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71ce58a3b1
* 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.
41 lines
1.2 KiB
Text
41 lines
1.2 KiB
Text
drop table if exists t1,t2,t3;
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create table t1(id1 int not null auto_increment primary key, t char(12));
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create table t2(id2 int not null, t char(12));
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create table t3(id3 int not null, t char(12), index(id3));
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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;
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delete t1.*, t2.*, t3.* from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 95;
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check table t1, t2, t3;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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test.t2 check status OK
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test.t3 check status OK
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select count(*) from t1 where id1 > 95;
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count(*)
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0
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select count(*) from t2 where id2 > 95;
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count(*)
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0
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select count(*) from t3 where id3 > 95;
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count(*)
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0
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delete t1, t2, t3 from t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 5;
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select count(*) from t1 where id1 > 5;
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count(*)
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0
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select count(*) from t2 where id2 > 5;
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count(*)
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0
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select count(*) from t3 where id3 > 5;
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count(*)
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0
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delete from t1, t2, t3 using t1,t2,t3 where t1.id1 = t2.id2 and t2.id2 = t3.id3 and t1.id1 > 0;
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select count(*) from t1 where id1;
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count(*)
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0
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select count(*) from t2 where id2;
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count(*)
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0
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select count(*) from t3 where id3;
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count(*)
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0
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drop table t1,t2,t3;
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