This is a large push. Included are :

* multi-table updates
* new paid feature for limiting number of queries per hour for users
* optional syntax for multi-table deletes
* optimization for SQL_CALC_FOUND_ROWS
* a small addition for CREATE .. SELECT that will be of future use

I know that all this will require many additions to documentation, 
which I have not done, but I am at Arjen's disposal to help him document
all this.



libmysqld/lib_sql.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
mysql-test/r/multi_update.result:
  Change of the result to accomodate multi-table updates
mysql-test/t/multi_update.test:
  Change in multi-table tests to accomodate multi-table updates
BitKeeper/etc/ignore:
  Added 50 sql/new.cc to the ignore list
scripts/mysql_install_db.sh:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/item_timefunc.h:
  This is a small feature that will be of use later in the proper 
  creation of the tables out of CREATE ... SELECT...
  
  Further changes will come after this resolve/push/test passes ..
sql/lex.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/mysql_priv.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/mysqld.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_acl.cc:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_acl.h:
  This is a small change required due to new paid feature of limiting 
  number of queries per hour for each user.
sql/sql_class.h:
  These are changes required for multi-table updates.
sql/sql_lex.h:
  Changes required for both multi-table updates and limiting number of 
  queries per hour (paid feature).
sql/sql_parse.cc:
  Ha ! So many changes. 
  
  * multi-table updates
  * limiting number of queries per hour for users
sql/sql_select.cc:
  Optimisation for SQL_CALC_FOUND_ROWS, when a query involves a single
  table, without WHERE or GROUP clause
sql/sql_update.cc:
  multi-table updates
sql/sql_yacc.yy:
  Many things :
  * multi-table updates
  * limiting number of queries per hour for users
  * new optional syntax for multi-table deletes. This one is different 
    from the one demanded by user. USING clause MUST include ALL tables, 
    not just the ones that are used and not deleted from.

2 files changed, 23 insertions, 21 deletions

diff --git a/mysql-test/r/multi_update.result b/mysql-test/r/multi_update.result
index f8bc19dd065..b1423667c44 100644
--- a/mysql-test/r/multi_update.result
+++ b/mysql-test/r/multi_update.result
@@ -2,32 +2,33 @@ drop table if exists t1,t2,t3;
 create table t1(id1 int not null auto_increment primary key, t char(12));
 create table t2(id2 int not null, t char(12));
 create table t3(id3 int not null, t char(12), index(id3));
-delete t1.*, t2.*, t3.*  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 9500;
+update t1,t2,t3 set t1.t="aaa", t2.t="bbb", t3.t="cc" where  t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 90;
+delete t1.*, t2.*, t3.*  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 95;
 check table t1, t2, t3;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 test.t2	check	status	OK
 test.t3	check	status	OK
-select count(*) from t1 where id1 > 9500;
+select count(*) from t1 where id1 > 95;
 count(*)
 0
-select count(*) from t2 where id2 > 9500;
+select count(*) from t2 where id2 > 95;
 count(*)
 0
-select count(*) from t3 where id3 > 9500;
+select count(*) from t3 where id3 > 95;
 count(*)
 0
-delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 500;
-select count(*) from t1 where id1 > 500;
+delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 5;
+select count(*) from t1 where id1 > 5;
 count(*)
 0
-select count(*) from t2 where id2 > 500;
+select count(*) from t2 where id2 > 5;
 count(*)
 0
-select count(*) from t3 where id3 > 500;
+select count(*) from t3 where id3 > 5;
 count(*)
 0
-delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 0;
+delete from t1, t2, t3  using t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 0;
 select count(*) from t1 where id1;
 count(*)
 0
diff --git a/mysql-test/t/multi_update.test b/mysql-test/t/multi_update.test
index 0fc4d923469..11697f794a9 100644
--- a/mysql-test/t/multi_update.test
+++ b/mysql-test/t/multi_update.test
@@ -2,15 +2,15 @@
 # Only run the test if we are using --big-test, because this test takes a
 # long time
 #
--- require r/big_test.require
-eval select $BIG_TEST as using_big_test;
+#-- require r/big_test.require
+#eval select $BIG_TEST as using_big_test;
 
 drop table if exists t1,t2,t3;
 create table t1(id1 int not null auto_increment primary key, t char(12));
 create table t2(id2 int not null, t char(12));
 create table t3(id3 int not null, t char(12), index(id3));
 disable_query_log;
-let $1 = 10000;
+let $1 = 100;
 while ($1)
  {
   let $2 = 5;
@@ -29,20 +29,21 @@ while ($1)
   dec $1;
  }
 enable_query_log;
-delete t1.*, t2.*, t3.*  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 9500;
+update t1,t2,t3 set t1.t="aaa", t2.t="bbb", t3.t="cc" where  t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 90;
+delete t1.*, t2.*, t3.*  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 95;
 
 check table t1, t2, t3;
 
-select count(*) from t1 where id1 > 9500;
-select count(*) from t2 where id2 > 9500;
-select count(*) from t3 where id3 > 9500;
+select count(*) from t1 where id1 > 95;
+select count(*) from t2 where id2 > 95;
+select count(*) from t3 where id3 > 95;
 
-delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 500;
-select count(*) from t1 where id1 > 500;
-select count(*) from t2 where id2 > 500;
-select count(*) from t3 where id3 > 500;
+delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 5;
+select count(*) from t1 where id1 > 5;
+select count(*) from t2 where id2 > 5;
+select count(*) from t3 where id3 > 5;
 
-delete t1, t2, t3  from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 0;
+delete from t1, t2, t3  using t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3  and t1.id1 > 0;
 
 # These queries will force a scan of the table
 select count(*) from t1 where id1;