SQLite

**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.378 2007/08/13 15:28:34 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** The version of the library

      }
      sqlite3BtreeRollback(db->aDb[i].pBt);
      db->aDb[i].inTrans = 0;
    }
  }
  sqlite3VtabRollback(db);
  if( db->flags&SQLITE_InternChanges ){
    sqlite3ExpirePreparedStatements(db);
    sqlite3ResetInternalSchema(db, 0);
  }

  /* If one has been configured, invoke the rollback-hook callback */
  if( db->xRollbackCallback && (inTrans || !db->autoCommit) ){
    db->xRollbackCallback(db->pRollbackArg);
  }

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file implements tests for miscellanous features that were
# left out of other test files.
#
# $Id: misc4.test,v 1.22 2007/08/13 15:28:35 danielk1977 Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Prepare a statement that will create a temporary table.  Then do
# a rollback.  Then try to execute the prepared statement.
#

    execsql {
      BEGIN;
      CREATE TABLE t3(a,b,c);
      INSERT INTO t1 SELECT * FROM t1;
      ROLLBACK;
    }
  } {}

  # Because the previous transaction included a DDL statement and
  # was rolled back, statement $stmt was marked as expired. Executing it
  # now returns SQLITE_SCHEMA.
  do_test misc4-1.2.1 {
    list [sqlite3_step $stmt] [sqlite3_finalize $stmt]
  } {SQLITE_ERROR SQLITE_SCHEMA}
  do_test misc4-1.2.2 {
    set stmt [sqlite3_prepare $DB $sql -1 TAIL]
    set TAIL
  } {}

  do_test misc4-1.3 {
    sqlite3_step $stmt
  } SQLITE_DONE
  do_test misc4-1.4 {
    execsql {
      SELECT * FROM temp.t2;
    }

#
#***********************************************************************
# This file implements regression tests for SQLite library.
#
# This file tests the various conditions under which an SQLITE_SCHEMA
# error should be returned.
#
# $Id: schema.test,v 1.7 2007/08/13 15:28:35 danielk1977 Exp $

#---------------------------------------------------------------------
# When any of the following types of SQL statements or actions are 
# executed, all pre-compiled statements are invalidated. An attempt
# to execute an invalidated statement always returns SQLITE_SCHEMA.
#
# CREATE/DROP TABLE...................................schema-1.*
# CREATE/DROP VIEW....................................schema-2.*
# CREATE/DROP TRIGGER.................................schema-3.*
# CREATE/DROP INDEX...................................schema-4.*
# DETACH..............................................schema-5.*
# Deleting a user-function............................schema-6.*
# Deleting a collation sequence.......................schema-7.*
# Setting or changing the authorization function......schema-8.*
# Rollback of a DDL statement.........................schema-12.*
#
# Test cases schema-9.* and schema-10.* test some specific bugs
# that came up during development.
#
# Test cases schema-11.* test that it is impossible to delete or
# change a collation sequence or user-function while SQL statements
# are executing. Adding new collations or functions is allowed.

    db collate tstcollate {}
  } msg]
  list $rc $msg
} {1 {Unable to delete/modify collation sequence due to active statements}}
do_test schema-11.8 {
  sqlite3_finalize $::STMT
} {SQLITE_OK}

# The following demonstrates why statements need to be expired whenever
# there is a rollback (explicit or otherwise).
#
do_test schema-12.1 {
  # Begin a transaction and create a table. This increments 
  # the schema cookie. Then compile an SQL statement, using
  # the current (incremented) value of the cookie.
  execsql {
    BEGIN;
    CREATE TABLE t3(a, b, c);
  }
  set ::STMT [sqlite3_prepare $::DB "CREATE TABLE t4(a,b,c)" -1 TAIL]

  # Rollback the transaction, resetting the schema cookie to the value
  # it had at the start of this test case. Then create a table, 
  # incrementing the schema cookie.
  execsql {
    ROLLBACK;
    CREATE TABLE t4(a, b, c);
  }

  # The schema cookie now has the same value as it did when SQL statement
  # $::STMT was prepared. So unless it has been expired, it would be
  # possible to run the "CREATE TABLE t4" statement and create a
  # duplicate table.
  list [sqlite3_step $::STMT] [sqlite3_finalize $::STMT]
} {SQLITE_ERROR SQLITE_SCHEMA}

finish_test