Annotation of embedaddon/sqlite3/test/corruptF.test, revision 1.1.1.1
1.1 misho 1: # 2012 January 12
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: #
12:
13: set testdir [file dirname $argv0]
14: source $testdir/tester.tcl
15: set testprefix corruptF
16:
17: # Do not use a codec for tests in this file, as the database file is
18: # manipulated directly using tcl scripts (using the [hexio_write] command).
19: #
20: do_not_use_codec
21:
22: proc str {i} { format %08d $i }
23:
24: # Create a 6 page database containing a single table - t1. Table t1
25: # consists of page 2 (the root page) and pages 5 and 6 (leaf pages).
26: # Database pages 3 and 4 are on the free list.
27: #
28: proc create_test_db {} {
29: catch { db close }
30: forcedelete test.db
31: sqlite3 db test.db
32: db func str str
33: execsql {
34: PRAGMA auto_vacuum = 0;
35: PRAGMA page_size = 1024;
36: CREATE TABLE t1(x); /* root page = 2 */
37: CREATE TABLE t2(x); /* root page = 3 */
38: CREATE TABLE t3(x); /* root page = 4 */
39:
40: INSERT INTO t1 VALUES(str(1));
41: INSERT INTO t1 SELECT str(rowid+1) FROM t1;
42: INSERT INTO t1 SELECT str(rowid+2) FROM t1;
43: INSERT INTO t1 SELECT str(rowid+4) FROM t1;
44: INSERT INTO t1 SELECT str(rowid+8) FROM t1;
45: INSERT INTO t1 SELECT str(rowid+16) FROM t1;
46: INSERT INTO t1 SELECT str(rowid+32) FROM t1;
47: INSERT INTO t1 SELECT str(rowid+64) FROM t1;
48: DROP TABLE t2;
49: DROP TABLE t3;
50: }
51: db close
52: }
53:
54: do_test 1.1 { create_test_db } {}
55:
56: # Check the db is as we expect. 6 pages in total, with 3 and 4 on the free
57: # list. Page 3 is the free list trunk and page 4 is a leaf.
58: #
59: do_test 1.2 { file size test.db } [expr 6*1024]
60: do_test 1.3 { hexio_read test.db 32 4 } 00000003
61: do_test 1.4 { hexio_read test.db [expr 2*1024] 12 } 000000000000000100000004
62:
63: # Change the free-list entry to page 6 and reopen the db file.
64: do_test 1.5 {
65: hexio_write test.db [expr 2*1024 + 8] 00000006
66: sqlite3 db test.db
67: } {}
68:
69: # Now create a new table in the database file. The root of the new table
70: # is page 6, which is also the right-most leaf page in table t1.
71: #
72: do_execsql_test 1.6 {
73: CREATE TABLE t4(x);
74: SELECT * FROM sqlite_master;
75: } {
76: table t1 t1 2 {CREATE TABLE t1(x)}
77: table t4 t4 6 {CREATE TABLE t4(x)}
78: }
79:
80: # At one point this was causing an assert to fail.
81: #
82: # This statement opens a cursor on table t1 and does a full table scan. As
83: # each row is visited, it is copied into table t4. There is no temporary
84: # table.
85: #
86: # When the t1 cursor reaches page 6 (which is both the right-most leaf of
87: # t1 and the root of t4), it continues to iterate through the keys within
88: # it (which at this point are keys that have been inserted into t4). And
89: # for each row visited, another row is inserted into page 6 - it being the
90: # root page of t4. Eventually, page 6 becomes full and the height of the
91: # b-tree for table t4 increased. From the point of view of the t1 cursor,
92: # this unexpectedly reduces the number of keys on page 6 in the middle of
93: # its iteration, which causes an assert() to fail.
94: #
95: db_save_and_close
96: if 1 {
97: for {set i 0} {$i < 128} {incr i} {
98: db_restore_and_reopen
99: do_test 1.7.$i {
100: set res [
101: catchsql { INSERT INTO t4 SELECT x FROM t1 WHERE rowid>$i }
102: ]
103: if {$res == "0 {}" || $res == "1 {database disk image is malformed}"} {
104: set res ""
105: }
106: set res
107: } {}
108: }
109: }
110:
111: do_test 2.1 { create_test_db } {}
112: do_test 2.2 { file size test.db } [expr 6*1024]
113: do_test 2.3 { hexio_read test.db 32 4 } 00000003
114: do_test 2.4 { hexio_read test.db [expr 2*1024] 12 } 000000000000000100000004
115:
116: # Change the free-list entry to page 5 and reopen the db file.
117: do_test 2.5 {
118: hexio_write test.db [expr 2*1024 + 8] 00000005
119: sqlite3 db test.db
120: } {}
121:
122: # Now create a new table in the database file. The root of the new table
123: # is page 5, which is also the right-most leaf page in table t1.
124: #
125: do_execsql_test 2.6 {
126: CREATE TABLE t4(x);
127: SELECT * FROM sqlite_master;
128: } {
129: table t1 t1 2 {CREATE TABLE t1(x)}
130: table t4 t4 5 {CREATE TABLE t4(x)}
131: }
132:
133: db_save_and_close
134: for {set i 127} {$i >= 0} {incr i -1} {
135: db_restore_and_reopen
136: do_test 2.7.$i {
137: set res [
138: catchsql {
139: INSERT INTO t4 SELECT x FROM t1 WHERE rowid<$i ORDER BY rowid DESC
140: }
141: ]
142: if {$res == "0 {}" || $res == "1 {database disk image is malformed}"} {
143: set res ""
144: }
145: set res
146: } {}
147: }
148:
149: finish_test
150:
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