# name: test/sql/table_function/duckdb_constraints.test
# description: Test duckdb_constraints function
# group: [table_function]

statement ok
create table integers(i int primary key, check (i < 10));

statement ok
create table test(i varchar unique, k varchar, check(len(i || k) < 10));

statement ok
create table fk_integers(j int, foreign key (j) references integers(i));

statement ok
create table fk_integers_2(k int, foreign key (k) references integers(i));

statement ok nosort duckdb_col
SELECT * FROM duckdb_constraints();

statement ok nosort duckdb_col
SELECT * FROM duckdb_constraints;

query IIII
SELECT table_name, constraint_index, constraint_type, UNNEST(constraint_column_names) col_name FROM duckdb_constraints ORDER BY table_name, constraint_index, col_name
----
fk_integers	0	FOREIGN KEY	j
fk_integers_2	1	FOREIGN KEY	k
integers	2	PRIMARY KEY	i
integers	3	CHECK	i
integers	4	NOT NULL	i
test	5	UNIQUE	i
test	6	CHECK	i
test	6	CHECK	k

query II
SELECT constraint_name, unique_constraint_name FROM information_schema.referential_constraints ORDER BY constraint_name
----
fk_integers_2_k_i_fkey	integers_i_pkey
fk_integers_j_i_fkey	integers_i_pkey

query IIII
SELECT column_name, constraint_name, table_name, position_in_unique_constraint FROM information_schema.key_column_usage ORDER BY constraint_name
----
k	fk_integers_2_k_i_fkey	fk_integers_2	1
j	fk_integers_j_i_fkey	fk_integers	1
i	integers_i_pkey	integers	NULL
i	test_i_key	test	NULL

query III
SELECT constraint_name, table_name, constraint_type FROM information_schema.table_constraints ORDER BY constraint_name;
----
fk_integers_2_k_i_fkey	fk_integers_2	FOREIGN KEY
fk_integers_j_i_fkey	fk_integers	FOREIGN KEY
integers_i_check	integers	CHECK
integers_i_not_null	integers	CHECK
integers_i_pkey	integers	PRIMARY KEY
test_i_k_check	test	CHECK
test_i_key	test	UNIQUE