should be it

external/duckdb/test/sql/pragma/test_show_tables.test

@@ -0,0 +1,136 @@
+# name: test/sql/pragma/test_show_tables.test
+# description: Test SHOW/DESCRIBE tables
+# group: [pragma]
+
+statement ok
+CREATE TABLE integers(i INTEGER, j INTEGER)
+
+statement ok
+CREATE TABLE "select"(i INTEGER);
+
+statement ok
+CREATE VIEW v1 AS SELECT DATE '1992-01-01' AS k
+
+statement ok
+CREATE TABLE t2 (id INTEGER PRIMARY KEY, j VARCHAR UNIQUE)
+
+statement ok
+CREATE SCHEMA s1;
+
+statement ok
+CREATE TABLE s1.tbl(i INTEGER UNIQUE);
+
+statement ok
+CREATE INDEX my_index ON s1.tbl(i);
+
+statement ok
+CREATE TABLE tbl(i INTEGER PRIMARY KEY);
+
+statement ok
+CREATE INDEX not_a_table ON tbl(i);
+
+# We test that right table is described (from s1 schema)
+# column_name | column_type | null | key | default | extra
+query TTTITI
+DESCRIBE s1.tbl;
+----
+i	INTEGER	YES	UNI	NULL	NULL
+
+# We test that the index can't be described
+statement error
+DESCRIBE my_index;
+----
+
+# We test that right table is described (from main schema)
+# column_name | column_type | null | key | default | extra
+query TTTITI
+DESCRIBE tbl;
+----
+i	INTEGER	NO	PRI	NULL	NULL
+
+# Validate PRI and UNI constrains
+# column_name | column_type | null | key | default | extra
+query TTTITI
+DESCRIBE t2
+----
+id	INTEGER	NO	PRI	NULL	NULL
+j	VARCHAR	YES	UNI	NULL	NULL
+
+# equivalent to DESCRIBE t2
+# column_name | column_type | null | key | default | extra
+query TTTITI
+PRAGMA "SHOW"('t2')
+----
+id	INTEGER	NO	PRI	NULL	NULL
+j	VARCHAR	YES	UNI	NULL	NULL
+
+# SHOW and DESCRIBE are aliases
+query T
+SHOW TABLES
+----
+integers
+select
+t2
+tbl
+v1
+
+query T
+DESCRIBE TABLES
+----
+integers
+select
+t2
+tbl
+v1
+
+# internally they are equivalent to PRAGMA SHOW_TABLES();
+query T
+PRAGMA show_tables
+----
+integers
+select
+t2
+tbl
+v1
+
+# column_name | column_type | null | key | default | extra
+query TTTITI
+SHOW integers
+----
+i	INTEGER	YES	NULL	NULL	NULL
+j	INTEGER	YES	NULL	NULL	NULL
+
+# column_name | column_type | null | key | default | extra
+query TTTITI
+SHOW "select";
+----
+i	INTEGER	YES	NULL	NULL	NULL
+
+# equivalent to PRAGMA SHOW('integers')
+# column_name | column_type | null | key | default | extra
+query TTTITI
+PRAGMA "SHOW"('integers')
+----
+i	INTEGER	YES	NULL	NULL	NULL
+j	INTEGER	YES	NULL	NULL	NULL
+
+# we can also describe views
+# column_name | column_type | null | key | default | extra
+query TTTITI
+DESCRIBE v1
+----
+k	DATE	YES	NULL	NULL	NULL
+
+# view over show tables
+statement ok
+CREATE VIEW show_tables_view AS ( SHOW TABLES );
+
+query T
+SELECT * FROM show_tables_view ORDER BY ALL
+----
+integers
+select
+show_tables_view
+t2
+tbl
+v1