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| 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 ifcapable !compound { | |
| 39 finish_test | |
| 40 return | |
| 41 } | |
| 42 | |
| 43 unset -nocomplain ::STMT | |
| 44 proc 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 | |
| 52 do_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 | |
| 80 sqlite3_finalize $::STMT | |
| 81 | |
| 82 finish_test | |
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