Get `gn gen` to succeed on Windows

third_party/sqlite/src/test/triggerC.test

+# 2009 August 24
+#
+# 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.
+#
+#***********************************************************************
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+ifcapable {!trigger} {
+  finish_test
+  return
+}
+
+#-------------------------------------------------------------------------
+# Test organization:
+#
+# triggerC-1.*: Haphazardly designed trigger related tests that were useful
+#               during an upgrade of the triggers sub-system.
+# 
+# triggerC-2.*:
+#
+# triggerC-3.*:
+#
+# triggerC-4.*:
+#
+# triggerC-5.*: Test that when recursive triggers are enabled DELETE 
+#               triggers are fired when rows are deleted as part of OR
+#               REPLACE conflict resolution. And that they are not fired
+#               if recursive triggers are not enabled.
+#
+# triggerC-6.*: Test that the recursive_triggers pragma returns correct
+#               results when invoked without an argument.
+#
+
+# Enable recursive triggers for this file.
+#
+execsql { PRAGMA recursive_triggers = on }
+
+#sqlite3_db_config_lookaside db 0 0 0
+
+#-------------------------------------------------------------------------
+# This block of tests, triggerC-1.*, are not aimed at any specific
+# property of the triggers sub-system. They were created to debug
+# specific problems while modifying SQLite to support recursive
+# triggers. They are left here in case they can help debug the
+# same problems again.
+#
+do_test triggerC-1.1 {
+  execsql {
+    CREATE TABLE t1(a, b, c);
+    CREATE TABLE log(t, a1, b1, c1, a2, b2, c2);
+    CREATE TRIGGER trig1 BEFORE INSERT ON t1 BEGIN
+      INSERT INTO log VALUES('before', NULL, NULL, NULL, new.a, new.b, new.c);
+    END;
+    CREATE TRIGGER trig2 AFTER INSERT ON t1 BEGIN
+      INSERT INTO log VALUES('after', NULL, NULL, NULL, new.a, new.b, new.c);
+    END;
+    CREATE TRIGGER trig3 BEFORE UPDATE ON t1 BEGIN
+      INSERT INTO log VALUES('before', old.a,old.b,old.c, new.a,new.b,new.c);
+    END;
+    CREATE TRIGGER trig4 AFTER UPDATE ON t1 BEGIN
+      INSERT INTO log VALUES('after', old.a,old.b,old.c, new.a,new.b,new.c);
+    END;
+
+    CREATE TRIGGER trig5 BEFORE DELETE ON t1 BEGIN
+      INSERT INTO log VALUES('before', old.a,old.b,old.c, NULL,NULL,NULL);
+    END;
+    CREATE TRIGGER trig6 AFTER DELETE ON t1 BEGIN
+      INSERT INTO log VALUES('after', old.a,old.b,old.c, NULL,NULL,NULL);
+    END;
+  }
+} {}
+do_test triggerC-1.2 {
+  execsql {
+    INSERT INTO t1 VALUES('A', 'B', 'C');
+    SELECT * FROM log;
+  }
+} {before {} {} {} A B C after {} {} {} A B C}
+do_test triggerC-1.3 {
+  execsql { SELECT * FROM t1 }
+} {A B C}
+do_test triggerC-1.4 {
+  execsql {
+    DELETE FROM log;
+    UPDATE t1 SET a = 'a';
+    SELECT * FROM log;
+  }
+} {before A B C a B C after A B C a B C}
+do_test triggerC-1.5 {
+  execsql { SELECT * FROM t1 }
+} {a B C}
+do_test triggerC-1.6 {
+  execsql {
+    DELETE FROM log;
+    DELETE FROM t1;
+    SELECT * FROM log;
+  }
+} {before a B C {} {} {} after a B C {} {} {}}
+do_test triggerC-1.7 {
+  execsql { SELECT * FROM t1 }
+} {}
+do_test triggerC-1.8 {
+  execsql {
+    CREATE TABLE t4(a, b);
+    CREATE TRIGGER t4t AFTER DELETE ON t4 BEGIN
+      SELECT RAISE(ABORT, 'delete is not supported');
+    END;
+  }
+} {}
+do_test triggerC-1.9 {
+  execsql { INSERT INTO t4 VALUES(1, 2) }
+  catchsql { DELETE FROM t4 }
+} {1 {delete is not supported}}
+do_test triggerC-1.10 {
+  execsql { SELECT * FROM t4 }
+} {1 2}
+do_test triggerC-1.11 {
+  execsql {
+    CREATE TABLE t5 (a primary key, b, c);
+    INSERT INTO t5 values (1, 2, 3);
+    CREATE TRIGGER au_tbl AFTER UPDATE ON t5 BEGIN
+      UPDATE OR IGNORE t5 SET a = new.a, c = 10;
+    END;
+  }
+} {}
+do_test triggerC-1.12 {
+  catchsql { UPDATE OR REPLACE t5 SET a = 4 WHERE a = 1 }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-1.13 {
+  execsql {
+    CREATE TABLE t6(a INTEGER PRIMARY KEY, b);
+    INSERT INTO t6 VALUES(1, 2);
+    create trigger r1 after update on t6 for each row begin
+      SELECT 1;
+    end;
+    UPDATE t6 SET a=a; 
+  }
+} {}
+do_test triggerC-1.14 {
+  execsql {
+    DROP TABLE t1;
+    CREATE TABLE cnt(n);
+    INSERT INTO cnt VALUES(0);
+    CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE, c, d, e);
+    CREATE INDEX t1cd ON t1(c,d);
+    CREATE TRIGGER t1r1 AFTER UPDATE ON t1 BEGIN UPDATE cnt SET n=n+1; END;
+    INSERT INTO t1 VALUES(1,2,3,4,5);
+    INSERT INTO t1 VALUES(6,7,8,9,10);
+    INSERT INTO t1 VALUES(11,12,13,14,15);
+  }
+} {}
+do_test triggerC-1.15 {
+  catchsql { UPDATE OR ROLLBACK t1 SET a=100 }
+} {1 {PRIMARY KEY must be unique}}
+
+
+#-------------------------------------------------------------------------
+# This block of tests, triggerC-2.*, tests that recursive trigger
+# programs (triggers that fire themselves) work. More specifically,
+# this block focuses on recursive INSERT triggers.
+#
+do_test triggerC-2.1.0 {
+  execsql {
+    CREATE TABLE t2(a PRIMARY KEY);
+  }
+} {}
+
+foreach {n tdefn rc} {
+  1 { 
+    CREATE TRIGGER t2_trig AFTER INSERT ON t2 WHEN (new.a>0) BEGIN
+      INSERT INTO t2 VALUES(new.a - 1);
+    END; 
+  } {0 {10 9 8 7 6 5 4 3 2 1 0}}
+
+  2 {
+    CREATE TRIGGER t2_trig AFTER INSERT ON t2 BEGIN
+      SELECT CASE WHEN new.a==2 THEN RAISE(IGNORE) ELSE NULL END;
+      INSERT INTO t2 VALUES(new.a - 1);
+    END;
+  } {0 {10 9 8 7 6 5 4 3 2}}
+
+  3 { 
+    CREATE TRIGGER t2_trig BEFORE INSERT ON t2 WHEN (new.a>0) BEGIN
+      INSERT INTO t2 VALUES(new.a - 1);
+    END; 
+  } {0 {0 1 2 3 4 5 6 7 8 9 10}}
+
+  4 { 
+    CREATE TRIGGER t2_trig BEFORE INSERT ON t2 BEGIN
+      SELECT CASE WHEN new.a==2 THEN RAISE(IGNORE) ELSE NULL END;
+      INSERT INTO t2 VALUES(new.a - 1);
+    END;
+  } {0 {3 4 5 6 7 8 9 10}}
+
+  5 { 
+    CREATE TRIGGER t2_trig BEFORE INSERT ON t2 BEGIN
+      INSERT INTO t2 VALUES(new.a - 1);
+    END;
+  } {1 {too many levels of trigger recursion}}
+
+  6 { 
+    CREATE TRIGGER t2_trig AFTER INSERT ON t2 WHEN (new.a>0) BEGIN
+      INSERT OR IGNORE INTO t2 VALUES(new.a);
+    END;
+  } {0 10}
+
+  7 { 
+    CREATE TRIGGER t2_trig BEFORE INSERT ON t2 WHEN (new.a>0) BEGIN
+      INSERT OR IGNORE INTO t2 VALUES(new.a);
+    END;
+  } {1 {too many levels of trigger recursion}}
+} {
+  do_test triggerC-2.1.$n {
+    catchsql { DROP TRIGGER t2_trig }
+    execsql  { DELETE FROM t2 }
+    execsql  $tdefn
+    catchsql {
+      INSERT INTO t2 VALUES(10);
+      SELECT * FROM t2;
+    }
+  } $rc
+}
+
+do_test triggerC-2.2 {
+  execsql {
+    CREATE TABLE t22(x);
+
+    CREATE TRIGGER t22a AFTER INSERT ON t22 BEGIN
+      INSERT INTO t22 SELECT x + (SELECT max(x) FROM t22) FROM t22;
+    END;
+    CREATE TRIGGER t22b BEFORE INSERT ON t22 BEGIN
+      SELECT CASE WHEN (SELECT count(*) FROM t22) >= 100
+                  THEN RAISE(IGNORE)
+                  ELSE NULL END;
+    END;
+
+    INSERT INTO t22 VALUES(1);
+    SELECT count(*) FROM t22;
+  }
+} {100}
+
+do_test triggerC-2.3 {
+  execsql {
+    CREATE TABLE t23(x PRIMARY KEY);
+
+    CREATE TRIGGER t23a AFTER INSERT ON t23 BEGIN
+      INSERT INTO t23 VALUES(new.x + 1);
+    END;
+
+    CREATE TRIGGER t23b BEFORE INSERT ON t23 BEGIN
+      SELECT CASE WHEN new.x>500
+                  THEN RAISE(IGNORE)
+                  ELSE NULL END;
+    END;
+
+    INSERT INTO t23 VALUES(1);
+    SELECT count(*) FROM t23;
+  }
+} {500}
+ 
+
+#-----------------------------------------------------------------------
+# This block of tests, triggerC-3.*, test that SQLite throws an exception
+# when it detects excessive recursion.
+#
+do_test triggerC-3.1.1 {
+  execsql {
+    CREATE TABLE t3(a, b);
+    CREATE TRIGGER t3i AFTER INSERT ON t3 BEGIN
+      DELETE FROM t3 WHERE rowid = new.rowid;
+    END;
+    CREATE TRIGGER t3d AFTER DELETE ON t3 BEGIN
+      INSERT INTO t3 VALUES(old.a, old.b);
+    END;
+  }
+} {}
+do_test triggerC-3.1.2 {
+  catchsql { INSERT INTO t3 VALUES(0,0) }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.1.3 {
+  execsql { SELECT * FROM t3 }
+} {}
+
+do_test triggerC-3.2.1 {
+  execsql {
+    CREATE TABLE t3b(x);
+    CREATE TRIGGER t3bi AFTER INSERT ON t3b WHEN new.x<2000 BEGIN
+      INSERT INTO t3b VALUES(new.x+1);
+    END;
+  }
+  catchsql {
+    INSERT INTO t3b VALUES(1);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.2.2 {
+  db eval {SELECT * FROM t3b}
+} {}
+
+do_test triggerC-3.3.1 {
+  catchsql {
+    INSERT INTO t3b VALUES(1001);
+  }
+} {0 {}}
+do_test triggerC-3.3.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {1000 2000 1001}
+
+do_test triggerC-3.4.1 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(999);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.4.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+
+do_test triggerC-3.5.1 {
+  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 100
+  catchsql {
+    INSERT INTO t3b VALUES(1901);
+  }
+} {0 {}}
+do_test triggerC-3.5.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {100 2000 1901}
+
+do_test triggerC-3.5.3 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(1900);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.5.4 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+
+do_test triggerC-3.6.1 {
+  sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1
+  catchsql {
+    INSERT INTO t3b VALUES(2000);
+  }
+} {0 {}}
+do_test triggerC-3.6.2 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {1 2000 2000}
+
+do_test triggerC-3.6.3 {
+  catchsql {
+    DELETE FROM t3b;
+    INSERT INTO t3b VALUES(1999);
+  }
+} {1 {too many levels of trigger recursion}}
+do_test triggerC-3.6.4 {
+  db eval {SELECT count(*), max(x), min(x) FROM t3b}
+} {0 {} {}}
+sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000
+      
+
+#-----------------------------------------------------------------------
+# This next block of tests, triggerC-4.*, checks that affinity 
+# transformations and constraint processing is performed at the correct 
+# times relative to BEFORE and AFTER triggers.
+#
+# For an INSERT statement, for each row to be inserted:
+#
+#   1. Apply affinities to non-rowid values to be inserted.
+#   2. Fire BEFORE triggers.
+#   3. Process constraints.
+#   4. Insert new record.
+#   5. Fire AFTER triggers.
+#
+# If the value of the rowid field is to be automatically assigned, it is
+# set to -1 in the new.* record. Even if it is explicitly set to NULL
+# by the INSERT statement.
+#
+# For an UPDATE statement, for each row to be deleted:
+#
+#   1. Apply affinities to non-rowid values to be inserted.
+#   2. Fire BEFORE triggers.
+#   3. Process constraints.
+#   4. Insert new record.
+#   5. Fire AFTER triggers.
+#
+# For a DELETE statement, for each row to be deleted:
+#
+#   1. Fire BEFORE triggers.
+#   2. Remove database record.
+#   3. Fire AFTER triggers.
+#
+# When a numeric value that as an exact integer representation is stored
+# in a column with REAL affinity, it is actually stored as an integer.
+# These tests check that the typeof() such values is always 'real',
+# not 'integer'.
+#
+# triggerC-4.1.*: Check that affinity transformations are made before
+#                 triggers are invoked.
+#
+do_test triggerC-4.1.1 {
+  catchsql { DROP TABLE log }
+  catchsql { DROP TABLE t4 }
+  execsql {
+    CREATE TABLE log(t);
+    CREATE TABLE t4(a TEXT,b INTEGER,c REAL);
+    CREATE TRIGGER t4bi BEFORE INSERT ON t4 BEGIN
+      INSERT INTO log VALUES(new.rowid || ' ' || typeof(new.rowid) || ' ' ||
+                             new.a     || ' ' || typeof(new.a)     || ' ' ||
+                             new.b     || ' ' || typeof(new.b)     || ' ' ||
+                             new.c     || ' ' || typeof(new.c)
+      );
+    END;
+    CREATE TRIGGER t4ai AFTER INSERT ON t4 BEGIN
+      INSERT INTO log VALUES(new.rowid || ' ' || typeof(new.rowid) || ' ' ||
+                             new.a     || ' ' || typeof(new.a)     || ' ' ||
+                             new.b     || ' ' || typeof(new.b)     || ' ' ||
+                             new.c     || ' ' || typeof(new.c)
+      );
+    END;
+    CREATE TRIGGER t4bd BEFORE DELETE ON t4 BEGIN
+      INSERT INTO log VALUES(old.rowid || ' ' || typeof(old.rowid) || ' ' ||
+                             old.a     || ' ' || typeof(old.a)     || ' ' ||
+                             old.b     || ' ' || typeof(old.b)     || ' ' ||
+                             old.c     || ' ' || typeof(old.c)
+      );
+    END;
+    CREATE TRIGGER t4ad AFTER DELETE ON t4 BEGIN
+      INSERT INTO log VALUES(old.rowid || ' ' || typeof(old.rowid) || ' ' ||
+                             old.a     || ' ' || typeof(old.a)     || ' ' ||
+                             old.b     || ' ' || typeof(old.b)     || ' ' ||
+                             old.c     || ' ' || typeof(old.c)
+      );
+    END;
+    CREATE TRIGGER t4bu BEFORE UPDATE ON t4 BEGIN
+      INSERT INTO log VALUES(old.rowid || ' ' || typeof(old.rowid) || ' ' ||
+                             old.a     || ' ' || typeof(old.a)     || ' ' ||
+                             old.b     || ' ' || typeof(old.b)     || ' ' ||
+                             old.c     || ' ' || typeof(old.c)
+      );
+      INSERT INTO log VALUES(new.rowid || ' ' || typeof(new.rowid) || ' ' ||
+                             new.a     || ' ' || typeof(new.a)     || ' ' ||
+                             new.b     || ' ' || typeof(new.b)     || ' ' ||
+                             new.c     || ' ' || typeof(new.c)
+      );
+    END;
+    CREATE TRIGGER t4au AFTER UPDATE ON t4 BEGIN
+      INSERT INTO log VALUES(old.rowid || ' ' || typeof(old.rowid) || ' ' ||
+                             old.a     || ' ' || typeof(old.a)     || ' ' ||
+                             old.b     || ' ' || typeof(old.b)     || ' ' ||
+                             old.c     || ' ' || typeof(old.c)
+      );
+      INSERT INTO log VALUES(new.rowid || ' ' || typeof(new.rowid) || ' ' ||
+                             new.a     || ' ' || typeof(new.a)     || ' ' ||
+                             new.b     || ' ' || typeof(new.b)     || ' ' ||
+                             new.c     || ' ' || typeof(new.c)
+      );
+    END;
+  }
+} {}
+foreach {n insert log} {
+
+  2 { 
+   INSERT INTO t4 VALUES('1', '1', '1');
+   DELETE FROM t4;
+  } {
+    -1 integer 1 text 1 integer 1.0 real 
+     1 integer 1 text 1 integer 1.0 real
+     1 integer 1 text 1 integer 1.0 real 
+     1 integer 1 text 1 integer 1.0 real
+  }
+
+  3 { 
+   INSERT INTO t4(rowid,a,b,c) VALUES(45, 45, 45, 45);
+   DELETE FROM t4;
+  } {
+    45 integer 45 text 45 integer 45.0 real
+    45 integer 45 text 45 integer 45.0 real
+    45 integer 45 text 45 integer 45.0 real
+    45 integer 45 text 45 integer 45.0 real
+  }
+
+  4 { 
+   INSERT INTO t4(rowid,a,b,c) VALUES(-42.0, -42.0, -42.0, -42.0);
+   DELETE FROM t4;
+  } {
+    -42 integer -42.0 text -42 integer -42.0 real 
+    -42 integer -42.0 text -42 integer -42.0 real
+    -42 integer -42.0 text -42 integer -42.0 real 
+    -42 integer -42.0 text -42 integer -42.0 real
+  }
+
+  5 { 
+   INSERT INTO t4(rowid,a,b,c) VALUES(NULL, -42.4, -42.4, -42.4);
+   DELETE FROM t4;
+  } {
+    -1 integer -42.4 text -42.4 real -42.4 real
+     1 integer -42.4 text -42.4 real -42.4 real
+     1 integer -42.4 text -42.4 real -42.4 real
+     1 integer -42.4 text -42.4 real -42.4 real
+  }
+
+  6 { 
+   INSERT INTO t4 VALUES(7, 7, 7);
+   UPDATE t4 SET a=8, b=8, c=8;
+  } {
+    -1 integer 7 text 7 integer 7.0 real
+     1 integer 7 text 7 integer 7.0 real
+     1 integer 7 text 7 integer 7.0 real
+     1 integer 8 text 8 integer 8.0 real
+     1 integer 7 text 7 integer 7.0 real
+     1 integer 8 text 8 integer 8.0 real
+  }
+
+  7 { 
+   UPDATE t4 SET rowid=2;
+  } {
+     1 integer 8 text 8 integer 8.0 real
+     2 integer 8 text 8 integer 8.0 real
+     1 integer 8 text 8 integer 8.0 real
+     2 integer 8 text 8 integer 8.0 real
+  }
+
+  8 { 
+   UPDATE t4 SET a='9', b='9', c='9';
+  } {
+     2 integer 8 text 8 integer 8.0 real
+     2 integer 9 text 9 integer 9.0 real
+     2 integer 8 text 8 integer 8.0 real
+     2 integer 9 text 9 integer 9.0 real
+  }
+
+  9 { 
+   UPDATE t4 SET a='9.1', b='9.1', c='9.1';
+  } {
+     2 integer 9   text 9   integer 9.0 real
+     2 integer 9.1 text 9.1 real    9.1 real
+     2 integer 9   text 9   integer 9.0 real
+     2 integer 9.1 text 9.1 real    9.1 real
+  }
+} {
+  do_test triggerC-4.1.$n {
+    eval concat [execsql " 
+      DELETE FROM log;
+      $insert ; 
+      SELECT * FROM log;
+    "]
+  } [join $log " "]
+} 
+
+#-------------------------------------------------------------------------
+# This block of tests, triggerC-5.*, test that DELETE triggers are fired
+# if a row is deleted as a result of OR REPLACE conflict resolution.
+#
+do_test triggerC-5.1.0 {
+  execsql {
+    DROP TABLE IF EXISTS t5;
+    CREATE TABLE t5(a INTEGER PRIMARY KEY, b);
+    CREATE UNIQUE INDEX t5i ON t5(b);
+    INSERT INTO t5 VALUES(1, 'a');
+    INSERT INTO t5 VALUES(2, 'b');
+    INSERT INTO t5 VALUES(3, 'c');
+
+    CREATE TABLE t5g(a, b, c);
+    CREATE TRIGGER t5t BEFORE DELETE ON t5 BEGIN
+      INSERT INTO t5g VALUES(old.a, old.b, (SELECT count(*) FROM t5));
+    END;
+  }
+} {}
+foreach {n dml t5g t5} {
+  1 "DELETE FROM t5 WHERE a=2"                        {2 b 3} {1 a 3 c}
+  2 "INSERT OR REPLACE INTO t5 VALUES(2, 'd')"        {2 b 3} {1 a 2 d 3 c}
+  3 "UPDATE OR REPLACE t5 SET a = 2 WHERE a = 3"      {2 b 3} {1 a 2 c}
+  4 "INSERT OR REPLACE INTO t5 VALUES(4, 'b')"        {2 b 3} {1 a 3 c 4 b}
+  5 "UPDATE OR REPLACE t5 SET b = 'b' WHERE b = 'c'"  {2 b 3} {1 a 3 b}
+  6 "INSERT OR REPLACE INTO t5 VALUES(2, 'c')"        {2 b 3 3 c 2} {1 a 2 c}
+  7 "UPDATE OR REPLACE t5 SET a=1, b='b' WHERE a = 3" {1 a 3 2 b 2} {1 b}
+} {
+  do_test triggerC-5.1.$n {
+    execsql "
+      BEGIN;
+        $dml ;
+        SELECT * FROM t5g;
+        SELECT * FROM t5;
+      ROLLBACK;
+    "
+  } [concat $t5g $t5]
+}
+do_test triggerC-5.2.0 {
+  execsql {
+    DROP TRIGGER t5t;
+    CREATE TRIGGER t5t AFTER DELETE ON t5 BEGIN
+      INSERT INTO t5g VALUES(old.a, old.b, (SELECT count(*) FROM t5));
+    END;
+  }
+} {}
+foreach {n dml t5g t5} {
+  1 "DELETE FROM t5 WHERE a=2"                        {2 b 2} {1 a 3 c}
+  2 "INSERT OR REPLACE INTO t5 VALUES(2, 'd')"        {2 b 2} {1 a 2 d 3 c}
+  3 "UPDATE OR REPLACE t5 SET a = 2 WHERE a = 3"      {2 b 2} {1 a 2 c}
+  4 "INSERT OR REPLACE INTO t5 VALUES(4, 'b')"        {2 b 2} {1 a 3 c 4 b}
+  5 "UPDATE OR REPLACE t5 SET b = 'b' WHERE b = 'c'"  {2 b 2} {1 a 3 b}
+  6 "INSERT OR REPLACE INTO t5 VALUES(2, 'c')"        {2 b 2 3 c 1} {1 a 2 c}
+  7 "UPDATE OR REPLACE t5 SET a=1, b='b' WHERE a = 3" {1 a 2 2 b 1} {1 b}
+} {
+  do_test triggerC-5.2.$n {
+    execsql "
+      BEGIN;
+        $dml ;
+        SELECT * FROM t5g;
+        SELECT * FROM t5;
+      ROLLBACK;
+    "
+  } [concat $t5g $t5]
+}
+do_test triggerC-5.3.0 {
+  execsql { PRAGMA recursive_triggers = off }
+} {}
+foreach {n dml t5g t5} {
+  1 "DELETE FROM t5 WHERE a=2"                        {2 b 2} {1 a 3 c}
+  2 "INSERT OR REPLACE INTO t5 VALUES(2, 'd')"        {} {1 a 2 d 3 c}
+  3 "UPDATE OR REPLACE t5 SET a = 2 WHERE a = 3"      {} {1 a 2 c}
+  4 "INSERT OR REPLACE INTO t5 VALUES(4, 'b')"        {} {1 a 3 c 4 b}
+  5 "UPDATE OR REPLACE t5 SET b = 'b' WHERE b = 'c'"  {} {1 a 3 b}
+  6 "INSERT OR REPLACE INTO t5 VALUES(2, 'c')"        {} {1 a 2 c}
+  7 "UPDATE OR REPLACE t5 SET a=1, b='b' WHERE a = 3" {} {1 b}
+} {
+  do_test triggerC-5.3.$n {
+    execsql "
+      BEGIN;
+        $dml ;
+        SELECT * FROM t5g;
+        SELECT * FROM t5;
+      ROLLBACK;
+    "
+  } [concat $t5g $t5]
+}
+do_test triggerC-5.3.8 {
+  execsql { PRAGMA recursive_triggers = on }
+} {}
+
+#-------------------------------------------------------------------------
+# This block of tests, triggerC-6.*, tests that "PRAGMA recursive_triggers"
+# statements return the current value of the recursive triggers flag.
+#
+do_test triggerC-6.1 {
+  execsql { PRAGMA recursive_triggers }
+} {1}
+do_test triggerC-6.2 {
+  execsql { 
+    PRAGMA recursive_triggers = off;
+    PRAGMA recursive_triggers;
+  }
+} {0}
+do_test triggerC-6.3 {
+  execsql { 
+    PRAGMA recursive_triggers = on;
+    PRAGMA recursive_triggers;
+  }
+} {1}
+
+#-------------------------------------------------------------------------
+# Test some of the "undefined behaviour" associated with triggers. The
+# undefined behaviour occurs when a row being updated or deleted is 
+# manipulated by a BEFORE trigger.
+# 
+do_test triggerC-7.1 {
+  execsql {
+    CREATE TABLE t8(x);
+    CREATE TABLE t7(a, b);
+    INSERT INTO t7 VALUES(1, 2);
+    INSERT INTO t7 VALUES(3, 4);
+    INSERT INTO t7 VALUES(5, 6);
+    CREATE TRIGGER t7t BEFORE UPDATE ON t7 BEGIN
+      DELETE FROM t7 WHERE a = 1;
+    END;
+    CREATE TRIGGER t7ta AFTER UPDATE ON t7 BEGIN
+      INSERT INTO t8 VALUES('after fired ' || old.rowid || '->' || new.rowid);
+    END;
+  }
+} {}
+do_test triggerC-7.2 {
+  execsql {
+    BEGIN;
+      UPDATE t7 SET b=7 WHERE a = 5;
+      SELECT * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {3 4 5 7 {after fired 3->3}}
+do_test triggerC-7.3 {
+  execsql {
+    BEGIN;
+      UPDATE t7 SET b=7 WHERE a = 1;
+      SELECT * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {3 4 5 6}
+
+do_test triggerC-7.4 {
+  execsql {
+    DROP TRIGGER t7t;
+    CREATE TRIGGER t7t BEFORE UPDATE ON t7 WHEN (old.rowid!=1 OR new.rowid!=8)
+    BEGIN
+      UPDATE t7 set rowid = 8 WHERE rowid=1;
+    END;
+  }
+} {}
+do_test triggerC-7.5 {
+  execsql {
+    BEGIN;
+      UPDATE t7 SET b=7 WHERE a = 5;
+      SELECT rowid, * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {2 3 4 3 5 7 8 1 2 {after fired 1->8} {after fired 3->3}}
+do_test triggerC-7.6 {
+  execsql {
+    BEGIN;
+      UPDATE t7 SET b=7 WHERE a = 1;
+      SELECT rowid, * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {2 3 4 3 5 6 8 1 2 {after fired 1->8}}
+
+do_test triggerC-7.7 {
+  execsql {
+    DROP TRIGGER t7t;
+    DROP TRIGGER t7ta;
+    CREATE TRIGGER t7t BEFORE DELETE ON t7 BEGIN
+      UPDATE t7 set rowid = 8 WHERE rowid=1;
+    END;
+    CREATE TRIGGER t7ta AFTER DELETE ON t7 BEGIN
+      INSERT INTO t8 VALUES('after fired ' || old.rowid);
+    END;
+  }
+} {}
+do_test triggerC-7.8 {
+  execsql {
+    BEGIN;
+      DELETE FROM t7 WHERE a = 3;
+      SELECT rowid, * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {3 5 6 8 1 2 {after fired 2}}
+do_test triggerC-7.9 {
+  execsql {
+    BEGIN;
+      DELETE FROM t7 WHERE a = 1;
+      SELECT rowid, * FROM t7;
+      SELECT * FROM t8;
+    ROLLBACK;
+  }
+} {2 3 4 3 5 6 8 1 2}
+
+# Ticket [e25d9ea771febc9c311928c1c01c3163dcb26643]
+# 
+do_test triggerC-9.1 {
+  execsql {
+    CREATE TABLE t9(a,b);
+    CREATE INDEX t9b ON t9(b);
+    INSERT INTO t9 VALUES(1,0);
+    INSERT INTO t9 VALUES(2,1);
+    INSERT INTO t9 VALUES(3,2);
+    INSERT INTO t9 SELECT a+3, a+2 FROM t9;
+    INSERT INTO t9 SELECT a+6, a+5 FROM t9;
+    SELECT a FROM t9 ORDER BY a;
+  }
+} {1 2 3 4 5 6 7 8 9 10 11 12}
+do_test triggerC-9.2 {
+  execsql {
+    CREATE TRIGGER t9r1 AFTER DELETE ON t9 BEGIN
+      DELETE FROM t9 WHERE b=old.a;
+    END;
+    DELETE FROM t9 WHERE b=4;
+    SELECT a FROM t9 ORDER BY a;
+  }
+} {1 2 3 4}
+
+# At one point (between versions 3.6.18 and 3.6.20 inclusive), an UPDATE 
+# that fired a BEFORE trigger that itself updated the same row as the 
+# statement causing it to fire was causing a strange side-effect: The 
+# values updated by the statement within the trigger were being overwritten 
+# by the values in the new.* array, even if those values were not 
+# themselves written by the parent UPDATE statement.
+#
+# Technically speaking this was not a bug. The SQLite documentation says
+# that if a BEFORE UPDATE or BEFORE DELETE trigger modifies or deletes the
+# row that the parent statement is operating on the results are undefined. 
+# But as of 3.6.21 behaviour is restored to the way it was in versions
+# 3.6.17 and earlier to avoid causing unnecessary difficulties.
+#
+do_test triggerC-10.1 {
+  execsql {
+    CREATE TABLE t10(a, updatecnt DEFAULT 0);
+    CREATE TRIGGER t10_bu BEFORE UPDATE OF a ON t10 BEGIN
+      UPDATE t10 SET updatecnt = updatecnt+1 WHERE rowid = old.rowid;
+    END;
+    INSERT INTO t10(a) VALUES('hello');
+  }
+
+  # Before the problem was fixed, table t10 would contain the tuple 
+  # (world, 0) after running the following script (because the value
+  # 1 written to column "updatecnt" was clobbered by the old value 0).
+  #
+  execsql {
+    UPDATE t10 SET a = 'world';
+    SELECT * FROM t10;
+  }
+} {world 1}
+
+do_test triggerC-10.2 {
+  execsql {
+    UPDATE t10 SET a = 'tcl', updatecnt = 5;
+    SELECT * FROM t10;
+  }
+} {tcl 5}
+
+do_test triggerC-10.3 {
+  execsql {
+    CREATE TABLE t11(
+      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
+    );
+
+    CREATE TRIGGER t11_bu BEFORE UPDATE OF c1 ON t11 BEGIN
+      UPDATE t11 SET c31 = c31+1, c32=c32+1 WHERE rowid = old.rowid;
+    END;
+
+    INSERT INTO t11 VALUES(
+      1,   2,  3,  4,  5,  6,  7,  8,  9, 10,
+      11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
+      21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
+      31, 32, 33, 34, 35, 36, 37, 38, 39, 40
+    );
+  }
+
+  # Before the problem was fixed, table t10 would contain the tuple 
+  # (world, 0) after running the following script (because the value
+  # 1 written to column "updatecnt" was clobbered by the old value 0).
+  #
+  execsql {
+    UPDATE t11 SET c4=35, c33=22, c1=5;
+    SELECT * FROM t11;
+  } 
+} {5 2 3 35 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 22 34 35 36 37 38 39 40}
+
+#-------------------------------------------------------------------------
+# Test that bug [371bab5d65] has been fixed. BEFORE INSERT and INSTEAD OF
+# INSERT triggers with the DEFAULT VALUES INSERT syntax.
+#
+do_test triggerC-11.0 {
+  catchsql { DROP TABLE log }
+  execsql  { CREATE TABLE log(a, b) }
+} {}
+
+foreach {testno tbl defaults} {
+  1 "CREATE TABLE t1(a, b)"                          {{} {}}
+  2 "CREATE TABLE t1(a DEFAULT 1, b DEFAULT 'abc')"  {1 abc}
+  3 "CREATE TABLE t1(a, b DEFAULT 4.5)"              {{} 4.5}
+} {
+  do_test triggerC-11.$testno.1 {
+    catchsql { DROP TABLE t1 }
+    execsql { DELETE FROM log }
+    execsql $tbl
+    execsql {
+      CREATE TRIGGER tt1 BEFORE INSERT ON t1 BEGIN 
+        INSERT INTO log VALUES(new.a, new.b);
+      END;
+      INSERT INTO t1 DEFAULT VALUES;
+      SELECT * FROM log;
+    }
+  } $defaults
+
+  do_test triggerC-11.$testno.2 {
+    execsql { DELETE FROM log }
+    execsql {
+      CREATE TRIGGER tt2 AFTER INSERT ON t1 BEGIN 
+        INSERT INTO log VALUES(new.a, new.b);
+      END;
+      INSERT INTO t1 DEFAULT VALUES;
+      SELECT * FROM log;
+    }
+  } [concat $defaults $defaults]
+
+  do_test triggerC-11.$testno.3 {
+    execsql { DROP TRIGGER tt1 }
+    execsql { DELETE FROM log }
+    execsql {
+      INSERT INTO t1 DEFAULT VALUES;
+      SELECT * FROM log;
+    }
+  } $defaults
+} 
+do_test triggerC-11.4 {
+  catchsql { DROP TABLE t2 }
+  execsql {
+    DELETE FROM log;
+    CREATE TABLE t2(a, b);
+    CREATE VIEW v2 AS SELECT * FROM t2;
+    CREATE TRIGGER tv2 INSTEAD OF INSERT ON v2 BEGIN
+      INSERT INTO log VALUES(new.a, new.b);
+    END;
+    INSERT INTO v2 DEFAULT VALUES;
+    SELECT a, b, a IS NULL, b IS NULL FROM log;
+  }
+} {{} {} 1 1}
+
+do_test triggerC-12.1 {
+  db close
+  file delete -force test.db
+  sqlite3 db test.db
+
+  execsql {
+    CREATE TABLE t1(a, b);
+    INSERT INTO t1 VALUES(1, 2);
+    INSERT INTO t1 VALUES(3, 4);
+    INSERT INTO t1 VALUES(5, 6);
+    CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN SELECT 1 ; END ;
+    SELECT count(*) FROM sqlite_master;
+  }
+} {2}
+do_test triggerC-12.2 {
+  db eval { SELECT * FROM t1 } {
+    if {$a == 3} { execsql { DROP TRIGGER tr1 } }
+  }
+  execsql { SELECT count(*) FROM sqlite_master }
+} {1}
+
+do_execsql_test triggerC-13.1 {
+  PRAGMA recursive_triggers = ON;
+  CREATE TABLE t12(a, b);
+  INSERT INTO t12 VALUES(1, 2);
+  CREATE TRIGGER tr12 AFTER UPDATE ON t12 BEGIN
+    UPDATE t12 SET a=new.a+1, b=new.b+1;
+  END;
+} {}
+do_catchsql_test triggerC-13.2 {
+  UPDATE t12 SET a=a+1, b=b+1;
+} {1 {too many levels of trigger recursion}}
+
+
+
+finish_test