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 35 set testdir [file dirname $argv0] 36 source $testdir/tester.tcl 37 38 unset -nocomplain ::STMT 39 proc runsql {} { 40 db eval {CREATE TABLE IF NOT EXISTS t4(q)} 41 sqlite3_step $::STMT 42 set rc [sqlite3_column_int $::STMT 0] 43 sqlite3_reset $::STMT 44 return $rc 45 } 46 47 do_test tkt-b72787b1.1 { 48 db eval { 49 CREATE TABLE t1(x); 50 INSERT INTO t1 VALUES(1); 51 INSERT INTO t1 VALUES(2); 52 CREATE TABLE t2(y); 53 INSERT INTO t2 SELECT x+2 FROM t1; 54 INSERT INTO t2 SELECT x+4 FROM t1; 55 } 56 db func runsql ::runsql 57 set DB [sqlite3_connection_pointer db] 58 set sql {SELECT max(x) FROM t1} 59 set ::STMT [sqlite3_prepare_v2 $DB $sql -1 TAIL] 60 61 # The runsql() call on the second row of the first query will 62 # cause all $::STMT to hit an expired cookie. Prior to the fix 63 # for [b72787b1a7, the bad cookie would expire all statements, including 64 # the following compound SELECT, which would cause a fault when the 65 # second SELECT was reached. After the fix, the current statement 66 # continues to completion. 67 db eval { 68 SELECT CASE WHEN y=3 THEN y+100 WHEN y==4 THEN runsql()+200 69 ELSE 300+y END FROM t2 70 UNION ALL 71 SELECT * FROM t1; 72 } 73 } {103 202 305 306 1 2} 74 75 sqlite3_finalize $::STMT 76 77 finish_test 78
