xref: /sqlite-3.40.0/test/tempdb2.test (revision af94adf0) 
1# 2016 March 3
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice, here is a blessing:
5#
6#    May you do good and not evil.
7#    May you find forgiveness for yourself and forgive others.
8#    May you share freely, never taking more than you give.
9#
10#***********************************************************************
11
12set testdir [file dirname $argv0]
13source $testdir/tester.tcl
14set testprefix tempdb2
15
16db close
17sqlite3 db ""
18
19set unlocked unlocked
20if {$::TEMP_STORE>=2} { set unlocked unknown }
21
22proc int2str {i} { string range [string repeat "$i." 450] 0 899 }
23db func int2str int2str
24
25#-------------------------------------------------------------------------
26#
27#  1.1: Write a big transaction to the db. One so large that it forces
28#       the file to be created and the cache flushed to disk on COMMIT.
29#
30#  1.2: Write a small transaction - one small enough that it remains in
31#       memory on COMMIT. All the pages of table [t1] are now dirty.
32#
33#  1.3: Delete the contents of [t1]. This moves all of its leaves to the
34#       free-list and causes the btree layer to call PagerDontWrite() on
35#       each of them.
36#
37#       Then do a big update on table [t2]. So big that the former leaves
38#       of [t1] are forced out of the cache. Then roll back the transaction.
39#       If the PagerDontWrite() calls are honoured and the data is not written
40#       to disk, the update made in test 1.2 will be lost at this point. Or, if
41#       they are ignored (as they should be for temp databases), the update
42#       will be safely written out to disk before the cache entries are
43#       discarded.
44#
45do_execsql_test 1.1 {
46  PRAGMA page_size=1024;
47  PRAGMA cache_size=50;
48
49  BEGIN;
50    CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
51    INSERT INTO t1 VALUES(1, int2str(1));
52    INSERT INTO t1 VALUES(2, int2str(1));
53    INSERT INTO t1 VALUES(3, int2str(1));
54
55    CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
56    WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 )
57    INSERT INTO t2 SELECT x, int2str(x) FROM c;
58  COMMIT;
59
60  PRAGMA lock_status;
61} [list main $unlocked temp closed]
62
63do_execsql_test 1.2 {
64  UPDATE t1 SET b=int2str(2);
65  SELECT b=int2str(2) FROM t1
66} {1 1 1}
67
68do_execsql_test 1.3 {
69  BEGIN;
70    DELETE FROM t1;
71    UPDATE t2 SET b=int2str(a+1);
72  ROLLBACK;
73}
74
75do_execsql_test 1.4 {
76  SELECT b=int2str(2) FROM t1
77} {1 1 1}
78
79#-------------------------------------------------------------------------
80db close
81sqlite3 db ""
82db func int2str int2str
83
84do_execsql_test 2.0 {
85  PRAGMA cache_size = -100;
86  CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
87  WITH c(x) AS ( VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100 )
88    INSERT INTO t1 SELECT x, int2str(x) FROM c;
89}
90
91do_execsql_test 2.1 {
92  INSERT INTO t1 VALUES(10001, int2str(1001) || int2str(1001) || int2str(1001));
93}
94
95do_execsql_test 2.2 {
96  SELECT b FROM t1 WHERE a = 10001;
97} "[int2str 1001][int2str 1001][int2str 1001]"
98
99finish_test
100