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+# 2005 August 18
+#
+# 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.
+#
+# This file implements tests to increase coverage of trigger.c.
+#
+# $Id: trigger7.test,v 1.3 2008/08/11 18:44:58 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+ifcapable {!trigger} {
+  finish_test
+  return
+}
+
+
+# Error messages resulting from qualified trigger names.
+#
+do_test trigger7-1.1 {
+  execsql {
+    CREATE TABLE t1(x, y);
+  }
+  catchsql {
+    CREATE TEMP TRIGGER main.r1 AFTER INSERT ON t1 BEGIN
+      SELECT 'no nothing';
+    END
+  }
+} {1 {temporary trigger may not have qualified name}}
+do_test trigger7-1.2 {
+  catchsql {
+    CREATE TRIGGER not_a_db.r1 AFTER INSERT ON t1 BEGIN
+      SELECT 'no nothing';
+    END
+  }
+} {1 {unknown database not_a_db}}
+
+
+# When the UPDATE OF syntax is used, no code is generated for triggers
+# that do not match the update columns.
+#
+ifcapable explain {
+  do_test trigger7-2.1 {
+    execsql {
+      CREATE TRIGGER r1 AFTER UPDATE OF x ON t1 BEGIN
+        SELECT '___update_t1.x___';
+      END;
+      CREATE TRIGGER r2 AFTER UPDATE OF y ON t1 BEGIN
+        SELECT '___update_t1.y___';
+      END;
+    }
+    set txt [db eval {EXPLAIN UPDATE t1 SET x=5}]
+    string match *___update_t1.x___* $txt
+  } 1
+  do_test trigger7-2.2 {
+    set txt [db eval {EXPLAIN UPDATE t1 SET x=5}]
+    string match *___update_t1.y___* $txt
+  } 0
+  do_test trigger7-2.3 {
+    set txt [db eval {EXPLAIN UPDATE t1 SET y=5}]
+    string match *___update_t1.x___* $txt
+  } 0
+  do_test trigger7-2.4 {
+    set txt [db eval {EXPLAIN UPDATE t1 SET y=5}]
+    string match *___update_t1.y___* $txt
+  } 1
+  do_test trigger7-2.5 {
+    set txt [db eval {EXPLAIN UPDATE t1 SET rowid=5}]
+    string match *___update_t1.x___* $txt
+  } 0
+  do_test trigger7-2.6 {
+    set txt [db eval {EXPLAIN UPDATE t1 SET rowid=5}]
+    string match *___update_t1.x___* $txt
+  } 0
+}
+
+# Test the ability to create many triggers on the same table, then
+# selectively drop those triggers.
+#
+do_test trigger7-3.1 {
+  execsql {
+    CREATE TABLE t2(x,y,z);
+    CREATE TRIGGER t2r1 AFTER INSERT ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r2 BEFORE INSERT ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r3 AFTER UPDATE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r4 BEFORE UPDATE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r5 AFTER DELETE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r6 BEFORE DELETE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r7 AFTER INSERT ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r8 BEFORE INSERT ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r9 AFTER UPDATE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r10 BEFORE UPDATE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r11 AFTER DELETE ON t2 BEGIN SELECT 1; END;
+    CREATE TRIGGER t2r12 BEFORE DELETE ON t2 BEGIN SELECT 1; END;
+    DROP TRIGGER t2r6;
+  }
+} {}
+
+# This test corrupts the database file so it must be the last test
+# in the series.
+#
+do_test trigger7-99.1 {
+  execsql {
+    PRAGMA writable_schema=on;
+    UPDATE sqlite_master SET sql='nonsense';
+  }
+  db close
+  catch { sqlite3 db test.db }
+  catchsql { DROP TRIGGER t2r5 }
+} {1 {malformed database schema (t2r12) - near "nonsense": syntax error}}
+
+finish_test