WITH RECURSIVE Star AS (
       SELECT 1 AS RowNums,  CAST(REPEAT('* ', 1) AS CHAR(2000)) AS Patterns
    UNION ALL
       SELECT RowNums + 1,  CAST(REPEAT('* ', rowNums + 1) AS CHAR(2000))
    FROM Star
    WHERE RowNums < 20
)
SELECT Patterns
FROM Star;