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|
ij(CONNECTION1)> --
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
--------------------------------------------------------------------------------
-- Test multi user lock interaction under isolation level 2. default isolation
-- level has been set as a property to serializable.
--------------------------------------------------------------------------------
run resource '/org/apache/derbyTesting/functionTests/tests/store/createTestProcedures.subsql';
ij(CONNECTION1)> --
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
CREATE FUNCTION PADSTRING (DATA VARCHAR(32000), LENGTH INTEGER) RETURNS VARCHAR(32000) EXTERNAL NAME 'org.apache.derbyTesting.functionTests.util.Formatters.padString' LANGUAGE JAVA PARAMETER STYLE JAVA;
0 rows inserted/updated/deleted
ij(CONNECTION1)> CREATE PROCEDURE WAIT_FOR_POST_COMMIT() DYNAMIC RESULT SETS 0 LANGUAGE JAVA EXTERNAL NAME 'org.apache.derbyTesting.functionTests.util.T_Access.waitForPostCommitToFinish' PARAMETER STYLE JAVA;
0 rows inserted/updated/deleted
ij(CONNECTION1)> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.storage.pageSize', '4096');
0 rows inserted/updated/deleted
ij(CONNECTION1)> autocommit off;
ij(CONNECTION1)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(CONNECTION1)> --------------------------------------------------------------------------------
-- Test 0: verify isolation level by seeing if a read lock is released or not.
--------------------------------------------------------------------------------
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> connect 'wombat' as writer;
ij(WRITER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(WRITER)> -- set up
set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> create table test_0 (a int);
0 rows inserted/updated/deleted
ij(SCANNER)> insert into test_0 values (1);
1 row inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> set connection writer;
ij(WRITER)> autocommit off;
ij(WRITER)> -- isolation 2 scanner should release read lock on table after statement.
set connection scanner;
ij(SCANNER)> select * from test_0;
A
-----------
1
ij(SCANNER)> -- writer should be able to insert into table - scanner released read lock.
set connection writer;
ij(WRITER)> insert into test_0 values (2);
1 row inserted/updated/deleted
ij(WRITER)> -- scanner will now block on uncommitted insert, and get lock timeout
set connection scanner;
ij(SCANNER)> select * from test_0;
A
-----------
ERROR 40XL1: A lock could not be obtained within the time requested
ij(SCANNER)> commit;
ij(SCANNER)> -- commit writer - releasing all locks.
set connection writer;
ij(WRITER)> commit;
ij(WRITER)> -- scanner will now see 2 rows
set connection scanner;
ij(SCANNER)> select * from test_0;
A
-----------
1
2
ij(SCANNER)> commit;
ij(SCANNER)> -- cleanup
set connection scanner;
ij(SCANNER)> drop table test_0;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> set connection writer;
ij(WRITER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 1: make sure a leaf root growing get's the right lock.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Test setup - create a 1 page btree, with the page ready to split.
--------------------------------------------------------------------------------
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> connect 'wombat' as rootgrower;
ij(ROOTGROWER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(ROOTGROWER)> set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> create table a (a varchar(1200), b varchar(1000)) ;
0 rows inserted/updated/deleted
ij(SCANNER)> insert into a values (PADSTRING('a',1200), PADSTRING('a',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into a values (PADSTRING('b',1200), PADSTRING('b',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into a values (PADSTRING('c',1200), PADSTRING('c',1000));
1 row inserted/updated/deleted
ij(SCANNER)> create index a_idx on a (a) ;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> set connection rootgrower;
ij(ROOTGROWER)> autocommit off;
ij(ROOTGROWER)> commit;
ij(ROOTGROWER)> --------------------------------------------------------------------------------
-- Set up scanner to be doing a row locked covered scan on the index.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');
0 rows inserted/updated/deleted
ij(SCANNER)> get cursor scan_cursor as
'select a from a where a >= PADSTRING(''a'',1200) and a < PADSTRING(''c'',1200) ';
ij(SCANNER)> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');
0 rows inserted/updated/deleted
ij(SCANNER)> next scan_cursor;
A
--------------------------------------------------------------------------------------------------------------------------------
a &
ij(SCANNER)> --------------------------------------------------------------------------------
-- Before DERBY-2991 the attempt to split the root would time out because the
-- scan had locked the first page.
--------------------------------------------------------------------------------
set connection rootgrower;
ij(ROOTGROWER)> autocommit off;
ij(ROOTGROWER)> insert into a values (PADSTRING('d',1200), PADSTRING('d',1000));
1 row inserted/updated/deleted
ij(ROOTGROWER)> rollback;
ij(ROOTGROWER)> --------------------------------------------------------------------------------
-- The scan should continue unaffected.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> next scan_cursor;
A
--------------------------------------------------------------------------------------------------------------------------------
b &
ij(SCANNER)> next scan_cursor;
No current row
ij(SCANNER)> --------------------------------------------------------------------------------
-- This insert will block on the previous key lock of the scanner.
--------------------------------------------------------------------------------
set connection rootgrower;
ij(ROOTGROWER)> insert into a values (PADSTRING('ab',1200), PADSTRING('ab',1000));
1 row inserted/updated/deleted
ij(ROOTGROWER)> --------------------------------------------------------------------------------
-- Now the grow root should be allowed (note that cursor scan has locks
-- on the leaf page being grown - just not the scan lock).
-- (Scan locks are no longer used after DERBY-2991.)
--------------------------------------------------------------------------------
set connection rootgrower;
ij(ROOTGROWER)> insert into a values (PADSTRING('d',1200), PADSTRING('d',1000));
1 row inserted/updated/deleted
ij(ROOTGROWER)> select a from a;
A
--------------------------------------------------------------------------------------------------------------------------------
a &
ab &
b &
c &
d &
ij(ROOTGROWER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection rootgrower;
ij(ROOTGROWER)> commit;
ij(ROOTGROWER)> disconnect;
ij> set connection scanner;
ij(SCANNER)> commit;
ij(SCANNER)> drop table a;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 2: make sure previous key locks are gotten correctly.
--------------------------------------------------------------------------------
connect 'wombat' as client_1;
ij(CLIENT_1)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(CLIENT_1)> connect 'wombat' as client_2;
ij(CLIENT_2)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(CLIENT_2)> set connection client_1;
ij(CLIENT_1)> autocommit off;
ij(CLIENT_1)> create table a (a varchar(1000), b varchar(1000)) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create unique index a_idx on a (a) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> insert into a values (PADSTRING('b',1000), PADSTRING('b',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into a values (PADSTRING('c',1000), PADSTRING('c',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into a values (PADSTRING('e',1000), PADSTRING('e',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into a values (PADSTRING('f',1000), PADSTRING('f',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into a values (PADSTRING('g',1000), PADSTRING('g',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> autocommit off;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- client 1 will get exclusive locks on 'c'.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> update a set b = 'new value' where a > 'b' and a <= 'd';
1 row inserted/updated/deleted
ij(CLIENT_1)> -- run resource '/org/apache/derbyTesting/functionTests/tests/store/LockTableQuery.subsql';
set connection client_2;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- the following will not time out, the insert
-- will get a previous key insert lock which will not conflict with the
-- non-insert read-committed exclusive lock on 'c'.
--------------------------------------------------------------------------------
insert into a values (PADSTRING('d',1000), PADSTRING('d',1000));
1 row inserted/updated/deleted
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- the following should NOT cause a time out
--------------------------------------------------------------------------------
insert into a values (PADSTRING('a',1000), PADSTRING('a',1000));
1 row inserted/updated/deleted
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- the following will block because it is a unique index, and the insert is of
-- the same row being locked by client_1
--------------------------------------------------------------------------------
insert into a values (PADSTRING('c',1000), PADSTRING('c',1000));
ERROR 40XL1: A lock could not be obtained within the time requested
ij(CLIENT_2)> -- run resource '/org/apache/derbyTesting/functionTests/tests/store/LockTableQuery.subsql';
--------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> select * from a;
A |B
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
b &|b &
c &|new value
e &|e &
f &|f &
g &|g &
ij(CLIENT_1)> commit;
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> commit;
ij(CLIENT_2)> select * from a;
A |B
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
b &|b &
c &|new value
e &|e &
f &|f &
g &|g &
ij(CLIENT_2)> drop table a;
0 rows inserted/updated/deleted
ij(CLIENT_2)> commit;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- Test 3: make sure an exact key insert into unique key index blocks.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> autocommit off;
ij(CLIENT_1)> create table a (a varchar(1000), b varchar(1000)) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create unique index a_idx on a (a) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> insert into a values (PADSTRING('b',1000), PADSTRING('b',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> autocommit off;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- the following should cause a time out, as the previous
-- key lock will conflict with client_1's lock on 'b'
--------------------------------------------------------------------------------
insert into a values (PADSTRING('b',1000), PADSTRING('b',1000));
ERROR 40XL1: A lock could not be obtained within the time requested
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- Test 4: make sure that row lock wait in a heap scan works
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> autocommit off;
ij(CLIENT_1)> create table test_4 (a int, b varchar(1000), c varchar(1000)) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> autocommit off;
ij(CLIENT_2)> commit;
ij(CLIENT_2)> -- client_1 will get a single row lock in the heap.
set connection client_1;
ij(CLIENT_1)> insert into test_4 values (1, PADSTRING('a',1000), PADSTRING('b',1000));
1 row inserted/updated/deleted
ij(CLIENT_1)> -- client_2 scans table, blocking on a row lock on the client_1 insert row,
-- will get timeout message.
set connection client_2;
ij(CLIENT_2)> select * from test_4;
A |B |C
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ERROR 40XL1: A lock could not be obtained within the time requested
ij(CLIENT_2)> -- release the insert lock.
set connection client_1;
ij(CLIENT_1)> commit;
ij(CLIENT_1)> -- reader should be able to see row now.
set connection client_2;
ij(CLIENT_2)> select * from test_4;
A |B |C
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 |a &|b &
ij(CLIENT_2)> commit;
ij(CLIENT_2)> -- cleanup
set connection client_1;
ij(CLIENT_1)> drop table test_4;
0 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- Test 5: make sure a that a group fetch through a secondary index correctly
-- handles a row that is deleted after it has read a row from the index
-- but before it has read the row from the base table.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- Test setup - create a 1 page btre, with the page ready to split.
--------------------------------------------------------------------------------
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> connect 'wombat' as deleter;
ij(DELETER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(DELETER)> set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> create table test_5 (a int, a2 int, b varchar(1000), c varchar(1000)) ;
0 rows inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (1, 10, PADSTRING('a',1000), PADSTRING('a',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (2, 20, PADSTRING('b',1000), PADSTRING('b',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (3, 30, PADSTRING('c',1000), PADSTRING('c',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (4, 40, PADSTRING('d',1000), PADSTRING('d',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (5, 50, PADSTRING('e',1000), PADSTRING('e',1000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_5 values (6, 60, PADSTRING('f',1000), PADSTRING('f',1000));
1 row inserted/updated/deleted
ij(SCANNER)> create index test_5_idx on test_5 (a);
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> set connection deleter;
ij(DELETER)> autocommit off;
ij(DELETER)> commit;
ij(DELETER)> --------------------------------------------------------------------------------
-- Set up scanner to be doing a row locked index to base row scan on the index.
-- By using group fetch it will read and release locks on multiple rows from
-- the index and save away row pointers from the index.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','10');
0 rows inserted/updated/deleted
ij(SCANNER)> get cursor scan_cursor as
'select a, a2 from test_5 where a > 1 ';
ij(SCANNER)> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');
0 rows inserted/updated/deleted
ij(SCANNER)> -- because of group locking will get locks on 1, 2, 3, 4, and 5 and then will
-- release the locks on 1, 2, 3, and 4. The last one is released on close or
-- on next call emptying the cursor.
next scan_cursor;
A |A2
-----------------------
2 |20
ij(SCANNER)> --------------------------------------------------------------------------------
-- Delete a row that the scanner has looked at but not reported back to the
-- caller.
--------------------------------------------------------------------------------
set connection deleter;
ij(DELETER)> delete from test_5 where a = 4;
1 row inserted/updated/deleted
ij(DELETER)> --------------------------------------------------------------------------------
-- The scan will requalify rows when it goes to the base table, thus it will
-- see 3, but block when it gets to the key of deleted row (4).
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
3 |30
ij(SCANNER)> next scan_cursor;
ERROR 40XL1: A lock could not be obtained within the time requested
ij(SCANNER)> -- commit the delete
set connection deleter;
ij(DELETER)> commit;
ij(DELETER)> -- scanner should see 1,2,3,4,6
set connection scanner;
ij(SCANNER)> close scan_cursor;
ij(SCANNER)> select a,b from test_5;
A |B
--------------------------------------------------------------------------------------------------------------------------------------------
1 |a &
2 |b &
3 |c &
5 |e &
6 |f &
ij(SCANNER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection deleter;
ij(DELETER)> commit;
ij(DELETER)> disconnect;
ij> set connection scanner;
ij(SCANNER)> commit;
ij(SCANNER)> drop table test_5;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 6: make sure a that heap scans which cross page boundaries release
-- locks correctly.
--------------------------------------------------------------------------------
-- Test setup - create a heap with one row per page.
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> connect 'wombat' as deleter;
ij(DELETER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(DELETER)> set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> create table test_6 (a int, a2 int, b varchar(2000), c varchar(2000)) ;
0 rows inserted/updated/deleted
ij(SCANNER)> insert into test_6 values (1, 10, PADSTRING('a',2000), PADSTRING('a',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_6 values (2, 20, PADSTRING('b',2000), PADSTRING('b',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_6 values (3, 30, PADSTRING('c',2000), PADSTRING('c',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_6 values (4, 40, PADSTRING('d',2000), PADSTRING('d',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_6 values (5, 50, PADSTRING('e',2000), PADSTRING('e',2000));
1 row inserted/updated/deleted
ij(SCANNER)> create index test_6_idx on test_6 (a);
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> set connection deleter;
ij(DELETER)> autocommit off;
ij(DELETER)> commit;
ij(DELETER)> --------------------------------------------------------------------------------
-- Set up scanner to be doing a row locked index to base row scan on the index.
-- By using group fetch it will read and release locks on multiple rows from
-- the index and save away row pointers from the index.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> get cursor scan_cursor as
'select a, a2 from test_6';
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
1 |10
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
2 |20
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
3 |30
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
4 |40
ij(SCANNER)> next scan_cursor;
A |A2
-----------------------
5 |50
ij(SCANNER)> --------------------------------------------------------------------------------
-- Delete all rows that the scanner has looked at, and should have released the
-- lock on.
--------------------------------------------------------------------------------
set connection deleter;
ij(DELETER)> delete from test_6 where a = 1;
1 row inserted/updated/deleted
ij(DELETER)> delete from test_6 where a = 2;
1 row inserted/updated/deleted
ij(DELETER)> delete from test_6 where a = 3;
1 row inserted/updated/deleted
ij(DELETER)> delete from test_6 where a = 4;
1 row inserted/updated/deleted
ij(DELETER)> --------------------------------------------------------------------------------
-- The scan should either block on the delete or continue and not return the
-- the deleted row.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> next scan_cursor;
No current row
ij(SCANNER)> close scan_cursor;
ij(SCANNER)> -- commit the delete
set connection deleter;
ij(DELETER)> delete from test_6 where a = 5;
1 row inserted/updated/deleted
ij(DELETER)> commit;
ij(DELETER)> -- scanner should see no rows.
set connection scanner;
ij(SCANNER)> select a,b from test_6;
A |B
--------------------------------------------------------------------------------------------------------------------------------------------
ij(SCANNER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection deleter;
ij(DELETER)> commit;
ij(DELETER)> disconnect;
ij> set connection scanner;
ij(SCANNER)> commit;
ij(SCANNER)> drop table test_6;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 7: make sure that 2 heap cursor scans in same transaction work (at one
-- point there was a problem where releasing locks in one of the cursors
-- released locks in the other cursor).
--------------------------------------------------------------------------------
-- Test setup - create a heap with one row per page.
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> connect 'wombat' as deleter;
ij(DELETER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(DELETER)> --------------------------------------------------------------------------------
-- HEAP SCAN
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> autocommit off;
ij(SCANNER)> create table test_7 (a int, a2 int, b varchar(2000), c varchar(2000)) ;
0 rows inserted/updated/deleted
ij(SCANNER)> insert into test_7 values (1, 10, PADSTRING('a',2000), PADSTRING('a',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_7 values (2, 20, PADSTRING('b',2000), PADSTRING('b',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_7 values (3, 30, PADSTRING('c',2000), PADSTRING('c',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_7 values (4, 40, PADSTRING('d',2000), PADSTRING('d',2000));
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_7 values (5, 50, PADSTRING('e',2000), PADSTRING('e',2000));
1 row inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> set connection deleter;
ij(DELETER)> autocommit off;
ij(DELETER)> commit;
ij(DELETER)> -- Set up scanner to be doing a row locked heap scan, going one row at a time.
set connection scanner;
ij(SCANNER)> CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');
0 rows inserted/updated/deleted
ij(SCANNER)> get cursor scan_cursor_1 as
'select a, a2 from test_7';
ij(SCANNER)> get cursor scan_cursor_2 as
'select a, a2 from test_7';
ij(SCANNER)> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');
0 rows inserted/updated/deleted
ij(SCANNER)> next scan_cursor_1;
A |A2
-----------------------
1 |10
ij(SCANNER)> next scan_cursor_1;
A |A2
-----------------------
2 |20
ij(SCANNER)> next scan_cursor_1;
A |A2
-----------------------
3 |30
ij(SCANNER)> next scan_cursor_1;
A |A2
-----------------------
4 |40
ij(SCANNER)> next scan_cursor_1;
A |A2
-----------------------
5 |50
ij(SCANNER)> next scan_cursor_2;
A |A2
-----------------------
1 |10
ij(SCANNER)> close scan_cursor_2;
ij(SCANNER)> -- Get exclusive table lock on test_7. Should fail with table cannot be locked.
set connection deleter;
ij(DELETER)> lock table test_7 in exclusive mode;
ERROR X0X02: Table 'TEST_7' cannot be locked in 'EXCLUSIVE' mode.
ERROR 40XL1: A lock could not be obtained within the time requested
ij(DELETER)> -- release all read locks, by moving the cursor past all the rows.
set connection scanner;
ij(SCANNER)> next scan_cursor_1;
No current row
ij(SCANNER)> close scan_cursor_1;
ij(SCANNER)> -- Get exclusive table lock on test_7. Now that both scan closed this should
-- work.
set connection deleter;
ij(DELETER)> delete from test_7;
5 rows inserted/updated/deleted
ij(DELETER)> commit;
ij(DELETER)> -- scanner should see no rows.
set connection scanner;
ij(SCANNER)> select a,b from test_7;
A |B
--------------------------------------------------------------------------------------------------------------------------------------------
ij(SCANNER)> commit;
ij(SCANNER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection deleter;
ij(DELETER)> commit;
ij(DELETER)> disconnect;
ij> set connection scanner;
ij(SCANNER)> commit;
ij(SCANNER)> drop table test_7;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 8: Exercise post commit cases, force the code through the path, no easy
-- way to make sure the post commit work is actually doing something.
-- All these case were run with lock debugging by hand to make sure the
-- right thing was happening:
--
-- 8.1 - heap post commit successfully gets table X lock and cleans up.
-- 8.2 - heap post commit can't get table X lock, so gives up and let's
-- client continue on with work.
-- 8.3 - btree post commit successfully gets table X lock and cleans up.
-- 8.4 - btree post commit can't get table X lock, so gives up and let's
-- client continue on with work.
-- client continue on with work.
--
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- 8.1 setup
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> create table test_8 (a int, a2 int, b varchar(2000), c char(10))
;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create index test_8_idx on test_8 (a);
0 rows inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (1, 10, PADSTRING('a',2000), 'test 8.1');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (2, 20, PADSTRING('b',2000), 'test 8.1');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (3, 30, PADSTRING('c',2000), 'test 8.1');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (4, 40, PADSTRING('d',2000), 'test 8.1');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (5, 50, PADSTRING('e',2000), 'test 8.1');
1 row inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- 8.1 test - simply delete rows from table, heap post commit will run and
-- reclaim all pages.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> delete from test_8;
5 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> select a from test_8;
A
-----------
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- 8.2 setup
--------------------------------------------------------------------------------
drop table test_8;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create table test_8 (a int, a2 int, b varchar(1000), c char(10))
;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create index test_8_idx on test_8 (a);
0 rows inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (1, 10, PADSTRING('a',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (2, 20, PADSTRING('b',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (3, 30, PADSTRING('c',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (4, 40, PADSTRING('d',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (5, 50, PADSTRING('e',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- 8.2 test - client 1 holds row lock which will prevent client 2 post commit.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> insert into test_8 values (6, 60, PADSTRING('a',1000), 'test 8.2');
1 row inserted/updated/deleted
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> delete from test_8 where a < 5;
4 rows inserted/updated/deleted
ij(CLIENT_2)> commit;
ij(CLIENT_2)> set connection client_1;
ij(CLIENT_1)> select a from test_8;
A
-----------
5
6
ij(CLIENT_1)> commit;
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> select a from test_8;
A
-----------
5
6
ij(CLIENT_2)> commit;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- 8.3 setup
--------------------------------------------------------------------------------
drop table test_8;
0 rows inserted/updated/deleted
ij(CLIENT_2)> create table test_8 (a int, a2 int, b varchar(1500), c char(10));
0 rows inserted/updated/deleted
ij(CLIENT_2)> create index test_8_idx on test_8 (a, b)
;
0 rows inserted/updated/deleted
ij(CLIENT_2)> insert into test_8 values (1, 10, PADSTRING('a',1500), 'test 8.3');
1 row inserted/updated/deleted
ij(CLIENT_2)> insert into test_8 values (2, 20, PADSTRING('b',1500), 'test 8.3');
1 row inserted/updated/deleted
ij(CLIENT_2)> insert into test_8 values (3, 30, PADSTRING('c',1500), 'test 8.3');
1 row inserted/updated/deleted
ij(CLIENT_2)> insert into test_8 values (4, 40, PADSTRING('d',1500), 'test 8.3');
1 row inserted/updated/deleted
ij(CLIENT_2)> insert into test_8 values (5, 50, PADSTRING('e',1500), 'test 8.3');
1 row inserted/updated/deleted
ij(CLIENT_2)> commit;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- 8.3 test - simply delete rows from index table, btree post commit will run
-- and reclaim all pages.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> delete from test_8;
5 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> select a from test_8;
A
-----------
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- 8.4 setup
--------------------------------------------------------------------------------
drop table test_8;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create table test_8 (a int, a2 int, b varchar(1500), c char(10)) ;
0 rows inserted/updated/deleted
ij(CLIENT_1)> create index test_8_idx1 on test_8 (a);
0 rows inserted/updated/deleted
ij(CLIENT_1)> create index test_8_idx2 on test_8 (a, b)
;
0 rows inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (1, 10, PADSTRING('a',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (2, 20, PADSTRING('b',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (3, 30, PADSTRING('c',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (4, 40, PADSTRING('d',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> insert into test_8 values (5, 50, PADSTRING('e',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> --------------------------------------------------------------------------------
-- 8.4 test - client 1 holds row lock which will prevent client 2 post commit.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> insert into test_8 values (6, 60, PADSTRING('a',1500), 'test 8.4');
1 row inserted/updated/deleted
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> delete from test_8 where a < 5;
4 rows inserted/updated/deleted
ij(CLIENT_2)> commit;
ij(CLIENT_2)> set connection client_1;
ij(CLIENT_1)> select a from test_8;
A
-----------
5
6
ij(CLIENT_1)> commit;
ij(CLIENT_1)> set connection client_2;
ij(CLIENT_2)> select a from test_8;
A
-----------
5
6
ij(CLIENT_2)> commit;
ij(CLIENT_2)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection client_1;
ij(CLIENT_1)> drop table test_8;
0 rows inserted/updated/deleted
ij(CLIENT_1)> commit;
ij(CLIENT_1)> disconnect;
ij> set connection client_2;
ij(CLIENT_2)> commit;
ij(CLIENT_2)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 9: Make sure scan positioning in the beginning of a unique scan
-- properly gets the scan lock to block with splits.
-- (Scan locks are no longer used after DERBY-2991.)
--
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- 9.1 setup
--------------------------------------------------------------------------------
connect 'wombat' as scanner;
ij(SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SCANNER)> autocommit off;
ij(SCANNER)> commit;
ij(SCANNER)> connect 'wombat' as splitter;
ij(SPLITTER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(SPLITTER)> autocommit off;
ij(SPLITTER)> commit;
ij(SPLITTER)> set connection scanner;
ij(SCANNER)> create table test_9 (a int, a2 int, b varchar(1000), c char(10))
;
0 rows inserted/updated/deleted
ij(SCANNER)> insert into test_9 values (5, 50, PADSTRING('e',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_9 values (4, 40, PADSTRING('d',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_9 values (3, 30, PADSTRING('c',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_9 values (2, 20, PADSTRING('b',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SCANNER)> insert into test_9 values (1, 10, PADSTRING('a',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SCANNER)> create unique index test_9_idx on test_9 (b) ;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> --------------------------------------------------------------------------------
-- 9.1 test - open a cursor for update on table, and make sure splitter waits
-- on the scan position.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault','1');
0 rows inserted/updated/deleted
ij(SCANNER)> get cursor scan_cursor as
'select b from test_9 where b >= ''a'' ';
ij(SCANNER)> call SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.language.bulkFetchDefault', '16');
0 rows inserted/updated/deleted
ij(SCANNER)> next scan_cursor;
B
--------------------------------------------------------------------------------------------------------------------------------
b &
ij(SCANNER)> next scan_cursor;
B
--------------------------------------------------------------------------------------------------------------------------------
c &
ij(SCANNER)> -- the following will get a couple of rows and then block on the split.
set connection splitter;
ij(SPLITTER)> insert into test_9 values (0, 10, PADSTRING('aa',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SPLITTER)> commit;
ij(SPLITTER)> insert into test_9 values (0, 10, PADSTRING('ab',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SPLITTER)> commit;
ij(SPLITTER)> -- insert ahead in the cursor to make sure we pick it up later.
-- This would time out before DERBY-2991.
insert into test_9 values (0, 10, PADSTRING('dd',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(SPLITTER)> rollback;
ij(SPLITTER)> set connection scanner;
ij(SCANNER)> next scan_cursor;
B
--------------------------------------------------------------------------------------------------------------------------------
d &
ij(SCANNER)> next scan_cursor;
B
--------------------------------------------------------------------------------------------------------------------------------
e &
ij(SCANNER)> next scan_cursor;
No current row
ij(SCANNER)> next scan_cursor;
No current row
ij(SCANNER)> commit;
ij(SCANNER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection scanner;
ij(SCANNER)> drop table test_9;
0 rows inserted/updated/deleted
ij(SCANNER)> commit;
ij(SCANNER)> disconnect;
ij> set connection splitter;
ij(SPLITTER)> commit;
ij(SPLITTER)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 10: Make sure a ddl does not block the lock table vti.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- 10 setup
--------------------------------------------------------------------------------
connect 'wombat' as ddl;
ij(DDL)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(DDL)> autocommit off;
ij(DDL)> commit;
ij(DDL)> connect 'wombat' as locktable;
ij(LOCKTABLE)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(LOCKTABLE)> autocommit off;
ij(LOCKTABLE)> commit;
ij(LOCKTABLE)> set connection ddl;
ij(DDL)> run resource '/org/apache/derbyTesting/functionTests/tests/store/LockTableQuery.subsql';
ij(DDL)> --
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements. See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
create view lock_table as
select
cast(username as char(8)) as username,
cast(t.type as char(15)) as trantype,
cast(l.type as char(8)) as type,
cast(lockcount as char(3)) as cnt,
mode,
cast(tablename as char(12)) as tabname,
cast(lockname as char(10)) as lockname,
state,
status
from
syscs_diag.lock_table l right outer join syscs_diag.transaction_table t
on l.xid = t.xid where l.tableType <> 'S' and t.type='UserTransaction';
0 rows inserted/updated/deleted
ij(DDL)> --on l.xid = t.xid where l.tableType <> 'S' or l.tableType is null
-- order by
-- tabname, type desc, mode, cnt, lockname
-- lock table with system catalog locks included.
create view full_lock_table as
select
cast(username as char(8)) as username,
cast(t.type as char(8)) as trantype,
cast(l.type as char(8)) as type,
cast(lockcount as char(3)) as cnt,
mode,
cast(tablename as char(12)) as tabname,
cast(lockname as char(10)) as lockname,
state,
status
from
syscs_diag.lock_table l right outer join syscs_diag.transaction_table t
on l.xid = t.xid where l.tableType <> 'S' ;
0 rows inserted/updated/deleted
ij(DDL)> -- lock table with no join.
-- DERBY-6183, removing CAST's to avoid background locks causing
-- data trunction warnings.
create view lock_table2 as
select
xid,
type,
lockcount as cnt,
mode,
tablename as tabname,
lockname,
state
from
syscs_diag.lock_table
where tableType <> 'S' ;
0 rows inserted/updated/deleted
ij(DDL)> -- transaction table with no join.
create view tran_table as
select
*
from
syscs_diag.transaction_table;
0 rows inserted/updated/deleted
ij(DDL)> commit;
ij(DDL)> --------------------------------------------------------------------------------
-- 10 test - do ddl in one connection and look at lock table in another
-- connection.
--------------------------------------------------------------------------------
set connection ddl;
ij(DDL)> create table test_10 (a int, a2 int, b varchar(1000), c char(10))
;
0 rows inserted/updated/deleted
ij(DDL)> insert into test_10 values (4, 40, PADSTRING('d',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(DDL)> insert into test_10 values (3, 30, PADSTRING('c',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(DDL)> insert into test_10 values (2, 20, PADSTRING('b',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(DDL)> insert into test_10 values (1, 10, PADSTRING('a',1000), 'test 9.1');
1 row inserted/updated/deleted
ij(DDL)> set connection locktable;
ij(LOCKTABLE)> -- this should not block on the other thread.
select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |4 |IX |TEST_10 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|TABLE |1 |X |TEST_10 |Tablelock |GRANT|ACTIVE
ij(LOCKTABLE)> commit;
ij(LOCKTABLE)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection ddl;
ij(DDL)> drop table test_10;
0 rows inserted/updated/deleted
ij(DDL)> commit;
ij(DDL)> disconnect;
ij> set connection locktable;
ij(LOCKTABLE)> commit;
ij(LOCKTABLE)> disconnect;
ij> --------------------------------------------------------------------------------
-- Test 11: test update locks
--------------------------------------------------------------------------------
connect 'wombat' as t11scanner;
ij(T11SCANNER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(T11SCANNER)> connect 'wombat' as t11updater;
ij(T11UPDATER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(T11UPDATER)> connect 'wombat' as t11writer;
ij(T11WRITER)> -- by default, holdability of ResultSet objects created using this Connection object is true. Following will set it to false for this connection.
NoHoldForConnection;
ij(T11WRITER)> -- set up
set connection t11updater;
ij(T11UPDATER)> autocommit off;
ij(T11UPDATER)> create table test_11 (a int, b int);
0 rows inserted/updated/deleted
ij(T11UPDATER)> insert into test_11 values (1,1);
1 row inserted/updated/deleted
ij(T11UPDATER)> insert into test_11 values (2,2);
1 row inserted/updated/deleted
ij(T11UPDATER)> insert into test_11 values (8,8);
1 row inserted/updated/deleted
ij(T11UPDATER)> create index test11_idx on test_11 (a);
0 rows inserted/updated/deleted
ij(T11UPDATER)> commit;
ij(T11UPDATER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
ij(T11UPDATER)> --
--==================================================
-- t11updater gets an update lock on row where a=1
--==================================================
get cursor update_cursor as
'select b from test_11 where a=1 for update of b';
ij(T11UPDATER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
ij(T11UPDATER)> next update_cursor;
B
-----------
1
ij(T11UPDATER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11UPDATER)> set connection t11scanner;
ij(T11SCANNER)> autocommit off;
ij(T11SCANNER)> --
--------------------------------------------------
-- try to scan the table, readers are compatible with update lock.
--------------------------------------------------
select * from test_11;
A |B
-----------------------
1 |1
2 |2
8 |8
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11SCANNER)> --
--------------------------------------------------
-- try to update the table, should timeout
--------------------------------------------------
update test_11 set b=99 where a = 1;
ERROR 40XL1: A lock could not be obtained within the time requested
ij(T11SCANNER)> --
--------------------------------------------------
-- try to update the table, should go through
--------------------------------------------------
update test_11 set b=99 where a = 8;
1 row inserted/updated/deleted
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|TABLE |2 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
APP |UserTransaction|ROW |3 |X |TEST_11 |(1,9) |GRANT|ACTIVE
ij(T11SCANNER)> commit;
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11SCANNER)> --
--------------------------------------------------
-- try to get an update lock
--------------------------------------------------
get cursor update_cursor2 as
'select b from test_11 where a=1 for update of b';
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11SCANNER)> --
--------------------------------------------------
-- should timeout (other transaction has a shared lock on this row)
--------------------------------------------------
next update_cursor2;
ERROR 40XL1: A lock could not be obtained within the time requested
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11SCANNER)> --
--------------------------------------------------
-- should succeed (no other transaction has a shared lock on this row)
--------------------------------------------------
get cursor update_cursor3 as
'select b from test_11 where a=8 for update of b';
ij(T11SCANNER)> select type, cnt, mode, tabname, lockname, state from lock_table2 order by tabname, type desc, mode, cnt, lockname;
TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TABLE|1 |IX |TEST_11 |Tablelock |GRANT
TABLE|1 |IX |TEST_11 |Tablelock |GRANT
ROW |1 |U |TEST_11 |(1,7) |GRANT
ij(T11SCANNER)> next update_cursor3;
B
-----------
99
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,9) |GRANT|ACTIVE
ij(T11SCANNER)> commit;
ij(T11SCANNER)> close update_cursor2;
ij(T11SCANNER)> close update_cursor3;
ij(T11SCANNER)> set connection t11updater;
ij(T11UPDATER)> commit;
ij(T11UPDATER)> close update_cursor;
ij(T11UPDATER)> set connection t11scanner;
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
ij(T11SCANNER)> --
--==================================================
-- t11scanner gets a read lock
--==================================================
select b from test_11 where a=1;
B
-----------
1
ij(T11SCANNER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
ij(T11SCANNER)> --
--------------------------------------------------
-- should succeed (can get an update lock if there is already a shared lock)
--------------------------------------------------
set connection t11updater;
ij(T11UPDATER)> get cursor update_cursor as
'select b from test_11 where a=1 for update of b';
ij(T11UPDATER)> next update_cursor;
B
-----------
1
ij(T11UPDATER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |1 |U |TEST_11 |(1,7) |GRANT|ACTIVE
ij(T11UPDATER)> commit;
ij(T11UPDATER)> close update_cursor;
ij(T11UPDATER)> set connection t11scanner;
ij(T11SCANNER)> commit;
ij(T11SCANNER)> --
--==================================================
-- t11writer gets a write lock
--==================================================
set connection t11writer;
ij(T11WRITER)> autocommit off;
ij(T11WRITER)> update test_11 set b=77 where a=2;
1 row inserted/updated/deleted
ij(T11WRITER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |2 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |3 |X |TEST_11 |(1,8) |GRANT|ACTIVE
ij(T11WRITER)> set connection t11updater;
ij(T11UPDATER)> get cursor update_cursor as
'select b from test_11 where a=2 for update of b';
ij(T11UPDATER)> select * from lock_table order by tabname, type desc, mode, cnt, lockname;
USERNAME|TRANTYPE |TYPE |CNT |MODE|TABNAME |LOCKNAME |STATE|STATUS
----------------------------------------------------------------------------------
APP |UserTransaction|TABLE |1 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|TABLE |2 |IX |TEST_11 |Tablelock |GRANT|ACTIVE
APP |UserTransaction|ROW |3 |X |TEST_11 |(1,8) |GRANT|ACTIVE
ij(T11UPDATER)> --
----------------------------------------------------
-- should timeout
----------------------------------------------------
next update_cursor;
ERROR 40XL1: A lock could not be obtained within the time requested
ij(T11UPDATER)> --------------------------------------------------------------------------------
-- cleanup.
--------------------------------------------------------------------------------
set connection t11updater;
ij(T11UPDATER)> close update_cursor;
ij(T11UPDATER)> drop table test_11;
ERROR 40XL1: A lock could not be obtained within the time requested
ij(T11UPDATER)> commit;
ij(T11UPDATER)> disconnect;
ij> set connection t11scanner;
ij(T11SCANNER)> disconnect;
ij> set connection t11writer;
ij(T11WRITER)> disconnect;
ij> exit;
|
