1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
|
ij> --
-- 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.
--
disconnect;
ij> xa_datasource 'wombat';
ij> ---------------------------------------------
-- a single connection and 1 phase commit
---------------------------------------------
xa_connect ;
ij> xa_start xa_noflags 0;
ij> xa_getconnection;
ij> drop table APP.foo;
ERROR 42Y55: 'DROP TABLE' cannot be performed on 'APP.FOO' because it does not exist.
ij> create table APP.foo (a int);
0 rows inserted/updated/deleted
ij> insert into APP.foo values (0);
1 row inserted/updated/deleted
ij> select * from APP.foo;
A
-----------
0
ij> run resource '/org/apache/derbyTesting/functionTests/tests/store/global_xactTable.view';
ij> --
-- 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 global_xactTable as
select
cast(global_xid as char(2)) as gxid,
status,
case when first_instant is NULL then 'NULL' else 'false' end as readOnly,
cast (username as char(10)) as username,
type
from syscs_diag.transaction_table;
0 rows inserted/updated/deleted
ij> select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(0 |ACTIVE |false|APP |UserTransaction
WARNING 01004: Data truncation
ij> xa_end xa_success 0;
ij> xa_commit xa_1phase 0;
ij> xa_datasource 'wombat' shutdown;
ERROR 08006: Database 'wombat' shutdown.
ij> ---------------------------------------------
-- 5 interleaving xa connections
---------------------------------------------
xa_datasource 'wombat';
ij> xa_connect user 'mamta' password 'mamta' ;
ij> -- global connection 1
xa_start xa_noflags 1;
ij> xa_getconnection;
ij> insert into APP.foo values (1);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 1;
ij> -- global connection 2
xa_start xa_noflags 2;
ij> insert into APP.foo values (2);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 2;
ij> -- global connection 3
xa_start xa_noflags 3;
ij> insert into APP.foo values (3);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 3;
ij> -- global connection 4
xa_start xa_noflags 4;
ij> insert into APP.foo values (4);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 4;
ij> -- global connection 5
xa_start xa_noflags 5;
ij> insert into APP.foo values (5);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 5;
ij> xa_start xa_resume 1;
ij> insert into APP.foo values (11);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 1;
ij> xa_start xa_resume 5;
ij> insert into APP.foo values (55);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 5;
ij> xa_start xa_resume 2;
ij> insert into APP.foo values (22);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 2;
ij> xa_start xa_resume 4;
ij> insert into APP.foo values (44);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 4;
ij> xa_start xa_resume 3;
ij> insert into APP.foo values (33);
1 row inserted/updated/deleted
ij> xa_end xa_suspend 3;
ij> -- prepare all the global connections except the first one. This way, we will see all
-- the global transactions prepared so far after the database shutdown and restart.
xa_end xa_success 2;
ij> xa_prepare 2;
ij> xa_end xa_success 3;
ij> xa_prepare 3;
ij> xa_end xa_success 4;
ij> xa_prepare 4;
ij> xa_end xa_success 5;
ij> xa_prepare 5;
ij> -- local connection 1
connect 'wombat' as local1;
ij(LOCAL1)> autocommit off;
ij(LOCAL1)> -- at this point, should see 4 global connections in the prepared mode and one global
-- connection in active mode and one local connection.
select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(1 |ACTIVE |false|MAMTA |UserTransaction
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
(2 |PREPARED|false|MAMTA |UserTransaction
(3 |PREPARED|false|MAMTA |UserTransaction
(4 |PREPARED|false|MAMTA |UserTransaction
(5 |PREPARED|false|MAMTA |UserTransaction
ij(LOCAL1)> select count(*) from syscs_diag.lock_table where mode = 'X' or mode = 'IX';
1
-----------
15
ij(LOCAL1)> xa_datasource 'wombat' shutdown;
ERROR 08006: Database 'wombat' shutdown.
ij(LOCAL1)> -- after shutdown and restart, should see only 4 prepared global connection from
-- earlier boot of the database. The local connections made during that time and
-- unprepared global connection will all rollback at the startup time and hence
-- we won't see them
xa_datasource 'wombat';
ij(LOCAL1)> xa_connect user 'mamta1' password 'mamta1';
ij(LOCAL1)> connect 'wombat' as local2;
ij(LOCAL2)> autocommit off;
ij(LOCAL2)> -- this will time out because there are locks on the table APP.foo from the global
-- transactions
select * from APP.foo;
A
-----------
ERROR 40XL1: A lock could not be obtained within the time requested
ij(LOCAL2)> -- should see 4 global transactions and a local connection
select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(2 |PREPARED|false|NULL |UserTransaction
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
(3 |PREPARED|false|NULL |UserTransaction
(4 |PREPARED|false|NULL |UserTransaction
(5 |PREPARED|false|NULL |UserTransaction
ij(LOCAL2)> -- rollback first global transactions 2 and 3 and commit the 3rd one.
xa_rollback 2;
ij(LOCAL2)> xa_rollback 3;
ij(LOCAL2)> xa_commit xa_2Phase 4;
ij(LOCAL2)> -- add couple more global transactions
xa_start xa_noflags 6;
ij(LOCAL2)> xa_getconnection;
ij(XA)> insert into APP.foo values (6);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 6;
ij(XA)> xa_start xa_noflags 7;
ij(XA)> insert into APP.foo values (7);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 7;
ij(XA)> xa_start xa_noflags 8;
ij(XA)> insert into APP.foo values (8);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 8;
ij(XA)> -- once a transaction is in prepare mode, can't resume it. Can only commit/rollback
-- so the following will give an error
xa_start xa_resume 5;
IJ ERROR: XAER_NOTA
ij(XA)> xa_start xa_resume 6;
ij(XA)> insert into APP.foo values (66);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 6;
ij(XA)> xa_start xa_resume 8;
ij(XA)> insert into APP.foo values (88);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 8;
ij(XA)> xa_start xa_resume 7;
ij(XA)> insert into APP.foo values (77);
1 row inserted/updated/deleted
ij(XA)> xa_end xa_suspend 7;
ij(XA)> -- prepare the global transactions added after the database boot
xa_end xa_success 6;
ij(XA)> xa_prepare 6;
ij(XA)> xa_end xa_success 7;
ij(XA)> xa_prepare 7;
ij(XA)> xa_end xa_success 8;
ij(XA)> xa_prepare 8;
ij(XA)> -- make a local connection and at this point, should see 4 global transactions
-- and 2 local connections
connect 'wombat' as local3;
ij(LOCAL3)> autocommit off;
ij(LOCAL3)> select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(5 |PREPARED|false|NULL |UserTransaction
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
(6 |PREPARED|false|MAMTA1 |UserTransaction
(7 |PREPARED|false|MAMTA1 |UserTransaction
(8 |PREPARED|false|MAMTA1 |UserTransaction
ij(LOCAL3)> xa_datasource 'wombat' shutdown;
ERROR 08006: Database 'wombat' shutdown.
ij(LOCAL3)> -- shutdown the datbase, restart and check the transactions in the transaction table.
xa_datasource 'wombat';
ij(LOCAL3)> xa_connect user 'mamta2' password 'mamta2';
ij(LOCAL3)> connect 'wombat' as local4;
ij(LOCAL4)> autocommit off;
ij(LOCAL4)> -- this will time out as expected
select * from APP.foo;
A
-----------
ERROR 40XL1: A lock could not be obtained within the time requested
ij(LOCAL4)> -- will see 4 global transactions and 1 local transaction
select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(5 |PREPARED|false|NULL |UserTransaction
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
(6 |PREPARED|false|NULL |UserTransaction
(7 |PREPARED|false|NULL |UserTransaction
(8 |PREPARED|false|NULL |UserTransaction
ij(LOCAL4)> xa_datasource 'wombat' shutdown;
ERROR 08006: Database 'wombat' shutdown.
ij(LOCAL4)> -- shutdown and restart and check the transaction table
xa_datasource 'wombat';
ij(LOCAL4)> xa_connect user 'mamta3' password 'mamta3';
ij(LOCAL4)> connect 'wombat' as local5;
ij(LOCAL5)> autocommit off;
ij(LOCAL5)> insert into APP.foo values(90);
1 row inserted/updated/deleted
ij(LOCAL5)> connect 'wombat' as local6;
ij(LOCAL6)> autocommit off;
ij(LOCAL6)> insert into APP.foo values(101);
1 row inserted/updated/deleted
ij(LOCAL6)> -- 4 global transactions and 2 local transactions
select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
(5 |PREPARED|false|NULL |UserTransaction
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
WARNING 01004: Data truncation
(6 |PREPARED|false|NULL |UserTransaction
(7 |PREPARED|false|NULL |UserTransaction
(8 |PREPARED|false|NULL |UserTransaction
ij(LOCAL6)> -- rollback few global transactions and commit few others
xa_rollback 5;
ij(LOCAL6)> xa_rollback 6;
ij(LOCAL6)> xa_commit xa_2Phase 7;
ij(LOCAL6)> xa_rollback 8;
ij(LOCAL6)> -- at this point, still time out because there are 2 local transactions
-- holding locks on table APP.foo
select * from APP.foo;
A
-----------
ERROR 40XL1: A lock could not be obtained within the time requested
ij(LOCAL6)> select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
ij(LOCAL6)> xa_datasource 'wombat' shutdown;
ERROR 08006: Database 'wombat' shutdown.
ij(LOCAL6)> -- shutdown and restart. There should be no global transactions at this point.
xa_datasource 'wombat';
ij(LOCAL6)> xa_connect user 'mamta4' password 'mamta4';
ij(LOCAL6)> connect 'wombat' as local7;
ij(LOCAL7)> autocommit off;
ij(LOCAL7)> -- no more locks on table APP.foo and hence select won't time out.
select * from APP.foo;
A
-----------
0
4
44
7
77
ij(LOCAL7)> -- no more global transactions, just one local transaction
select * from global_xactTable where gxid is not null order by gxid, username, status;
GXID|STATUS |READ&|USERNAME |TYPE
-------------------------------------------------------------
ij(LOCAL7)>
|
