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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
-}
-
-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}
-}
-
-finish_test
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-31 11:27:28 +0000