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Annotation of embedaddon/sqlite3/test/sidedelete.test, revision 1.1.1.1

1.1       misho       1: # 2007 Dec 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: # This file contains test cases for stressing database
                     13: # changes that involve side effects that delete rows from
                     14: # the table being changed.  Ticket #2832 shows that in
                     15: # older versions of SQLite that behavior was implemented
                     16: # incorrectly and resulted in corrupt database files.
                     17: #
                     18: # $Id: sidedelete.test,v 1.2 2008/08/04 03:51:24 danielk1977 Exp $
                     19: #
                     20: 
                     21: set testdir [file dirname $argv0]
                     22: source $testdir/tester.tcl
                     23: 
                     24: # The sequence table is created to store a sequence of integers
                     25: # starting with 1.  This is used to reinitialize other tables
                     26: # as part of other tests.
                     27: #
                     28: do_test sidedelete-1.1 {
                     29:   execsql {
                     30:     CREATE TABLE sequence(a INTEGER PRIMARY KEY);
                     31:     INSERT INTO sequence VALUES(1);
                     32:     INSERT INTO sequence VALUES(2);
                     33:   }
                     34:   for {set i 0} {$i<8} {incr i} {
                     35:     execsql {
                     36:       INSERT INTO sequence SELECT a+(SELECT max(a) FROM sequence) FROM sequence;
                     37:     }
                     38:   }
                     39:   execsql {SELECT count(*) FROM sequence}
                     40: } {512}
                     41: 
                     42: # Make a series of changes using an UPDATE OR REPLACE and a
                     43: # correlated subquery.  This would cause database corruption
                     44: # prior to the fix for ticket #2832.
                     45: #
                     46: do_test sidedelete-2.0 {
                     47:   execsql {
                     48:     CREATE TABLE t1(a PRIMARY KEY, b);
                     49:     CREATE TABLE chng(a PRIMARY KEY, b);
                     50:     SELECT count(*) FROM t1;
                     51:     SELECT count(*) FROM chng;
                     52:   }
                     53: } {0 0}
                     54: for {set i 2} {$i<=100} {incr i} {
                     55:   set n [expr {($i+2)/2}]
                     56:   do_test sidedelete-2.$i.1 {
                     57:     execsql {
                     58:       DELETE FROM t1;
                     59:       INSERT INTO t1 SELECT a, a FROM sequence WHERE a<=$i;
                     60:       DELETE FROM chng;
                     61:       INSERT INTO chng SELECT a*2, a*2+1 FROM sequence WHERE a<=$i/2;
                     62:       UPDATE OR REPLACE t1 SET a=(SELECT b FROM chng WHERE a=t1.a);
                     63:       SELECT count(*), sum(a) FROM t1;
                     64:     }
                     65:   } [list $n [expr {$n*$n-1}]]
                     66:   integrity_check sidedelete-2.$i.2
                     67: }
                     68: 
                     69: # This will cause stacks leaks but not database corruption prior
                     70: # to the #2832 fix.
                     71: #
                     72: do_test sidedelete-3.0 {
                     73:   execsql {
                     74:      DROP TABLE t1;
                     75:      CREATE TABLE t1(a PRIMARY KEY);
                     76:      SELECT * FROM t1;
                     77:   }
                     78: } {}
                     79: for {set i 1} {$i<=100} {incr i} {
                     80:   set n [expr {($i+1)/2}]
                     81:   do_test sidedelete-3.$i.1 {
                     82:     execsql {
                     83:       DELETE FROM t1;
                     84:       INSERT INTO t1 SELECT a FROM sequence WHERE a<=$i;
                     85:       UPDATE OR REPLACE t1 SET a=a+1;
                     86:       SELECT count(*), sum(a) FROM t1;
                     87:     }
                     88:   } [list $n [expr {$n*($n+1)}]]
                     89:   integrity_check sidedelete-3.$i.2
                     90: }
                     91: 
                     92: finish_test