# 2009 October 7
#
# 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 tests to verify the "testable statements" in the
# foreignkeys.in document.
#
# The tests in this file are arranged to mirror the structure of
# foreignkey.in, with one exception: The statements in section 2, which
# deals with enabling/disabling foreign key support, is tested first,
# before section 1. This is because some statements in section 2 deal
# with builds that do not include complete foreign key support (because
# either SQLITE_OMIT_TRIGGER or SQLITE_OMIT_FOREIGN_KEY was defined
# at build time).
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
proc eqp {sql {db db}} { uplevel execsql [list "EXPLAIN QUERY PLAN $sql"] $db }
###########################################################################
### SECTION 2: Enabling Foreign Key Support
###########################################################################
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-33710-56344 In order to use foreign key constraints in
# SQLite, the library must be compiled with neither
# SQLITE_OMIT_FOREIGN_KEY or SQLITE_OMIT_TRIGGER defined.
#
ifcapable trigger&&foreignkey {
do_test e_fkey-1 {
execsql {
PRAGMA foreign_keys = ON;
CREATE TABLE p(i PRIMARY KEY);
CREATE TABLE c(j REFERENCES p ON UPDATE CASCADE);
INSERT INTO p VALUES('hello');
INSERT INTO c VALUES('hello');
UPDATE p SET i = 'world';
SELECT * FROM c;
}
} {world}
}
#-------------------------------------------------------------------------
# Test the effects of defining OMIT_TRIGGER but not OMIT_FOREIGN_KEY.
#
# EVIDENCE-OF: R-44697-61543 If SQLITE_OMIT_TRIGGER is defined but
# SQLITE_OMIT_FOREIGN_KEY is not, then SQLite behaves as it did prior to
# version 3.6.19 - foreign key definitions are parsed and may be queried
# using PRAGMA foreign_key_list, but foreign key constraints are not
# enforced.
#
# Specifically, test that "PRAGMA foreign_keys" is a no-op in this case.
# When using the pragma to query the current setting, 0 rows are returned.
#
# EVIDENCE-OF: R-22567-44039 The PRAGMA foreign_keys command is a no-op
# in this configuration.
#
# EVIDENCE-OF: R-41784-13339 Tip: If the command "PRAGMA foreign_keys"
# returns no data instead of a single row containing "0" or "1", then
# the version of SQLite you are using does not support foreign keys
# (either because it is older than 3.6.19 or because it was compiled
# with SQLITE_OMIT_FOREIGN_KEY or SQLITE_OMIT_TRIGGER defined).
#
reset_db
ifcapable !trigger&&foreignkey {
do_test e_fkey-2.1 {
execsql {
PRAGMA foreign_keys = ON;
CREATE TABLE p(i PRIMARY KEY);
CREATE TABLE c(j REFERENCES p ON UPDATE CASCADE);
INSERT INTO p VALUES('hello');
INSERT INTO c VALUES('hello');
UPDATE p SET i = 'world';
SELECT * FROM c;
}
} {hello}
do_test e_fkey-2.2 {
execsql { PRAGMA foreign_key_list(c) }
} {0 0 p j {} CASCADE {NO ACTION} NONE}
do_test e_fkey-2.3 {
execsql { PRAGMA foreign_keys }
} {}
}
#-------------------------------------------------------------------------
# Test the effects of defining OMIT_FOREIGN_KEY.
#
# EVIDENCE-OF: R-58428-36660 If OMIT_FOREIGN_KEY is defined, then
# foreign key definitions cannot even be parsed (attempting to specify a
# foreign key definition is a syntax error).
#
# Specifically, test that foreign key constraints cannot even be parsed
# in such a build.
#
reset_db
ifcapable !foreignkey {
do_test e_fkey-3.1 {
execsql { CREATE TABLE p(i PRIMARY KEY) }
catchsql { CREATE TABLE c(j REFERENCES p ON UPDATE CASCADE) }
} {1 {near "ON": syntax error}}
do_test e_fkey-3.2 {
# This is allowed, as in this build, "REFERENCES" is not a keyword.
# The declared datatype of column j is "REFERENCES p".
execsql { CREATE TABLE c(j REFERENCES p) }
} {}
do_test e_fkey-3.3 {
execsql { PRAGMA table_info(c) }
} {0 j {REFERENCES p} 0 {} 0}
do_test e_fkey-3.4 {
execsql { PRAGMA foreign_key_list(c) }
} {}
do_test e_fkey-3.5 {
execsql { PRAGMA foreign_keys }
} {}
}
ifcapable !foreignkey||!trigger { finish_test ; return }
reset_db
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-07280-60510 Assuming the library is compiled with
# foreign key constraints enabled, it must still be enabled by the
# application at runtime, using the PRAGMA foreign_keys command.
#
# This also tests that foreign key constraints are disabled by default.
#
# EVIDENCE-OF: R-59578-04990 Foreign key constraints are disabled by
# default (for backwards compatibility), so must be enabled separately
# for each database connection separately.
#
drop_all_tables
do_test e_fkey-4.1 {
execsql {
CREATE TABLE p(i PRIMARY KEY);
CREATE TABLE c(j REFERENCES p ON UPDATE CASCADE);
INSERT INTO p VALUES('hello');
INSERT INTO c VALUES('hello');
UPDATE p SET i = 'world';
SELECT * FROM c;
}
} {hello}
do_test e_fkey-4.2 {
execsql {
DELETE FROM c;
DELETE FROM p;
PRAGMA foreign_keys = ON;
INSERT INTO p VALUES('hello');
INSERT INTO c VALUES('hello');
UPDATE p SET i = 'world';
SELECT * FROM c;
}
} {world}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-15278-54456 The application can can also use a PRAGMA
# foreign_keys statement to determine if foreign keys are currently
# enabled.
#
# This also tests the example code in section 2 of foreignkeys.in.
#
# EVIDENCE-OF: R-11255-19907
#
reset_db
do_test e_fkey-5.1 {
execsql { PRAGMA foreign_keys }
} {0}
do_test e_fkey-5.2 {
execsql {
PRAGMA foreign_keys = ON;
PRAGMA foreign_keys;
}
} {1}
do_test e_fkey-5.3 {
execsql {
PRAGMA foreign_keys = OFF;
PRAGMA foreign_keys;
}
} {0}
#-------------------------------------------------------------------------
# Test that it is not possible to enable or disable foreign key support
# while not in auto-commit mode.
#
# EVIDENCE-OF: R-46649-58537 It is not possible to enable or disable
# foreign key constraints in the middle of a multi-statement transaction
# (when SQLite is not in autocommit mode). Attempting to do so does not
# return an error; it simply has no effect.
#
reset_db
do_test e_fkey-6.1 {
execsql {
PRAGMA foreign_keys = ON;
CREATE TABLE t1(a UNIQUE, b);
CREATE TABLE t2(c, d REFERENCES t1(a));
INSERT INTO t1 VALUES(1, 2);
INSERT INTO t2 VALUES(2, 1);
BEGIN;
PRAGMA foreign_keys = OFF;
}
catchsql {
DELETE FROM t1
}
} {1 {foreign key constraint failed}}
do_test e_fkey-6.2 {
execsql { PRAGMA foreign_keys }
} {1}
do_test e_fkey-6.3 {
execsql {
COMMIT;
PRAGMA foreign_keys = OFF;
BEGIN;
PRAGMA foreign_keys = ON;
DELETE FROM t1;
PRAGMA foreign_keys;
}
} {0}
do_test e_fkey-6.4 {
execsql COMMIT
} {}
###########################################################################
### SECTION 1: Introduction to Foreign Key Constraints
###########################################################################
execsql "PRAGMA foreign_keys = ON"
#-------------------------------------------------------------------------
# Verify that the syntax in the first example in section 1 is valid.
#
# EVIDENCE-OF: R-04042-24825 To do so, a foreign key definition may be
# added by modifying the declaration of the track table to the
# following: CREATE TABLE track( trackid INTEGER, trackname TEXT,
# trackartist INTEGER, FOREIGN KEY(trackartist) REFERENCES
# artist(artistid) );
#
do_test e_fkey-7.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER,
FOREIGN KEY(trackartist) REFERENCES artist(artistid)
);
}
} {}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-61362-32087 Attempting to insert a row into the track
# table that does not correspond to any row in the artist table will
# fail,
#
do_test e_fkey-8.1 {
catchsql { INSERT INTO track VALUES(1, 'track 1', 1) }
} {1 {foreign key constraint failed}}
do_test e_fkey-8.2 {
execsql { INSERT INTO artist VALUES(2, 'artist 1') }
catchsql { INSERT INTO track VALUES(1, 'track 1', 1) }
} {1 {foreign key constraint failed}}
do_test e_fkey-8.2 {
execsql { INSERT INTO track VALUES(1, 'track 1', 2) }
} {}
#-------------------------------------------------------------------------
# Attempting to delete a row from the 'artist' table while there are
# dependent rows in the track table also fails.
#
# EVIDENCE-OF: R-24401-52400 as will attempting to delete a row from the
# artist table when there exist dependent rows in the track table
#
do_test e_fkey-9.1 {
catchsql { DELETE FROM artist WHERE artistid = 2 }
} {1 {foreign key constraint failed}}
do_test e_fkey-9.2 {
execsql {
DELETE FROM track WHERE trackartist = 2;
DELETE FROM artist WHERE artistid = 2;
}
} {}
#-------------------------------------------------------------------------
# If the foreign key column (trackartist) in table 'track' is set to NULL,
# there is no requirement for a matching row in the 'artist' table.
#
# EVIDENCE-OF: R-23980-48859 There is one exception: if the foreign key
# column in the track table is NULL, then no corresponding entry in the
# artist table is required.
#
do_test e_fkey-10.1 {
execsql {
INSERT INTO track VALUES(1, 'track 1', NULL);
INSERT INTO track VALUES(2, 'track 2', NULL);
}
} {}
do_test e_fkey-10.2 {
execsql { SELECT * FROM artist }
} {}
do_test e_fkey-10.3 {
# Setting the trackid to a non-NULL value fails, of course.
catchsql { UPDATE track SET trackartist = 5 WHERE trackid = 1 }
} {1 {foreign key constraint failed}}
do_test e_fkey-10.4 {
execsql {
INSERT INTO artist VALUES(5, 'artist 5');
UPDATE track SET trackartist = 5 WHERE trackid = 1;
}
catchsql { DELETE FROM artist WHERE artistid = 5}
} {1 {foreign key constraint failed}}
do_test e_fkey-10.5 {
execsql {
UPDATE track SET trackartist = NULL WHERE trackid = 1;
DELETE FROM artist WHERE artistid = 5;
}
} {}
#-------------------------------------------------------------------------
# Test that the following is true fo all rows in the track table:
#
# trackartist IS NULL OR
# EXISTS(SELECT 1 FROM artist WHERE artistid=trackartist)
#
# EVIDENCE-OF: R-52486-21352 Expressed in SQL, this means that for every
# row in the track table, the following expression evaluates to true:
# trackartist IS NULL OR EXISTS(SELECT 1 FROM artist WHERE
# artistid=trackartist)
# This procedure executes a test case to check that statement
# R-52486-21352 is true after executing the SQL statement passed.
# as the second argument.
proc test_r52486_21352 {tn sql} {
set res [catchsql $sql]
set results {
{0 {}}
{1 {PRIMARY KEY must be unique}}
{1 {foreign key constraint failed}}
}
if {[lsearch $results $res]<0} {
error $res
}
do_test e_fkey-11.$tn {
execsql {
SELECT count(*) FROM track WHERE NOT (
trackartist IS NULL OR
EXISTS(SELECT 1 FROM artist WHERE artistid=trackartist)
)
}
} {0}
}
# Execute a series of random INSERT, UPDATE and DELETE operations
# (some of which may fail due to FK or PK constraint violations) on
# the two tables in the example schema. Test that R-52486-21352
# is true after executing each operation.
#
set Template {
{INSERT INTO track VALUES($t, 'track $t', $a)}
{DELETE FROM track WHERE trackid = $t}
{UPDATE track SET trackartist = $a WHERE trackid = $t}
{INSERT INTO artist VALUES($a, 'artist $a')}
{DELETE FROM artist WHERE artistid = $a}
{UPDATE artist SET artistid = $a2 WHERE artistid = $a}
}
for {set i 0} {$i < 500} {incr i} {
set a [expr int(rand()*10)]
set a2 [expr int(rand()*10)]
set t [expr int(rand()*50)]
set sql [subst [lindex $Template [expr int(rand()*6)]]]
test_r52486_21352 $i $sql
}
#-------------------------------------------------------------------------
# Check that a NOT NULL constraint can be added to the example schema
# to prohibit NULL child keys from being inserted.
#
# EVIDENCE-OF: R-42412-59321 Tip: If the application requires a stricter
# relationship between artist and track, where NULL values are not
# permitted in the trackartist column, simply add the appropriate "NOT
# NULL" constraint to the schema.
#
drop_all_tables
do_test e_fkey-12.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER NOT NULL,
FOREIGN KEY(trackartist) REFERENCES artist(artistid)
);
}
} {}
do_test e_fkey-12.2 {
catchsql { INSERT INTO track VALUES(14, 'Mr. Bojangles', NULL) }
} {1 {track.trackartist may not be NULL}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-16127-35442
#
# Test an example from foreignkeys.html.
#
drop_all_tables
do_test e_fkey-13.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER,
FOREIGN KEY(trackartist) REFERENCES artist(artistid)
);
INSERT INTO artist VALUES(1, 'Dean Martin');
INSERT INTO artist VALUES(2, 'Frank Sinatra');
INSERT INTO track VALUES(11, 'That''s Amore', 1);
INSERT INTO track VALUES(12, 'Christmas Blues', 1);
INSERT INTO track VALUES(13, 'My Way', 2);
}
} {}
do_test e_fkey-13.2 {
catchsql { INSERT INTO track VALUES(14, 'Mr. Bojangles', 3) }
} {1 {foreign key constraint failed}}
do_test e_fkey-13.3 {
execsql { INSERT INTO track VALUES(14, 'Mr. Bojangles', NULL) }
} {}
do_test e_fkey-13.4 {
catchsql {
UPDATE track SET trackartist = 3 WHERE trackname = 'Mr. Bojangles';
}
} {1 {foreign key constraint failed}}
do_test e_fkey-13.5 {
execsql {
INSERT INTO artist VALUES(3, 'Sammy Davis Jr.');
UPDATE track SET trackartist = 3 WHERE trackname = 'Mr. Bojangles';
INSERT INTO track VALUES(15, 'Boogie Woogie', 3);
}
} {}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-15958-50233
#
# Test the second example from the first section of foreignkeys.html.
#
do_test e_fkey-14.1 {
catchsql {
DELETE FROM artist WHERE artistname = 'Frank Sinatra';
}
} {1 {foreign key constraint failed}}
do_test e_fkey-14.2 {
execsql {
DELETE FROM track WHERE trackname = 'My Way';
DELETE FROM artist WHERE artistname = 'Frank Sinatra';
}
} {}
do_test e_fkey-14.3 {
catchsql {
UPDATE artist SET artistid=4 WHERE artistname = 'Dean Martin';
}
} {1 {foreign key constraint failed}}
do_test e_fkey-14.4 {
execsql {
DELETE FROM track WHERE trackname IN('That''s Amore', 'Christmas Blues');
UPDATE artist SET artistid=4 WHERE artistname = 'Dean Martin';
}
} {}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-56032-24923 The foreign key constraint is satisfied if
# for each row in the child table either one or more of the child key
# columns are NULL, or there exists a row in the parent table for which
# each parent key column contains a value equal to the value in its
# associated child key column.
#
# Test also that the usual comparison rules are used when testing if there
# is a matching row in the parent table of a foreign key constraint.
#
# EVIDENCE-OF: R-57765-12380 In the above paragraph, the term "equal"
# means equal when values are compared using the rules specified here.
#
drop_all_tables
do_test e_fkey-15.1 {
execsql {
CREATE TABLE par(p PRIMARY KEY);
CREATE TABLE chi(c REFERENCES par);
INSERT INTO par VALUES(1);
INSERT INTO par VALUES('1');
INSERT INTO par VALUES(X'31');
SELECT typeof(p) FROM par;
}
} {integer text blob}
proc test_efkey_45 {tn isError sql} {
do_test e_fkey-15.$tn.1 "
catchsql {$sql}
" [lindex {{0 {}} {1 {foreign key constraint failed}}} $isError]
do_test e_fkey-15.$tn.2 {
execsql {
SELECT * FROM chi WHERE c IS NOT NULL AND c NOT IN (SELECT p FROM par)
}
} {}
}
test_efkey_45 1 0 "INSERT INTO chi VALUES(1)"
test_efkey_45 2 1 "INSERT INTO chi VALUES('1.0')"
test_efkey_45 3 0 "INSERT INTO chi VALUES('1')"
test_efkey_45 4 1 "DELETE FROM par WHERE p = '1'"
test_efkey_45 5 0 "DELETE FROM chi WHERE c = '1'"
test_efkey_45 6 0 "DELETE FROM par WHERE p = '1'"
test_efkey_45 7 1 "INSERT INTO chi VALUES('1')"
test_efkey_45 8 0 "INSERT INTO chi VALUES(X'31')"
test_efkey_45 9 1 "INSERT INTO chi VALUES(X'32')"
#-------------------------------------------------------------------------
# Specifically, test that when comparing child and parent key values the
# default collation sequence of the parent key column is used.
#
# EVIDENCE-OF: R-15796-47513 When comparing text values, the collating
# sequence associated with the parent key column is always used.
#
drop_all_tables
do_test e_fkey-16.1 {
execsql {
CREATE TABLE t1(a COLLATE nocase PRIMARY KEY);
CREATE TABLE t2(b REFERENCES t1);
}
} {}
do_test e_fkey-16.2 {
execsql {
INSERT INTO t1 VALUES('oNe');
INSERT INTO t2 VALUES('one');
INSERT INTO t2 VALUES('ONE');
UPDATE t2 SET b = 'OnE';
UPDATE t1 SET a = 'ONE';
}
} {}
do_test e_fkey-16.3 {
catchsql { UPDATE t2 SET b = 'two' WHERE rowid = 1 }
} {1 {foreign key constraint failed}}
do_test e_fkey-16.4 {
catchsql { DELETE FROM t1 WHERE rowid = 1 }
} {1 {foreign key constraint failed}}
#-------------------------------------------------------------------------
# Specifically, test that when comparing child and parent key values the
# affinity of the parent key column is applied to the child key value
# before the comparison takes place.
#
# EVIDENCE-OF: R-04240-13860 When comparing values, if the parent key
# column has an affinity, then that affinity is applied to the child key
# value before the comparison is performed.
#
drop_all_tables
do_test e_fkey-17.1 {
execsql {
CREATE TABLE t1(a NUMERIC PRIMARY KEY);
CREATE TABLE t2(b TEXT REFERENCES t1);
}
} {}
do_test e_fkey-17.2 {
execsql {
INSERT INTO t1 VALUES(1);
INSERT INTO t1 VALUES(2);
INSERT INTO t1 VALUES('three');
INSERT INTO t2 VALUES('2.0');
SELECT b, typeof(b) FROM t2;
}
} {2.0 text}
do_test e_fkey-17.3 {
execsql { SELECT typeof(a) FROM t1 }
} {integer integer text}
do_test e_fkey-17.4 {
catchsql { DELETE FROM t1 WHERE rowid = 2 }
} {1 {foreign key constraint failed}}
###########################################################################
### SECTION 3: Required and Suggested Database Indexes
###########################################################################
#-------------------------------------------------------------------------
# A parent key must be either a PRIMARY KEY, subject to a UNIQUE
# constraint, or have a UNIQUE index created on it.
#
# EVIDENCE-OF: R-13435-26311 Usually, the parent key of a foreign key
# constraint is the primary key of the parent table. If they are not the
# primary key, then the parent key columns must be collectively subject
# to a UNIQUE constraint or have a UNIQUE index.
#
# Also test that if a parent key is not subject to a PRIMARY KEY or UNIQUE
# constraint, but does have a UNIQUE index created on it, then the UNIQUE index
# must use the default collation sequences associated with the parent key
# columns.
#
# EVIDENCE-OF: R-00376-39212 If the parent key columns have a UNIQUE
# index, then that index must use the collation sequences that are
# specified in the CREATE TABLE statement for the parent table.
#
drop_all_tables
do_test e_fkey-18.1 {
execsql {
CREATE TABLE t2(a REFERENCES t1(x));
}
} {}
proc test_efkey_57 {tn isError sql} {
catchsql { DROP TABLE t1 }
execsql $sql
do_test e_fkey-18.$tn {
catchsql { INSERT INTO t2 VALUES(NULL) }
} [lindex {{0 {}} {1 {foreign key mismatch}}} $isError]
}
test_efkey_57 2 0 { CREATE TABLE t1(x PRIMARY KEY) }
test_efkey_57 3 0 { CREATE TABLE t1(x UNIQUE) }
test_efkey_57 4 0 { CREATE TABLE t1(x); CREATE UNIQUE INDEX t1i ON t1(x) }
test_efkey_57 5 1 {
CREATE TABLE t1(x);
CREATE UNIQUE INDEX t1i ON t1(x COLLATE nocase);
}
test_efkey_57 6 1 { CREATE TABLE t1(x) }
test_efkey_57 7 1 { CREATE TABLE t1(x, y, PRIMARY KEY(x, y)) }
test_efkey_57 8 1 { CREATE TABLE t1(x, y, UNIQUE(x, y)) }
test_efkey_57 9 1 {
CREATE TABLE t1(x, y);
CREATE UNIQUE INDEX t1i ON t1(x, y);
}
#-------------------------------------------------------------------------
# This block tests an example in foreignkeys.html. Several testable
# statements refer to this example, as follows
#
# EVIDENCE-OF: R-27484-01467
#
# FK Constraints on child1, child2 and child3 are Ok.
#
# Problem with FK on child4:
#
# EVIDENCE-OF: R-51039-44840 The foreign key declared as part of table
# child4 is an error because even though the parent key column is
# indexed, the index is not UNIQUE.
#
# Problem with FK on child5:
#
# EVIDENCE-OF: R-01060-48788 The foreign key for table child5 is an
# error because even though the parent key column has a unique index,
# the index uses a different collating sequence.
#
# Problem with FK on child6 and child7:
#
# EVIDENCE-OF: R-63088-37469 Tables child6 and child7 are incorrect
# because while both have UNIQUE indices on their parent keys, the keys
# are not an exact match to the columns of a single UNIQUE index.
#
drop_all_tables
do_test e_fkey-19.1 {
execsql {
CREATE TABLE parent(a PRIMARY KEY, b UNIQUE, c, d, e, f);
CREATE UNIQUE INDEX i1 ON parent(c, d);
CREATE INDEX i2 ON parent(e);
CREATE UNIQUE INDEX i3 ON parent(f COLLATE nocase);
CREATE TABLE child1(f, g REFERENCES parent(a)); -- Ok
CREATE TABLE child2(h, i REFERENCES parent(b)); -- Ok
CREATE TABLE child3(j, k, FOREIGN KEY(j, k) REFERENCES parent(c, d)); -- Ok
CREATE TABLE child4(l, m REFERENCES parent(e)); -- Err
CREATE TABLE child5(n, o REFERENCES parent(f)); -- Err
CREATE TABLE child6(p, q, FOREIGN KEY(p,q) REFERENCES parent(b, c)); -- Err
CREATE TABLE child7(r REFERENCES parent(c)); -- Err
}
} {}
do_test e_fkey-19.2 {
execsql {
INSERT INTO parent VALUES(1, 2, 3, 4, 5, 6);
INSERT INTO child1 VALUES('xxx', 1);
INSERT INTO child2 VALUES('xxx', 2);
INSERT INTO child3 VALUES(3, 4);
}
} {}
do_test e_fkey-19.2 {
catchsql { INSERT INTO child4 VALUES('xxx', 5) }
} {1 {foreign key mismatch}}
do_test e_fkey-19.3 {
catchsql { INSERT INTO child5 VALUES('xxx', 6) }
} {1 {foreign key mismatch}}
do_test e_fkey-19.4 {
catchsql { INSERT INTO child6 VALUES(2, 3) }
} {1 {foreign key mismatch}}
do_test e_fkey-19.5 {
catchsql { INSERT INTO child7 VALUES(3) }
} {1 {foreign key mismatch}}
#-------------------------------------------------------------------------
# Test errors in the database schema that are detected while preparing
# DML statements. The error text for these messages always matches
# either "foreign key mismatch" or "no such table*" (using [string match]).
#
# EVIDENCE-OF: R-45488-08504 If the database schema contains foreign key
# errors that require looking at more than one table definition to
# identify, then those errors are not detected when the tables are
# created.
#
# EVIDENCE-OF: R-48391-38472 Instead, such errors prevent the
# application from preparing SQL statements that modify the content of
# the child or parent tables in ways that use the foreign keys.
#
# EVIDENCE-OF: R-03108-63659 The English language error message for
# foreign key DML errors is usually "foreign key mismatch" but can also
# be "no such table" if the parent table does not exist.
#
# EVIDENCE-OF: R-60781-26576 Foreign key DML errors are may be reported
# if: The parent table does not exist, or The parent key columns named
# in the foreign key constraint do not exist, or The parent key columns
# named in the foreign key constraint are not the primary key of the
# parent table and are not subject to a unique constraint using
# collating sequence specified in the CREATE TABLE, or The child table
# references the primary key of the parent without specifying the
# primary key columns and the number of primary key columns in the
# parent do not match the number of child key columns.
#
do_test e_fkey-20.1 {
execsql {
CREATE TABLE c1(c REFERENCES nosuchtable, d);
CREATE TABLE p2(a, b, UNIQUE(a, b));
CREATE TABLE c2(c, d, FOREIGN KEY(c, d) REFERENCES p2(a, x));
CREATE TABLE p3(a PRIMARY KEY, b);
CREATE TABLE c3(c REFERENCES p3(b), d);
CREATE TABLE p4(a PRIMARY KEY, b);
CREATE UNIQUE INDEX p4i ON p4(b COLLATE nocase);
CREATE TABLE c4(c REFERENCES p4(b), d);
CREATE TABLE p5(a PRIMARY KEY, b COLLATE nocase);
CREATE UNIQUE INDEX p5i ON p5(b COLLATE binary);
CREATE TABLE c5(c REFERENCES p5(b), d);
CREATE TABLE p6(a PRIMARY KEY, b);
CREATE TABLE c6(c, d, FOREIGN KEY(c, d) REFERENCES p6);
CREATE TABLE p7(a, b, PRIMARY KEY(a, b));
CREATE TABLE c7(c, d REFERENCES p7);
}
} {}
foreach {tn tbl ptbl err} {
2 c1 {} "no such table: main.nosuchtable"
3 c2 p2 "foreign key mismatch"
4 c3 p3 "foreign key mismatch"
5 c4 p4 "foreign key mismatch"
6 c5 p5 "foreign key mismatch"
7 c6 p6 "foreign key mismatch"
8 c7 p7 "foreign key mismatch"
} {
do_test e_fkey-20.$tn.1 {
catchsql "INSERT INTO $tbl VALUES('a', 'b')"
} [list 1 $err]
do_test e_fkey-20.$tn.2 {
catchsql "UPDATE $tbl SET c = ?, d = ?"
} [list 1 $err]
do_test e_fkey-20.$tn.3 {
catchsql "INSERT INTO $tbl SELECT ?, ?"
} [list 1 $err]
if {$ptbl ne ""} {
do_test e_fkey-20.$tn.4 {
catchsql "DELETE FROM $ptbl"
} [list 1 $err]
do_test e_fkey-20.$tn.5 {
catchsql "UPDATE $ptbl SET a = ?, b = ?"
} [list 1 $err]
do_test e_fkey-20.$tn.6 {
catchsql "INSERT INTO $ptbl SELECT ?, ?"
} [list 1 $err]
}
}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-19353-43643
#
# Test the example of foreign key mismatch errors caused by implicitly
# mapping a child key to the primary key of the parent table when the
# child key consists of a different number of columns to that primary key.
#
drop_all_tables
do_test e_fkey-21.1 {
execsql {
CREATE TABLE parent2(a, b, PRIMARY KEY(a,b));
CREATE TABLE child8(x, y, FOREIGN KEY(x,y) REFERENCES parent2); -- Ok
CREATE TABLE child9(x REFERENCES parent2); -- Err
CREATE TABLE child10(x,y,z, FOREIGN KEY(x,y,z) REFERENCES parent2); -- Err
}
} {}
do_test e_fkey-21.2 {
execsql {
INSERT INTO parent2 VALUES('I', 'II');
INSERT INTO child8 VALUES('I', 'II');
}
} {}
do_test e_fkey-21.3 {
catchsql { INSERT INTO child9 VALUES('I') }
} {1 {foreign key mismatch}}
do_test e_fkey-21.4 {
catchsql { INSERT INTO child9 VALUES('II') }
} {1 {foreign key mismatch}}
do_test e_fkey-21.5 {
catchsql { INSERT INTO child9 VALUES(NULL) }
} {1 {foreign key mismatch}}
do_test e_fkey-21.6 {
catchsql { INSERT INTO child10 VALUES('I', 'II', 'III') }
} {1 {foreign key mismatch}}
do_test e_fkey-21.7 {
catchsql { INSERT INTO child10 VALUES(1, 2, 3) }
} {1 {foreign key mismatch}}
do_test e_fkey-21.8 {
catchsql { INSERT INTO child10 VALUES(NULL, NULL, NULL) }
} {1 {foreign key mismatch}}
#-------------------------------------------------------------------------
# Test errors that are reported when creating the child table.
# Specifically:
#
# * different number of child and parent key columns, and
# * child columns that do not exist.
#
# EVIDENCE-OF: R-23682-59820 By contrast, if foreign key errors can be
# recognized simply by looking at the definition of the child table and
# without having to consult the parent table definition, then the CREATE
# TABLE statement for the child table fails.
#
# These errors are reported whether or not FK support is enabled.
#
# EVIDENCE-OF: R-33883-28833 Foreign key DDL errors are reported
# regardless of whether or not foreign key constraints are enabled when
# the table is created.
#
drop_all_tables
foreach fk [list OFF ON] {
execsql "PRAGMA foreign_keys = $fk"
set i 0
foreach {sql error} {
"CREATE TABLE child1(a, b, FOREIGN KEY(a, b) REFERENCES p(c))"
{number of columns in foreign key does not match the number of columns in the referenced table}
"CREATE TABLE child2(a, b, FOREIGN KEY(a, b) REFERENCES p(c, d, e))"
{number of columns in foreign key does not match the number of columns in the referenced table}
"CREATE TABLE child2(a, b, FOREIGN KEY(a, c) REFERENCES p(c, d))"
{unknown column "c" in foreign key definition}
"CREATE TABLE child2(a, b, FOREIGN KEY(c, b) REFERENCES p(c, d))"
{unknown column "c" in foreign key definition}
} {
do_test e_fkey-22.$fk.[incr i] {
catchsql $sql
} [list 1 $error]
}
}
#-------------------------------------------------------------------------
# Test that a REFERENCING clause that does not specify parent key columns
# implicitly maps to the primary key of the parent table.
#
# EVIDENCE-OF: R-43879-08025 Attaching a "REFERENCES <parent-table>"
# clause to a column definition creates a foreign
# key constraint that maps the column to the primary key of
# <parent-table>.
#
do_test e_fkey-23.1 {
execsql {
CREATE TABLE p1(a, b, PRIMARY KEY(a, b));
CREATE TABLE p2(a, b PRIMARY KEY);
CREATE TABLE c1(c, d, FOREIGN KEY(c, d) REFERENCES p1);
CREATE TABLE c2(a, b REFERENCES p2);
}
} {}
proc test_efkey_60 {tn isError sql} {
do_test e_fkey-23.$tn "
catchsql {$sql}
" [lindex {{0 {}} {1 {foreign key constraint failed}}} $isError]
}
test_efkey_60 2 1 "INSERT INTO c1 VALUES(239, 231)"
test_efkey_60 3 0 "INSERT INTO p1 VALUES(239, 231)"
test_efkey_60 4 0 "INSERT INTO c1 VALUES(239, 231)"
test_efkey_60 5 1 "INSERT INTO c2 VALUES(239, 231)"
test_efkey_60 6 0 "INSERT INTO p2 VALUES(239, 231)"
test_efkey_60 7 0 "INSERT INTO c2 VALUES(239, 231)"
#-------------------------------------------------------------------------
# Test that an index on on the child key columns of an FK constraint
# is optional.
#
# EVIDENCE-OF: R-15417-28014 Indices are not required for child key
# columns
#
# Also test that if an index is created on the child key columns, it does
# not make a difference whether or not it is a UNIQUE index.
#
# EVIDENCE-OF: R-15741-50893 The child key index does not have to be
# (and usually will not be) a UNIQUE index.
#
drop_all_tables
do_test e_fkey-24.1 {
execsql {
CREATE TABLE parent(x, y, UNIQUE(y, x));
CREATE TABLE c1(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y));
CREATE TABLE c2(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y));
CREATE TABLE c3(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y));
CREATE INDEX c2i ON c2(a, b);
CREATE UNIQUE INDEX c3i ON c2(b, a);
}
} {}
proc test_efkey_61 {tn isError sql} {
do_test e_fkey-24.$tn "
catchsql {$sql}
" [lindex {{0 {}} {1 {foreign key constraint failed}}} $isError]
}
foreach {tn c} [list 2 c1 3 c2 4 c3] {
test_efkey_61 $tn.1 1 "INSERT INTO $c VALUES(1, 2)"
test_efkey_61 $tn.2 0 "INSERT INTO parent VALUES(1, 2)"
test_efkey_61 $tn.3 0 "INSERT INTO $c VALUES(1, 2)"
execsql "DELETE FROM $c ; DELETE FROM parent"
}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-00279-52283
#
# Test an example showing that when a row is deleted from the parent
# table, the child table is queried for orphaned rows as follows:
#
# SELECT rowid FROM track WHERE trackartist = ?
#
# EVIDENCE-OF: R-23302-30956 If this SELECT returns any rows at all,
# then SQLite concludes that deleting the row from the parent table
# would violate the foreign key constraint and returns an error.
#
do_test e_fkey-25.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER,
FOREIGN KEY(trackartist) REFERENCES artist(artistid)
);
}
} {}
do_execsql_test e_fkey-25.2 {
PRAGMA foreign_keys = OFF;
EXPLAIN QUERY PLAN DELETE FROM artist WHERE 1;
EXPLAIN QUERY PLAN SELECT rowid FROM track WHERE trackartist = ?;
} {
0 0 0 {SCAN TABLE artist (~1000000 rows)}
0 0 0 {SCAN TABLE track (~100000 rows)}
}
do_execsql_test e_fkey-25.3 {
PRAGMA foreign_keys = ON;
EXPLAIN QUERY PLAN DELETE FROM artist WHERE 1;
} {
0 0 0 {SCAN TABLE artist (~1000000 rows)}
0 0 0 {SCAN TABLE track (~100000 rows)}
}
do_test e_fkey-25.4 {
execsql {
INSERT INTO artist VALUES(5, 'artist 5');
INSERT INTO artist VALUES(6, 'artist 6');
INSERT INTO artist VALUES(7, 'artist 7');
INSERT INTO track VALUES(1, 'track 1', 5);
INSERT INTO track VALUES(2, 'track 2', 6);
}
} {}
do_test e_fkey-25.5 {
concat \
[execsql { SELECT rowid FROM track WHERE trackartist = 5 }] \
[catchsql { DELETE FROM artist WHERE artistid = 5 }]
} {1 1 {foreign key constraint failed}}
do_test e_fkey-25.6 {
concat \
[execsql { SELECT rowid FROM track WHERE trackartist = 7 }] \
[catchsql { DELETE FROM artist WHERE artistid = 7 }]
} {0 {}}
do_test e_fkey-25.7 {
concat \
[execsql { SELECT rowid FROM track WHERE trackartist = 6 }] \
[catchsql { DELETE FROM artist WHERE artistid = 6 }]
} {2 1 {foreign key constraint failed}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-47936-10044 Or, more generally:
# SELECT rowid FROM <child-table> WHERE <child-key> = :parent_key_value
#
# Test that when a row is deleted from the parent table of an FK
# constraint, the child table is queried for orphaned rows. The
# query is equivalent to:
#
# SELECT rowid FROM <child-table> WHERE <child-key> = :parent_key_value
#
# Also test that when a row is inserted into the parent table, or when the
# parent key values of an existing row are modified, a query equivalent
# to the following is planned. In some cases it is not executed, but it
# is always planned.
#
# SELECT rowid FROM <child-table> WHERE <child-key> = :parent_key_value
#
# EVIDENCE-OF: R-61616-46700 Similar queries may be run if the content
# of the parent key is modified or a new row is inserted into the parent
# table.
#
#
drop_all_tables
do_test e_fkey-26.1 {
execsql { CREATE TABLE parent(x, y, UNIQUE(y, x)) }
} {}
foreach {tn sql} {
2 {
CREATE TABLE child(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y))
}
3 {
CREATE TABLE child(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y));
CREATE INDEX childi ON child(a, b);
}
4 {
CREATE TABLE child(a, b, FOREIGN KEY(a, b) REFERENCES parent(x, y));
CREATE UNIQUE INDEX childi ON child(b, a);
}
} {
execsql $sql
execsql {PRAGMA foreign_keys = OFF}
set delete [concat \
[eqp "DELETE FROM parent WHERE 1"] \
[eqp "SELECT rowid FROM child WHERE a = ? AND b = ?"]
]
set update [concat \
[eqp "UPDATE parent SET x=?, y=?"] \
[eqp "SELECT rowid FROM child WHERE a = ? AND b = ?"] \
[eqp "SELECT rowid FROM child WHERE a = ? AND b = ?"]
]
execsql {PRAGMA foreign_keys = ON}
do_test e_fkey-26.$tn.1 { eqp "DELETE FROM parent WHERE 1" } $delete
do_test e_fkey-26.$tn.2 { eqp "UPDATE parent set x=?, y=?" } $update
execsql {DROP TABLE child}
}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-14553-34013
#
# Test the example schema at the end of section 3. Also test that is
# is "efficient". In this case "efficient" means that foreign key
# related operations on the parent table do not provoke linear scans.
#
drop_all_tables
do_test e_fkey-27.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER REFERENCES artist
);
CREATE INDEX trackindex ON track(trackartist);
}
} {}
do_test e_fkey-27.2 {
eqp { INSERT INTO artist VALUES(?, ?) }
} {}
do_execsql_test e_fkey-27.3 {
EXPLAIN QUERY PLAN UPDATE artist SET artistid = ?, artistname = ?
} {
0 0 0 {SCAN TABLE artist (~1000000 rows)}
0 0 0 {SEARCH TABLE track USING COVERING INDEX trackindex (trackartist=?) (~10 rows)}
0 0 0 {SEARCH TABLE track USING COVERING INDEX trackindex (trackartist=?) (~10 rows)}
}
do_execsql_test e_fkey-27.4 {
EXPLAIN QUERY PLAN DELETE FROM artist
} {
0 0 0 {SCAN TABLE artist (~1000000 rows)}
0 0 0 {SEARCH TABLE track USING COVERING INDEX trackindex (trackartist=?) (~10 rows)}
}
###########################################################################
### SECTION 4.1: Composite Foreign Key Constraints
###########################################################################
#-------------------------------------------------------------------------
# Check that parent and child keys must have the same number of columns.
#
# EVIDENCE-OF: R-41062-34431 Parent and child keys must have the same
# cardinality.
#
foreach {tn sql err} {
1 "CREATE TABLE c(jj REFERENCES p(x, y))"
{foreign key on jj should reference only one column of table p}
2 "CREATE TABLE c(jj REFERENCES p())" {near ")": syntax error}
3 "CREATE TABLE c(jj, FOREIGN KEY(jj) REFERENCES p(x, y))"
{number of columns in foreign key does not match the number of columns in the referenced table}
4 "CREATE TABLE c(jj, FOREIGN KEY(jj) REFERENCES p())"
{near ")": syntax error}
5 "CREATE TABLE c(ii, jj, FOREIGN KEY(jj, ii) REFERENCES p())"
{near ")": syntax error}
6 "CREATE TABLE c(ii, jj, FOREIGN KEY(jj, ii) REFERENCES p(x))"
{number of columns in foreign key does not match the number of columns in the referenced table}
7 "CREATE TABLE c(ii, jj, FOREIGN KEY(jj, ii) REFERENCES p(x,y,z))"
{number of columns in foreign key does not match the number of columns in the referenced table}
} {
drop_all_tables
do_test e_fkey-28.$tn [list catchsql $sql] [list 1 $err]
}
do_test e_fkey-28.8 {
drop_all_tables
execsql {
CREATE TABLE p(x PRIMARY KEY);
CREATE TABLE c(a, b, FOREIGN KEY(a,b) REFERENCES p);
}
catchsql {DELETE FROM p}
} {1 {foreign key mismatch}}
do_test e_fkey-28.9 {
drop_all_tables
execsql {
CREATE TABLE p(x, y, PRIMARY KEY(x,y));
CREATE TABLE c(a REFERENCES p);
}
catchsql {DELETE FROM p}
} {1 {foreign key mismatch}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-24676-09859
#
# Test the example schema in the "Composite Foreign Key Constraints"
# section.
#
do_test e_fkey-29.1 {
execsql {
CREATE TABLE album(
albumartist TEXT,
albumname TEXT,
albumcover BINARY,
PRIMARY KEY(albumartist, albumname)
);
CREATE TABLE song(
songid INTEGER,
songartist TEXT,
songalbum TEXT,
songname TEXT,
FOREIGN KEY(songartist, songalbum) REFERENCES album(albumartist,albumname)
);
}
} {}
do_test e_fkey-29.2 {
execsql {
INSERT INTO album VALUES('Elvis Presley', 'Elvis'' Christmas Album', NULL);
INSERT INTO song VALUES(
1, 'Elvis Presley', 'Elvis'' Christmas Album', 'Here Comes Santa Clause'
);
}
} {}
do_test e_fkey-29.3 {
catchsql {
INSERT INTO song VALUES(2, 'Elvis Presley', 'Elvis Is Back!', 'Fever');
}
} {1 {foreign key constraint failed}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-33626-48418 In SQLite, if any of the child key columns
# (in this case songartist and songalbum) are NULL, then there is no
# requirement for a corresponding row in the parent table.
#
do_test e_fkey-30.1 {
execsql {
INSERT INTO song VALUES(2, 'Elvis Presley', NULL, 'Fever');
INSERT INTO song VALUES(3, NULL, 'Elvis Is Back', 'Soldier Boy');
}
} {}
###########################################################################
### SECTION 4.2: Deferred Foreign Key Constraints
###########################################################################
#-------------------------------------------------------------------------
# Test that if a statement violates an immediate FK constraint, and the
# database does not satisfy the FK constraint once all effects of the
# statement have been applied, an error is reported and the effects of
# the statement rolled back.
#
# EVIDENCE-OF: R-09323-30470 If a statement modifies the contents of the
# database so that an immediate foreign key constraint is in violation
# at the conclusion the statement, an exception is thrown and the
# effects of the statement are reverted.
#
drop_all_tables
do_test e_fkey-31.1 {
execsql {
CREATE TABLE king(a, b, PRIMARY KEY(a));
CREATE TABLE prince(c REFERENCES king, d);
}
} {}
do_test e_fkey-31.2 {
# Execute a statement that violates the immediate FK constraint.
catchsql { INSERT INTO prince VALUES(1, 2) }
} {1 {foreign key constraint failed}}
do_test e_fkey-31.3 {
# This time, use a trigger to fix the constraint violation before the
# statement has finished executing. Then execute the same statement as
# in the previous test case. This time, no error.
execsql {
CREATE TRIGGER kt AFTER INSERT ON prince WHEN
NOT EXISTS (SELECT a FROM king WHERE a = new.c)
BEGIN
INSERT INTO king VALUES(new.c, NULL);
END
}
execsql { INSERT INTO prince VALUES(1, 2) }
} {}
# Test that operating inside a transaction makes no difference to
# immediate constraint violation handling.
do_test e_fkey-31.4 {
execsql {
BEGIN;
INSERT INTO prince VALUES(2, 3);
DROP TRIGGER kt;
}
catchsql { INSERT INTO prince VALUES(3, 4) }
} {1 {foreign key constraint failed}}
do_test e_fkey-31.5 {
execsql {
COMMIT;
SELECT * FROM king;
}
} {1 {} 2 {}}
#-------------------------------------------------------------------------
# Test that if a deferred constraint is violated within a transaction,
# nothing happens immediately and the database is allowed to persist
# in a state that does not satisfy the FK constraint. However attempts
# to COMMIT the transaction fail until the FK constraint is satisfied.
#
# EVIDENCE-OF: R-49178-21358 By contrast, if a statement modifies the
# contents of the database such that a deferred foreign key constraint
# is violated, the violation is not reported immediately.
#
# EVIDENCE-OF: R-39692-12488 Deferred foreign key constraints are not
# checked until the transaction tries to COMMIT.
#
# EVIDENCE-OF: R-55147-47664 For as long as the user has an open
# transaction, the database is allowed to exist in a state that violates
# any number of deferred foreign key constraints.
#
# EVIDENCE-OF: R-29604-30395 However, COMMIT will fail as long as
# foreign key constraints remain in violation.
#
proc test_efkey_34 {tn isError sql} {
do_test e_fkey-32.$tn "
catchsql {$sql}
" [lindex {{0 {}} {1 {foreign key constraint failed}}} $isError]
}
drop_all_tables
test_efkey_34 1 0 {
CREATE TABLE ll(k PRIMARY KEY);
CREATE TABLE kk(c REFERENCES ll DEFERRABLE INITIALLY DEFERRED);
}
test_efkey_34 2 0 "BEGIN"
test_efkey_34 3 0 "INSERT INTO kk VALUES(5)"
test_efkey_34 4 0 "INSERT INTO kk VALUES(10)"
test_efkey_34 5 1 "COMMIT"
test_efkey_34 6 0 "INSERT INTO ll VALUES(10)"
test_efkey_34 7 1 "COMMIT"
test_efkey_34 8 0 "INSERT INTO ll VALUES(5)"
test_efkey_34 9 0 "COMMIT"
#-------------------------------------------------------------------------
# When not running inside a transaction, a deferred constraint is similar
# to an immediate constraint (violations are reported immediately).
#
# EVIDENCE-OF: R-56844-61705 If the current statement is not inside an
# explicit transaction (a BEGIN/COMMIT/ROLLBACK block), then an implicit
# transaction is committed as soon as the statement has finished
# executing. In this case deferred constraints behave the same as
# immediate constraints.
#
drop_all_tables
proc test_efkey_35 {tn isError sql} {
do_test e_fkey-33.$tn "
catchsql {$sql}
" [lindex {{0 {}} {1 {foreign key constraint failed}}} $isError]
}
do_test e_fkey-33.1 {
execsql {
CREATE TABLE parent(x, y);
CREATE UNIQUE INDEX pi ON parent(x, y);
CREATE TABLE child(a, b,
FOREIGN KEY(a, b) REFERENCES parent(x, y) DEFERRABLE INITIALLY DEFERRED
);
}
} {}
test_efkey_35 2 1 "INSERT INTO child VALUES('x', 'y')"
test_efkey_35 3 0 "INSERT INTO parent VALUES('x', 'y')"
test_efkey_35 4 0 "INSERT INTO child VALUES('x', 'y')"
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-12782-61841
#
# Test that an FK constraint is made deferred by adding the following
# to the definition:
#
# DEFERRABLE INITIALLY DEFERRED
#
# EVIDENCE-OF: R-09005-28791
#
# Also test that adding any of the following to a foreign key definition
# makes the constraint IMMEDIATE:
#
# NOT DEFERRABLE INITIALLY DEFERRED
# NOT DEFERRABLE INITIALLY IMMEDIATE
# NOT DEFERRABLE
# DEFERRABLE INITIALLY IMMEDIATE
# DEFERRABLE
#
# Foreign keys are IMMEDIATE by default (if there is no DEFERRABLE or NOT
# DEFERRABLE clause).
#
# EVIDENCE-OF: R-35290-16460 Foreign key constraints are immediate by
# default.
#
# EVIDENCE-OF: R-30323-21917 Each foreign key constraint in SQLite is
# classified as either immediate or deferred.
#
drop_all_tables
do_test e_fkey-34.1 {
execsql {
CREATE TABLE parent(x, y, z, PRIMARY KEY(x,y,z));
CREATE TABLE c1(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent NOT DEFERRABLE INITIALLY DEFERRED
);
CREATE TABLE c2(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent NOT DEFERRABLE INITIALLY IMMEDIATE
);
CREATE TABLE c3(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent NOT DEFERRABLE
);
CREATE TABLE c4(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent DEFERRABLE INITIALLY IMMEDIATE
);
CREATE TABLE c5(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent DEFERRABLE
);
CREATE TABLE c6(a, b, c, FOREIGN KEY(a, b, c) REFERENCES parent);
-- This FK constraint is the only deferrable one.
CREATE TABLE c7(a, b, c,
FOREIGN KEY(a, b, c) REFERENCES parent DEFERRABLE INITIALLY DEFERRED
);
INSERT INTO parent VALUES('a', 'b', 'c');
INSERT INTO parent VALUES('d', 'e', 'f');
INSERT INTO parent VALUES('g', 'h', 'i');
INSERT INTO parent VALUES('j', 'k', 'l');
INSERT INTO parent VALUES('m', 'n', 'o');
INSERT INTO parent VALUES('p', 'q', 'r');
INSERT INTO parent VALUES('s', 't', 'u');
INSERT INTO c1 VALUES('a', 'b', 'c');
INSERT INTO c2 VALUES('d', 'e', 'f');
INSERT INTO c3 VALUES('g', 'h', 'i');
INSERT INTO c4 VALUES('j', 'k', 'l');
INSERT INTO c5 VALUES('m', 'n', 'o');
INSERT INTO c6 VALUES('p', 'q', 'r');
INSERT INTO c7 VALUES('s', 't', 'u');
}
} {}
proc test_efkey_29 {tn sql isError} {
do_test e_fkey-34.$tn "catchsql {$sql}" [
lindex {{0 {}} {1 {foreign key constraint failed}}} $isError
]
}
test_efkey_29 2 "BEGIN" 0
test_efkey_29 3 "DELETE FROM parent WHERE x = 'a'" 1
test_efkey_29 4 "DELETE FROM parent WHERE x = 'd'" 1
test_efkey_29 5 "DELETE FROM parent WHERE x = 'g'" 1
test_efkey_29 6 "DELETE FROM parent WHERE x = 'j'" 1
test_efkey_29 7 "DELETE FROM parent WHERE x = 'm'" 1
test_efkey_29 8 "DELETE FROM parent WHERE x = 'p'" 1
test_efkey_29 9 "DELETE FROM parent WHERE x = 's'" 0
test_efkey_29 10 "COMMIT" 1
test_efkey_29 11 "ROLLBACK" 0
test_efkey_29 9 "BEGIN" 0
test_efkey_29 10 "UPDATE parent SET z = 'z' WHERE z = 'c'" 1
test_efkey_29 11 "UPDATE parent SET z = 'z' WHERE z = 'f'" 1
test_efkey_29 12 "UPDATE parent SET z = 'z' WHERE z = 'i'" 1
test_efkey_29 13 "UPDATE parent SET z = 'z' WHERE z = 'l'" 1
test_efkey_29 14 "UPDATE parent SET z = 'z' WHERE z = 'o'" 1
test_efkey_29 15 "UPDATE parent SET z = 'z' WHERE z = 'r'" 1
test_efkey_29 16 "UPDATE parent SET z = 'z' WHERE z = 'u'" 0
test_efkey_29 17 "COMMIT" 1
test_efkey_29 18 "ROLLBACK" 0
test_efkey_29 17 "BEGIN" 0
test_efkey_29 18 "INSERT INTO c1 VALUES(1, 2, 3)" 1
test_efkey_29 19 "INSERT INTO c2 VALUES(1, 2, 3)" 1
test_efkey_29 20 "INSERT INTO c3 VALUES(1, 2, 3)" 1
test_efkey_29 21 "INSERT INTO c4 VALUES(1, 2, 3)" 1
test_efkey_29 22 "INSERT INTO c5 VALUES(1, 2, 3)" 1
test_efkey_29 22 "INSERT INTO c6 VALUES(1, 2, 3)" 1
test_efkey_29 22 "INSERT INTO c7 VALUES(1, 2, 3)" 0
test_efkey_29 23 "COMMIT" 1
test_efkey_29 24 "INSERT INTO parent VALUES(1, 2, 3)" 0
test_efkey_29 25 "COMMIT" 0
test_efkey_29 26 "BEGIN" 0
test_efkey_29 27 "UPDATE c1 SET a = 10" 1
test_efkey_29 28 "UPDATE c2 SET a = 10" 1
test_efkey_29 29 "UPDATE c3 SET a = 10" 1
test_efkey_29 30 "UPDATE c4 SET a = 10" 1
test_efkey_29 31 "UPDATE c5 SET a = 10" 1
test_efkey_29 31 "UPDATE c6 SET a = 10" 1
test_efkey_29 31 "UPDATE c7 SET a = 10" 0
test_efkey_29 32 "COMMIT" 1
test_efkey_29 33 "ROLLBACK" 0
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-24499-57071
#
# Test an example from foreignkeys.html dealing with a deferred foreign
# key constraint.
#
do_test e_fkey-35.1 {
drop_all_tables
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER REFERENCES artist(artistid) DEFERRABLE INITIALLY DEFERRED
);
}
} {}
do_test e_fkey-35.2 {
execsql {
BEGIN;
INSERT INTO track VALUES(1, 'White Christmas', 5);
}
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-35.3 {
execsql {
INSERT INTO artist VALUES(5, 'Bing Crosby');
COMMIT;
}
} {}
#-------------------------------------------------------------------------
# Verify that a nested savepoint may be released without satisfying
# deferred foreign key constraints.
#
# EVIDENCE-OF: R-07223-48323 A nested savepoint transaction may be
# RELEASEd while the database is in a state that does not satisfy a
# deferred foreign key constraint.
#
drop_all_tables
do_test e_fkey-36.1 {
execsql {
CREATE TABLE t1(a PRIMARY KEY,
b REFERENCES t1 DEFERRABLE INITIALLY DEFERRED
);
INSERT INTO t1 VALUES(1, 1);
INSERT INTO t1 VALUES(2, 2);
INSERT INTO t1 VALUES(3, 3);
}
} {}
do_test e_fkey-36.2 {
execsql {
BEGIN;
SAVEPOINT one;
INSERT INTO t1 VALUES(4, 5);
RELEASE one;
}
} {}
do_test e_fkey-36.3 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-36.4 {
execsql {
UPDATE t1 SET a = 5 WHERE a = 4;
COMMIT;
}
} {}
#-------------------------------------------------------------------------
# Check that a transaction savepoint (an outermost savepoint opened when
# the database was in auto-commit mode) cannot be released without
# satisfying deferred foreign key constraints. It may be rolled back.
#
# EVIDENCE-OF: R-44295-13823 A transaction savepoint (a non-nested
# savepoint that was opened while there was not currently an open
# transaction), on the other hand, is subject to the same restrictions
# as a COMMIT - attempting to RELEASE it while the database is in such a
# state will fail.
#
do_test e_fkey-37.1 {
execsql {
SAVEPOINT one;
SAVEPOINT two;
INSERT INTO t1 VALUES(6, 7);
RELEASE two;
}
} {}
do_test e_fkey-37.2 {
catchsql {RELEASE one}
} {1 {foreign key constraint failed}}
do_test e_fkey-37.3 {
execsql {
UPDATE t1 SET a = 7 WHERE a = 6;
RELEASE one;
}
} {}
do_test e_fkey-37.4 {
execsql {
SAVEPOINT one;
SAVEPOINT two;
INSERT INTO t1 VALUES(9, 10);
RELEASE two;
}
} {}
do_test e_fkey-37.5 {
catchsql {RELEASE one}
} {1 {foreign key constraint failed}}
do_test e_fkey-37.6 {
execsql {ROLLBACK TO one ; RELEASE one}
} {}
#-------------------------------------------------------------------------
# Test that if a COMMIT operation fails due to deferred foreign key
# constraints, any nested savepoints remain open.
#
# EVIDENCE-OF: R-37736-42616 If a COMMIT statement (or the RELEASE of a
# transaction SAVEPOINT) fails because the database is currently in a
# state that violates a deferred foreign key constraint and there are
# currently nested savepoints, the nested savepoints remain open.
#
do_test e_fkey-38.1 {
execsql {
DELETE FROM t1 WHERE a>3;
SELECT * FROM t1;
}
} {1 1 2 2 3 3}
do_test e_fkey-38.2 {
execsql {
BEGIN;
INSERT INTO t1 VALUES(4, 4);
SAVEPOINT one;
INSERT INTO t1 VALUES(5, 6);
SELECT * FROM t1;
}
} {1 1 2 2 3 3 4 4 5 6}
do_test e_fkey-38.3 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-38.4 {
execsql {
ROLLBACK TO one;
COMMIT;
SELECT * FROM t1;
}
} {1 1 2 2 3 3 4 4}
do_test e_fkey-38.5 {
execsql {
SAVEPOINT a;
INSERT INTO t1 VALUES(5, 5);
SAVEPOINT b;
INSERT INTO t1 VALUES(6, 7);
SAVEPOINT c;
INSERT INTO t1 VALUES(7, 8);
}
} {}
do_test e_fkey-38.6 {
catchsql {RELEASE a}
} {1 {foreign key constraint failed}}
do_test e_fkey-38.7 {
execsql {ROLLBACK TO c}
catchsql {RELEASE a}
} {1 {foreign key constraint failed}}
do_test e_fkey-38.8 {
execsql {
ROLLBACK TO b;
RELEASE a;
SELECT * FROM t1;
}
} {1 1 2 2 3 3 4 4 5 5}
###########################################################################
### SECTION 4.3: ON DELETE and ON UPDATE Actions
###########################################################################
#-------------------------------------------------------------------------
# Test that configured ON DELETE and ON UPDATE actions take place when
# deleting or modifying rows of the parent table, respectively.
#
# EVIDENCE-OF: R-48270-44282 Foreign key ON DELETE and ON UPDATE clauses
# are used to configure actions that take place when deleting rows from
# the parent table (ON DELETE), or modifying the parent key values of
# existing rows (ON UPDATE).
#
# Test that a single FK constraint may have different actions configured
# for ON DELETE and ON UPDATE.
#
# EVIDENCE-OF: R-48124-63225 A single foreign key constraint may have
# different actions configured for ON DELETE and ON UPDATE.
#
do_test e_fkey-39.1 {
execsql {
CREATE TABLE p(a, b PRIMARY KEY, c);
CREATE TABLE c1(d, e, f DEFAULT 'k0' REFERENCES p
ON UPDATE SET DEFAULT
ON DELETE SET NULL
);
INSERT INTO p VALUES(0, 'k0', '');
INSERT INTO p VALUES(1, 'k1', 'I');
INSERT INTO p VALUES(2, 'k2', 'II');
INSERT INTO p VALUES(3, 'k3', 'III');
INSERT INTO c1 VALUES(1, 'xx', 'k1');
INSERT INTO c1 VALUES(2, 'xx', 'k2');
INSERT INTO c1 VALUES(3, 'xx', 'k3');
}
} {}
do_test e_fkey-39.2 {
execsql {
UPDATE p SET b = 'k4' WHERE a = 1;
SELECT * FROM c1;
}
} {1 xx k0 2 xx k2 3 xx k3}
do_test e_fkey-39.3 {
execsql {
DELETE FROM p WHERE a = 2;
SELECT * FROM c1;
}
} {1 xx k0 2 xx {} 3 xx k3}
do_test e_fkey-39.4 {
execsql {
CREATE UNIQUE INDEX pi ON p(c);
REPLACE INTO p VALUES(5, 'k5', 'III');
SELECT * FROM c1;
}
} {1 xx k0 2 xx {} 3 xx {}}
#-------------------------------------------------------------------------
# Each foreign key in the system has an ON UPDATE and ON DELETE action,
# either "NO ACTION", "RESTRICT", "SET NULL", "SET DEFAULT" or "CASCADE".
#
# EVIDENCE-OF: R-33326-45252 The ON DELETE and ON UPDATE action
# associated with each foreign key in an SQLite database is one of "NO
# ACTION", "RESTRICT", "SET NULL", "SET DEFAULT" or "CASCADE".
#
# If none is specified explicitly, "NO ACTION" is the default.
#
# EVIDENCE-OF: R-19803-45884 If an action is not explicitly specified,
# it defaults to "NO ACTION".
#
drop_all_tables
do_test e_fkey-40.1 {
execsql {
CREATE TABLE parent(x PRIMARY KEY, y);
CREATE TABLE child1(a,
b REFERENCES parent ON UPDATE NO ACTION ON DELETE RESTRICT
);
CREATE TABLE child2(a,
b REFERENCES parent ON UPDATE RESTRICT ON DELETE SET NULL
);
CREATE TABLE child3(a,
b REFERENCES parent ON UPDATE SET NULL ON DELETE SET DEFAULT
);
CREATE TABLE child4(a,
b REFERENCES parent ON UPDATE SET DEFAULT ON DELETE CASCADE
);
-- Create some foreign keys that use the default action - "NO ACTION"
CREATE TABLE child5(a, b REFERENCES parent ON UPDATE CASCADE);
CREATE TABLE child6(a, b REFERENCES parent ON DELETE RESTRICT);
CREATE TABLE child7(a, b REFERENCES parent ON DELETE NO ACTION);
CREATE TABLE child8(a, b REFERENCES parent ON UPDATE NO ACTION);
}
} {}
foreach {tn zTab lRes} {
2 child1 {0 0 parent b {} {NO ACTION} RESTRICT NONE}
3 child2 {0 0 parent b {} RESTRICT {SET NULL} NONE}
4 child3 {0 0 parent b {} {SET NULL} {SET DEFAULT} NONE}
5 child4 {0 0 parent b {} {SET DEFAULT} CASCADE NONE}
6 child5 {0 0 parent b {} CASCADE {NO ACTION} NONE}
7 child6 {0 0 parent b {} {NO ACTION} RESTRICT NONE}
8 child7 {0 0 parent b {} {NO ACTION} {NO ACTION} NONE}
9 child8 {0 0 parent b {} {NO ACTION} {NO ACTION} NONE}
} {
do_test e_fkey-40.$tn { execsql "PRAGMA foreign_key_list($zTab)" } $lRes
}
#-------------------------------------------------------------------------
# Test that "NO ACTION" means that nothing happens to a child row when
# it's parent row is updated or deleted.
#
# EVIDENCE-OF: R-19971-54976 Configuring "NO ACTION" means just that:
# when a parent key is modified or deleted from the database, no special
# action is taken.
#
drop_all_tables
do_test e_fkey-41.1 {
execsql {
CREATE TABLE parent(p1, p2, PRIMARY KEY(p1, p2));
CREATE TABLE child(c1, c2,
FOREIGN KEY(c1, c2) REFERENCES parent
ON UPDATE NO ACTION
ON DELETE NO ACTION
DEFERRABLE INITIALLY DEFERRED
);
INSERT INTO parent VALUES('j', 'k');
INSERT INTO parent VALUES('l', 'm');
INSERT INTO child VALUES('j', 'k');
INSERT INTO child VALUES('l', 'm');
}
} {}
do_test e_fkey-41.2 {
execsql {
BEGIN;
UPDATE parent SET p1='k' WHERE p1='j';
DELETE FROM parent WHERE p1='l';
SELECT * FROM child;
}
} {j k l m}
do_test e_fkey-41.3 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-41.4 {
execsql ROLLBACK
} {}
#-------------------------------------------------------------------------
# Test that "RESTRICT" means the application is prohibited from deleting
# or updating a parent table row when there exists one or more child keys
# mapped to it.
#
# EVIDENCE-OF: R-04272-38653 The "RESTRICT" action means that the
# application is prohibited from deleting (for ON DELETE RESTRICT) or
# modifying (for ON UPDATE RESTRICT) a parent key when there exists one
# or more child keys mapped to it.
#
drop_all_tables
do_test e_fkey-41.1 {
execsql {
CREATE TABLE parent(p1, p2);
CREATE UNIQUE INDEX parent_i ON parent(p1, p2);
CREATE TABLE child1(c1, c2,
FOREIGN KEY(c2, c1) REFERENCES parent(p1, p2) ON DELETE RESTRICT
);
CREATE TABLE child2(c1, c2,
FOREIGN KEY(c2, c1) REFERENCES parent(p1, p2) ON UPDATE RESTRICT
);
}
} {}
do_test e_fkey-41.2 {
execsql {
INSERT INTO parent VALUES('a', 'b');
INSERT INTO parent VALUES('c', 'd');
INSERT INTO child1 VALUES('b', 'a');
INSERT INTO child2 VALUES('d', 'c');
}
} {}
do_test e_fkey-41.3 {
catchsql { DELETE FROM parent WHERE p1 = 'a' }
} {1 {foreign key constraint failed}}
do_test e_fkey-41.4 {
catchsql { UPDATE parent SET p2 = 'e' WHERE p1 = 'c' }
} {1 {foreign key constraint failed}}
#-------------------------------------------------------------------------
# Test that RESTRICT is slightly different from NO ACTION for IMMEDIATE
# constraints, in that it is enforced immediately, not at the end of the
# statement.
#
# EVIDENCE-OF: R-37997-42187 The difference between the effect of a
# RESTRICT action and normal foreign key constraint enforcement is that
# the RESTRICT action processing happens as soon as the field is updated
# - not at the end of the current statement as it would with an
# immediate constraint, or at the end of the current transaction as it
# would with a deferred constraint.
#
drop_all_tables
do_test e_fkey-42.1 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child1(c REFERENCES parent ON UPDATE RESTRICT);
CREATE TABLE child2(c REFERENCES parent ON UPDATE NO ACTION);
INSERT INTO parent VALUES('key1');
INSERT INTO parent VALUES('key2');
INSERT INTO child1 VALUES('key1');
INSERT INTO child2 VALUES('key2');
CREATE TRIGGER parent_t AFTER UPDATE ON parent BEGIN
UPDATE child1 set c = new.x WHERE c = old.x;
UPDATE child2 set c = new.x WHERE c = old.x;
END;
}
} {}
do_test e_fkey-42.2 {
catchsql { UPDATE parent SET x = 'key one' WHERE x = 'key1' }
} {1 {foreign key constraint failed}}
do_test e_fkey-42.3 {
execsql {
UPDATE parent SET x = 'key two' WHERE x = 'key2';
SELECT * FROM child2;
}
} {{key two}}
drop_all_tables
do_test e_fkey-42.4 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child1(c REFERENCES parent ON DELETE RESTRICT);
CREATE TABLE child2(c REFERENCES parent ON DELETE NO ACTION);
INSERT INTO parent VALUES('key1');
INSERT INTO parent VALUES('key2');
INSERT INTO child1 VALUES('key1');
INSERT INTO child2 VALUES('key2');
CREATE TRIGGER parent_t AFTER DELETE ON parent BEGIN
UPDATE child1 SET c = NULL WHERE c = old.x;
UPDATE child2 SET c = NULL WHERE c = old.x;
END;
}
} {}
do_test e_fkey-42.5 {
catchsql { DELETE FROM parent WHERE x = 'key1' }
} {1 {foreign key constraint failed}}
do_test e_fkey-42.6 {
execsql {
DELETE FROM parent WHERE x = 'key2';
SELECT * FROM child2;
}
} {{}}
drop_all_tables
do_test e_fkey-42.7 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child1(c REFERENCES parent ON DELETE RESTRICT);
CREATE TABLE child2(c REFERENCES parent ON DELETE NO ACTION);
INSERT INTO parent VALUES('key1');
INSERT INTO parent VALUES('key2');
INSERT INTO child1 VALUES('key1');
INSERT INTO child2 VALUES('key2');
}
} {}
do_test e_fkey-42.8 {
catchsql { REPLACE INTO parent VALUES('key1') }
} {1 {foreign key constraint failed}}
do_test e_fkey-42.9 {
execsql {
REPLACE INTO parent VALUES('key2');
SELECT * FROM child2;
}
} {key2}
#-------------------------------------------------------------------------
# Test that RESTRICT is enforced immediately, even for a DEFERRED constraint.
#
# EVIDENCE-OF: R-24179-60523 Even if the foreign key constraint it is
# attached to is deferred, configuring a RESTRICT action causes SQLite
# to return an error immediately if a parent key with dependent child
# keys is deleted or modified.
#
drop_all_tables
do_test e_fkey-43.1 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child1(c REFERENCES parent ON UPDATE RESTRICT
DEFERRABLE INITIALLY DEFERRED
);
CREATE TABLE child2(c REFERENCES parent ON UPDATE NO ACTION
DEFERRABLE INITIALLY DEFERRED
);
INSERT INTO parent VALUES('key1');
INSERT INTO parent VALUES('key2');
INSERT INTO child1 VALUES('key1');
INSERT INTO child2 VALUES('key2');
BEGIN;
}
} {}
do_test e_fkey-43.2 {
catchsql { UPDATE parent SET x = 'key one' WHERE x = 'key1' }
} {1 {foreign key constraint failed}}
do_test e_fkey-43.3 {
execsql { UPDATE parent SET x = 'key two' WHERE x = 'key2' }
} {}
do_test e_fkey-43.4 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-43.5 {
execsql {
UPDATE child2 SET c = 'key two';
COMMIT;
}
} {}
drop_all_tables
do_test e_fkey-43.6 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child1(c REFERENCES parent ON DELETE RESTRICT
DEFERRABLE INITIALLY DEFERRED
);
CREATE TABLE child2(c REFERENCES parent ON DELETE NO ACTION
DEFERRABLE INITIALLY DEFERRED
);
INSERT INTO parent VALUES('key1');
INSERT INTO parent VALUES('key2');
INSERT INTO child1 VALUES('key1');
INSERT INTO child2 VALUES('key2');
BEGIN;
}
} {}
do_test e_fkey-43.7 {
catchsql { DELETE FROM parent WHERE x = 'key1' }
} {1 {foreign key constraint failed}}
do_test e_fkey-43.8 {
execsql { DELETE FROM parent WHERE x = 'key2' }
} {}
do_test e_fkey-43.9 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-43.10 {
execsql {
UPDATE child2 SET c = NULL;
COMMIT;
}
} {}
#-------------------------------------------------------------------------
# Test SET NULL actions.
#
# EVIDENCE-OF: R-03353-05327 If the configured action is "SET NULL",
# then when a parent key is deleted (for ON DELETE SET NULL) or modified
# (for ON UPDATE SET NULL), the child key columns of all rows in the
# child table that mapped to the parent key are set to contain SQL NULL
# values.
#
drop_all_tables
do_test e_fkey-44.1 {
execsql {
CREATE TABLE pA(x PRIMARY KEY);
CREATE TABLE cA(c REFERENCES pA ON DELETE SET NULL);
CREATE TABLE cB(c REFERENCES pA ON UPDATE SET NULL);
INSERT INTO pA VALUES(X'ABCD');
INSERT INTO pA VALUES(X'1234');
INSERT INTO cA VALUES(X'ABCD');
INSERT INTO cB VALUES(X'1234');
}
} {}
do_test e_fkey-44.2 {
execsql {
DELETE FROM pA WHERE rowid = 1;
SELECT quote(x) FROM pA;
}
} {X'1234'}
do_test e_fkey-44.3 {
execsql {
SELECT quote(c) FROM cA;
}
} {NULL}
do_test e_fkey-44.4 {
execsql {
UPDATE pA SET x = X'8765' WHERE rowid = 2;
SELECT quote(x) FROM pA;
}
} {X'8765'}
do_test e_fkey-44.5 {
execsql { SELECT quote(c) FROM cB }
} {NULL}
#-------------------------------------------------------------------------
# Test SET DEFAULT actions.
#
# EVIDENCE-OF: R-43054-54832 The "SET DEFAULT" actions are similar to
# "SET NULL", except that each of the child key columns is set to
# contain the columns default value instead of NULL.
#
drop_all_tables
do_test e_fkey-45.1 {
execsql {
CREATE TABLE pA(x PRIMARY KEY);
CREATE TABLE cA(c DEFAULT X'0000' REFERENCES pA ON DELETE SET DEFAULT);
CREATE TABLE cB(c DEFAULT X'9999' REFERENCES pA ON UPDATE SET DEFAULT);
INSERT INTO pA(rowid, x) VALUES(1, X'0000');
INSERT INTO pA(rowid, x) VALUES(2, X'9999');
INSERT INTO pA(rowid, x) VALUES(3, X'ABCD');
INSERT INTO pA(rowid, x) VALUES(4, X'1234');
INSERT INTO cA VALUES(X'ABCD');
INSERT INTO cB VALUES(X'1234');
}
} {}
do_test e_fkey-45.2 {
execsql {
DELETE FROM pA WHERE rowid = 3;
SELECT quote(x) FROM pA;
}
} {X'0000' X'9999' X'1234'}
do_test e_fkey-45.3 {
execsql { SELECT quote(c) FROM cA }
} {X'0000'}
do_test e_fkey-45.4 {
execsql {
UPDATE pA SET x = X'8765' WHERE rowid = 4;
SELECT quote(x) FROM pA;
}
} {X'0000' X'9999' X'8765'}
do_test e_fkey-45.5 {
execsql { SELECT quote(c) FROM cB }
} {X'9999'}
#-------------------------------------------------------------------------
# Test ON DELETE CASCADE actions.
#
# EVIDENCE-OF: R-61376-57267 A "CASCADE" action propagates the delete or
# update operation on the parent key to each dependent child key.
#
# EVIDENCE-OF: R-61809-62207 For an "ON DELETE CASCADE" action, this
# means that each row in the child table that was associated with the
# deleted parent row is also deleted.
#
drop_all_tables
do_test e_fkey-46.1 {
execsql {
CREATE TABLE p1(a, b UNIQUE);
CREATE TABLE c1(c REFERENCES p1(b) ON DELETE CASCADE, d);
INSERT INTO p1 VALUES(NULL, NULL);
INSERT INTO p1 VALUES(4, 4);
INSERT INTO p1 VALUES(5, 5);
INSERT INTO c1 VALUES(NULL, NULL);
INSERT INTO c1 VALUES(4, 4);
INSERT INTO c1 VALUES(5, 5);
SELECT count(*) FROM c1;
}
} {3}
do_test e_fkey-46.2 {
execsql {
DELETE FROM p1 WHERE a = 4;
SELECT d, c FROM c1;
}
} {{} {} 5 5}
do_test e_fkey-46.3 {
execsql {
DELETE FROM p1;
SELECT d, c FROM c1;
}
} {{} {}}
do_test e_fkey-46.4 {
execsql { SELECT * FROM p1 }
} {}
#-------------------------------------------------------------------------
# Test ON UPDATE CASCADE actions.
#
# EVIDENCE-OF: R-13877-64542 For an "ON UPDATE CASCADE" action, it means
# that the values stored in each dependent child key are modified to
# match the new parent key values.
#
# EVIDENCE-OF: R-61376-57267 A "CASCADE" action propagates the delete or
# update operation on the parent key to each dependent child key.
#
drop_all_tables
do_test e_fkey-47.1 {
execsql {
CREATE TABLE p1(a, b UNIQUE);
CREATE TABLE c1(c REFERENCES p1(b) ON UPDATE CASCADE, d);
INSERT INTO p1 VALUES(NULL, NULL);
INSERT INTO p1 VALUES(4, 4);
INSERT INTO p1 VALUES(5, 5);
INSERT INTO c1 VALUES(NULL, NULL);
INSERT INTO c1 VALUES(4, 4);
INSERT INTO c1 VALUES(5, 5);
SELECT count(*) FROM c1;
}
} {3}
do_test e_fkey-47.2 {
execsql {
UPDATE p1 SET b = 10 WHERE b = 5;
SELECT d, c FROM c1;
}
} {{} {} 4 4 5 10}
do_test e_fkey-47.3 {
execsql {
UPDATE p1 SET b = 11 WHERE b = 4;
SELECT d, c FROM c1;
}
} {{} {} 4 11 5 10}
do_test e_fkey-47.4 {
execsql {
UPDATE p1 SET b = 6 WHERE b IS NULL;
SELECT d, c FROM c1;
}
} {{} {} 4 11 5 10}
do_test e_fkey-46.5 {
execsql { SELECT * FROM p1 }
} {{} 6 4 11 5 10}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-65058-57158
#
# Test an example from the "ON DELETE and ON UPDATE Actions" section
# of foreignkeys.html.
#
drop_all_tables
do_test e_fkey-48.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER REFERENCES artist(artistid) ON UPDATE CASCADE
);
INSERT INTO artist VALUES(1, 'Dean Martin');
INSERT INTO artist VALUES(2, 'Frank Sinatra');
INSERT INTO track VALUES(11, 'That''s Amore', 1);
INSERT INTO track VALUES(12, 'Christmas Blues', 1);
INSERT INTO track VALUES(13, 'My Way', 2);
}
} {}
do_test e_fkey-48.2 {
execsql {
UPDATE artist SET artistid = 100 WHERE artistname = 'Dean Martin';
}
} {}
do_test e_fkey-48.3 {
execsql { SELECT * FROM artist }
} {2 {Frank Sinatra} 100 {Dean Martin}}
do_test e_fkey-48.4 {
execsql { SELECT * FROM track }
} {11 {That's Amore} 100 12 {Christmas Blues} 100 13 {My Way} 2}
#-------------------------------------------------------------------------
# Verify that adding an FK action does not absolve the user of the
# requirement not to violate the foreign key constraint.
#
# EVIDENCE-OF: R-53968-51642 Configuring an ON UPDATE or ON DELETE
# action does not mean that the foreign key constraint does not need to
# be satisfied.
#
drop_all_tables
do_test e_fkey-49.1 {
execsql {
CREATE TABLE parent(a COLLATE nocase, b, c, PRIMARY KEY(c, a));
CREATE TABLE child(d DEFAULT 'a', e, f DEFAULT 'c',
FOREIGN KEY(f, d) REFERENCES parent ON UPDATE SET DEFAULT
);
INSERT INTO parent VALUES('A', 'b', 'c');
INSERT INTO parent VALUES('ONE', 'two', 'three');
INSERT INTO child VALUES('one', 'two', 'three');
}
} {}
do_test e_fkey-49.2 {
execsql {
BEGIN;
UPDATE parent SET a = '' WHERE a = 'oNe';
SELECT * FROM child;
}
} {a two c}
do_test e_fkey-49.3 {
execsql {
ROLLBACK;
DELETE FROM parent WHERE a = 'A';
SELECT * FROM parent;
}
} {ONE two three}
do_test e_fkey-49.4 {
catchsql { UPDATE parent SET a = '' WHERE a = 'oNe' }
} {1 {foreign key constraint failed}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-11856-19836
#
# Test an example from the "ON DELETE and ON UPDATE Actions" section
# of foreignkeys.html. This example shows that adding an "ON DELETE DEFAULT"
# clause does not abrogate the need to satisfy the foreign key constraint
# (R-28220-46694).
#
# EVIDENCE-OF: R-28220-46694 For example, if an "ON DELETE SET DEFAULT"
# action is configured, but there is no row in the parent table that
# corresponds to the default values of the child key columns, deleting a
# parent key while dependent child keys exist still causes a foreign key
# violation.
#
drop_all_tables
do_test e_fkey-50.1 {
execsql {
CREATE TABLE artist(
artistid INTEGER PRIMARY KEY,
artistname TEXT
);
CREATE TABLE track(
trackid INTEGER,
trackname TEXT,
trackartist INTEGER DEFAULT 0 REFERENCES artist(artistid) ON DELETE SET DEFAULT
);
INSERT INTO artist VALUES(3, 'Sammy Davis Jr.');
INSERT INTO track VALUES(14, 'Mr. Bojangles', 3);
}
} {}
do_test e_fkey-50.2 {
catchsql { DELETE FROM artist WHERE artistname = 'Sammy Davis Jr.' }
} {1 {foreign key constraint failed}}
do_test e_fkey-50.3 {
execsql {
INSERT INTO artist VALUES(0, 'Unknown Artist');
DELETE FROM artist WHERE artistname = 'Sammy Davis Jr.';
}
} {}
do_test e_fkey-50.4 {
execsql { SELECT * FROM artist }
} {0 {Unknown Artist}}
do_test e_fkey-50.5 {
execsql { SELECT * FROM track }
} {14 {Mr. Bojangles} 0}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-09564-22170
#
# Check that the order of steps in an UPDATE or DELETE on a parent
# table is as follows:
#
# 1. Execute applicable BEFORE trigger programs,
# 2. Check local (non foreign key) constraints,
# 3. Update or delete the row in the parent table,
# 4. Perform any required foreign key actions,
# 5. Execute applicable AFTER trigger programs.
#
drop_all_tables
do_test e_fkey-51.1 {
proc maxparent {args} { db one {SELECT max(x) FROM parent} }
db func maxparent maxparent
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TRIGGER bu BEFORE UPDATE ON parent BEGIN
INSERT INTO parent VALUES(new.x-old.x);
END;
CREATE TABLE child(
a DEFAULT (maxparent()) REFERENCES parent ON UPDATE SET DEFAULT
);
CREATE TRIGGER au AFTER UPDATE ON parent BEGIN
INSERT INTO parent VALUES(new.x+old.x);
END;
INSERT INTO parent VALUES(1);
INSERT INTO child VALUES(1);
}
} {}
do_test e_fkey-51.2 {
execsql {
UPDATE parent SET x = 22;
SELECT * FROM parent UNION ALL SELECT 'xxx' UNION ALL SELECT a FROM child;
}
} {22 21 23 xxx 22}
do_test e_fkey-51.3 {
execsql {
DELETE FROM child;
DELETE FROM parent;
INSERT INTO parent VALUES(-1);
INSERT INTO child VALUES(-1);
UPDATE parent SET x = 22;
SELECT * FROM parent UNION ALL SELECT 'xxx' UNION ALL SELECT a FROM child;
}
} {22 23 21 xxx 23}
#-------------------------------------------------------------------------
# Verify that ON UPDATE actions only actually take place if the parent key
# is set to a new value that is distinct from the old value. The default
# collation sequence and affinity are used to determine if the new value
# is 'distinct' from the old or not.
#
# EVIDENCE-OF: R-27383-10246 An ON UPDATE action is only taken if the
# values of the parent key are modified so that the new parent key
# values are not equal to the old.
#
drop_all_tables
do_test e_fkey-52.1 {
execsql {
CREATE TABLE zeus(a INTEGER COLLATE NOCASE, b, PRIMARY KEY(a, b));
CREATE TABLE apollo(c, d,
FOREIGN KEY(c, d) REFERENCES zeus ON UPDATE CASCADE
);
INSERT INTO zeus VALUES('abc', 'xyz');
INSERT INTO apollo VALUES('ABC', 'xyz');
}
execsql {
UPDATE zeus SET a = 'aBc';
SELECT * FROM apollo;
}
} {ABC xyz}
do_test e_fkey-52.2 {
execsql {
UPDATE zeus SET a = 1, b = 1;
SELECT * FROM apollo;
}
} {1 1}
do_test e_fkey-52.3 {
execsql {
UPDATE zeus SET a = 1, b = 1;
SELECT typeof(c), c, typeof(d), d FROM apollo;
}
} {integer 1 integer 1}
do_test e_fkey-52.4 {
execsql {
UPDATE zeus SET a = '1';
SELECT typeof(c), c, typeof(d), d FROM apollo;
}
} {integer 1 integer 1}
do_test e_fkey-52.5 {
execsql {
UPDATE zeus SET b = '1';
SELECT typeof(c), c, typeof(d), d FROM apollo;
}
} {integer 1 text 1}
do_test e_fkey-52.6 {
execsql {
UPDATE zeus SET b = NULL;
SELECT typeof(c), c, typeof(d), d FROM apollo;
}
} {integer 1 null {}}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-35129-58141
#
# Test an example from the "ON DELETE and ON UPDATE Actions" section
# of foreignkeys.html. This example demonstrates that ON UPDATE actions
# only take place if at least one parent key column is set to a value
# that is distinct from its previous value.
#
drop_all_tables
do_test e_fkey-53.1 {
execsql {
CREATE TABLE parent(x PRIMARY KEY);
CREATE TABLE child(y REFERENCES parent ON UPDATE SET NULL);
INSERT INTO parent VALUES('key');
INSERT INTO child VALUES('key');
}
} {}
do_test e_fkey-53.2 {
execsql {
UPDATE parent SET x = 'key';
SELECT IFNULL(y, 'null') FROM child;
}
} {key}
do_test e_fkey-53.3 {
execsql {
UPDATE parent SET x = 'key2';
SELECT IFNULL(y, 'null') FROM child;
}
} {null}
###########################################################################
### SECTION 5: CREATE, ALTER and DROP TABLE commands
###########################################################################
#-------------------------------------------------------------------------
# Test that parent keys are not checked when tables are created.
#
# EVIDENCE-OF: R-36018-21755 The parent key definitions of foreign key
# constraints are not checked when a table is created.
#
# EVIDENCE-OF: R-25384-39337 There is nothing stopping the user from
# creating a foreign key definition that refers to a parent table that
# does not exist, or to parent key columns that do not exist or are not
# collectively bound by a PRIMARY KEY or UNIQUE constraint.
#
# Child keys are checked to ensure all component columns exist. If parent
# key columns are explicitly specified, SQLite checks to make sure there
# are the same number of columns in the child and parent keys. (TODO: This
# is tested but does not correspond to any testable statement.)
#
# Also test that the above statements are true regardless of whether or not
# foreign keys are enabled: "A CREATE TABLE command operates the same whether
# or not foreign key constraints are enabled."
#
# EVIDENCE-OF: R-08908-23439 A CREATE TABLE command operates the same
# whether or not foreign key constraints are enabled.
#
foreach {tn zCreateTbl lRes} {
1 "CREATE TABLE t1(a, b REFERENCES t1)" {0 {}}
2 "CREATE TABLE t1(a, b REFERENCES t2)" {0 {}}
3 "CREATE TABLE t1(a, b, FOREIGN KEY(a,b) REFERENCES t1)" {0 {}}
4 "CREATE TABLE t1(a, b, FOREIGN KEY(a,b) REFERENCES t2)" {0 {}}
5 "CREATE TABLE t1(a, b, FOREIGN KEY(a,b) REFERENCES t2)" {0 {}}
6 "CREATE TABLE t1(a, b, FOREIGN KEY(a,b) REFERENCES t2(n,d))" {0 {}}
7 "CREATE TABLE t1(a, b, FOREIGN KEY(a,b) REFERENCES t1(a,b))" {0 {}}
A "CREATE TABLE t1(a, b, FOREIGN KEY(c,b) REFERENCES t2)"
{1 {unknown column "c" in foreign key definition}}
B "CREATE TABLE t1(a, b, FOREIGN KEY(c,b) REFERENCES t2(d))"
{1 {number of columns in foreign key does not match the number of columns in the referenced table}}
} {
do_test e_fkey-54.$tn.off {
drop_all_tables
execsql {PRAGMA foreign_keys = OFF}
catchsql $zCreateTbl
} $lRes
do_test e_fkey-54.$tn.on {
drop_all_tables
execsql {PRAGMA foreign_keys = ON}
catchsql $zCreateTbl
} $lRes
}
#-------------------------------------------------------------------------
# EVIDENCE-OF: R-47952-62498 It is not possible to use the "ALTER TABLE
# ... ADD COLUMN" syntax to add a column that includes a REFERENCES
# clause, unless the default value of the new column is NULL. Attempting
# to do so returns an error.
#
proc test_efkey_6 {tn zAlter isError} {
drop_all_tables
do_test e_fkey-56.$tn.1 "
execsql { CREATE TABLE tbl(a, b) }
[list catchsql $zAlter]
" [lindex {{0 {}} {1 {Cannot add a REFERENCES column with non-NULL default value}}} $isError]
}
test_efkey_6 1 "ALTER TABLE tbl ADD COLUMN c REFERENCES xx" 0
test_efkey_6 2 "ALTER TABLE tbl ADD COLUMN c DEFAULT NULL REFERENCES xx" 0
test_efkey_6 3 "ALTER TABLE tbl ADD COLUMN c DEFAULT 0 REFERENCES xx" 1
#-------------------------------------------------------------------------
# Test that ALTER TABLE adjusts REFERENCES clauses when the parent table
# is RENAMED.
#
# EVIDENCE-OF: R-47080-02069 If an "ALTER TABLE ... RENAME TO" command
# is used to rename a table that is the parent table of one or more
# foreign key constraints, the definitions of the foreign key
# constraints are modified to refer to the parent table by its new name
#
# Test that these adjustments are visible in the sqlite_master table.
#
# EVIDENCE-OF: R-63827-54774 The text of the child CREATE TABLE
# statement or statements stored in the sqlite_master table are modified
# to reflect the new parent table name.
#
do_test e_fkey-56.1 {
drop_all_tables
execsql {
CREATE TABLE 'p 1 "parent one"'(a REFERENCES 'p 1 "parent one"', b, PRIMARY KEY(b));
CREATE TABLE c1(c, d REFERENCES 'p 1 "parent one"' ON UPDATE CASCADE);
CREATE TABLE c2(e, f, FOREIGN KEY(f) REFERENCES 'p 1 "parent one"' ON UPDATE CASCADE);
CREATE TABLE c3(e, 'f col 2', FOREIGN KEY('f col 2') REFERENCES 'p 1 "parent one"' ON UPDATE CASCADE);
INSERT INTO 'p 1 "parent one"' VALUES(1, 1);
INSERT INTO c1 VALUES(1, 1);
INSERT INTO c2 VALUES(1, 1);
INSERT INTO c3 VALUES(1, 1);
-- CREATE TABLE q(a, b, PRIMARY KEY(b));
}
} {}
do_test e_fkey-56.2 {
execsql { ALTER TABLE 'p 1 "parent one"' RENAME TO p }
} {}
do_test e_fkey-56.3 {
execsql {
UPDATE p SET a = 'xxx', b = 'xxx';
SELECT * FROM p;
SELECT * FROM c1;
SELECT * FROM c2;
SELECT * FROM c3;
}
} {xxx xxx 1 xxx 1 xxx 1 xxx}
do_test e_fkey-56.4 {
execsql { SELECT sql FROM sqlite_master WHERE type = 'table'}
} [list \
{CREATE TABLE "p"(a REFERENCES "p", b, PRIMARY KEY(b))} \
{CREATE TABLE c1(c, d REFERENCES "p" ON UPDATE CASCADE)} \
{CREATE TABLE c2(e, f, FOREIGN KEY(f) REFERENCES "p" ON UPDATE CASCADE)} \
{CREATE TABLE c3(e, 'f col 2', FOREIGN KEY('f col 2') REFERENCES "p" ON UPDATE CASCADE)} \
]
#-------------------------------------------------------------------------
# Check that a DROP TABLE does an implicit DELETE FROM. Which does not
# cause any triggers to fire, but does fire foreign key actions.
#
# EVIDENCE-OF: R-14208-23986 If foreign key constraints are enabled when
# it is prepared, the DROP TABLE command performs an implicit DELETE to
# remove all rows from the table before dropping it.
#
# EVIDENCE-OF: R-11078-03945 The implicit DELETE does not cause any SQL
# triggers to fire, but may invoke foreign key actions or constraint
# violations.
#
do_test e_fkey-57.1 {
drop_all_tables
execsql {
CREATE TABLE p(a, b, PRIMARY KEY(a, b));
CREATE TABLE c1(c, d, FOREIGN KEY(c, d) REFERENCES p ON DELETE SET NULL);
CREATE TABLE c2(c, d, FOREIGN KEY(c, d) REFERENCES p ON DELETE SET DEFAULT);
CREATE TABLE c3(c, d, FOREIGN KEY(c, d) REFERENCES p ON DELETE CASCADE);
CREATE TABLE c4(c, d, FOREIGN KEY(c, d) REFERENCES p ON DELETE RESTRICT);
CREATE TABLE c5(c, d, FOREIGN KEY(c, d) REFERENCES p ON DELETE NO ACTION);
CREATE TABLE c6(c, d,
FOREIGN KEY(c, d) REFERENCES p ON DELETE RESTRICT
DEFERRABLE INITIALLY DEFERRED
);
CREATE TABLE c7(c, d,
FOREIGN KEY(c, d) REFERENCES p ON DELETE NO ACTION
DEFERRABLE INITIALLY DEFERRED
);
CREATE TABLE log(msg);
CREATE TRIGGER tt AFTER DELETE ON p BEGIN
INSERT INTO log VALUES('delete ' || old.rowid);
END;
}
} {}
do_test e_fkey-57.2 {
execsql {
INSERT INTO p VALUES('a', 'b');
INSERT INTO c1 VALUES('a', 'b');
INSERT INTO c2 VALUES('a', 'b');
INSERT INTO c3 VALUES('a', 'b');
BEGIN;
DROP TABLE p;
SELECT * FROM c1;
}
} {{} {}}
do_test e_fkey-57.3 {
execsql { SELECT * FROM c2 }
} {{} {}}
do_test e_fkey-57.4 {
execsql { SELECT * FROM c3 }
} {}
do_test e_fkey-57.5 {
execsql { SELECT * FROM log }
} {}
do_test e_fkey-57.6 {
execsql ROLLBACK
} {}
do_test e_fkey-57.7 {
execsql {
BEGIN;
DELETE FROM p;
SELECT * FROM log;
ROLLBACK;
}
} {{delete 1}}
#-------------------------------------------------------------------------
# If an IMMEDIATE foreign key fails as a result of a DROP TABLE, the
# DROP TABLE command fails.
#
# EVIDENCE-OF: R-32768-47925 If an immediate foreign key constraint is
# violated, the DROP TABLE statement fails and the table is not dropped.
#
do_test e_fkey-58.1 {
execsql {
DELETE FROM c1;
DELETE FROM c2;
DELETE FROM c3;
}
execsql { INSERT INTO c5 VALUES('a', 'b') }
catchsql { DROP TABLE p }
} {1 {foreign key constraint failed}}
do_test e_fkey-58.2 {
execsql { SELECT * FROM p }
} {a b}
do_test e_fkey-58.3 {
catchsql {
BEGIN;
DROP TABLE p;
}
} {1 {foreign key constraint failed}}
do_test e_fkey-58.4 {
execsql {
SELECT * FROM p;
SELECT * FROM c5;
ROLLBACK;
}
} {a b a b}
#-------------------------------------------------------------------------
# If a DEFERRED foreign key fails as a result of a DROP TABLE, attempting
# to commit the transaction fails unless the violation is fixed.
#
# EVIDENCE-OF: R-05903-08460 If a deferred foreign key constraint is
# violated, then an error is reported when the user attempts to commit
# the transaction if the foreign key constraint violations still exist
# at that point.
#
do_test e_fkey-59.1 {
execsql {
DELETE FROM c1 ; DELETE FROM c2 ; DELETE FROM c3 ;
DELETE FROM c4 ; DELETE FROM c5 ; DELETE FROM c6 ;
DELETE FROM c7
}
} {}
do_test e_fkey-59.2 {
execsql { INSERT INTO c7 VALUES('a', 'b') }
execsql {
BEGIN;
DROP TABLE p;
}
} {}
do_test e_fkey-59.3 {
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-59.4 {
execsql { CREATE TABLE p(a, b, PRIMARY KEY(a, b)) }
catchsql COMMIT
} {1 {foreign key constraint failed}}
do_test e_fkey-59.5 {
execsql { INSERT INTO p VALUES('a', 'b') }
execsql COMMIT
} {}
#-------------------------------------------------------------------------
# Any "foreign key mismatch" errors encountered while running an implicit
# "DELETE FROM tbl" are ignored.
#
# EVIDENCE-OF: R-57242-37005 Any "foreign key mismatch" errors
# encountered as part of an implicit DELETE are ignored.
#
drop_all_tables
do_test e_fkey-60.1 {
execsql {
PRAGMA foreign_keys = OFF;
CREATE TABLE p(a PRIMARY KEY, b REFERENCES nosuchtable);
CREATE TABLE c1(c, d, FOREIGN KEY(c, d) REFERENCES a);
CREATE TABLE c2(c REFERENCES p(b), d);
CREATE TABLE c3(c REFERENCES p ON DELETE SET NULL, d);
INSERT INTO p VALUES(1, 2);
INSERT INTO c1 VALUES(1, 2);
INSERT INTO c2 VALUES(1, 2);
INSERT INTO c3 VALUES(1, 2);
}
} {}
do_test e_fkey-60.2 {
execsql { PRAGMA foreign_keys = ON }
catchsql { DELETE FROM p }
} {1 {no such table: main.nosuchtable}}
do_test e_fkey-60.3 {
execsql {
BEGIN;
DROP TABLE p;
SELECT * FROM c3;
ROLLBACK;
}
} {{} 2}
do_test e_fkey-60.4 {
execsql { CREATE TABLE nosuchtable(x PRIMARY KEY) }
catchsql { DELETE FROM p }
} {1 {foreign key mismatch}}
do_test e_fkey-60.5 {
execsql { DROP TABLE c1 }
catchsql { DELETE FROM p }
} {1 {foreign key mismatch}}
do_test e_fkey-60.6 {
execsql { DROP TABLE c2 }
execsql { DELETE FROM p }
} {}
#-------------------------------------------------------------------------
# Test that the special behaviours of ALTER and DROP TABLE are only
# activated when foreign keys are enabled. Special behaviours are:
#
# 1. ADD COLUMN not allowing a REFERENCES clause with a non-NULL
# default value.
# 2. Modifying foreign key definitions when a parent table is RENAMEd.
# 3. Running an implicit DELETE FROM command as part of DROP TABLE.
#
# EVIDENCE-OF: R-54142-41346 The properties of the DROP TABLE and ALTER
# TABLE commands described above only apply if foreign keys are enabled.
#
do_test e_fkey-61.1.1 {
drop_all_tables
execsql { CREATE TABLE t1(a, b) }
catchsql { ALTER TABLE t1 ADD COLUMN c DEFAULT 'xxx' REFERENCES t2 }
} {1 {Cannot add a REFERENCES column with non-NULL default value}}
do_test e_fkey-61.1.2 {
execsql { PRAGMA foreign_keys = OFF }
execsql { ALTER TABLE t1 ADD COLUMN c DEFAULT 'xxx' REFERENCES t2 }
execsql { SELECT sql FROM sqlite_master WHERE name = 't1' }
} {{CREATE TABLE t1(a, b, c DEFAULT 'xxx' REFERENCES t2)}}
do_test e_fkey-61.1.3 {
execsql { PRAGMA foreign_keys = ON }
} {}
do_test e_fkey-61.2.1 {
drop_all_tables
execsql {
CREATE TABLE p(a UNIQUE);
CREATE TABLE c(b REFERENCES p(a));
BEGIN;
ALTER TABLE p RENAME TO parent;
SELECT sql FROM sqlite_master WHERE name = 'c';
ROLLBACK;
}
} {{CREATE TABLE c(b REFERENCES "parent"(a))}}
do_test e_fkey-61.2.2 {
execsql {
PRAGMA foreign_keys = OFF;
ALTER TABLE p RENAME TO parent;
SELECT sql FROM sqlite_master WHERE name = 'c';
}
} {{CREATE TABLE c(b REFERENCES p(a))}}
do_test e_fkey-61.2.3 {
execsql { PRAGMA foreign_keys = ON }
} {}
do_test e_fkey-61.3.1 {
drop_all_tables
execsql {
CREATE TABLE p(a UNIQUE);
CREATE TABLE c(b REFERENCES p(a) ON DELETE SET NULL);
INSERT INTO p VALUES('x');
INSERT INTO c VALUES('x');
BEGIN;
DROP TABLE p;
SELECT * FROM c;
ROLLBACK;
}
} {{}}
do_test e_fkey-61.3.2 {
execsql {
PRAGMA foreign_keys = OFF;
DROP TABLE p;
SELECT * FROM c;
}
} {x}
do_test e_fkey-61.3.3 {
execsql { PRAGMA foreign_keys = ON }
} {}
###########################################################################
### SECTION 6: Limits and Unsupported Features
###########################################################################
#-------------------------------------------------------------------------
# Test that MATCH clauses are parsed, but SQLite treats every foreign key
# constraint as if it were "MATCH SIMPLE".
#
# EVIDENCE-OF: R-24728-13230 SQLite parses MATCH clauses (i.e. does not
# report a syntax error if you specify one), but does not enforce them.
#
# EVIDENCE-OF: R-24450-46174 All foreign key constraints in SQLite are
# handled as if MATCH SIMPLE were specified.
#
foreach zMatch [list SIMPLE PARTIAL FULL Simple parTIAL FuLL ] {
drop_all_tables
do_test e_fkey-62.$zMatch.1 {
execsql "
CREATE TABLE p(a, b, c, PRIMARY KEY(b, c));
CREATE TABLE c(d, e, f, FOREIGN KEY(e, f) REFERENCES p MATCH $zMatch);
"
} {}
do_test e_fkey-62.$zMatch.2 {
execsql { INSERT INTO p VALUES(1, 2, 3) }
# MATCH SIMPLE behaviour: Allow any child key that contains one or more
# NULL value to be inserted. Non-NULL values do not have to map to any
# parent key values, so long as at least one field of the child key is
# NULL.
execsql { INSERT INTO c VALUES('w', 2, 3) }
execsql { INSERT INTO c VALUES('x', 'x', NULL) }
execsql { INSERT INTO c VALUES('y', NULL, 'x') }
execsql { INSERT INTO c VALUES('z', NULL, NULL) }
# Check that the FK is enforced properly if there are no NULL values
# in the child key columns.
catchsql { INSERT INTO c VALUES('a', 2, 4) }
} {1 {foreign key constraint failed}}
}
#-------------------------------------------------------------------------
# Test that SQLite does not support the SET CONSTRAINT statement. And
# that it is possible to create both immediate and deferred constraints.
#
# EVIDENCE-OF: R-21599-16038 In SQLite, a foreign key constraint is
# permanently marked as deferred or immediate when it is created.
#
drop_all_tables
do_test e_fkey-62.1 {
catchsql { SET CONSTRAINTS ALL IMMEDIATE }
} {1 {near "SET": syntax error}}
do_test e_fkey-62.2 {
catchsql { SET CONSTRAINTS ALL DEFERRED }
} {1 {near "SET": syntax error}}
do_test e_fkey-62.3 {
execsql {
CREATE TABLE p(a, b, PRIMARY KEY(a, b));
CREATE TABLE cd(c, d,
FOREIGN KEY(c, d) REFERENCES p DEFERRABLE INITIALLY DEFERRED);
CREATE TABLE ci(c, d,
FOREIGN KEY(c, d) REFERENCES p DEFERRABLE INITIALLY IMMEDIATE);
BEGIN;
}
} {}
do_test e_fkey-62.4 {
catchsql { INSERT INTO ci VALUES('x', 'y') }
} {1 {foreign key constraint failed}}
do_test e_fkey-62.5 {
catchsql { INSERT INTO cd VALUES('x', 'y') }
} {0 {}}
do_test e_fkey-62.6 {
catchsql { COMMIT }
} {1 {foreign key constraint failed}}
do_test e_fkey-62.7 {
execsql {
DELETE FROM cd;
COMMIT;
}
} {}
#-------------------------------------------------------------------------
# Test that the maximum recursion depth of foreign key action programs is
# governed by the SQLITE_MAX_TRIGGER_DEPTH and SQLITE_LIMIT_TRIGGER_DEPTH
# settings.
#
# EVIDENCE-OF: R-42264-30503 The SQLITE_MAX_TRIGGER_DEPTH and
# SQLITE_LIMIT_TRIGGER_DEPTH settings determine the maximum allowable
# depth of trigger program recursion. For the purposes of these limits,
# foreign key actions are considered trigger programs.
#
proc test_on_delete_recursion {limit} {
drop_all_tables
execsql {
BEGIN;
CREATE TABLE t0(a PRIMARY KEY, b);
INSERT INTO t0 VALUES('x0', NULL);
}
for {set i 1} {$i <= $limit} {incr i} {
execsql "
CREATE TABLE t$i (
a PRIMARY KEY, b REFERENCES t[expr $i-1] ON DELETE CASCADE
);
INSERT INTO t$i VALUES('x$i', 'x[expr $i-1]');
"
}
execsql COMMIT
catchsql "
DELETE FROM t0;
SELECT count(*) FROM t$limit;
"
}
proc test_on_update_recursion {limit} {
drop_all_tables
execsql {
BEGIN;
CREATE TABLE t0(a PRIMARY KEY);
INSERT INTO t0 VALUES('xxx');
}
for {set i 1} {$i <= $limit} {incr i} {
set j [expr $i-1]
execsql "
CREATE TABLE t$i (a PRIMARY KEY REFERENCES t$j ON UPDATE CASCADE);
INSERT INTO t$i VALUES('xxx');
"
}
execsql COMMIT
catchsql "
UPDATE t0 SET a = 'yyy';
SELECT NOT (a='yyy') FROM t$limit;
"
}
do_test e_fkey-63.1.1 {
test_on_delete_recursion $SQLITE_MAX_TRIGGER_DEPTH
} {0 0}
do_test e_fkey-63.1.2 {
test_on_delete_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
} {1 {too many levels of trigger recursion}}
do_test e_fkey-63.1.3 {
sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
test_on_delete_recursion 5
} {0 0}
do_test e_fkey-63.1.4 {
test_on_delete_recursion 6
} {1 {too many levels of trigger recursion}}
do_test e_fkey-63.1.5 {
sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
} {5}
do_test e_fkey-63.2.1 {
test_on_update_recursion $SQLITE_MAX_TRIGGER_DEPTH
} {0 0}
do_test e_fkey-63.2.2 {
test_on_update_recursion [expr $SQLITE_MAX_TRIGGER_DEPTH+1]
} {1 {too many levels of trigger recursion}}
do_test e_fkey-63.2.3 {
sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 5
test_on_update_recursion 5
} {0 0}
do_test e_fkey-63.2.4 {
test_on_update_recursion 6
} {1 {too many levels of trigger recursion}}
do_test e_fkey-63.2.5 {
sqlite3_limit db SQLITE_LIMIT_TRIGGER_DEPTH 1000000
} {5}
#-------------------------------------------------------------------------
# The setting of the recursive_triggers pragma does not affect foreign
# key actions.
#
# EVIDENCE-OF: R-51769-32730 The PRAGMA recursive_triggers setting does
# not not affect the operation of foreign key actions.
#
foreach recursive_triggers_setting [list 0 1 ON OFF] {
drop_all_tables
execsql "PRAGMA recursive_triggers = $recursive_triggers_setting"
do_test e_fkey-64.$recursive_triggers_setting.1 {
execsql {
CREATE TABLE t1(a PRIMARY KEY, b REFERENCES t1 ON DELETE CASCADE);
INSERT INTO t1 VALUES(1, NULL);
INSERT INTO t1 VALUES(2, 1);
INSERT INTO t1 VALUES(3, 2);
INSERT INTO t1 VALUES(4, 3);
INSERT INTO t1 VALUES(5, 4);
SELECT count(*) FROM t1;
}
} {5}
do_test e_fkey-64.$recursive_triggers_setting.2 {
execsql { SELECT count(*) FROM t1 WHERE a = 1 }
} {1}
do_test e_fkey-64.$recursive_triggers_setting.3 {
execsql {
DELETE FROM t1 WHERE a = 1;
SELECT count(*) FROM t1;
}
} {0}
}
finish_test