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# 2004 Feb 8
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this script is the sqlite_interrupt() API.
#
# $Id: interrupt.test,v 1.16 2008/01/16 17:46:38 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set DB [sqlite3_connection_pointer db]
# This routine attempts to execute the sql in $sql. It triggers an
# interrupt at progressively later and later points during the processing
# and checks to make sure SQLITE_INTERRUPT is returned. Eventually,
# the routine completes successfully.
#
proc interrupt_test {testid sql result {initcnt 0}} {
set orig_sum [cksum]
set i $initcnt
while 1 {
incr i
set ::sqlite_interrupt_count $i
do_test $testid.$i.1 [format {
set ::r [catchsql %s]
set ::code [db errorcode]
expr {$::code==0 || $::code==9}
} [list $sql]] 1
if {$::code==9} {
do_test $testid.$i.2 {
cksum
} $orig_sum
} else {
do_test $testid.$i.99 {
set ::r
} [list 0 $result]
break
}
}
set ::sqlite_interrupt_count 0
}
do_test interrupt-1.1 {
execsql {
CREATE TABLE t1(a,b);
SELECT name FROM sqlite_master;
}
} {t1}
interrupt_test interrupt-1.2 {DROP TABLE t1} {}
do_test interrupt-1.3 {
execsql {
SELECT name FROM sqlite_master;
}
} {}
integrity_check interrupt-1.4
do_test interrrupt-2.1 {
execsql {
BEGIN;
CREATE TABLE t1(a,b);
INSERT INTO t1 VALUES(1,randstr(300,400));
INSERT INTO t1 SELECT a+1, randstr(300,400) FROM t1;
INSERT INTO t1 SELECT a+2, a || '-' || b FROM t1;
INSERT INTO t1 SELECT a+4, a || '-' || b FROM t1;
INSERT INTO t1 SELECT a+8, a || '-' || b FROM t1;
INSERT INTO t1 SELECT a+16, a || '-' || b FROM t1;
INSERT INTO t1 SELECT a+32, a || '-' || b FROM t1;
COMMIT;
UPDATE t1 SET b=substr(b,-5,5);
SELECT count(*) from t1;
}
} 64
set origsize [file size test.db]
set cksum [db eval {SELECT md5sum(a || b) FROM t1}]
ifcapable {vacuum} {
interrupt_test interrupt-2.2 {VACUUM} {} 100
}
do_test interrupt-2.3 {
execsql {
SELECT md5sum(a || b) FROM t1;
}
} $cksum
ifcapable {vacuum && !default_autovacuum} {
do_test interrupt-2.4 {
expr {$::origsize>[file size test.db]}
} 1
}
ifcapable {explain} {
do_test interrupt-2.5 {
set sql {EXPLAIN SELECT max(a,b), a, b FROM t1}
execsql $sql
set rc [catch {db eval $sql {sqlite3_interrupt $DB}} msg]
lappend rc $msg
} {1 interrupted}
}
integrity_check interrupt-2.6
# Ticket #594. If an interrupt occurs in the middle of a transaction
# and that transaction is later rolled back, the internal schema tables do
# not reset.
#
# UPDATE: Interrupting a DML statement in the middle of a transaction now
# causes the transaction to roll back. Leaving the transaction open after
# an SQL statement was interrupted halfway through risks database corruption.
#
ifcapable tempdb {
for {set i 1} {$i<50} {incr i 5} {
do_test interrupt-3.$i.1 {
execsql {
BEGIN;
CREATE TEMP TABLE t2(x,y);
SELECT name FROM sqlite_temp_master;
}
} {t2}
do_test interrupt-3.$i.2 {
set ::sqlite_interrupt_count $::i
catchsql {
INSERT INTO t2 SELECT * FROM t1;
}
} {1 interrupted}
do_test interrupt-3.$i.3 {
execsql {
SELECT name FROM sqlite_temp_master;
}
} {}
do_test interrupt-3.$i.4 {
catchsql {
ROLLBACK
}
} {1 {cannot rollback - no transaction is active}}
do_test interrupt-3.$i.5 {
catchsql {SELECT name FROM sqlite_temp_master};
execsql {
SELECT name FROM sqlite_temp_master;
}
} {}
}
}
# There are reports of a memory leak if an interrupt occurs during
# the beginning of a complex query - before the first callback. We
# will try to reproduce it here:
#
execsql {
CREATE TABLE t2(a,b,c);
INSERT INTO t2 SELECT round(a/10), randstr(50,80), randstr(50,60) FROM t1;
}
set sql {
SELECT max(min(b,c)), min(max(b,c)), a FROM t2 GROUP BY a ORDER BY a;
}
set sqlite_interrupt_count 1000000
execsql $sql
set max_count [expr {1000000-$sqlite_interrupt_count}]
for {set i 1} {$i<$max_count-5} {incr i 1} {
do_test interrupt-4.$i.1 {
set ::sqlite_interrupt_count $::i
catchsql $sql
} {1 interrupted}
}
# Interrupt during parsing
#
do_test interrupt-5.1 {
proc fake_interrupt {args} {
db collate fake_collation no-op
sqlite3_interrupt db
return SQLITE_OK
}
db collation_needed fake_interrupt
catchsql {
CREATE INDEX fake ON fake1(a COLLATE fake_collation, b, c DESC);
}
} {1 interrupt}
finish_test
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