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      1 # 2007 June 26
      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.  The
     12 # focus of this file is testing the ALTER TABLE ... RENAME TO
     13 # command on virtual tables.
     14 #
     15 # $Id: vtab_alter.test,v 1.3 2007/12/13 21:54:11 drh Exp $
     16 
     17 set testdir [file dirname $argv0]
     18 source $testdir/tester.tcl
     19 
     20 ifcapable !vtab||!altertable {
     21   finish_test
     22   return
     23 }
     24 
     25 # Register the echo module.
     26 #
     27 # This test uses a special feature of the echo module. If the name
     28 # of the virtual table is a prefix of the name of the underlying
     29 # real table (for example if the v-table is "tbl" and the real table
     30 # is "tbl_base"), then the name of the real table is modified
     31 # when an "ALTER TABLE ... RENAME TO" is executed on the v-table.
     32 # For example:
     33 #
     34 #   sqlite> CREATE TABLE t1_base(a, b, c); 
     35 #   sqlite> CREATE VIRTUAL TABLE t1 USING(t1_base);
     36 #   sqlite> ALTER TABLE t1 RENAME TO t2;
     37 #   sqlite> SELECT tbl_name FROM sqlite_master;
     38 #   t2_base
     39 #   t2
     40 #
     41 register_echo_module [sqlite3_connection_pointer db]
     42 
     43 
     44 # Try to rename an echo table. Make sure nothing terrible happens.
     45 #
     46 do_test vtab_alter-1.1 {
     47   execsql { CREATE TABLE t1(a, b VARCHAR, c INTEGER) }
     48 } {}
     49 do_test vtab_alter-1.2 {
     50   execsql { CREATE VIRTUAL TABLE t1echo USING echo(t1) }
     51 } {}
     52 do_test vtab_alter-1.3 {
     53   catchsql { SELECT * FROM t1echo }
     54 } {0 {}}
     55 do_test vtab_alter-1.4 {
     56   execsql { ALTER TABLE t1echo RENAME TO new }
     57 } {}
     58 do_test vtab_alter-1.5 {
     59   catchsql { SELECT * FROM t1echo }
     60 } {1 {no such table: t1echo}}
     61 do_test vtab_alter-1.6 {
     62   catchsql { SELECT * FROM new }
     63 } {0 {}}
     64 
     65 # Try to rename an echo table that renames its base table. Make 
     66 # sure nothing terrible happens.
     67 #
     68 do_test vtab_alter-2.1 {
     69   execsql { 
     70     DROP TABLE new;
     71     DROP TABLE t1;
     72     CREATE TABLE t1_base(a, b, c);
     73     CREATE VIRTUAL TABLE t1 USING echo('*_base');
     74   }
     75 } {}
     76 do_test vtab_alter-2.2 {
     77   execsql { 
     78     INSERT INTO t1_base VALUES(1, 2, 3);
     79     SELECT * FROM t1;
     80   }
     81 } {1 2 3}
     82 do_test vtab_alter-2.3 {
     83   execsql { ALTER TABLE t1 RENAME TO x }
     84 } {}
     85 do_test vtab_alter-2.4 {
     86   execsql { SELECT * FROM x; }
     87 } {1 2 3}
     88 do_test vtab_alter-2.5 {
     89   execsql { SELECT * FROM x_base; }
     90 } {1 2 3}
     91 
     92 # Cause an error to occur when the echo module renames its
     93 # backing store table.
     94 #
     95 do_test vtab_alter-3.1 {
     96   execsql  { CREATE TABLE y_base(a, b, c) }
     97   catchsql { ALTER TABLE x RENAME TO y }
     98 } {1 {SQL logic error or missing database}}
     99 do_test vtab_alter-3.2 {
    100   execsql  { SELECT * FROM x }
    101 } {1 2 3}
    102 
    103 finish_test
    104