JPA Space is not allowed after parameter prefix ':'

使用JPA的自定義SQL語句進行查詢，使用:=進行變量賦值時，報org.hibernate.QueryException: Space is not allowed after parameter prefix ':'異常。

SELECT
	t.rn
FROM
(
	SELECT
		sentry_code,
		( SELECT @rownum := @rownum + 1 FROM (SELECT @rownum := 0) r ) AS rn
	FROM
		t_integral
	WHERE
		sentry_code LIKE ?1
	ORDER BY
		all_amount DESC
) t
WHERE
	t.sentry_code = ?2;

解決方案：

1. 經過添加反斜槓 \\ 來轉義 : ，否則Hibernate不識別賦值符號 :=（親測可用） 。

2. 使用/*/:=/*/也能夠解決，（沒有測試過是否可行）

SELECT
	t.rn
FROM
	(
		SELECT
			sentry_code,
			(SELECT @rownum \\:= @rownum + 1 FROM (SELECT @rownum \\:= 0) r) AS rn
		FROM
			t_integral
		ORDER BY
			all_amount DESC
	) t
WHERE
	t.sentry_code =?1

 對應的Java代碼以下：

@Query(value = "SELECT t.rn FROM (SELECT sentry_code,(SELECT @rownum \\:= @rownum+1 FROM (SELECT @rownum \\:= 0) r) AS rn FROM t_integral ORDER BY all_amount DESC) t WHERE t.sentry_code=?1", nativeQuery = true)
    int getMyIntegralAllPostSort(String sentryCode);