Small improvement to alloc_root

Add support for LIMIT # OFFSET #
Changed lock handling:  Now all locks should be stored in TABLE_LIST instead of passed to functions.
Don't call query_cache_invalidate() twice in some cases
mysql_change_user() now clears states to be equal to close + connect.
Fixed a bug with multi-table-update and multi-table-delete when used with LOCK TABLES
Fixed a bug with replicate-do and UPDATE


BitKeeper/etc/ignore:
  added autom4te.cache/* bdb/dist/autom4te.cache/* innobase/autom4te.cache/*
include/my_alloc.h:
  Small improvement to alloc_root
libmysql/libmysql.c:
  Removed compiler warning
myisam/mi_page.c:
  Better DBUG message
mysql-test/r/multi_update.result:
  Added test with lock tables
mysql-test/r/rpl_replicate_do.result:
  Update results
mysql-test/r/rpl_rotate_logs.result:
  Make test independent of if t1 exists
mysql-test/t/multi_update.test:
  Added test with lock tables
mysql-test/t/rpl_rotate_logs.test:
  Make test independent of if t1 exists
mysys/my_alloc.c:
  Small imprevement to alloc_root
  (Don't free blocks less than ALLOC_MAX_BLOCK_ROOT (4K)
sql/ha_innodb.cc:
  More debug messages
sql/ha_myisam.cc:
  Safety change
sql/lex.h:
  Add support for LIMIT # OFFSET #
sql/lock.cc:
  Added assertion
sql/mysql_priv.h:
  Change of lock handling
sql/mysqld.cc:
  Added function clear_error_messages()
sql/sql_base.cc:
  Change lock handling by open_ltable() and open_and_lock_tables()
sql/sql_class.cc:
  Split THD::THD to two functions
  Move some code from cleanup() to ~THD:THD
  Add THD::change_user()
sql/sql_class.h:
  Prototype changes in class THD
sql/sql_delete.cc:
  Remove locking argument from mysql_delete()
  Locking type is now stored in TABLE_LIST
  Small code change to not call query_cache_invalidate() twice for transactional tables.
sql/sql_insert.cc:
  Remove locking argument from mysql_insert()
  Locking type is now stored in TABLE_LIST
  Small code change to not call query_cache_invalidate() twice for transactional tables.
  Don't use bulk insert if bulk_insert_buff_size is 0
sql/sql_parse.cc:
  Changes to make mysql_change_user() work as close+connect
  Changed command statistics to use statstics_increment to get more speed
  Update code to handle that locks is now stored in TABLE_LIST
sql/sql_update.cc:
  Remove locking argument from mysql_update()
  Locking type is now stored in TABLE_LIST
  Small code change to not call query_cache_invalidate() twice for transactional tables.
sql/sql_yacc.yy:
  Locking type is now stored in TABLE_LIST
  Added support for LIMIT # OFFSET # syntax
  Removed some wrong (never true) checks for SQLCOM_MULTI_UPDATE
mysql-test/t/rpl_replicate_do-slave.opt:
  Changed tables to use t1,t2,...
mysql-test/t/rpl_replicate_do.test:
  Changed tables to use t1,t2,...

mysql-test/r/multi_update.result

@@ -150,4 +150,29 @@ n	n
 delete  t1,t2 from t2 left outer join t1  using (n);
 select * from t2 left outer join t1  using (n);
 n	n
-drop table if exists t1,t2 ;
+drop table t1,t2 ;
+create table t1 (n int(10) not null primary key, d int(10));
+create table t2 (n int(10) not null primary key, d int(10));
+insert into t1 values(1,1);
+insert into t2 values(1,10),(2,20);
+LOCK TABLES t1 write, t2 read;
+DELETE t1.*, t2.* FROM t1,t2 where t1.n=t2.n;
+Table 't2' was locked with a READ lock and can't be updated
+UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
+Table 't2' was locked with a READ lock and can't be updated
+UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
+Table 't2' was locked with a READ lock and can't be updated
+unlock tables;
+LOCK TABLES t1 write, t2 write;
+UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
+select * from t1;
+n	d
+1	10
+DELETE t1.*, t2.* FROM t1,t2 where t1.n=t2.n;
+select * from t1;
+n	d
+select * from t2;
+n	d
+2	20
+unlock tables;
+drop table t1,t2;

mysql-test/r/rpl000007.result

@@ -1,20 +0,0 @@
-slave stop;
-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;
-slave start;
-drop table if exists foo;
-create table foo (n int);
-insert into foo values(4);
-drop table if exists foo;
-create table foo (s char(20));
-load data infile '../../std_data/words.dat' into table foo;
-insert into foo values('five');
-drop table if exists bar;
-create table bar (m int);
-insert into bar values(15);
-select foo.n,bar.m from foo,bar;
-n	m
-4	15
-drop table if exists bar,foo;

mysql-test/r/rpl_replicate_do.result

@@ -0,0 +1,28 @@
+slave stop;
+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;
+slave start;
+drop table if exists t11;
+drop table if exists t11;
+create table t2 (n int);
+insert into t2 values(4);
+create table t2 (s char(20));
+load data infile '../../std_data/words.dat' into table t2;
+insert into t2 values('five');
+create table t1 (m int);
+insert into t1 values(15),(16),(17);
+update t1 set m=20 where m=16;
+delete from t1 where m=17;
+create table t11 select * from t1;
+select * from t1;
+m
+15
+20
+select * from t2;
+n
+4
+select * from t11;
+Table 'test.t11' doesn't exist
+drop table if exists t1,t2,t3,t11;

mysql-test/r/rpl_rotate_logs.result

@@ -1,3 +1,5 @@
+drop table if exists t1, t2, t3, t4;
+drop table if exists t1, t2, t3, t4;
 slave start;
 Could not initialize master info structure, check permisions on master.info
 slave start;
@@ -8,7 +10,6 @@ reset slave;
 change master to master_host='127.0.0.1',master_port=MASTER_PORT, master_user='root';
 reset master;
 slave start;
-drop table if exists t1, t2, t3, t4;
 create temporary table temp_table (a char(80) not null);
 insert into temp_table values ("testing temporary tables");
 create table t1 (s text);