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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
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