# 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