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sqlcipher/test/e_changes.test

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# 2011 October 28
#
# 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
set testprefix e_changes
# Like [do_execsql_test], except it appends the value returned by
# [db changes] to the result of executing the SQL script.
#
proc do_changes_test {tn sql res} {
uplevel [list \
do_test $tn "concat \[execsql {$sql}\] \[db changes\]" $res
]
}
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-15996-49369 This function returns the number of rows
# modified, inserted or deleted by the most recently completed INSERT,
# UPDATE or DELETE statement on the database connection specified by the
# only parameter.
#
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(x, y, PRIMARY KEY(x, y)) WITHOUT ROWID;
CREATE INDEX i1 ON t1(a);
CREATE INDEX i2 ON t2(y);
}
foreach {tn schema} {
1 {
CREATE TABLE t1(a, b);
CREATE INDEX i1 ON t1(b);
}
2 {
CREATE TABLE t1(a, b, PRIMARY KEY(a, b)) WITHOUT ROWID;
CREATE INDEX i1 ON t1(b);
}
} {
reset_db
execsql $schema
# Insert 1 row.
do_changes_test 1.$tn.1 { INSERT INTO t1 VALUES(0, 0) } 1
# Insert 10 rows.
do_changes_test 1.$tn.2 {
WITH rows(i, j) AS (
SELECT 1, 1 UNION ALL SELECT i+1, j+i FROM rows WHERE i<10
)
INSERT INTO t1 SELECT * FROM rows
} 10
# Modify 5 rows.
do_changes_test 1.$tn.3 {
UPDATE t1 SET b=b+1 WHERE a<5;
} 5
# Delete 4 rows
do_changes_test 1.$tn.4 {
DELETE FROM t1 WHERE a>6
} 4
# Check the "on the database connecton specified" part of hte
# requirement - changes made by other connections do not show up in
# the return value of sqlite3_changes().
do_test 1.$tn.5 {
sqlite3 db2 test.db
execsql { INSERT INTO t1 VALUES(-1, -1) } db2
db2 changes
} 1
do_test 1.$tn.6 {
db changes
} 4
db2 close
# Test that statements that modify no rows because they hit UNIQUE
# constraints set the sqlite3_changes() value to 0. Regardless of
# whether or not they are executed inside an explicit transaction.
#
# 1.$tn.8-9: outside of a transaction
# 1.$tn.10-12: inside a transaction
#
do_changes_test 1.$tn.7 {
CREATE UNIQUE INDEX i2 ON t1(a);
} 4
do_catchsql_test 1.$tn.8 {
INSERT INTO t1 VALUES('a', 0), ('b', 0), ('c', 0), (0, 11);
} {1 {UNIQUE constraint failed: t1.a}}
do_test 1.$tn.9 { db changes } 0
do_catchsql_test 1.$tn.10 {
BEGIN;
INSERT INTO t1 VALUES('a', 0), ('b', 0), ('c', 0), (0, 11);
} {1 {UNIQUE constraint failed: t1.a}}
do_test 1.$tn.11 { db changes } 0
do_changes_test 1.$tn.12 COMMIT 0
}
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-44877-05564 Executing any other type of SQL statement
# does not modify the value returned by this function.
#
reset_db
do_changes_test 2.1 { CREATE TABLE t1(x) } 0
do_changes_test 2.2 {
WITH d(y) AS (SELECT 1 UNION ALL SELECT y+1 FROM d WHERE y<47)
INSERT INTO t1 SELECT y FROM d;
} 47
# The statement above set changes() to 47. Check that none of the following
# modify this.
do_changes_test 2.3 { SELECT count(x) FROM t1 } {47 47}
do_changes_test 2.4 { DROP TABLE t1 } 47
do_changes_test 2.5 { CREATE TABLE t1(x) } 47
do_changes_test 2.6 { ALTER TABLE t1 ADD COLUMN b } 47
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-53938-27527 Only changes made directly by the INSERT,
# UPDATE or DELETE statement are considered - auxiliary changes caused
# by triggers, foreign key actions or REPLACE constraint resolution are
# not counted.
#
# 3.1.*: triggers
# 3.2.*: foreign key actions
# 3.3.*: replace constraints
#
reset_db
do_execsql_test 3.1.0 {
CREATE TABLE log(x);
CREATE TABLE p1(one PRIMARY KEY, two);
CREATE TRIGGER tr_ai AFTER INSERT ON p1 BEGIN
INSERT INTO log VALUES('insert');
END;
CREATE TRIGGER tr_bd BEFORE DELETE ON p1 BEGIN
INSERT INTO log VALUES('delete');
END;
CREATE TRIGGER tr_au AFTER UPDATE ON p1 BEGIN
INSERT INTO log VALUES('update');
END;
}
do_changes_test 3.1.1 {
INSERT INTO p1 VALUES('a', 'A'), ('b', 'B'), ('c', 'C');
} 3
do_changes_test 3.1.2 {
UPDATE p1 SET two = two||two;
} 3
do_changes_test 3.1.3 {
DELETE FROM p1 WHERE one IN ('a', 'c');
} 2
do_execsql_test 3.1.4 {
-- None of the inserts on table log were counted.
SELECT count(*) FROM log
} 8
do_execsql_test 3.2.0 {
DELETE FROM p1;
INSERT INTO p1 VALUES('a', 'A'), ('b', 'B'), ('c', 'C');
CREATE TABLE c1(a, b, FOREIGN KEY(a) REFERENCES p1 ON DELETE SET NULL);
CREATE TABLE c2(a, b, FOREIGN KEY(a) REFERENCES p1 ON DELETE SET DEFAULT);
CREATE TABLE c3(a, b, FOREIGN KEY(a) REFERENCES p1 ON DELETE CASCADE);
INSERT INTO c1 VALUES('a', 'aaa');
INSERT INTO c2 VALUES('b', 'bbb');
INSERT INTO c3 VALUES('c', 'ccc');
INSERT INTO p1 VALUES('d', 'D'), ('e', 'E'), ('f', 'F');
CREATE TABLE c4(a, b, FOREIGN KEY(a) REFERENCES p1 ON UPDATE SET NULL);
CREATE TABLE c5(a, b, FOREIGN KEY(a) REFERENCES p1 ON UPDATE SET DEFAULT);
CREATE TABLE c6(a, b, FOREIGN KEY(a) REFERENCES p1 ON UPDATE CASCADE);
INSERT INTO c4 VALUES('d', 'aaa');
INSERT INTO c5 VALUES('e', 'bbb');
INSERT INTO c6 VALUES('f', 'ccc');
PRAGMA foreign_keys = ON;
}
do_changes_test 3.2.1 { DELETE FROM p1 WHERE one = 'a' } 1
do_changes_test 3.2.2 { DELETE FROM p1 WHERE one = 'b' } 1
do_changes_test 3.2.3 { DELETE FROM p1 WHERE one = 'c' } 1
do_execsql_test 3.2.4 {
SELECT * FROM c1;
SELECT * FROM c2;
SELECT * FROM c3;
} {{} aaa {} bbb}
do_changes_test 3.2.5 { UPDATE p1 SET one = 'g' WHERE one = 'd' } 1
do_changes_test 3.2.6 { UPDATE p1 SET one = 'h' WHERE one = 'e' } 1
do_changes_test 3.2.7 { UPDATE p1 SET one = 'i' WHERE one = 'f' } 1
do_execsql_test 3.2.8 {
SELECT * FROM c4;
SELECT * FROM c5;
SELECT * FROM c6;
} {{} aaa {} bbb i ccc}
do_execsql_test 3.3.0 {
CREATE TABLE r1(a UNIQUE, b UNIQUE);
INSERT INTO r1 VALUES('i', 'i');
INSERT INTO r1 VALUES('ii', 'ii');
INSERT INTO r1 VALUES('iii', 'iii');
INSERT INTO r1 VALUES('iv', 'iv');
INSERT INTO r1 VALUES('v', 'v');
INSERT INTO r1 VALUES('vi', 'vi');
INSERT INTO r1 VALUES('vii', 'vii');
}
do_changes_test 3.3.1 { INSERT OR REPLACE INTO r1 VALUES('i', 1) } 1
do_changes_test 3.3.2 { INSERT OR REPLACE INTO r1 VALUES('iv', 'v') } 1
do_changes_test 3.3.3 { UPDATE OR REPLACE r1 SET b='v' WHERE a='iii' } 1
do_changes_test 3.3.4 { UPDATE OR REPLACE r1 SET b='vi',a='vii' WHERE a='ii' } 1
do_execsql_test 3.3.5 {
SELECT * FROM r1 ORDER BY a;
} {i 1 iii v vii vi}
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-09813-48563 The value returned by sqlite3_changes()
# immediately after an INSERT, UPDATE or DELETE statement run on a view
# is always zero.
#
reset_db
do_execsql_test 4.1 {
CREATE TABLE log(log);
CREATE TABLE t1(x, y);
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t1 VALUES(3, 4);
INSERT INTO t1 VALUES(5, 6);
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE TRIGGER v1_i INSTEAD OF INSERT ON v1 BEGIN
INSERT INTO log VALUES('insert');
END;
CREATE TRIGGER v1_u INSTEAD OF UPDATE ON v1 BEGIN
INSERT INTO log VALUES('update'), ('update');
END;
CREATE TRIGGER v1_d INSTEAD OF DELETE ON v1 BEGIN
INSERT INTO log VALUES('delete'), ('delete'), ('delete');
END;
}
do_changes_test 4.2.1 { INSERT INTO t1 SELECT * FROM t1 } 3
do_changes_test 4.2.2 { INSERT INTO v1 VALUES(1, 2) } 0
do_changes_test 4.3.1 { INSERT INTO t1 SELECT * FROM t1 } 6
do_changes_test 4.3.2 { UPDATE v1 SET y='xyz' WHERE x=1 } 0
do_changes_test 4.4.1 { INSERT INTO t1 SELECT * FROM t1 } 12
do_changes_test 4.4.2 { DELETE FROM v1 WHERE x=5 } 0
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-32918-61474 Before entering a trigger program the value
# returned by sqlite3_changes() function is saved. After the trigger
# program has finished, the original value is restored.
#
reset_db
db func my_changes my_changes
set ::changes [list]
proc my_changes {x} {
set res [db changes]
lappend ::changes $x $res
return $res
}
do_execsql_test 5.1.0 {
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
CREATE TABLE t2(x);
INSERT INTO t1 VALUES(1, NULL);
INSERT INTO t1 VALUES(2, NULL);
INSERT INTO t1 VALUES(3, NULL);
CREATE TRIGGER AFTER UPDATE ON t1 BEGIN
INSERT INTO t2 VALUES('a'), ('b'), ('c');
SELECT my_changes('trigger');
END;
}
do_execsql_test 5.1.1 {
INSERT INTO t2 VALUES('a'), ('b');
UPDATE t1 SET b = my_changes('update');
SELECT * FROM t1;
} {1 2 2 2 3 2}
# Value is being restored to "2" when the trigger program exits.
do_test 5.1.2 {
set ::changes
} {update 2 trigger 3 update 2 trigger 3 update 2 trigger 3}
reset_db
do_execsql_test 5.2.0 {
CREATE TABLE t1(a, b);
CREATE TABLE log(x);
INSERT INTO t1 VALUES(1, 0);
INSERT INTO t1 VALUES(2, 0);
INSERT INTO t1 VALUES(3, 0);
CREATE TRIGGER t1_a_u AFTER UPDATE ON t1 BEGIN
INSERT INTO log VALUES(old.b || ' -> ' || new.b || ' c = ' || changes() );
END;
CREATE TABLE t2(a);
INSERT INTO t2 VALUES(1), (2), (3);
UPDATE t1 SET b = changes();
}
do_execsql_test 5.2.1 {
SELECT * FROM t1;
} {1 3 2 3 3 3}
do_execsql_test 5.2.2 {
SELECT * FROM log;
} {{0 -> 3 c = 3} {0 -> 3 c = 3} {0 -> 3 c = 3}}
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-17146-37073 Within a trigger program each INSERT,
# UPDATE and DELETE statement sets the value returned by
# sqlite3_changes() upon completion as normal. Of course, this value
# will not include any changes performed by sub-triggers, as the
# sqlite3_changes() value will be saved and restored after each
# sub-trigger has run.
reset_db
do_execsql_test 6.0 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(a, b);
CREATE TABLE t3(a, b);
CREATE TABLE log(x);
CREATE TRIGGER t1_i BEFORE INSERT ON t1 BEGIN
INSERT INTO t2 VALUES(new.a, new.b), (new.a, new.b);
INSERT INTO log VALUES('t2->' || changes());
END;
CREATE TRIGGER t2_i AFTER INSERT ON t2 BEGIN
INSERT INTO t3 VALUES(new.a, new.b), (new.a, new.b), (new.a, new.b);
INSERT INTO log VALUES('t3->' || changes());
END;
CREATE TRIGGER t1_u AFTER UPDATE ON t1 BEGIN
UPDATE t2 SET b=new.b WHERE a=old.a;
INSERT INTO log VALUES('t2->' || changes());
END;
CREATE TRIGGER t2_u BEFORE UPDATE ON t2 BEGIN
UPDATE t3 SET b=new.b WHERE a=old.a;
INSERT INTO log VALUES('t3->' || changes());
END;
CREATE TRIGGER t1_d AFTER DELETE ON t1 BEGIN
DELETE FROM t2 WHERE a=old.a AND b=old.b;
INSERT INTO log VALUES('t2->' || changes());
END;
CREATE TRIGGER t2_d BEFORE DELETE ON t2 BEGIN
DELETE FROM t3 WHERE a=old.a AND b=old.b;
INSERT INTO log VALUES('t3->' || changes());
END;
}
do_changes_test 6.1 {
INSERT INTO t1 VALUES('+', 'o');
SELECT * FROM log;
} {t3->3 t3->3 t2->2 1}
do_changes_test 6.2 {
DELETE FROM log;
UPDATE t1 SET b='*';
SELECT * FROM log;
} {t3->6 t3->6 t2->2 1}
do_changes_test 6.3 {
DELETE FROM log;
DELETE FROM t1;
SELECT * FROM log;
} {t3->6 t3->0 t2->2 1}
#--------------------------------------------------------------------------
# EVIDENCE-OF: R-43399-09409 This means that if the changes() SQL
# function (or similar) is used by the first INSERT, UPDATE or DELETE
# statement within a trigger, it returns the value as set when the
# calling statement began executing.
#
# EVIDENCE-OF: R-53215-27584 If it is used by the second or subsequent
# such statement within a trigger program, the value returned reflects
# the number of rows modified by the previous INSERT, UPDATE or DELETE
# statement within the same trigger.
#
reset_db
do_execsql_test 7.1 {
CREATE TABLE q1(t);
CREATE TABLE q2(u, v);
CREATE TABLE q3(w);
CREATE TRIGGER q2_insert BEFORE INSERT ON q2 BEGIN
/* changes() returns value from previous I/U/D in callers context */
INSERT INTO q1 VALUES('1:' || changes());
/* changes() returns value of previous I/U/D in this context */
INSERT INTO q3 VALUES(changes()), (2), (3);
INSERT INTO q1 VALUES('2:' || changes());
INSERT INTO q3 VALUES(changes() + 3), (changes()+4);
SELECT 'this does not affect things!';
INSERT INTO q1 VALUES('3:' || changes());
UPDATE q3 SET w = w+10 WHERE w%2;
INSERT INTO q1 VALUES('4:' || changes());
DELETE FROM q3;
INSERT INTO q1 VALUES('5:' || changes());
END;
}
do_execsql_test 7.2 {
INSERT INTO q2 VALUES('x', 'y');
SELECT * FROM q1;
} {
1:0 2:3 3:2 4:3 5:5
}
do_execsql_test 7.3 {
DELETE FROM q1;
INSERT INTO q2 VALUES('x', 'y');
SELECT * FROM q1;
} {
1:5 2:3 3:2 4:3 5:5
}
finish_test
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