import duckdb

def get_varchar_cols():
    conn = duckdb.connect()
    conn.execute("INSTALL httpfs; LOAD httpfs;")
    conn.execute("SET s3_region='sgp1';")
    conn.execute("SET s3_endpoint='sgp1.digitaloceanspaces.com';")
    conn.execute("SET s3_url_style='path';")
    
    rows = conn.execute("DESCRIBE SELECT * FROM read_parquet('s3://nearle/parquet/deliveries/*.parquet')").fetchall()
    varchars = [row[0] for row in rows if row[1] == 'VARCHAR']
    print("VARCHAR Columns:", varchars)

if __name__ == "__main__":
    get_varchar_cols()