1#
2# 2004 Feb 8
3#
4# The author disclaims copyright to this source code.  In place of
5# a legal notice, here is a blessing:
6#
7#    May you do good and not evil.
8#    May you find forgiveness for yourself and forgive others.
9#    May you share freely, never taking more than you give.
10#
11#***********************************************************************
12# This file implements regression tests for SQLite library.  The
13# focus of this script is the sqlite_interrupt() API.
14#
15# $Id: interrupt.test,v 1.4.2.1 2004/05/10 20:27:42 drh Exp $
16
17
18set testdir [file dirname $argv0]
19source $testdir/tester.tcl
20
21# Compute a checksum on the entire database.
22#
23proc cksum {{db db}} {
24  set txt [$db eval {SELECT name, type, sql FROM sqlite_master}]\n
25  foreach tbl [$db eval {SELECT name FROM sqlite_master WHERE type='table'}] {
26    append txt [$db eval "SELECT * FROM $tbl"]\n
27  }
28  foreach prag {default_synchronous default_cache_size} {
29    append txt $prag-[$db eval "PRAGMA $prag"]\n
30  }
31  set cksum [string length $txt]-[md5 $txt]
32  # puts $cksum-[file size test.db]
33  return $cksum
34}
35
36# This routine attempts to execute the sql in $sql.  It triggers an
37# interrupt a progressively later and later points during the processing
38# and checks to make sure SQLITE_INTERRUPT is returned.  Eventually,
39# the routine completes successfully.
40#
41proc interrupt_test {testid sql result {initcnt 0} {maxcnt 1000000}} {
42  set orig_sum [cksum]
43  set i $initcnt
44  global sqlite_interrupt_count
45  while {$i<$maxcnt} {
46    incr i
47    set sqlite_interrupt_count $i
48    do_test $testid.$i.1 [format {
49      set ::r [catchsql %s]
50      set ::code [db errorcode]
51      expr {$::code==0 || $::code==9}
52    } [list $sql]] 1
53    if {$::code==9} {
54      do_test $testid.$i.2 {
55        cksum
56      } $orig_sum
57    } elseif {$sqlite_interrupt_count>0} {
58      do_test $testid.$i.99 {
59        set ::r
60      } [list 0 $result]
61      break
62    }
63  }
64  set sqlite_interrupt_count 0
65}
66
67do_test interrupt-1.1 {
68  execsql {
69    CREATE TABLE t1(a,b);
70    SELECT name FROM sqlite_master;
71  }
72} {t1}
73interrupt_test interrupt-1.2 {DROP TABLE t1} {} 1 14
74do_test interrupt-1.3 {
75  execsql {
76    SELECT name FROM sqlite_master;
77  }
78} {}
79integrity_check interrupt-1.4
80
81do_test interrrupt-2.1 {
82  execsql {
83    BEGIN;
84    CREATE TABLE t1(a,b);
85    INSERT INTO t1 VALUES(1,randstr(300,400));
86    INSERT INTO t1 SELECT a+1, randstr(300,400) FROM t1;
87    INSERT INTO t1 SELECT a+2, a || '-' || b FROM t1;
88    INSERT INTO t1 SELECT a+4, a || '-' || b FROM t1;
89    INSERT INTO t1 SELECT a+8, a || '-' || b FROM t1;
90    INSERT INTO t1 SELECT a+16, a || '-' || b FROM t1;
91    INSERT INTO t1 SELECT a+32, a || '-' || b FROM t1;
92    COMMIT;
93    UPDATE t1 SET b=substr(b,-5,5);
94    SELECT count(*) from t1;
95  }
96} 64
97set origsize [file size test.db]
98set cksum [db eval {SELECT md5sum(a || b) FROM t1}]
99interrupt_test interrupt-2.2 {VACUUM} {} 100
100do_test interrupt-2.3 {
101  execsql {
102    SELECT md5sum(a || b) FROM t1;
103  }
104} $cksum
105do_test interrupt-2.4 {
106  expr {$::origsize>[file size test.db]}
107} 1
108integrity_check interrupt-2.5
109
110# Ticket #594.  If an interrupt occurs in the middle of a transaction
111# and that transaction is later rolled back, the internal schema tables do
112# not reset.
113#
114for {set i 1} {$i<50} {incr i 5} {
115  do_test interrupt-3.$i.1 {
116    execsql {
117      BEGIN;
118      CREATE TEMP TABLE t2(x,y);
119      SELECT name FROM sqlite_temp_master;
120    }
121  } {t2}
122  do_test interrupt-3.$i.2 {
123    set ::sqlite_interrupt_count $::i
124    catchsql {
125      INSERT INTO t2 SELECT * FROM t1;
126    }
127  } {1 interrupted}
128  do_test interrupt-3.$i.3 {
129    execsql {
130      SELECT name FROM sqlite_temp_master;
131    }
132  } {t2}
133  do_test interrupt-3.$i.4 {
134    catchsql {
135      ROLLBACK
136    }
137  } {0 {}}
138  do_test interrupt-3.$i.5 {
139    catchsql {SELECT name FROM sqlite_temp_master};
140    execsql {
141      SELECT name FROM sqlite_temp_master;
142    }
143  } {}
144}
145
146# There are reports of a memory leak if an interrupt occurs during
147# the beginning of a complex query - before the first callback.  We
148# will try to reproduce it here:
149#
150execsql {
151  CREATE TABLE t2(a,b,c);
152  INSERT INTO t2 SELECT round(a/10), randstr(50,80), randstr(50,60) FROM t1;
153}
154set sql {
155  SELECT max(min(b,c)), min(max(b,c)), a FROM t2 GROUP BY a ORDER BY a;
156}
157set sqlite_interrupt_count 1000000
158execsql $sql
159set max_count [expr {1000000-$sqlite_interrupt_count}]
160for {set i 1} {$i<$max_count-5} {incr i 1} {
161  do_test interrupt-4.$i.1 {
162    set ::sqlite_interrupt_count $::i
163    catchsql $sql
164  } {1 interrupted}
165}
166
167
168finish_test
169