# 2008 April 15

 #

 # 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. Specifically,

 # it tests updating tables with constraints within a trigger.  Ticket #3055.

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 ifcapable {!trigger} {

   finish_test

   return

 }

 # Create test tables with constraints.

 #

 do_test triggerB-1.1 {

   execsql {

     CREATE TABLE x(x INTEGER PRIMARY KEY, y INT NOT NULL);

     INSERT INTO x(y) VALUES(1);

     INSERT INTO x(y) VALUES(1);

     CREATE TEMP VIEW vx AS SELECT x, y, 0 AS yy FROM x;

     CREATE TEMP TRIGGER tx INSTEAD OF UPDATE OF y ON vx

     BEGIN

       UPDATE x SET y = new.y WHERE x = new.x;

     END;

     SELECT * FROM vx;

   }

 } {1 1 0 2 1 0}

 do_test triggerB-1.2 {

   execsql {

     UPDATE vx SET y = yy;

     SELECT * FROM vx;

   }

 } {1 0 0 2 0 0}

 # Added 2008-08-22:

 #

 # Name resolution within triggers.

 #

 do_test triggerB-2.1 {

   catchsql {

     CREATE TRIGGER ty AFTER INSERT ON x BEGIN

        SELECT wen.x; -- Unrecognized name

     END;

     INSERT INTO x VALUES(1,2);

   }

 } {1 {no such column: wen.x}}

 do_test triggerB-2.2 {

   catchsql {

     CREATE TRIGGER tz AFTER UPDATE ON x BEGIN

        SELECT dlo.x; -- Unrecognized name

     END;

     UPDATE x SET y=y+1;

   }

 } {1 {no such column: dlo.x}}

 do_test triggerB-2.3 {

   execsql {

     CREATE TABLE t2(a INTEGER PRIMARY KEY, b);

     INSERT INTO t2 VALUES(1,2);

     CREATE TABLE changes(x,y);

     CREATE TRIGGER r1t2 AFTER UPDATE ON t2 BEGIN

       INSERT INTO changes VALUES(new.a, new.b);

     END;

   }

   execsql {

     UPDATE t2 SET a=a+10;

     SELECT * FROM changes;

   }

 } {11 2}

 do_test triggerB-2.4 {

   execsql {

     CREATE TRIGGER r2t2 AFTER DELETE ON t2 BEGIN

       INSERT INTO changes VALUES(old.a, old.c);

     END;

   }

   catchsql {

     DELETE FROM t2;

   }

 } {1 {no such column: old.c}}

 # Triggers maintain a mask of columns from the invoking table that are

 # used in the trigger body as NEW.column or OLD.column.  That mask is then

 # used to reduce the amount of information that needs to be loaded into

 # the NEW and OLD pseudo-tables at run-time.

 #

 # These tests cases check the logic for when there are many columns - more

 # than will fit in a bitmask.

 #

 do_test triggerB-3.1 {

   execsql {

     CREATE TABLE t3(

        c0,  c1,  c2,  c3,  c4,  c5,  c6,  c7,  c8,  c9,

        c10, c11, c12, c13, c14, c15, c16, c17, c18, c19,

        c20, c21, c22, c23, c24, c25, c26, c27, c28, c29,

        c30, c31, c32, c33, c34, c35, c36, c37, c38, c39,

        c40, c41, c42, c43, c44, c45, c46, c47, c48, c49,

        c50, c51, c52, c53, c54, c55, c56, c57, c58, c59,

        c60, c61, c62, c63, c64, c65

     );

     CREATE TABLE t3_changes(colnum, oldval, newval);

     INSERT INTO t3 VALUES(

        'a0', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'a9',

        'a10','a11','a12','a13','a14','a15','a16','a17','a18','a19',

        'a20','a21','a22','a23','a24','a25','a26','a27','a28','a29',

        'a30','a31','a32','a33','a34','a35','a36','a37','a38','a39',

        'a40','a41','a42','a43','a44','a45','a46','a47','a48','a49',

        'a50','a51','a52','a53','a54','a55','a56','a57','a58','a59',

        'a60','a61','a62','a63','a64','a65'

     );

   }

   for {set i 0} {$i<=65} {incr i} {

     set sql [subst {

       CREATE TRIGGER t3c$i AFTER UPDATE ON t3

          WHEN old.c$i!=new.c$i BEGIN

           INSERT INTO t3_changes VALUES($i, old.c$i, new.c$i);

       END

     }]

     db eval $sql

   }

   execsql {

     SELECT * FROM t3_changes

   }

 } {}

 for {set i 0} {$i<=64} {incr i} {

   do_test triggerB-3.2.$i.1 [subst {

     execsql {

       UPDATE t3 SET c$i='b$i';

       SELECT * FROM t3_changes ORDER BY rowid DESC LIMIT 1;

     }

   }] [subst {$i a$i b$i}]

   do_test triggerB-3.2.$i.2 [subst {

     execsql {

       SELECT count(*) FROM t3_changes

     }

   }] [expr {$i+1}]

   do_test triggerB-3.2.$i.2 [subst {

     execsql {

       SELECT * FROM t3_changes WHERE colnum=$i

     }

   }] [subst {$i a$i b$i}]

 }

 finish_test