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+# 2008 January 1
+#
+# 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 some compiler optimizations for SQL statements featuring
+# triggers:
+#
+#
+#
+
+# trigger9-1.* - Test that if there are no references to OLD.* cols, or a
+# reference to only OLD.rowid, the data is not loaded.
+#
+# trigger9-2.* - Test that for NEW.* records populated by UPDATE
+# statements, unused fields are populated with NULL values.
+#
+# trigger9-3.* - Test that the temporary tables used for OLD.* references
+# in "INSTEAD OF" triggers have NULL values in unused
+# fields.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+ifcapable {!trigger} {
+ finish_test
+ return
+}
+set ::testprefix trigger9
+
+proc has_rowdata {sql} {
+ expr {[lsearch [execsql "explain $sql"] RowData]>=0}
+}
+
+do_test trigger9-1.1 {
+ execsql {
+ PRAGMA page_size = 1024;
+ CREATE TABLE t1(x, y, z);
+ INSERT INTO t1 VALUES('1', randstr(10000,10000), '2');
+ INSERT INTO t1 VALUES('2', randstr(10000,10000), '4');
+ INSERT INTO t1 VALUES('3', randstr(10000,10000), '6');
+ CREATE TABLE t2(x);
+ }
+} {}
+
+do_test trigger9-1.2.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE DELETE ON t1 BEGIN
+ INSERT INTO t2 VALUES(old.rowid);
+ END;
+ DELETE FROM t1;
+ SELECT * FROM t2;
+ }
+} {1 2 3}
+do_test trigger9-1.2.3 {
+ has_rowdata {DELETE FROM t1}
+} 0
+do_test trigger9-1.2.4 { execsql { ROLLBACK } } {}
+
+do_test trigger9-1.3.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE DELETE ON t1 BEGIN
+ INSERT INTO t2 VALUES(old.x);
+ END;
+ DELETE FROM t1;
+ SELECT * FROM t2;
+ }
+} {1 2 3}
+do_test trigger9-1.3.2 {
+ has_rowdata {DELETE FROM t1}
+} 0
+do_test trigger9-1.3.3 { execsql { ROLLBACK } } {}
+
+do_test trigger9-1.4.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE DELETE ON t1 WHEN old.x='1' BEGIN
+ INSERT INTO t2 VALUES(old.rowid);
+ END;
+ DELETE FROM t1;
+ SELECT * FROM t2;
+ }
+} {1}
+do_test trigger9-1.4.2 {
+ has_rowdata {DELETE FROM t1}
+} 0
+do_test trigger9-1.4.3 { execsql { ROLLBACK } } {}
+
+do_test trigger9-1.5.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE UPDATE ON t1 BEGIN
+ INSERT INTO t2 VALUES(old.rowid);
+ END;
+ UPDATE t1 SET y = '';
+ SELECT * FROM t2;
+ }
+} {1 2 3}
+do_test trigger9-1.5.2 {
+ has_rowdata {UPDATE t1 SET y = ''}
+} 0
+do_test trigger9-1.5.3 { execsql { ROLLBACK } } {}
+
+do_test trigger9-1.6.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE UPDATE ON t1 BEGIN
+ INSERT INTO t2 VALUES(old.x);
+ END;
+ UPDATE t1 SET y = '';
+ SELECT * FROM t2;
+ }
+} {1 2 3}
+do_test trigger9-1.6.2 {
+ has_rowdata {UPDATE t1 SET y = ''}
+} 0
+do_test trigger9-1.6.3 { execsql { ROLLBACK } } {}
+
+do_test trigger9-1.7.1 {
+ execsql {
+ BEGIN;
+ CREATE TRIGGER trig1 BEFORE UPDATE ON t1 WHEN old.x>='2' BEGIN
+ INSERT INTO t2 VALUES(old.x);
+ END;
+ UPDATE t1 SET y = '';
+ SELECT * FROM t2;
+ }
+} {2 3}
+do_test trigger9-1.7.2 {
+ has_rowdata {UPDATE t1 SET y = ''}
+} 0
+do_test trigger9-1.7.3 { execsql { ROLLBACK } } {}
+
+do_test trigger9-3.1 {
+ execsql {
+ CREATE TABLE t3(a, b);
+ INSERT INTO t3 VALUES(1, 'one');
+ INSERT INTO t3 VALUES(2, 'two');
+ INSERT INTO t3 VALUES(3, 'three');
+ }
+} {}
+do_test trigger9-3.2 {
+ execsql {
+ BEGIN;
+ CREATE VIEW v1 AS SELECT * FROM t3;
+ CREATE TRIGGER trig1 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO t2 VALUES(old.a);
+ END;
+ UPDATE v1 SET b = 'hello';
+ SELECT * FROM t2;
+ ROLLBACK;
+ }
+} {1 2 3}
+do_test trigger9-3.3 {
+ # In this test the 'c' column of the view is not required by
+ # the INSTEAD OF trigger, but the expression is reused internally as
+ # part of the view's WHERE clause. Check that this does not cause
+ # a problem.
+ #
+ execsql {
+ BEGIN;
+ CREATE VIEW v1 AS SELECT a, b AS c FROM t3 WHERE c > 'one';
+ CREATE TRIGGER trig1 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO t2 VALUES(old.a);
+ END;
+ UPDATE v1 SET c = 'hello';
+ SELECT * FROM t2;
+ ROLLBACK;
+ }
+} {2 3}
+do_test trigger9-3.4 {
+ execsql {
+ BEGIN;
+ INSERT INTO t3 VALUES(3, 'three');
+ INSERT INTO t3 VALUES(3, 'four');
+ CREATE VIEW v1 AS SELECT DISTINCT a, b FROM t3;
+ CREATE TRIGGER trig1 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO t2 VALUES(old.a);
+ END;
+ UPDATE v1 SET b = 'hello';
+ SELECT * FROM t2;
+ ROLLBACK;
+ }
+} {1 2 3 3}
+
+ifcapable compound {
+ do_test trigger9-3.5 {
+ execsql {
+ BEGIN;
+ INSERT INTO t3 VALUES(1, 'uno');
+ CREATE VIEW v1 AS SELECT a, b FROM t3 EXCEPT SELECT 1, 'one';
+ CREATE TRIGGER trig1 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO t2 VALUES(old.a);
+ END;
+ UPDATE v1 SET b = 'hello';
+ SELECT * FROM t2;
+ ROLLBACK;
+ }
+ } {1 2 3}
+ do_test trigger9-3.6 {
+ execsql {
+ BEGIN;
+ INSERT INTO t3 VALUES(1, 'zero');
+ CREATE VIEW v1 AS
+ SELECT sum(a) AS a, max(b) AS b FROM t3 GROUP BY t3.a HAVING b>'two';
+ CREATE TRIGGER trig1 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO t2 VALUES(old.a);
+ END;
+ UPDATE v1 SET b = 'hello';
+ SELECT * FROM t2;
+ ROLLBACK;
+ }
+ } {2}
+}
+
+reset_db
+do_execsql_test 4.1 {
+ CREATE TABLE t1(a, b);
+ CREATE TABLE log(x);
+ INSERT INTO t1 VALUES(1, 2);
+ INSERT INTO t1 VALUES(3, 4);
+ CREATE VIEW v1 AS SELECT a, b FROM t1;
+
+ CREATE TRIGGER tr1 INSTEAD OF DELETE ON v1 BEGIN
+ INSERT INTO log VALUES('delete');
+ END;
+
+ CREATE TRIGGER tr2 INSTEAD OF UPDATE ON v1 BEGIN
+ INSERT INTO log VALUES('update');
+ END;
+
+ CREATE TRIGGER tr3 INSTEAD OF INSERT ON v1 BEGIN
+ INSERT INTO log VALUES('insert');
+ END;
+}
+
+do_catchsql_test 4.2 {
+ DELETE FROM v1 WHERE rowid=1;
+} {1 {no such column: rowid}}
+
+do_catchsql_test 4.3 {
+ UPDATE v1 SET a=b WHERE rowid=2;
+} {1 {no such column: rowid}}
+
+finish_test
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