-- Tests for WITHOUT OVERLAPS.
--
-- We leave behind several tables to test pg_dump etc:
-- temporal_rng, temporal_rng2,
-- temporal_fk_rng2rng.
SET datestyle TO ISO, YMD;
--
-- test input parser
--
-- PK with no columns just WITHOUT OVERLAPS:
CREATE TABLE temporal_rng (
	valid_at daterange,
	CONSTRAINT temporal_rng_pk PRIMARY KEY (valid_at WITHOUT OVERLAPS)
);
ERROR:  constraint using WITHOUT OVERLAPS needs at least two columns
-- PK with a range column/PERIOD that isn't there:
CREATE TABLE temporal_rng (
	id INTEGER,
	CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ERROR:  column "valid_at" named in key does not exist
LINE 3:  CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOU...
         ^
-- PK with a non-range column:
CREATE TABLE temporal_rng (
	id int4range,
	valid_at TEXT,
	CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ERROR:  data type text has no default operator class for access method "gist"
HINT:  You must specify an operator class for the index or define a default operator class for the data type.
-- PK with one column plus a range:
CREATE TABLE temporal_rng (
	-- Since we can't depend on having btree_gist here,
	-- use an int4range instead of an int.
	-- (The rangetypes regression test uses the same trick.)
	id int4range,
	valid_at daterange,
	CONSTRAINT temporal_rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
\d temporal_rng
              Table "public.temporal_rng"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id       | int4range |           | not null | 
 valid_at | daterange |           | not null | 
Indexes:
    "temporal_rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng_pk';
            pg_get_constraintdef             
---------------------------------------------
 PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_rng_pk';
                                pg_get_indexdef                                
-------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_rng_pk ON temporal_rng USING gist (id, valid_at)
(1 row)

-- PK with two columns plus a range:
-- We don't drop this table because tests below also need multiple scalar columns.
CREATE TABLE temporal_rng2 (
	id1 int4range,
	id2 int4range,
	valid_at daterange,
	CONSTRAINT temporal_rng2_pk PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)
);
\d temporal_rng2
             Table "public.temporal_rng2"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id1      | int4range |           | not null | 
 id2      | int4range |           | not null | 
 valid_at | daterange |           | not null | 
Indexes:
    "temporal_rng2_pk" PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng2_pk';
               pg_get_constraintdef                
---------------------------------------------------
 PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_rng2_pk';
                                    pg_get_indexdef                                    
---------------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_rng2_pk ON temporal_rng2 USING gist (id1, id2, valid_at)
(1 row)

-- PK with a custom range type:
CREATE TYPE textrange2 AS range (subtype=text, collation="C");
CREATE TABLE temporal_rng3 (
	id int4range,
	valid_at textrange2,
	CONSTRAINT temporal_rng3_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_rng3 DROP CONSTRAINT temporal_rng3_pk;
DROP TABLE temporal_rng3;
DROP TYPE textrange2;
-- PK with one column plus a multirange:
CREATE TABLE temporal_mltrng (
  id int4range,
  valid_at datemultirange,
  CONSTRAINT temporal_mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
\d temporal_mltrng
               Table "public.temporal_mltrng"
  Column  |      Type      | Collation | Nullable | Default 
----------+----------------+-----------+----------+---------
 id       | int4range      |           | not null | 
 valid_at | datemultirange |           | not null | 
Indexes:
    "temporal_mltrng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)

-- PK with two columns plus a multirange:
-- We don't drop this table because tests below also need multiple scalar columns.
CREATE TABLE temporal_mltrng2 (
	id1 int4range,
	id2 int4range,
	valid_at datemultirange,
	CONSTRAINT temporal_mltrng2_pk PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)
);
\d temporal_mltrng2
              Table "public.temporal_mltrng2"
  Column  |      Type      | Collation | Nullable | Default 
----------+----------------+-----------+----------+---------
 id1      | int4range      |           | not null | 
 id2      | int4range      |           | not null | 
 valid_at | datemultirange |           | not null | 
Indexes:
    "temporal_mltrng2_pk" PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_mltrng2_pk';
               pg_get_constraintdef                
---------------------------------------------------
 PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_mltrng2_pk';
                                       pg_get_indexdef                                       
---------------------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_mltrng2_pk ON temporal_mltrng2 USING gist (id1, id2, valid_at)
(1 row)

-- UNIQUE with no columns just WITHOUT OVERLAPS:
CREATE TABLE temporal_rng3 (
	valid_at daterange,
	CONSTRAINT temporal_rng3_uq UNIQUE (valid_at WITHOUT OVERLAPS)
);
ERROR:  constraint using WITHOUT OVERLAPS needs at least two columns
-- UNIQUE with a range column/PERIOD that isn't there:
CREATE TABLE temporal_rng3 (
	id INTEGER,
	CONSTRAINT temporal_rng3_uq UNIQUE (id, valid_at WITHOUT OVERLAPS)
);
ERROR:  column "valid_at" named in key does not exist
LINE 3:  CONSTRAINT temporal_rng3_uq UNIQUE (id, valid_at WITHOUT OV...
         ^
-- UNIQUE with a non-range column:
CREATE TABLE temporal_rng3 (
	id int4range,
	valid_at TEXT,
	CONSTRAINT temporal_rng3_uq UNIQUE (id, valid_at WITHOUT OVERLAPS)
);
ERROR:  data type text has no default operator class for access method "gist"
HINT:  You must specify an operator class for the index or define a default operator class for the data type.
-- UNIQUE with one column plus a range:
CREATE TABLE temporal_rng3 (
	id int4range,
	valid_at daterange,
	CONSTRAINT temporal_rng3_uq UNIQUE (id, valid_at WITHOUT OVERLAPS)
);
\d temporal_rng3
             Table "public.temporal_rng3"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id       | int4range |           |          | 
 valid_at | daterange |           |          | 
Indexes:
    "temporal_rng3_uq" UNIQUE (id, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng3_uq';
          pg_get_constraintdef          
----------------------------------------
 UNIQUE (id, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_rng3_uq';
                                 pg_get_indexdef                                 
---------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_rng3_uq ON temporal_rng3 USING gist (id, valid_at)
(1 row)

DROP TABLE temporal_rng3;
-- UNIQUE with two columns plus a range:
CREATE TABLE temporal_rng3 (
	id1 int4range,
	id2 int4range,
	valid_at daterange,
	CONSTRAINT temporal_rng3_uq UNIQUE (id1, id2, valid_at WITHOUT OVERLAPS)
);
\d temporal_rng3
             Table "public.temporal_rng3"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id1      | int4range |           |          | 
 id2      | int4range |           |          | 
 valid_at | daterange |           |          | 
Indexes:
    "temporal_rng3_uq" UNIQUE (id1, id2, valid_at WITHOUT OVERLAPS)

SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_rng3_uq';
             pg_get_constraintdef             
----------------------------------------------
 UNIQUE (id1, id2, valid_at WITHOUT OVERLAPS)
(1 row)

SELECT pg_get_indexdef(conindid, 0, true) FROM pg_constraint WHERE conname = 'temporal_rng3_uq';
                                    pg_get_indexdef                                    
---------------------------------------------------------------------------------------
 CREATE UNIQUE INDEX temporal_rng3_uq ON temporal_rng3 USING gist (id1, id2, valid_at)
(1 row)

DROP TABLE temporal_rng3;
-- UNIQUE with a custom range type:
CREATE TYPE textrange2 AS range (subtype=text, collation="C");
CREATE TABLE temporal_rng3 (
	id int4range,
	valid_at textrange2,
	CONSTRAINT temporal_rng3_uq UNIQUE (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_rng3 DROP CONSTRAINT temporal_rng3_uq;
DROP TABLE temporal_rng3;
DROP TYPE textrange2;
--
-- test ALTER TABLE ADD CONSTRAINT
--
DROP TABLE temporal_rng;
CREATE TABLE temporal_rng (
	id int4range,
	valid_at daterange
);
ALTER TABLE temporal_rng
	ADD CONSTRAINT temporal_rng_pk
	PRIMARY KEY (id, valid_at WITHOUT OVERLAPS);
-- PK with USING INDEX (not possible):
CREATE TABLE temporal3 (
	id int4range,
	valid_at daterange
);
CREATE INDEX idx_temporal3_uq ON temporal3 USING gist (id, valid_at);
ALTER TABLE temporal3
	ADD CONSTRAINT temporal3_pk
	PRIMARY KEY USING INDEX idx_temporal3_uq;
ERROR:  "idx_temporal3_uq" is not a unique index
LINE 2:  ADD CONSTRAINT temporal3_pk
             ^
DETAIL:  Cannot create a primary key or unique constraint using such an index.
DROP TABLE temporal3;
-- UNIQUE with USING INDEX (not possible):
CREATE TABLE temporal3 (
	id int4range,
	valid_at daterange
);
CREATE INDEX idx_temporal3_uq ON temporal3 USING gist (id, valid_at);
ALTER TABLE temporal3
	ADD CONSTRAINT temporal3_uq
	UNIQUE USING INDEX idx_temporal3_uq;
ERROR:  "idx_temporal3_uq" is not a unique index
LINE 2:  ADD CONSTRAINT temporal3_uq
             ^
DETAIL:  Cannot create a primary key or unique constraint using such an index.
DROP TABLE temporal3;
-- UNIQUE with USING [UNIQUE] INDEX (possible but not a temporal constraint):
CREATE TABLE temporal3 (
	id int4range,
	valid_at daterange
);
CREATE UNIQUE INDEX idx_temporal3_uq ON temporal3 (id, valid_at);
ALTER TABLE temporal3
	ADD CONSTRAINT temporal3_uq
	UNIQUE USING INDEX idx_temporal3_uq;
NOTICE:  ALTER TABLE / ADD CONSTRAINT USING INDEX will rename index "idx_temporal3_uq" to "temporal3_uq"
DROP TABLE temporal3;
-- Add range column and the PK at the same time
CREATE TABLE temporal3 (
	id int4range
);
ALTER TABLE temporal3
	ADD COLUMN valid_at daterange,
	ADD CONSTRAINT temporal3_pk
	PRIMARY KEY (id, valid_at WITHOUT OVERLAPS);
DROP TABLE temporal3;
-- Add range column and UNIQUE constraint at the same time
CREATE TABLE temporal3 (
	id int4range
);
ALTER TABLE temporal3
	ADD COLUMN valid_at daterange,
	ADD CONSTRAINT temporal3_uq
	UNIQUE (id, valid_at WITHOUT OVERLAPS);
DROP TABLE temporal3;
--
-- test PK inserts
--
-- okay:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[1,2)', daterange('2018-01-02', '2018-02-03'));
INSERT INTO temporal_rng (id, valid_at) VALUES ('[1,2)', daterange('2018-03-03', '2018-04-04'));
INSERT INTO temporal_rng (id, valid_at) VALUES ('[2,3)', daterange('2018-01-01', '2018-01-05'));
INSERT INTO temporal_rng (id, valid_at) VALUES ('[3,4)', daterange('2018-01-01', NULL));
-- should fail:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[1,2)', daterange('2018-01-01', '2018-01-05'));
ERROR:  conflicting key value violates exclusion constraint "temporal_rng_pk"
DETAIL:  Key (id, valid_at)=([1,2), [2018-01-01,2018-01-05)) conflicts with existing key (id, valid_at)=([1,2), [2018-01-02,2018-02-03)).
INSERT INTO temporal_rng (id, valid_at) VALUES (NULL, daterange('2018-01-01', '2018-01-05'));
ERROR:  null value in column "id" of relation "temporal_rng" violates not-null constraint
DETAIL:  Failing row contains (null, [2018-01-01,2018-01-05)).
INSERT INTO temporal_rng (id, valid_at) VALUES ('[3,4)', NULL);
ERROR:  null value in column "valid_at" of relation "temporal_rng" violates not-null constraint
DETAIL:  Failing row contains ([3,4), null).
-- okay:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[1,2)', datemultirange(daterange('2018-01-02', '2018-02-03')));
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[1,2)', datemultirange(daterange('2018-03-03', '2018-04-04')));
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[2,3)', datemultirange(daterange('2018-01-01', '2018-01-05')));
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[3,4)', datemultirange(daterange('2018-01-01', NULL)));
-- should fail:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[1,2)', datemultirange(daterange('2018-01-01', '2018-01-05')));
ERROR:  conflicting key value violates exclusion constraint "temporal_mltrng_pk"
DETAIL:  Key (id, valid_at)=([1,2), {[2018-01-01,2018-01-05)}) conflicts with existing key (id, valid_at)=([1,2), {[2018-01-02,2018-02-03)}).
INSERT INTO temporal_mltrng (id, valid_at) VALUES (NULL, datemultirange(daterange('2018-01-01', '2018-01-05')));
ERROR:  null value in column "id" of relation "temporal_mltrng" violates not-null constraint
DETAIL:  Failing row contains (null, {[2018-01-01,2018-01-05)}).
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[3,4)', NULL);
ERROR:  null value in column "valid_at" of relation "temporal_mltrng" violates not-null constraint
DETAIL:  Failing row contains ([3,4), null).
SELECT * FROM temporal_mltrng ORDER BY id, valid_at;
  id   |         valid_at          
-------+---------------------------
 [1,2) | {[2018-01-02,2018-02-03)}
 [1,2) | {[2018-03-03,2018-04-04)}
 [2,3) | {[2018-01-01,2018-01-05)}
 [3,4) | {[2018-01-01,)}
(4 rows)

--
-- test a range with both a PK and a UNIQUE constraint
--
CREATE TABLE temporal3 (
  id int4range,
  valid_at daterange,
  id2 int8range,
  name TEXT,
  CONSTRAINT temporal3_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
  CONSTRAINT temporal3_uniq UNIQUE (id2, valid_at WITHOUT OVERLAPS)
);
INSERT INTO temporal3 (id, valid_at, id2, name)
  VALUES
  ('[1,2)', daterange('2000-01-01', '2010-01-01'), '[7,8)', 'foo'),
  ('[2,3)', daterange('2000-01-01', '2010-01-01'), '[9,10)', 'bar')
;
DROP TABLE temporal3;
--
-- test changing the PK's dependencies
--
CREATE TABLE temporal3 (
	id int4range,
	valid_at daterange,
	CONSTRAINT temporal3_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal3 ALTER COLUMN valid_at DROP NOT NULL;
ERROR:  column "valid_at" is in a primary key
ALTER TABLE temporal3 ALTER COLUMN valid_at TYPE tstzrange USING tstzrange(lower(valid_at), upper(valid_at));
ALTER TABLE temporal3 RENAME COLUMN valid_at TO valid_thru;
ALTER TABLE temporal3 DROP COLUMN valid_thru;
DROP TABLE temporal3;
--
-- test PARTITION BY for ranges
--
-- temporal PRIMARY KEY:
CREATE TABLE temporal_partitioned (
	id int4range,
	valid_at daterange,
  name text,
	CONSTRAINT temporal_paritioned_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
) PARTITION BY LIST (id);
CREATE TABLE tp1 PARTITION OF temporal_partitioned FOR VALUES IN ('[1,2)', '[2,3)');
CREATE TABLE tp2 PARTITION OF temporal_partitioned FOR VALUES IN ('[3,4)', '[4,5)');
INSERT INTO temporal_partitioned (id, valid_at, name) VALUES
  ('[1,2)', daterange('2000-01-01', '2000-02-01'), 'one'),
  ('[1,2)', daterange('2000-02-01', '2000-03-01'), 'one'),
  ('[3,4)', daterange('2000-01-01', '2010-01-01'), 'three');
SELECT * FROM temporal_partitioned ORDER BY id, valid_at;
  id   |        valid_at         | name  
-------+-------------------------+-------
 [1,2) | [2000-01-01,2000-02-01) | one
 [1,2) | [2000-02-01,2000-03-01) | one
 [3,4) | [2000-01-01,2010-01-01) | three
(3 rows)

SELECT * FROM tp1 ORDER BY id, valid_at;
  id   |        valid_at         | name 
-------+-------------------------+------
 [1,2) | [2000-01-01,2000-02-01) | one
 [1,2) | [2000-02-01,2000-03-01) | one
(2 rows)

SELECT * FROM tp2 ORDER BY id, valid_at;
  id   |        valid_at         | name  
-------+-------------------------+-------
 [3,4) | [2000-01-01,2010-01-01) | three
(1 row)

DROP TABLE temporal_partitioned;
-- temporal UNIQUE:
CREATE TABLE temporal_partitioned (
	id int4range,
	valid_at daterange,
  name text,
	CONSTRAINT temporal_paritioned_uq UNIQUE (id, valid_at WITHOUT OVERLAPS)
) PARTITION BY LIST (id);
CREATE TABLE tp1 PARTITION OF temporal_partitioned FOR VALUES IN ('[1,2)', '[2,3)');
CREATE TABLE tp2 PARTITION OF temporal_partitioned FOR VALUES IN ('[3,4)', '[4,5)');
INSERT INTO temporal_partitioned (id, valid_at, name) VALUES
  ('[1,2)', daterange('2000-01-01', '2000-02-01'), 'one'),
  ('[1,2)', daterange('2000-02-01', '2000-03-01'), 'one'),
  ('[3,4)', daterange('2000-01-01', '2010-01-01'), 'three');
SELECT * FROM temporal_partitioned ORDER BY id, valid_at;
  id   |        valid_at         | name  
-------+-------------------------+-------
 [1,2) | [2000-01-01,2000-02-01) | one
 [1,2) | [2000-02-01,2000-03-01) | one
 [3,4) | [2000-01-01,2010-01-01) | three
(3 rows)

SELECT * FROM tp1 ORDER BY id, valid_at;
  id   |        valid_at         | name 
-------+-------------------------+------
 [1,2) | [2000-01-01,2000-02-01) | one
 [1,2) | [2000-02-01,2000-03-01) | one
(2 rows)

SELECT * FROM tp2 ORDER BY id, valid_at;
  id   |        valid_at         | name  
-------+-------------------------+-------
 [3,4) | [2000-01-01,2010-01-01) | three
(1 row)

DROP TABLE temporal_partitioned;
--
-- test FK dependencies
--
-- can't drop a range referenced by an FK, unless with CASCADE
CREATE TABLE temporal3 (
	id int4range,
	valid_at daterange,
	CONSTRAINT temporal3_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal3 (id, PERIOD valid_at)
);
ALTER TABLE temporal3 DROP COLUMN valid_at;
ERROR:  cannot drop column valid_at of table temporal3 because other objects depend on it
DETAIL:  constraint temporal_fk_rng2rng_fk on table temporal_fk_rng2rng depends on column valid_at of table temporal3
HINT:  Use DROP ... CASCADE to drop the dependent objects too.
ALTER TABLE temporal3 DROP COLUMN valid_at CASCADE;
NOTICE:  drop cascades to constraint temporal_fk_rng2rng_fk on table temporal_fk_rng2rng
DROP TABLE temporal_fk_rng2rng;
DROP TABLE temporal3;
--
-- test FOREIGN KEY, range references range
--
-- test table setup
DROP TABLE temporal_rng;
CREATE TABLE temporal_rng (id int4range, valid_at daterange);
ALTER TABLE temporal_rng
  ADD CONSTRAINT temporal_rng_pk
  PRIMARY KEY (id, valid_at WITHOUT OVERLAPS);
-- Can't create a FK with a mismatched range type
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at int4range,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk2 PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk2 FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng (id, PERIOD valid_at)
);
ERROR:  foreign key constraint "temporal_fk_rng2rng_fk2" cannot be implemented
DETAIL:  Key columns "valid_at" and "valid_at" are of incompatible types: int4range and daterange.
-- works: PERIOD for both referenced and referencing
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng (id, PERIOD valid_at)
);
DROP TABLE temporal_fk_rng2rng;
-- with mismatched PERIOD columns:
-- (parent_id, PERIOD valid_at) REFERENCES (id, valid_at)
-- REFERENCES part should specify PERIOD
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng (id, valid_at)
);
ERROR:  foreign key uses PERIOD on the referencing table but not the referenced table
-- (parent_id, valid_at) REFERENCES (id, valid_at)
-- both should specify PERIOD:
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_rng (id, valid_at)
);
ERROR:  foreign key must use PERIOD when referencing a primary using WITHOUT OVERLAPS
-- (parent_id, valid_at) REFERENCES (id, PERIOD valid_at)
-- FOREIGN KEY part should specify PERIOD
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_rng (id, PERIOD valid_at)
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- (parent_id, valid_at) REFERENCES [implicit]
-- FOREIGN KEY part should specify PERIOD
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_rng
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- (parent_id, PERIOD valid_at) REFERENCES (id)
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng (id)
);
ERROR:  foreign key uses PERIOD on the referencing table but not the referenced table
-- (parent_id) REFERENCES (id, PERIOD valid_at)
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id)
		REFERENCES temporal_rng (id, PERIOD valid_at)
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- with inferred PK on the referenced table:
-- (parent_id, PERIOD valid_at) REFERENCES [implicit]
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng
);
DROP TABLE temporal_fk_rng2rng;
-- (parent_id) REFERENCES [implicit]
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id)
		REFERENCES temporal_rng
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- should fail because of duplicate referenced columns:
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD parent_id)
		REFERENCES temporal_rng (id, PERIOD id)
);
ERROR:  foreign key referenced-columns list must not contain duplicates
-- Two scalar columns
DROP TABLE temporal_rng2;
CREATE TABLE temporal_rng2 (
  id1 int4range,
  id2 int4range,
  valid_at daterange,
  CONSTRAINT temporal_rng2_pk PRIMARY KEY (id1, id2, valid_at WITHOUT OVERLAPS)
);
CREATE TABLE temporal_fk2_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id1 int4range,
	parent_id2 int4range,
	CONSTRAINT temporal_fk2_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk2_rng2rng_fk FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at)
		REFERENCES temporal_rng2 (id1, id2, PERIOD valid_at)
);
\d temporal_fk2_rng2rng
           Table "public.temporal_fk2_rng2rng"
   Column   |   Type    | Collation | Nullable | Default 
------------+-----------+-----------+----------+---------
 id         | int4range |           | not null | 
 valid_at   | daterange |           | not null | 
 parent_id1 | int4range |           |          | 
 parent_id2 | int4range |           |          | 
Indexes:
    "temporal_fk2_rng2rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
Foreign-key constraints:
    "temporal_fk2_rng2rng_fk" FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at) REFERENCES temporal_rng2(id1, id2, PERIOD valid_at)

DROP TABLE temporal_fk2_rng2rng;
--
-- test ALTER TABLE ADD CONSTRAINT
--
CREATE TABLE temporal_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng (id, PERIOD valid_at);
-- Two scalar columns:
CREATE TABLE temporal_fk2_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id1 int4range,
	parent_id2 int4range,
	CONSTRAINT temporal_fk2_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_fk2_rng2rng
	ADD CONSTRAINT temporal_fk2_rng2rng_fk
	FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at)
	REFERENCES temporal_rng2 (id1, id2, PERIOD valid_at);
\d temporal_fk2_rng2rng
           Table "public.temporal_fk2_rng2rng"
   Column   |   Type    | Collation | Nullable | Default 
------------+-----------+-----------+----------+---------
 id         | int4range |           | not null | 
 valid_at   | daterange |           | not null | 
 parent_id1 | int4range |           |          | 
 parent_id2 | int4range |           |          | 
Indexes:
    "temporal_fk2_rng2rng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
Foreign-key constraints:
    "temporal_fk2_rng2rng_fk" FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at) REFERENCES temporal_rng2(id1, id2, PERIOD valid_at)

-- with inferred PK on the referenced table, and wrong column type:
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk,
	ALTER COLUMN valid_at TYPE tsrange USING tsrange(lower(valid_at), upper(valid_at));
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
ERROR:  foreign key constraint "temporal_fk_rng2rng_fk" cannot be implemented
DETAIL:  Key columns "valid_at" and "valid_at" are of incompatible types: tsrange and daterange.
ALTER TABLE temporal_fk_rng2rng
	ALTER COLUMN valid_at TYPE daterange USING daterange(lower(valid_at)::date, upper(valid_at)::date);
-- with inferred PK on the referenced table:
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
-- should fail because of duplicate referenced columns:
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk2
	FOREIGN KEY (parent_id, PERIOD parent_id)
	REFERENCES temporal_rng (id, PERIOD id);
ERROR:  foreign key referenced-columns list must not contain duplicates
--
-- test with rows already
--
DELETE FROM temporal_fk_rng2rng;
DELETE FROM temporal_rng;
INSERT INTO temporal_rng (id, valid_at) VALUES
  ('[1,2)', daterange('2018-01-02', '2018-02-03')),
  ('[1,2)', daterange('2018-03-03', '2018-04-04')),
  ('[2,3)', daterange('2018-01-01', '2018-01-05')),
  ('[3,4)', daterange('2018-01-01', NULL));
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[1,2)', daterange('2018-01-02', '2018-02-01'), '[1,2)');
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[2,3)', daterange('2018-01-02', '2018-04-01'), '[1,2)');
-- should fail:
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), [2018-01-02,2018-04-01)) is not present in table "temporal_rng".
-- okay again:
DELETE FROM temporal_fk_rng2rng;
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
--
-- test pg_get_constraintdef
--
SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_fk_rng2rng_fk';
                                 pg_get_constraintdef                                  
---------------------------------------------------------------------------------------
 FOREIGN KEY (parent_id, PERIOD valid_at) REFERENCES temporal_rng(id, PERIOD valid_at)
(1 row)

--
-- test FK referencing inserts
--
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[1,2)', daterange('2018-01-02', '2018-02-01'), '[1,2)');
-- should fail:
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[2,3)', daterange('2018-01-02', '2018-04-01'), '[1,2)');
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), [2018-01-02,2018-04-01)) is not present in table "temporal_rng".
-- now it should work:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[1,2)', daterange('2018-02-03', '2018-03-03'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[2,3)', daterange('2018-01-02', '2018-04-01'), '[1,2)');
--
-- test FK referencing updates
--
UPDATE temporal_fk_rng2rng SET valid_at = daterange('2018-01-02', '2018-03-01') WHERE id = '[1,2)';
-- should fail:
UPDATE temporal_fk_rng2rng SET valid_at = daterange('2018-01-02', '2018-05-01') WHERE id = '[1,2)';
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), [2018-01-02,2018-05-01)) is not present in table "temporal_rng".
UPDATE temporal_fk_rng2rng SET parent_id = '[8,9)' WHERE id = '[1,2)';
ERROR:  insert or update on table "temporal_fk_rng2rng" violates foreign key constraint "temporal_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([8,9), [2018-01-02,2018-03-01)) is not present in table "temporal_rng".
-- ALTER FK DEFERRABLE
BEGIN;
  INSERT INTO temporal_rng (id, valid_at) VALUES
    ('[5,6)', daterange('2018-01-01', '2018-02-01')),
    ('[5,6)', daterange('2018-02-01', '2018-03-01'));
  INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES
    ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
  ALTER TABLE temporal_fk_rng2rng
    ALTER CONSTRAINT temporal_fk_rng2rng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_rng WHERE id = '[5,6)'; --should not fail yet.
COMMIT; -- should fail here.
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
--
-- test FK referenced updates NO ACTION
--
TRUNCATE temporal_rng, temporal_fk_rng2rng;
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng
	ON UPDATE NO ACTION;
-- a PK update that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01') WHERE id = '[5,6)';
-- a PK update that succeeds even though the numeric id is referenced because the range isn't:
DELETE FROM temporal_rng WHERE id = '[5,6)';
INSERT INTO temporal_rng (id, valid_at) VALUES
  ('[5,6)', daterange('2018-01-01', '2018-02-01')),
  ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
UPDATE temporal_rng SET valid_at = daterange('2016-02-01', '2016-03-01')
WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- a PK update that fails because both are referenced:
UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- a PK update that fails because both are referenced, but not 'til commit:
BEGIN;
  ALTER TABLE temporal_fk_rng2rng
    ALTER CONSTRAINT temporal_fk_rng2rng_fk
    DEFERRABLE INITIALLY DEFERRED;
  UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
COMMIT;
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- changing the scalar part fails:
UPDATE temporal_rng SET id = '[7,8)'
WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- then delete the objecting FK record and the same PK update succeeds:
DELETE FROM temporal_fk_rng2rng WHERE id = '[3,4)';
UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
--
-- test FK referenced updates RESTRICT
--
TRUNCATE temporal_rng, temporal_fk_rng2rng;
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng
	ON UPDATE RESTRICT;
-- a PK update that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01') WHERE id = '[5,6)';
-- a PK update that succeeds even though the numeric id is referenced because the range isn't:
DELETE FROM temporal_rng WHERE id = '[5,6)';
INSERT INTO temporal_rng (id, valid_at) VALUES
  ('[5,6)', daterange('2018-01-01', '2018-02-01')),
  ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
UPDATE temporal_rng SET valid_at = daterange('2016-02-01', '2016-03-01')
WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- a PK update that fails because both are referenced (even before commit):
BEGIN;
  ALTER TABLE temporal_fk_rng2rng
    ALTER CONSTRAINT temporal_fk_rng2rng_fk
    DEFERRABLE INITIALLY DEFERRED;
  UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
ROLLBACK;
-- changing the scalar part fails:
UPDATE temporal_rng SET id = '[7,8)'
WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- then delete the objecting FK record and the same PK update succeeds:
DELETE FROM temporal_fk_rng2rng WHERE id = '[3,4)';
UPDATE temporal_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
--
-- test FK referenced deletes NO ACTION
--
TRUNCATE temporal_rng, temporal_fk_rng2rng;
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng;
-- a PK delete that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
DELETE FROM temporal_rng WHERE id = '[5,6)';
-- a PK delete that succeeds even though the numeric id is referenced because the range isn't:
INSERT INTO temporal_rng (id, valid_at) VALUES
  ('[5,6)', daterange('2018-01-01', '2018-02-01')),
  ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- a PK delete that fails because both are referenced:
DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- a PK delete that fails because both are referenced, but not 'til commit:
BEGIN;
  ALTER TABLE temporal_fk_rng2rng
    ALTER CONSTRAINT temporal_fk_rng2rng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
COMMIT;
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
-- then delete the objecting FK record and the same PK delete succeeds:
DELETE FROM temporal_fk_rng2rng WHERE id = '[3,4)';
DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
--
-- test FK referenced deletes RESTRICT
--
TRUNCATE temporal_rng, temporal_fk_rng2rng;
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk;
ALTER TABLE temporal_fk_rng2rng
	ADD CONSTRAINT temporal_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_rng
	ON DELETE RESTRICT;
INSERT INTO temporal_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
DELETE FROM temporal_rng WHERE id = '[5,6)';
-- a PK delete that succeeds even though the numeric id is referenced because the range isn't:
INSERT INTO temporal_rng (id, valid_at) VALUES
  ('[5,6)', daterange('2018-01-01', '2018-02-01')),
  ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- a PK delete that fails because both are referenced (even before commit):
BEGIN;
  ALTER TABLE temporal_fk_rng2rng
    ALTER CONSTRAINT temporal_fk_rng2rng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "temporal_rng" violates foreign key constraint "temporal_fk_rng2rng_fk" on table "temporal_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_fk_rng2rng".
ROLLBACK;
-- then delete the objecting FK record and the same PK delete succeeds:
DELETE FROM temporal_fk_rng2rng WHERE id = '[3,4)';
DELETE FROM temporal_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
--
-- test ON UPDATE/DELETE options
--
-- test FK referenced updates CASCADE
INSERT INTO temporal_rng (id, valid_at) VALUES ('[6,7)', daterange('2018-01-01', '2021-01-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[4,5)', daterange('2018-01-01', '2021-01-01'), '[6,7)');
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng
		ON DELETE CASCADE ON UPDATE CASCADE;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
-- test FK referenced updates SET NULL
INSERT INTO temporal_rng (id, valid_at) VALUES ('[9,10)', daterange('2018-01-01', '2021-01-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[6,7)', daterange('2018-01-01', '2021-01-01'), '[9,10)');
ALTER TABLE temporal_fk_rng2rng
	DROP CONSTRAINT temporal_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng
		ON DELETE SET NULL ON UPDATE SET NULL;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
-- test FK referenced updates SET DEFAULT
INSERT INTO temporal_rng (id, valid_at) VALUES ('[-1,-1]', daterange(null, null));
INSERT INTO temporal_rng (id, valid_at) VALUES ('[12,13)', daterange('2018-01-01', '2021-01-01'));
INSERT INTO temporal_fk_rng2rng (id, valid_at, parent_id) VALUES ('[8,9)', daterange('2018-01-01', '2021-01-01'), '[12,13)');
ALTER TABLE temporal_fk_rng2rng
  ALTER COLUMN parent_id SET DEFAULT '[-1,-1]',
	DROP CONSTRAINT temporal_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_rng
		ON DELETE SET DEFAULT ON UPDATE SET DEFAULT;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
--
-- test FOREIGN KEY, multirange references multirange
--
-- Can't create a FK with a mismatched multirange type
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at int4multirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk2 PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk2 FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_mltrng (id, PERIOD valid_at)
);
ERROR:  foreign key constraint "temporal_fk_mltrng2mltrng_fk2" cannot be implemented
DETAIL:  Key columns "valid_at" and "valid_at" are of incompatible types: int4multirange and datemultirange.
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_mltrng (id, PERIOD valid_at)
);
DROP TABLE temporal_fk_mltrng2mltrng;
-- with mismatched PERIOD columns:
-- (parent_id, PERIOD valid_at) REFERENCES (id, valid_at)
-- REFERENCES part should specify PERIOD
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_mltrng (id, valid_at)
);
ERROR:  foreign key uses PERIOD on the referencing table but not the referenced table
-- (parent_id, valid_at) REFERENCES (id, valid_at)
-- both should specify PERIOD:
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_mltrng (id, valid_at)
);
ERROR:  foreign key must use PERIOD when referencing a primary using WITHOUT OVERLAPS
-- (parent_id, valid_at) REFERENCES (id, PERIOD valid_at)
-- FOREIGN KEY part should specify PERIOD
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_mltrng (id, PERIOD valid_at)
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- (parent_id, valid_at) REFERENCES [implicit]
-- FOREIGN KEY part should specify PERIOD
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, valid_at)
		REFERENCES temporal_mltrng
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- (parent_id, PERIOD valid_at) REFERENCES (id)
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_mltrng (id)
);
ERROR:  foreign key uses PERIOD on the referencing table but not the referenced table
-- (parent_id) REFERENCES (id, PERIOD valid_at)
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id)
		REFERENCES temporal_mltrng (id, PERIOD valid_at)
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- with inferred PK on the referenced table:
-- (parent_id, PERIOD valid_at) REFERENCES [implicit]
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_mltrng
);
DROP TABLE temporal_fk_mltrng2mltrng;
-- (parent_id) REFERENCES [implicit]
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id)
		REFERENCES temporal_mltrng
);
ERROR:  foreign key uses PERIOD on the referenced table but not the referencing table
-- should fail because of duplicate referenced columns:
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk_mltrng2mltrng_fk FOREIGN KEY (parent_id, PERIOD parent_id)
		REFERENCES temporal_mltrng (id, PERIOD id)
);
ERROR:  foreign key referenced-columns list must not contain duplicates
-- Two scalar columns
CREATE TABLE temporal_fk2_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id1 int4range,
	parent_id2 int4range,
	CONSTRAINT temporal_fk2_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_fk2_mltrng2mltrng_fk FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at)
		REFERENCES temporal_mltrng2 (id1, id2, PERIOD valid_at)
);
\d temporal_fk2_mltrng2mltrng
          Table "public.temporal_fk2_mltrng2mltrng"
   Column   |      Type      | Collation | Nullable | Default 
------------+----------------+-----------+----------+---------
 id         | int4range      |           | not null | 
 valid_at   | datemultirange |           | not null | 
 parent_id1 | int4range      |           |          | 
 parent_id2 | int4range      |           |          | 
Indexes:
    "temporal_fk2_mltrng2mltrng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
Foreign-key constraints:
    "temporal_fk2_mltrng2mltrng_fk" FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at) REFERENCES temporal_mltrng2(id1, id2, PERIOD valid_at)

DROP TABLE temporal_fk2_mltrng2mltrng;
--
-- test ALTER TABLE ADD CONSTRAINT
--
CREATE TABLE temporal_fk_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id int4range,
	CONSTRAINT temporal_fk_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at);
-- Two scalar columns:
CREATE TABLE temporal_fk2_mltrng2mltrng (
	id int4range,
	valid_at datemultirange,
	parent_id1 int4range,
	parent_id2 int4range,
	CONSTRAINT temporal_fk2_mltrng2mltrng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
ALTER TABLE temporal_fk2_mltrng2mltrng
	ADD CONSTRAINT temporal_fk2_mltrng2mltrng_fk
	FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at)
	REFERENCES temporal_mltrng2 (id1, id2, PERIOD valid_at);
\d temporal_fk2_mltrng2mltrng
          Table "public.temporal_fk2_mltrng2mltrng"
   Column   |      Type      | Collation | Nullable | Default 
------------+----------------+-----------+----------+---------
 id         | int4range      |           | not null | 
 valid_at   | datemultirange |           | not null | 
 parent_id1 | int4range      |           |          | 
 parent_id2 | int4range      |           |          | 
Indexes:
    "temporal_fk2_mltrng2mltrng_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
Foreign-key constraints:
    "temporal_fk2_mltrng2mltrng_fk" FOREIGN KEY (parent_id1, parent_id2, PERIOD valid_at) REFERENCES temporal_mltrng2(id1, id2, PERIOD valid_at)

-- should fail because of duplicate referenced columns:
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk2
	FOREIGN KEY (parent_id, PERIOD parent_id)
	REFERENCES temporal_mltrng (id, PERIOD id);
ERROR:  foreign key referenced-columns list must not contain duplicates
--
-- test with rows already
--
DELETE FROM temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[1,2)', datemultirange(daterange('2018-01-02', '2018-02-01')), '[1,2)');
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at);
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[2,3)', datemultirange(daterange('2018-01-02', '2018-04-01')), '[1,2)');
-- should fail:
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at);
ERROR:  insert or update on table "temporal_fk_mltrng2mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), {[2018-01-02,2018-04-01)}) is not present in table "temporal_mltrng".
-- okay again:
DELETE FROM temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at);
--
-- test pg_get_constraintdef
--
SELECT pg_get_constraintdef(oid) FROM pg_constraint WHERE conname = 'temporal_fk_mltrng2mltrng_fk';
                                   pg_get_constraintdef                                   
------------------------------------------------------------------------------------------
 FOREIGN KEY (parent_id, PERIOD valid_at) REFERENCES temporal_mltrng(id, PERIOD valid_at)
(1 row)

--
-- test FK referencing inserts
--
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[1,2)', datemultirange(daterange('2018-01-02', '2018-02-01')), '[1,2)');
-- should fail:
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[2,3)', datemultirange(daterange('2018-01-02', '2018-04-01')), '[1,2)');
ERROR:  insert or update on table "temporal_fk_mltrng2mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), {[2018-01-02,2018-04-01)}) is not present in table "temporal_mltrng".
-- now it should work:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[1,2)', datemultirange(daterange('2018-02-03', '2018-03-03')));
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[2,3)', datemultirange(daterange('2018-01-02', '2018-04-01')), '[1,2)');
--
-- test FK referencing updates
--
UPDATE temporal_fk_mltrng2mltrng SET valid_at = datemultirange(daterange('2018-01-02', '2018-03-01')) WHERE id = '[1,2)';
-- should fail:
UPDATE temporal_fk_mltrng2mltrng SET valid_at = datemultirange(daterange('2018-01-02', '2018-05-01')) WHERE id = '[1,2)';
ERROR:  insert or update on table "temporal_fk_mltrng2mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), {[2018-01-02,2018-05-01)}) is not present in table "temporal_mltrng".
UPDATE temporal_fk_mltrng2mltrng SET parent_id = '[8,9)' WHERE id = '[1,2)';
ERROR:  insert or update on table "temporal_fk_mltrng2mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk"
DETAIL:  Key (parent_id, valid_at)=([8,9), {[2018-01-02,2018-03-01)}) is not present in table "temporal_mltrng".
-- ALTER FK DEFERRABLE
BEGIN;
  INSERT INTO temporal_mltrng (id, valid_at) VALUES
    ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01'))),
    ('[5,6)', datemultirange(daterange('2018-02-01', '2018-03-01')));
  INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES
    ('[3,4)', datemultirange(daterange('2018-01-05', '2018-01-10')), '[5,6)');
  ALTER TABLE temporal_fk_mltrng2mltrng
    ALTER CONSTRAINT temporal_fk_mltrng2mltrng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_mltrng WHERE id = '[5,6)'; --should not fail yet.
COMMIT; -- should fail here.
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
--
-- test FK referenced updates NO ACTION
--
TRUNCATE temporal_mltrng, temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at)
	ON UPDATE NO ACTION;
-- a PK update that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01')));
UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-01-01', '2016-02-01')) WHERE id = '[5,6)';
-- a PK update that succeeds even though the numeric id is referenced because the range isn't:
DELETE FROM temporal_mltrng WHERE id = '[5,6)';
INSERT INTO temporal_mltrng (id, valid_at) VALUES
  ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01'))),
  ('[5,6)', datemultirange(daterange('2018-02-01', '2018-03-01')));
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[3,4)', datemultirange(daterange('2018-01-05', '2018-01-10')), '[5,6)');
UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-02-01', '2016-03-01'))
WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-02-01', '2018-03-01'));
-- a PK update that fails because both are referenced:
UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-01-01', '2016-02-01'))
WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
-- a PK update that fails because both are referenced, but not 'til commit:
BEGIN;
  ALTER TABLE temporal_fk_mltrng2mltrng
    ALTER CONSTRAINT temporal_fk_mltrng2mltrng_fk
    DEFERRABLE INITIALLY DEFERRED;
  UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-01-01', '2016-02-01'))
  WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
COMMIT;
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
-- changing the scalar part fails:
UPDATE temporal_mltrng SET id = '[7,8)'
WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
--
-- test FK referenced updates RESTRICT
--
TRUNCATE temporal_mltrng, temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at)
	ON UPDATE RESTRICT;
-- a PK update that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01')));
UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-01-01', '2016-02-01')) WHERE id = '[5,6)';
-- a PK update that succeeds even though the numeric id is referenced because the range isn't:
DELETE FROM temporal_mltrng WHERE id = '[5,6)';
INSERT INTO temporal_mltrng (id, valid_at) VALUES
  ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01'))),
  ('[5,6)', datemultirange(daterange('2018-02-01', '2018-03-01')));
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[3,4)', datemultirange(daterange('2018-01-05', '2018-01-10')), '[5,6)');
UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-02-01', '2016-03-01'))
WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-02-01', '2018-03-01'));
-- a PK update that fails because both are referenced (even before commit):
BEGIN;
  ALTER TABLE temporal_fk_mltrng2mltrng
    ALTER CONSTRAINT temporal_fk_mltrng2mltrng_fk
    DEFERRABLE INITIALLY DEFERRED;
  UPDATE temporal_mltrng SET valid_at = datemultirange(daterange('2016-01-01', '2016-02-01'))
  WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
ROLLBACK;
-- changing the scalar part fails:
UPDATE temporal_mltrng SET id = '[7,8)'
WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
--
-- test FK referenced deletes NO ACTION
--
TRUNCATE temporal_mltrng, temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at);
-- a PK delete that succeeds because the numeric id isn't referenced:
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01')));
DELETE FROM temporal_mltrng WHERE id = '[5,6)';
-- a PK delete that succeeds even though the numeric id is referenced because the range isn't:
INSERT INTO temporal_mltrng (id, valid_at) VALUES
  ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01'))),
  ('[5,6)', datemultirange(daterange('2018-02-01', '2018-03-01')));
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[3,4)', datemultirange(daterange('2018-01-05', '2018-01-10')), '[5,6)');
DELETE FROM temporal_mltrng WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-02-01', '2018-03-01'));
-- a PK delete that fails because both are referenced:
DELETE FROM temporal_mltrng WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
-- a PK delete that fails because both are referenced, but not 'til commit:
BEGIN;
  ALTER TABLE temporal_fk_mltrng2mltrng
    ALTER CONSTRAINT temporal_fk_mltrng2mltrng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_mltrng WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
COMMIT;
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
--
-- test FK referenced deletes RESTRICT
--
TRUNCATE temporal_mltrng, temporal_fk_mltrng2mltrng;
ALTER TABLE temporal_fk_mltrng2mltrng
	DROP CONSTRAINT temporal_fk_mltrng2mltrng_fk;
ALTER TABLE temporal_fk_mltrng2mltrng
	ADD CONSTRAINT temporal_fk_mltrng2mltrng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_mltrng (id, PERIOD valid_at)
	ON DELETE RESTRICT;
INSERT INTO temporal_mltrng (id, valid_at) VALUES ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01')));
DELETE FROM temporal_mltrng WHERE id = '[5,6)';
-- a PK delete that succeeds even though the numeric id is referenced because the range isn't:
INSERT INTO temporal_mltrng (id, valid_at) VALUES
  ('[5,6)', datemultirange(daterange('2018-01-01', '2018-02-01'))),
  ('[5,6)', datemultirange(daterange('2018-02-01', '2018-03-01')));
INSERT INTO temporal_fk_mltrng2mltrng (id, valid_at, parent_id) VALUES ('[3,4)', datemultirange(daterange('2018-01-05', '2018-01-10')), '[5,6)');
DELETE FROM temporal_mltrng WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-02-01', '2018-03-01'));
-- a PK delete that fails because both are referenced (even before commit):
BEGIN;
  ALTER TABLE temporal_fk_mltrng2mltrng
    ALTER CONSTRAINT temporal_fk_mltrng2mltrng_fk
    DEFERRABLE INITIALLY DEFERRED;
  DELETE FROM temporal_mltrng WHERE id = '[5,6)' AND valid_at = datemultirange(daterange('2018-01-01', '2018-02-01'));
ERROR:  update or delete on table "temporal_mltrng" violates foreign key constraint "temporal_fk_mltrng2mltrng_fk" on table "temporal_fk_mltrng2mltrng"
DETAIL:  Key (id, valid_at)=([5,6), {[2018-01-01,2018-02-01)}) is still referenced from table "temporal_fk_mltrng2mltrng".
ROLLBACK;
--
-- test FOREIGN KEY, box references box
-- (not allowed: PERIOD part must be a range or multirange)
--
CREATE TABLE temporal_box (
  id int4range,
  valid_at box,
  CONSTRAINT temporal_box_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
);
\d temporal_box
              Table "public.temporal_box"
  Column  |   Type    | Collation | Nullable | Default 
----------+-----------+-----------+----------+---------
 id       | int4range |           | not null | 
 valid_at | box       |           | not null | 
Indexes:
    "temporal_box_pk" PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)

CREATE TABLE temporal_fk_box2box (
  id int4range,
  valid_at box,
  parent_id int4range,
  CONSTRAINT temporal_fk_box2box_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
  CONSTRAINT temporal_fk_box2box_fk FOREIGN KEY (parent_id, PERIOD valid_at)
    REFERENCES temporal_box (id, PERIOD valid_at)
);
ERROR:  invalid type for PERIOD part of foreign key
DETAIL:  Only range and multirange are supported.
--
-- FK between partitioned tables
--
CREATE TABLE temporal_partitioned_rng (
	id int4range,
	valid_at daterange,
  name text,
	CONSTRAINT temporal_paritioned_rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS)
) PARTITION BY LIST (id);
CREATE TABLE tp1 partition OF temporal_partitioned_rng FOR VALUES IN ('[1,2)', '[3,4)', '[5,6)', '[7,8)', '[9,10)', '[11,12)');
CREATE TABLE tp2 partition OF temporal_partitioned_rng FOR VALUES IN ('[2,3)', '[4,5)', '[6,7)', '[8,9)', '[10,11)', '[12,13)');
INSERT INTO temporal_partitioned_rng (id, valid_at, name) VALUES
  ('[1,2)', daterange('2000-01-01', '2000-02-01'), 'one'),
  ('[1,2)', daterange('2000-02-01', '2000-03-01'), 'one'),
  ('[2,3)', daterange('2000-01-01', '2010-01-01'), 'two');
CREATE TABLE temporal_partitioned_fk_rng2rng (
	id int4range,
	valid_at daterange,
	parent_id int4range,
	CONSTRAINT temporal_partitioned_fk_rng2rng_pk PRIMARY KEY (id, valid_at WITHOUT OVERLAPS),
	CONSTRAINT temporal_partitioned_fk_rng2rng_fk FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_partitioned_rng (id, PERIOD valid_at)
) PARTITION BY LIST (id);
CREATE TABLE tfkp1 partition OF temporal_partitioned_fk_rng2rng FOR VALUES IN ('[1,2)', '[3,4)', '[5,6)', '[7,8)', '[9,10)', '[11,12)');
CREATE TABLE tfkp2 partition OF temporal_partitioned_fk_rng2rng FOR VALUES IN ('[2,3)', '[4,5)', '[6,7)', '[8,9)', '[10,11)', '[12,13)');
--
-- partitioned FK referencing inserts
--
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES
  ('[1,2)', daterange('2000-01-01', '2000-02-15'), '[1,2)'),
  ('[1,2)', daterange('2001-01-01', '2002-01-01'), '[2,3)'),
  ('[2,3)', daterange('2000-01-01', '2000-02-15'), '[1,2)');
-- should fail:
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES
  ('[3,4)', daterange('2010-01-01', '2010-02-15'), '[1,2)');
ERROR:  insert or update on table "tfkp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([1,2), [2010-01-01,2010-02-15)) is not present in table "temporal_partitioned_rng".
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES
  ('[3,4)', daterange('2000-01-01', '2000-02-15'), '[3,4)');
ERROR:  insert or update on table "tfkp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_fk"
DETAIL:  Key (parent_id, valid_at)=([3,4), [2000-01-01,2000-02-15)) is not present in table "temporal_partitioned_rng".
--
-- partitioned FK referencing updates
--
UPDATE temporal_partitioned_fk_rng2rng SET valid_at = daterange('2000-01-01', '2000-02-13') WHERE id = '[2,3)';
-- move a row from the first partition to the second
UPDATE temporal_partitioned_fk_rng2rng SET id = '[4,5)' WHERE id = '[1,2)';
-- move a row from the second partition to the first
UPDATE temporal_partitioned_fk_rng2rng SET id = '[1,2)' WHERE id = '[4,5)';
-- should fail:
UPDATE temporal_partitioned_fk_rng2rng SET valid_at = daterange('2000-01-01', '2000-04-01') WHERE id = '[1,2)';
ERROR:  conflicting key value violates exclusion constraint "tfkp1_pkey"
DETAIL:  Key (id, valid_at)=([1,2), [2000-01-01,2000-04-01)) conflicts with existing key (id, valid_at)=([1,2), [2000-01-01,2000-04-01)).
--
-- partitioned FK referenced updates NO ACTION
--
TRUNCATE temporal_partitioned_rng, temporal_partitioned_fk_rng2rng;
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2016-01-01', '2016-02-01'));
UPDATE temporal_partitioned_rng SET valid_at = daterange('2018-01-01', '2018-02-01') WHERE id = '[5,6)';
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
UPDATE temporal_partitioned_rng SET valid_at = daterange('2016-02-01', '2016-03-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- should fail:
UPDATE temporal_partitioned_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "tp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_parent_id_valid_at_fkey" on table "temporal_partitioned_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_partitioned_fk_rng2rng".
--
-- partitioned FK referenced deletes NO ACTION
--
TRUNCATE temporal_partitioned_rng, temporal_partitioned_fk_rng2rng;
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
DELETE FROM temporal_partitioned_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- should fail:
DELETE FROM temporal_partitioned_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "tp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_parent_id_valid_at_fkey" on table "temporal_partitioned_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_partitioned_fk_rng2rng".
--
-- partitioned FK referenced updates RESTRICT
--
TRUNCATE temporal_partitioned_rng, temporal_partitioned_fk_rng2rng;
ALTER TABLE temporal_partitioned_fk_rng2rng
	DROP CONSTRAINT temporal_partitioned_fk_rng2rng_fk;
ALTER TABLE temporal_partitioned_fk_rng2rng
	ADD CONSTRAINT temporal_partitioned_fk_rng2rng_fk
	FOREIGN KEY (parent_id, PERIOD valid_at)
	REFERENCES temporal_partitioned_rng
	ON DELETE RESTRICT;
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2016-01-01', '2016-02-01'));
UPDATE temporal_partitioned_rng SET valid_at = daterange('2018-01-01', '2018-02-01') WHERE id = '[5,6)';
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
UPDATE temporal_partitioned_rng SET valid_at = daterange('2016-02-01', '2016-03-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- should fail:
UPDATE temporal_partitioned_rng SET valid_at = daterange('2016-01-01', '2016-02-01')
  WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "tp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_parent_id_valid_at_fkey" on table "temporal_partitioned_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_partitioned_fk_rng2rng".
--
-- partitioned FK referenced deletes RESTRICT
--
TRUNCATE temporal_partitioned_rng, temporal_partitioned_fk_rng2rng;
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-01-01', '2018-02-01'));
INSERT INTO temporal_partitioned_rng (id, valid_at) VALUES ('[5,6)', daterange('2018-02-01', '2018-03-01'));
INSERT INTO temporal_partitioned_fk_rng2rng (id, valid_at, parent_id) VALUES ('[3,4)', daterange('2018-01-05', '2018-01-10'), '[5,6)');
DELETE FROM temporal_partitioned_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-02-01', '2018-03-01');
-- should fail:
DELETE FROM temporal_partitioned_rng WHERE id = '[5,6)' AND valid_at = daterange('2018-01-01', '2018-02-01');
ERROR:  update or delete on table "tp1" violates foreign key constraint "temporal_partitioned_fk_rng2rng_parent_id_valid_at_fkey" on table "temporal_partitioned_fk_rng2rng"
DETAIL:  Key (id, valid_at)=([5,6), [2018-01-01,2018-02-01)) is still referenced from table "temporal_partitioned_fk_rng2rng".
--
-- partitioned FK referenced updates CASCADE
--
ALTER TABLE temporal_partitioned_fk_rng2rng
	DROP CONSTRAINT temporal_partitioned_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_partitioned_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_partitioned_rng
		ON DELETE CASCADE ON UPDATE CASCADE;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
--
-- partitioned FK referenced deletes CASCADE
--
--
-- partitioned FK referenced updates SET NULL
--
ALTER TABLE temporal_partitioned_fk_rng2rng
	DROP CONSTRAINT temporal_partitioned_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_partitioned_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_partitioned_rng
		ON DELETE SET NULL ON UPDATE SET NULL;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
--
-- partitioned FK referenced deletes SET NULL
--
--
-- partitioned FK referenced updates SET DEFAULT
--
ALTER TABLE temporal_partitioned_fk_rng2rng
  ALTER COLUMN parent_id SET DEFAULT '[-1,-1]',
	DROP CONSTRAINT temporal_partitioned_fk_rng2rng_fk,
	ADD CONSTRAINT temporal_partitioned_fk_rng2rng_fk
		FOREIGN KEY (parent_id, PERIOD valid_at)
		REFERENCES temporal_partitioned_rng
		ON DELETE SET DEFAULT ON UPDATE SET DEFAULT;
ERROR:  unsupported ON UPDATE action for foreign key constraint using PERIOD
--
-- partitioned FK referenced deletes SET DEFAULT
--
DROP TABLE temporal_partitioned_fk_rng2rng;
DROP TABLE temporal_partitioned_rng;
RESET datestyle;