should be it

external/duckdb/test/sql/pragma/test_table_info.test

@@ -0,0 +1,111 @@
+# name: test/sql/pragma/test_table_info.test
+# description: Test table_info pragma
+# group: [pragma]
+
+statement ok
+CREATE TABLE integers(i INTEGER DEFAULT 1+3, j INTEGER)
+
+# PRAGMA table_info(table) returns information on the table
+query ITTTTT nosort table_info
+PRAGMA table_info('integers');
+----
+0	i	INTEGER	0	1 + 3	0
+1	j	INTEGER	0	NULL	0
+
+# these are all equivalent
+query ITTTTT nosort table_info
+PRAGMA table_info(integers);
+----
+
+query ITTTTT nosort table_info
+PRAGMA table_info='integers';
+----
+
+query ITTTTT nosort table_info
+PRAGMA table_info=integers;
+----
+
+# table_info on view also works
+statement ok
+CREATE VIEW v1 AS SELECT 42::INTEGER AS a, 'hello' AS b
+
+query ITTTTT
+PRAGMA table_info('v1')
+----
+0	a	INTEGER	0	NULL	0
+1	b	VARCHAR	0	NULL	0
+
+# view with explicit aliases
+statement ok
+CREATE VIEW v2(c) AS SELECT 42::INTEGER AS a, 'hello' AS b
+
+query ITTTTT
+PRAGMA table_info('v2')
+----
+0	c	INTEGER	0	NULL	0
+1	b	VARCHAR	0	NULL	0
+
+statement ok
+CREATE VIEW v3(c, d) AS SELECT DATE '1992-01-01', 'hello' AS b
+
+query ITTTTT
+PRAGMA table_info('v3')
+----
+0	c	DATE	0	NULL	0
+1	d	VARCHAR	0	NULL	0
+
+# test table info with other schemas
+statement ok
+CREATE SCHEMA test
+
+statement ok
+CREATE VIEW test.v1 AS SELECT 42::INTEGER AS a, 'hello' AS b
+
+query ITTTTT
+PRAGMA table_info('test.v1')
+----
+0	a	INTEGER	0	NULL	0
+1	b	VARCHAR	0	NULL	0
+
+statement error
+PRAGMA table_info('nonexistant_table');
+----
+
+# handle constraints + default values
+statement ok
+create table tconstraint1(i integer primary key default(3), j blob not null);
+
+query ITTTTT
+PRAGMA table_info(tconstraint1)
+----
+0	i	INTEGER	1	3	1
+1	j	BLOB	1	NULL	0
+
+# multi-column pk
+statement ok
+create table tconstraint2(i integer, j integer, k integer, l integer unique, primary key(i, j, k));
+
+query ITTTTT
+PRAGMA table_info(tconstraint2)
+----
+0	i	INTEGER	1	NULL	1
+1	j	INTEGER	1	NULL	1
+2	k	INTEGER	1	NULL	1
+3	l	INTEGER	0	NULL	0
+
+# incorrect number of parameters
+statement error
+PRAGMA table_info(1,2,3);
+----
+
+statement ok
+create table t1 (
+	c1 int,
+	c2 int generated always as (c1 + 1)
+);
+
+query IIIIII
+SELECT * FROM pragma_table_info(t1);
+----
+0	c1	INTEGER	false	NULL	false
+1	c2	INTEGER	false	CAST((c1 + 1) AS INTEGER)	false