message: Add some simple tests
diff: @@ -24,6 +24,11 @@ SELECT table_type FROM information_schema_tables() WHERE table_schema='scheme' A
  ----
  BASE TABLE
  +query ITT
  +SELECT ordinal_position, column_name, data_type FROM information_schema_columns() WHERE table_name='integers'
  +----
  +1 i INTEGER
  +
  statement ok
  CREATE TEMPORARY TABLE floats (f FLOAT);
  @@ -40,6 +45,11 @@ SELECT table_type FROM information_schema_tables() WHERE table_schema='scheme' A
  ----
  VIEW
  +query ITT
  +SELECT ordinal_position, column_name, data_type FROM information_schema_columns() WHERE table_schema='scheme' AND table_name='vintegers'
  +----
  +1 i INTEGER
  +
  statement ok
  DROP SCHEMA scheme CASCADE;
  @@ -52,3 +62,8 @@ query I
  SELECT COUNT(*) FROM information_schema_tables() WHERE table_schema='scheme'
  ----
  0
  +
  +query I
  +SELECT COUNT(*) FROM information_schema_columns() WHERE table_schema='scheme'
  +----
  +0
  