BigQuery 用戶定義函數錯誤 - 無法在查詢中調用 UDF

Question

我正在嘗試使用我在 BQ 數據集中創建的用戶定義函數。

這是UDF：

CREATE OR REPLACE FUNCTION `project.dataset.CountHolidays`(START_DATE DATETIME, 
SLA INT64, OPERATION STRING) AS (
(
        SELECT
            SUM(CASE WHEN OPERATION = 'OPTION 1' THEN OPTION_1
                WHEN OPERATION = 'OPTION 2' THEN OPTION_2
                WHEN OPERATION = 'OPTION 3' THEN OPTION_3
                WHEN OPERATION = 'OPTION 4' THEN OPTION_4
                WHEN OPERATION = 'OPTION 5' THEN OPTION_5
                WHEN OPERATION = 'OPTION 6' THEN OPTION_6
            END)
    FROM
        `project.dataset.calendar` cal
    WHERE
        cal.CALENDAR_DATE BETWEEN START_DATE AND DATE_ADD(START_DATE, INTERVAL SLA DAY)
)

);

我試圖在這樣的查詢中調用 UDF：

SELECT 
ORDER_NUMBER,
 `project.dataset.CountHolidays`(DATE(PICK_RELEASE_DATE), EBS_SERVICE_DAYS, WAREHOUSE_ID) as CountHolidays
FROM `different_project.different_dataset.view_name`

我收到以下錯誤並且無法運行查詢：

LEFT OUTER JOIN cannot be used without a condition that is an equality of fields from both sides of the join.

有誰知道這里的錯誤是什么？ 已經撓我的頭幾個小時了。 謝謝。

Answer 1

您的選擇引用了 UDF，該 UDF 被“翻譯”為不受支持的左連接 - 因此錯誤！

嘗試以下版本的 UDF - 我認為應該可以

CREATE OR REPLACE FUNCTION `project.dataset.CountHolidays`(START_DATE DATE, 
SLA INT64, OPERATION STRING) AS (
(
        SELECT
            SUM(IF(cal.CALENDAR_DATE BETWEEN START_DATE AND DATE_ADD(START_DATE, INTERVAL SLA DAY),
            CASE WHEN OPERATION = 'OPTION 1' THEN OPTION_1
                WHEN OPERATION = 'OPTION 2' THEN OPTION_2
                WHEN OPERATION = 'OPTION 3' THEN OPTION_3
                WHEN OPERATION = 'OPTION 4' THEN OPTION_4
                WHEN OPERATION = 'OPTION 5' THEN OPTION_5
                WHEN OPERATION = 'OPTION 6' THEN OPTION_6
            END, 0))
    FROM
        `project.dataset.calendar` cal
));