Return to tkt-b72787b1.test CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / sqlite3 / test

Annotation of embedaddon/sqlite3/test/tkt-b72787b1.test, revision 1.1.1.1

1.1       misho       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