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93 lines
2.6 KiB
Plaintext
93 lines
2.6 KiB
Plaintext
# 2007 Dec 12
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file contains test cases for stressing database
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# changes that involve side effects that delete rows from
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# the table being changed. Ticket #2832 shows that in
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# older versions of SQLite that behavior was implemented
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# incorrectly and resulted in corrupt database files.
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#
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# $Id: sidedelete.test,v 1.2 2008/08/04 03:51:24 danielk1977 Exp $
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# The sequence table is created to store a sequence of integers
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# starting with 1. This is used to reinitialize other tables
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# as part of other tests.
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#
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do_test sidedelete-1.1 {
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execsql {
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CREATE TABLE sequence(a INTEGER PRIMARY KEY);
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INSERT INTO sequence VALUES(1);
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INSERT INTO sequence VALUES(2);
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}
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for {set i 0} {$i<8} {incr i} {
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execsql {
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INSERT INTO sequence SELECT a+(SELECT max(a) FROM sequence) FROM sequence;
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}
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}
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execsql {SELECT count(*) FROM sequence}
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} {512}
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# Make a series of changes using an UPDATE OR REPLACE and a
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# correlated subquery. This would cause database corruption
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# prior to the fix for ticket #2832.
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#
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do_test sidedelete-2.0 {
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execsql {
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CREATE TABLE t1(a PRIMARY KEY, b);
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CREATE TABLE chng(a PRIMARY KEY, b);
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SELECT count(*) FROM t1;
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SELECT count(*) FROM chng;
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}
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} {0 0}
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for {set i 2} {$i<=100} {incr i} {
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set n [expr {($i+2)/2}]
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do_test sidedelete-2.$i.1 {
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execsql {
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DELETE FROM t1;
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INSERT INTO t1 SELECT a, a FROM sequence WHERE a<=$i;
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DELETE FROM chng;
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INSERT INTO chng SELECT a*2, a*2+1 FROM sequence WHERE a<=$i/2;
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UPDATE OR REPLACE t1 SET a=(SELECT b FROM chng WHERE a=t1.a);
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SELECT count(*), sum(a) FROM t1;
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}
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} [list $n [expr {$n*$n-1}]]
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integrity_check sidedelete-2.$i.2
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}
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# This will cause stacks leaks but not database corruption prior
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# to the #2832 fix.
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#
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do_test sidedelete-3.0 {
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execsql {
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DROP TABLE t1;
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CREATE TABLE t1(a PRIMARY KEY);
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SELECT * FROM t1;
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}
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} {}
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for {set i 1} {$i<=100} {incr i} {
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set n [expr {($i+1)/2}]
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do_test sidedelete-3.$i.1 {
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execsql {
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DELETE FROM t1;
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INSERT INTO t1 SELECT a FROM sequence WHERE a<=$i;
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UPDATE OR REPLACE t1 SET a=a+1;
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SELECT count(*), sum(a) FROM t1;
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}
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} [list $n [expr {$n*($n+1)}]]
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integrity_check sidedelete-3.$i.2
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}
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finish_test
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