# 2007 June 26

#

# The author disclaims copyright to this source code.  In place of

# a legal notice, here is a blessing:

#

#    May you do good and not evil.

#    May you find forgiveness for yourself and forgive others.

#    May you share freely, never taking more than you give.

#

#***********************************************************************

# This file implements regression tests for SQLite library.  The

# focus of this file is testing the ALTER TABLE ... RENAME TO

# command on virtual tables.

#

# $Id: vtab_alter.test,v 1.3 2007/12/13 21:54:11 drh Exp $

set testdir [file dirname $argv0]

source $testdir/tester.tcl

ifcapable !vtab {

  finish_test

  return

}

# Register the echo module.

#

# This test uses a special feature of the echo module. If the name

# of the virtual table is a prefix of the name of the underlying

# real table (for example if the v-table is "tbl" and the real table

# is "tbl_base"), then the name of the real table is modified

# when an "ALTER TABLE ... RENAME TO" is executed on the v-table.

# For example:

#

#   sqlite> CREATE TABLE t1_base(a, b, c); 

#   sqlite> CREATE VIRTUAL TABLE t1 USING(t1_base);

#   sqlite> ALTER TABLE t1 RENAME TO t2;

#   sqlite> SELECT tbl_name FROM sqlite_master;

#   t2_base

#   t2

#

register_echo_module [sqlite3_connection_pointer db]

# Try to rename an echo table. Make sure nothing terrible happens.

#

do_test vtab_alter-1.1 {

  execsql { CREATE TABLE t1(a, b VARCHAR, c INTEGER) }

} {}

do_test vtab_alter-1.2 {

  execsql { CREATE VIRTUAL TABLE t1echo USING echo(t1) }

} {}

do_test vtab_alter-1.3 {

  catchsql { SELECT * FROM t1echo }

} {0 {}}

do_test vtab_alter-1.4 {

  execsql { ALTER TABLE t1echo RENAME TO new }

} {}

do_test vtab_alter-1.5 {

  catchsql { SELECT * FROM t1echo }

} {1 {no such table: t1echo}}

do_test vtab_alter-1.6 {

  catchsql { SELECT * FROM new }

} {0 {}}

# Try to rename an echo table that renames its base table. Make 

# sure nothing terrible happens.

#

do_test vtab_alter-2.1 {

  execsql { 

    DROP TABLE new;

    DROP TABLE t1;

    CREATE TABLE t1_base(a, b, c);

    CREATE VIRTUAL TABLE t1 USING echo('*_base');

  }

} {}

do_test vtab_alter-2.2 {

  execsql { 

    INSERT INTO t1_base VALUES(1, 2, 3);

    SELECT * FROM t1;

  }

} {1 2 3}

do_test vtab_alter-2.3 {

  execsql { ALTER TABLE t1 RENAME TO x }

} {}

do_test vtab_alter-2.4 {

  execsql { SELECT * FROM x; }

} {1 2 3}

do_test vtab_alter-2.5 {

  execsql { SELECT * FROM x_base; }

} {1 2 3}

# Cause an error to occur when the echo module renames its

# backing store table.

#

do_test vtab_alter-3.1 {

  execsql  { CREATE TABLE y_base(a, b, c) }

  catchsql { ALTER TABLE x RENAME TO y }

} {1 {SQL logic error or missing database}}

do_test vtab_alter-3.2 {

  execsql  { SELECT * FROM x }

} {1 2 3}

finish_test