# 2008 February 12

 #

 # 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 issues relating to firing an INSTEAD OF trigger on a VIEW

 # when one tries to UPDATE or DELETE from the view.  Does the WHERE

 # clause of the UPDATE or DELETE statement get passed down correctly 

 # into the query that manifests the view?

 #

 # Ticket #2938

 #

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 ifcapable !trigger||!compound {

   finish_test

   return

 }

 # Create two table containing some sample data

 #

 do_test triggerA-1.1 {

   db eval {

     CREATE TABLE t1(x INTEGER PRIMARY KEY, y TEXT UNIQUE);

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

   }

   set i 1

   foreach word {one two three four five six seven eight nine ten} {

     set j [expr {$i*100 + [string length $word]}]

     db eval {

        INSERT INTO t1 VALUES($i,$word);

        INSERT INTO t2 VALUES(20-$i,$j,$word);

     }

     incr i

   }

   db eval {

     SELECT count(*) FROM t1 UNION ALL SELECT count(*) FROM t2;

   }

 } {10 10}

 # Create views of various forms against one or both of the two tables.

 #

 do_test triggerA-1.2 {

   db eval {

      CREATE VIEW v1 AS SELECT y, x FROM t1;

      SELECT * FROM v1 ORDER BY 1;

   }

 } {eight 8 five 5 four 4 nine 9 one 1 seven 7 six 6 ten 10 three 3 two 2}

 do_test triggerA-1.3 {

   db eval {

      CREATE VIEW v2 AS SELECT x, y FROM t1 WHERE y GLOB '*e*';

      SELECT * FROM v2 ORDER BY 1;

   }

 } {1 one 3 three 5 five 7 seven 8 eight 9 nine 10 ten}

 do_test triggerA-1.4 {

   db eval {

      CREATE VIEW v3 AS

        SELECT CAST(x AS TEXT) AS c1 FROM t1 UNION SELECT y FROM t1;

      SELECT * FROM v3 ORDER BY c1;

   }

 } {1 10 2 3 4 5 6 7 8 9 eight five four nine one seven six ten three two}

 do_test triggerA-1.5 {

   db eval {

      CREATE VIEW v4 AS

         SELECT CAST(x AS TEXT) AS c1 FROM t1

         UNION SELECT y FROM t1 WHERE x BETWEEN 3 and 5;

      SELECT * FROM v4 ORDER BY 1;

   }

 } {1 10 2 3 4 5 6 7 8 9 five four three}

 do_test triggerA-1.6 {

   db eval {

      CREATE VIEW v5 AS SELECT x, b FROM t1, t2 WHERE y=c;

      SELECT * FROM v5;

   }

 } {1 103 2 203 3 305 4 404 5 504 6 603 7 705 8 805 9 904 10 1003}

 # Create INSTEAD OF triggers on the views.  Run UPDATE and DELETE statements

 # using those triggers.  Verify correct operation.

 #

 do_test triggerA-2.1 {

   db eval {

      CREATE TABLE result2(a,b);

      CREATE TRIGGER r1d INSTEAD OF DELETE ON v1 BEGIN

        INSERT INTO result2(a,b) VALUES(old.y, old.x);

      END;

      DELETE FROM v1 WHERE x=5;

      SELECT * FROM result2;

   }

 } {five 5}

 do_test triggerA-2.2 {

   db eval {

      CREATE TABLE result4(a,b,c,d);

      CREATE TRIGGER r1u INSTEAD OF UPDATE ON v1 BEGIN

        INSERT INTO result4(a,b,c,d) VALUES(old.y, old.x, new.y, new.x);

      END;

      UPDATE v1 SET y=y||'-extra' WHERE x BETWEEN 3 AND 5;

      SELECT * FROM result4 ORDER BY a;

   }

 } {five 5 five-extra 5 four 4 four-extra 4 three 3 three-extra 3}

 do_test triggerA-2.3 {

   db eval {

      DELETE FROM result2;

      CREATE TRIGGER r2d INSTEAD OF DELETE ON v2 BEGIN

        INSERT INTO result2(a,b) VALUES(old.y, old.x);

      END;

      DELETE FROM v2 WHERE x=5;

      SELECT * FROM result2;

   }

 } {five 5}

 do_test triggerA-2.4 {

   db eval {

      DELETE FROM result4;

      CREATE TRIGGER r2u INSTEAD OF UPDATE ON v2 BEGIN

        INSERT INTO result4(a,b,c,d) VALUES(old.y, old.x, new.y, new.x);

      END;

      UPDATE v2 SET y=y||'-extra' WHERE x BETWEEN 3 AND 5;

      SELECT * FROM result4 ORDER BY a;

   }

 } {five 5 five-extra 5 three 3 three-extra 3}

 do_test triggerA-2.5 {

   db eval {

      CREATE TABLE result1(a);

      CREATE TRIGGER r3d INSTEAD OF DELETE ON v3 BEGIN

        INSERT INTO result1(a) VALUES(old.c1);

      END;

      DELETE FROM v3 WHERE c1 BETWEEN '8' AND 'eight';

      SELECT * FROM result1 ORDER BY a;

   }

 } {8 9 eight}

 do_test triggerA-2.6 {

   db eval {

      DELETE FROM result2;

      CREATE TRIGGER r3u INSTEAD OF UPDATE ON v3 BEGIN

        INSERT INTO result2(a,b) VALUES(old.c1, new.c1);

      END;

      UPDATE v3 SET c1 = c1 || '-extra' WHERE c1 BETWEEN '8' and 'eight';

      SELECT * FROM result2 ORDER BY a;

   }

 } {8 8-extra 9 9-extra eight eight-extra}

 do_test triggerA-2.7 {

   db eval {

      DELETE FROM result1;

      CREATE TRIGGER r4d INSTEAD OF DELETE ON v4 BEGIN

        INSERT INTO result1(a) VALUES(old.c1);

      END;

      DELETE FROM v4 WHERE c1 BETWEEN '8' AND 'eight';

      SELECT * FROM result1 ORDER BY a;

   }

 } {8 9}

 do_test triggerA-2.8 {

   db eval {

      DELETE FROM result2;

      CREATE TRIGGER r4u INSTEAD OF UPDATE ON v4 BEGIN

        INSERT INTO result2(a,b) VALUES(old.c1, new.c1);

      END;

      UPDATE v4 SET c1 = c1 || '-extra' WHERE c1 BETWEEN '8' and 'eight';

      SELECT * FROM result2 ORDER BY a;

   }

 } {8 8-extra 9 9-extra}

 do_test triggerA-2.9 {

   db eval {

      DELETE FROM result2;

      CREATE TRIGGER r5d INSTEAD OF DELETE ON v5 BEGIN

        INSERT INTO result2(a,b) VALUES(old.x, old.b);

      END;

      DELETE FROM v5 WHERE x=5;

      SELECT * FROM result2;

   }

 } {5 504}

 do_test triggerA-2.10 {

   db eval {

      DELETE FROM result4;

      CREATE TRIGGER r5u INSTEAD OF UPDATE ON v5 BEGIN

        INSERT INTO result4(a,b,c,d) VALUES(old.x, old.b, new.x, new.b);

      END;

      UPDATE v5 SET b = b+9900000 WHERE x BETWEEN 3 AND 5;

      SELECT * FROM result4 ORDER BY a;

   }

 } {3 305 3 9900305 4 404 4 9900404 5 504 5 9900504}

 # Only run the reamining tests if memory debugging is turned on.

 #

 ifcapable !memdebug {

    puts "Skipping triggerA malloc tests: not compiled with -DSQLITE_MEMDEBUG..."

    finish_test

    return

 }

 source $testdir/malloc_common.tcl

 # Save a copy of the current database configuration.

 #

 db close

 file delete -force test.db-triggerA

 file copy test.db test.db-triggerA

 sqlite3 db test.db

 # Run malloc tests on the INSTEAD OF trigger firing.

 #

 do_malloc_test triggerA-3 -tclprep {

   db close

   file delete -force test.db test.db-journal

   file copy -force test.db-triggerA test.db

   sqlite3 db test.db

   sqlite3_extended_result_codes db 1  

   db eval {SELECT * FROM v5; -- warm up the cache}

 } -sqlbody {

    DELETE FROM v5 WHERE x=5;

    UPDATE v5 SET b=b+9900000 WHERE x BETWEEN 3 AND 5;

 }

 # Clean up the saved database copy.

 #

 file delete -force test.db-triggerA

 finish_test