocol,
   &sys_slave_net_timeout,
+  &sys_slave_trans_retries,
   &sys_slave_skip_counter,
 #endif
   &sys_slow_launch_time,
@@ -855,6 +858,7 @@ struct show_var_st init_vars[]= {
   {"skip_show_database",      (char*) &opt_skip_show_db,            SHOW_BOOL},
 #ifdef HAVE_REPLICATION
   {sys_slave_net_timeout.name,(char*) &sys_slave_net_timeout,	    SHOW_SYS},
+  {sys_slave_trans_retries.name,(char*) &sys_slave_trans_retries,   SHOW_SYS},
 #endif
   {sys_slow_launch_time.name, (char*) &sys_slow_launch_time,        SHOW_SYS},
 #ifdef HAVE_SYS_UN_H

sql/slave.cc

@@ -2959,6 +2959,62 @@ static int exec_relay_log_event(THD* thd, RELAY_LOG_INFO* rli)
     exec_res = ev->exec_event(rli);
     DBUG_ASSERT(rli->sql_thd==thd);
     delete ev;
+    if (slave_trans_retries)
+    {
+      if (exec_res &&
+          (thd->net.last_errno == ER_LOCK_DEADLOCK ||
+           thd->net.last_errno == ER_LOCK_WAIT_TIMEOUT) &&
+          !thd->is_fatal_error)
+      {
+        const char *errmsg;
+        /*
+          We were in a transaction which has been rolled back because of a
+          deadlock (currently, InnoDB deadlock detected by InnoDB) or lock
+          wait timeout (innodb_lock_wait_timeout exceeded); let's seek back to
+          BEGIN log event and retry it all again.
+          We have to not only seek but also
+          a) init_master_info(), to seek back to hot relay log's start for later
+          (for when we will come back to this hot log after re-processing the
+          possibly existing old logs where BEGIN is: check_binlog_magic() will
+          then need the cache to be at position 0 (see comments at beginning of
+          init_master_info()).
+          b) init_relay_log_pos(), because the BEGIN may be an older relay log.
+        */
+        if (rli->trans_retries--)
+        {
+          sql_print_information("Slave SQL thread retries transaction");
+          if (init_master_info(rli->mi, 0, 0, 0, SLAVE_SQL))
+            sql_print_error("Failed to initialize the master info structure");
+          else if (init_relay_log_pos(rli,
+                                      rli->group_relay_log_name,
+                                      rli->group_relay_log_pos,
+                                      1, &errmsg))
+            sql_print_error("Error initializing relay log position: %s",
+                            errmsg);
+          else
+          {
+            exec_res= 0;
+            sleep(2); // chance for concurrent connection to get more locks
+          }
+        }
+        else
+          sql_print_error("Slave SQL thread retried transaction %lu time(s) "
+                          "in vain, giving up. Consider raising the value of "
+                          "the slave_transaction_retries variable.",
+                          slave_trans_retries);
+      }
+      if (!((thd->options & OPTION_BEGIN) && opt_using_transactions))
+      {
+        rli->trans_retries= slave_trans_retries; // restart from fresh
+        /*
+          TODO: when merged into 5.0, when slave does auto-rollback if
+          corrupted binlog, this should reset the retry counter too
+          (any rollback should). In fact it will work, as here we are just out
+          of a Format_description_log_event::exec_event() which rolled back.
+          But check repl code in 5.0 for new ha_rollback calls, just in case.
+        */
+      }
+    }
     return exec_res;
   }
   else
@@ -3370,6 +3426,7 @@ extern "C" pthread_handler_decl(handle_slave_sql,arg)
   pthread_mutex_lock(&rli->log_space_lock);
   rli->ignore_log_space_limit= 0;
   pthread_mutex_unlock(&rli->log_space_lock);
+  rli->trans_retries= slave_trans_retries; // start from "no error"
 
   if (init_relay_log_pos(rli,
 			 rli->group_relay_log_name,

sql/slave.h

@@ -294,7 +294,9 @@ typedef struct st_relay_log_info
     UNTIL_LOG_NAMES_CMP_UNKNOWN= -2, UNTIL_LOG_NAMES_CMP_LESS= -1,
     UNTIL_LOG_NAMES_CMP_EQUAL= 0, UNTIL_LOG_NAMES_CMP_GREATER= 1
   } until_log_names_cmp_result;
-  
+
+  ulong trans_retries;
+
   st_relay_log_info();
   ~st_relay_log_info();
 

sql/sql_union.cc

@@ -215,8 +215,6 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     select_limit_cnt= sl->select_limit+sl->offset_limit;
     if (select_limit_cnt < sl->select_limit)
       select_limit_cnt= HA_POS_ERROR;		// no limit
-    if (select_limit_cnt == HA_POS_ERROR || sl->braces)
-      sl->options&= ~OPTION_FOUND_ROWS;
 
     can_skip_order_by= is_union &&
                        (!sl->braces || select_limit_cnt == HA_POS_ERROR);
@@ -342,7 +340,7 @@ int st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       if (arena->is_stmt_prepare())
       {
 	/* prepare fake select to initialize it correctly */
-	ulong options_tmp= init_prepare_fake_select_lex(thd);
+	(void) init_prepare_fake_select_lex(thd);
 	if (!(fake_select_lex->join= new JOIN(thd, item_list, thd->options,
 					      result)))
 	{
@@ -447,21 +445,14 @@ int st_select_lex_unit::exec()
 	if (select_limit_cnt < sl->select_limit)
 	  select_limit_cnt= HA_POS_ERROR;		// no limit
 
-	/*
-	  When using braces, SQL_CALC_FOUND_ROWS affects the whole query.
-	  We don't calculate found_rows() per union part
-	*/
-	if (select_limit_cnt == HA_POS_ERROR || sl->braces)
-	  sl->options&= ~OPTION_FOUND_ROWS;
-	else 
-	{
-	  /*
-	    We are doing an union without braces.  In this case
-	    SQL_CALC_FOUND_ROWS should be done on all sub parts
-	  */
-	  sl->options|= found_rows_for_union;
-	}
-	sl->join->select_options=sl->options;
+        /*
+          When using braces, SQL_CALC_FOUND_ROWS affects the whole query:
+          we don't calculate found_rows() per union part.
+          Otherwise, SQL_CALC_FOUND_ROWS should be done on all sub parts.
+        */
+        sl->join->select_options= 
+          (select_limit_cnt == HA_POS_ERROR || sl->braces) ?
+          sl->options & ~OPTION_FOUND_ROWS : sl->options | found_rows_for_union;
 	res= sl->join->optimize();
       }
       if (!res)
@@ -493,7 +484,8 @@ int st_select_lex_unit::exec()
       }
       /* Needed for the following test and for records_at_start in next loop */
       table->file->info(HA_STATUS_VARIABLE);
-      if (found_rows_for_union & sl->options)
+      if (found_rows_for_union && !sl->braces && 
+          select_limit_cnt != HA_POS_ERROR)
       {
 	/*
 	  This is a union without braces. Remember the number of rows that