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thread1:
dml ; SELECT SLEEP (10) ;
query:
select | select | select | select | select |
select | select | select | select | select |
select | select | select | select | select |
dml | dml | dml | dml | dml |
transaction ;
dml:
update | insert | delete ;
select:
SELECT select_item FROM join where order_by limit;
select_item:
* | X . _field ;
join:
_table AS X |
_big_table AS X LEFT JOIN _small_table AS Y USING ( _field ) ;
where:
|
WHERE X . _field < value |
WHERE X . _field > value |
WHERE X . _field = value ;
where_delete:
|
WHERE _field < value |
WHERE _field > value |
WHERE _field = value ;
order_by:
ORDER BY X . _field ;
delete_order_by:
ORDER BY _field ;
limit:
LIMIT digit ;
insert:
INSERT INTO _table ( _field , _field ) VALUES ( value , value ) ;
update:
UPDATE _table AS X SET _field = value where order_by limit ;
delete:
DELETE FROM _table where_delete delete_order_by LIMIT digit ;
transaction: START TRANSACTION | COMMIT | ROLLBACK ;
alter:
ALTER TABLE _table DROP KEY letter |
ALTER TABLE _table DROP KEY _field |
ALTER TABLE _table ADD KEY letter ( _field ) ;
value:
' letter ' | digit | _date | _datetime | _time ;
# Use only medimum - sized tables for this test
_table:
C | D | E ;
_big_table:
C | D | E ;
_small_table:
A | B | C ;
# Use only indexed fields:
_field:
`int_key` | `date_key` | `datetime_key` | `varchar_key` ;
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