1# 2011 February 21 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# This file implements regression tests for SQLite library. 12# 13# This file implements tests to verify that ticket [b72787b1a7] has been 14# fixed. From the ticket: 15# 16# The sqlite3ExpirePreparedStatements routine marks all statements 17# as expired. This includes statements that are not expired. 18# 19# Steps to reproduce: 20# 21# * Prepare a statement (A) 22# * Alter the schema to invalidate cookie in A 23# * Prepare a statement (B) 24# * Run B and have A run as part of B 25# * A will find a bad cookie and cause *all* statements 26# to be expired including the currently running B by calling 27# sqlite3ExpirePreparedStatements 28# * When control returns to B it will then abort 29# 30# The bug is that sqlite3ExpirePreparedStatements expires all statements. 31# Note that B was prepared after the schema change and hence is perfectly 32# valid and then is marked as expired while running. 33# 34 35set testdir [file dirname $argv0] 36source $testdir/tester.tcl 37 38ifcapable !compound { 39 finish_test 40 return 41} 42 43unset -nocomplain ::STMT 44proc runsql {} { 45 db eval {CREATE TABLE IF NOT EXISTS t4(q)} 46 sqlite3_step $::STMT 47 set rc [sqlite3_column_int $::STMT 0] 48 sqlite3_reset $::STMT 49 return $rc 50} 51 52do_test tkt-b72787b1.1 { 53 db eval { 54 CREATE TABLE t1(x); 55 INSERT INTO t1 VALUES(1); 56 INSERT INTO t1 VALUES(2); 57 CREATE TABLE t2(y); 58 INSERT INTO t2 SELECT x+2 FROM t1; 59 INSERT INTO t2 SELECT x+4 FROM t1; 60 } 61 db func runsql ::runsql 62 set DB [sqlite3_connection_pointer db] 63 set sql {SELECT max(x) FROM t1} 64 set ::STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL] 65 66 # The runsql() call on the second row of the first query will 67 # cause all $::STMT to hit an expired cookie. Prior to the fix 68 # for [b72787b1a7, the bad cookie would expire all statements, including 69 # the following compound SELECT, which would cause a fault when the 70 # second SELECT was reached. After the fix, the current statement 71 # continues to completion. 72 db eval { 73 SELECT CASE WHEN y=3 THEN y+100 WHEN y==4 THEN runsql()+200 74 ELSE 300+y END FROM t2 75 UNION ALL 76 SELECT * FROM t1; 77 } 78} {103 202 305 306 1 2} 79 80sqlite3_finalize $::STMT 81 82finish_test 83