5;
INT;

5.3;
DOUBLE;

'bla';
VARCHAR;

True;
bool;

false;
bool;

null;
null;
CASE WHEN x THEN NULL ELSE 1 END;
INT;

CASE WHEN x THEN 1 ELSE NULL END;
INT;

IF(true, 1, null);
INT;

IF(true, null, 1);
INT;

STRUCT(1 AS col);
STRUCT<col INT>;

STRUCT(1 AS col, 2.5 AS row);
STRUCT<col INT, row DOUBLE>;

STRUCT(1);
STRUCT<INT>;

STRUCT(1 AS col, 2.5 AS row, struct(3.5 AS inner_col, 4 AS inner_row) AS nested_struct);
STRUCT<col INT, row DOUBLE, nested_struct STRUCT<inner_col DOUBLE, inner_row INT>>;

STRUCT(1 AS col, 2.5, ARRAY[1, 2, 3] AS nested_array, 'foo');
STRUCT<col INT, DOUBLE, nested_array ARRAY<INT>, VARCHAR>;

STRUCT(1, 2.5, 'bar');
STRUCT<INT, DOUBLE, VARCHAR>;

STRUCT(1 AS "CaseSensitive");
STRUCT<"CaseSensitive" INT>;

# dialect: duckdb
STRUCT_PACK(a := 1, b := 2.5);
STRUCT<a INT, b DOUBLE>;

# dialect: presto
ROW(1, 2.5, 'foo');
STRUCT<INT, DOUBLE, VARCHAR>;