ClickHouse/tests/queries/0_stateless/01161_information_schema.sql

SHOW TABLES FROM information_schema;
SHOW TABLES FROM INFORMATION_SCHEMA;

DROP TABLE IF EXISTS t;
DROP VIEW IF EXISTS v;
DROP VIEW IF EXISTS mv;
DROP TABLE IF EXISTS tmp;

CREATE TABLE t (n UInt64, f Float32, s String, fs FixedString(42), d Decimal(9, 6)) ENGINE=Memory;
CREATE VIEW v (n Nullable(Int32), f Float64) AS SELECT n, f FROM t;
CREATE MATERIALIZED VIEW mv ENGINE=Null AS SELECT * FROM system.one;
CREATE TEMPORARY TABLE tmp (d Date, dt DateTime, dtms DateTime64(3));


-- FIXME #28687
SELECT * FROM information_schema.schemata WHERE schema_name ilike 'information_schema';
-- SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE (TABLE_SCHEMA=currentDatabase() OR TABLE_SCHEMA='') AND TABLE_NAME NOT LIKE '%inner%';
SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE (table_schema=currentDatabase() OR table_schema='') AND table_name NOT LIKE '%inner%';
SELECT * FROM information_schema.views WHERE table_schema=currentDatabase();
-- SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE (TABLE_SCHEMA=currentDatabase() OR TABLE_SCHEMA='') AND TABLE_NAME NOT LIKE '%inner%';
SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE (table_schema=currentDatabase() OR table_schema='') AND table_name NOT LIKE '%inner%';

-- mixed upper/lowercase schema and table name:
SELECT count() FROM information_schema.TABLES WHERE table_schema=currentDatabase() AND table_name = 't';
SELECT count() FROM INFORMATION_SCHEMA.tables WHERE table_schema=currentDatabase() AND table_name = 't';
SELECT count() FROM INFORMATION_schema.tables WHERE table_schema=currentDatabase() AND table_name = 't'; -- { serverError UNKNOWN_DATABASE }
SELECT count() FROM information_schema.taBLES WHERE table_schema=currentDatabase() AND table_name = 't'; -- { serverError UNKNOWN_TABLE }

drop view mv;
drop view v;
drop table t;