readbtreecursorlocks.subsql

derby database source code.good for you.

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;
commit;

--------------------------------------------------------------------------------
-- TEST 5: btree cursor scan, group fetch = 2 (scan with committed deleted rows)
-- Test full cursor scan on a data set with some deleted rows (the "even" ones).
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','2');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a';

call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;
commit;

--------------------------------------------------------------------------------
-- TEST 6: btree cursor scan, group fetch = 1 (scan with "<" qualifier)
-- Test "less than" qualified cursor scan on a data set.
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a where a < 3';
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;

--------------------------------------------------------------------------------
-- TEST 7: btree cursor scan, group fetch = 2 (scan with "<" qualifier)
-- Test "less than" qualified cursor scan on a data set.
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','2');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a where a < 3';
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;

--------------------------------------------------------------------------------
-- TEST 8: btree cursor scan, group fetch = 1 (scan with equals qualifier)
-- Test "equals" qualified cursor scan on a data set.
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a where a = 5';
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;

--------------------------------------------------------------------------------
-- TEST 9: btree cursor scan, group fetch = 2 (scan with equals qualifier)
-- Test "equals" qualified cursor scan on a data set.
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','2');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a where a = 5 or a = 7';
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;

--------------------------------------------------------------------------------
-- TEST 10: btree cursor scan, group fetch = 1 (equals qualifier, no rows return)
-- Test "equals" qualified cursor scan on a data set, no rows returned.
--    ALL MODES        - TABLE IS, "scan page lockname of form (pageno, 1) 
--    SERIALIZABLE     - row S locks as it visits each row, held until end xact
--    REPEATABLE READ  - row S locks as it visits each row, held until end xact
--    READ COMMITTED   - row S lock on current row, released on move to next row
--    READ UNCOMMITTED - no row locks.
--
-- At this point the base table should look like:
-- 1, 10, 'one'
-- 3, 30, 'three'
-- 5, 50, 'five'
-- 7, 70, 'seven'
--------------------------------------------------------------------------------

-- no rows expected to qualify
CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');

-- RESOLVE: missing row locks
-- WORKAROUND: creating an index and dropping it 
-- to force the statement to be recompiled
create index ix1 on a(a);
drop index ix1;
commit;

get cursor scan_cursor as
    'select a from a where a = 42';
call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');

select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

next scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

close scan_cursor;
select * from lock_table order by tabname, type desc, mode, cnt, lockname;

commit;

drop table a;