Return to tkt-b72787b1.test CVS log

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

sqlite3

    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