在 Google Data Studio 中创建动态日期参数时出现问题

Question

我正在尝试在我的代码中为我的开始日期和结束日期添加日期参数。该代码试图在从日期参数中选择的一段时间内摊销收入。

但是，我收到错误消息“未找到表值函数”。有人知道我为什么会收到此错误吗？

编辑：

所有数据都来自我的 BigQuery 中的表。我碰巧附加了多个表并保存为一个视图，我从中查询它们。

原始表的列如下：

User | fullname | subscription_start_date | subscription_end_date | Amount

我编写了一个代码，通过考虑订阅持续时间和从动态日期输入中选择的期间来摊销金额。

现在的问题是，在写完下面的代码后，我得到了 Table-function not available 的错误。不知道这意味着什么。

CASE
--Sub falls within the selected period
WHEN DATE_DIFF(@DS_END_DATE,'2000-01-01', DAY) >= DATE_DIFF(end_at,'2000-01-01', DAY) AND DATE_DIFF(@DS_START_DATE,'2000-01-01', DAY) <= DATE_DIFF(start_at,'2000-01-01', DAY) THEN CAST(t1.amount AS NUMERIC)
--Selected period falls within the sub period
WHEN DATE_DIFF(@DS_END_DATE,'2000-01-01', DAY) <= DATE_DIFF(end_at,'2000-01-01', DAY) AND DATE_DIFF(@DS_START_DATE,'2000-01-01', DAY) >= DATE_DIFF(start_at,'2000-01-01', DAY) THEN 
(DATE_DIFF(@DS_END_DATE,'2000-01-01', DAY) - DATE_DIFF(@DS_START_DATE,'2000-01-01', DAY))/(DATE_DIFF(end_at,'2000-01-01', DAY) - DATE_DIFF(start_at,'2000-01-01', DAY)) * CAST(t1.amount AS NUMERIC)
-- Subscription starts within but ends outside the selected period
WHEN DATE_DIFF(@DS_END_DATE, '2000-01-01', DAY) <= DATE_DIFF(end_at,'2000-01-01', DAY) AND DATE_DIFF(@DS_START_DATE,'2000-01-01', DAY) <= DATE_DIFF(start_at,'2000-01-01', DAY) THEN 
(DATE_DIFF(@DS_END_DATE, '2000-01-01', DAY) - DATE_DIFF(start_at, '2000-01-01', DAY))/(DATE_DIFF(end_at, '2000-01-01', DAY) - DATE_DIFF(start_at, '2000-01-01', DAY)) * CAST(t1.amount AS NUMERIC)
-- Subscription starts outside of but ends within the selected period
WHEN DATE_DIFF(@DS_END_DATE, '2000-01-01', DAY) >= DATE_DIFF(end_at, '2000-01-01', DAY) AND DATE_DIFF(@DS_START_DATE, '2000-01-01', DAY) >= DATE_DIFF(start_at, '2000-01-01', DAY) THEN 
(DATE_DIFF(end_at, '2000-01-01', DAY) - DATE_DIFF(@DS_START_DATE, '2000-01-01', DAY))/(DATE_DIFF(end_at, '2000-01-01', DAY) - DATE_DIFF(start_at, '2000-01-01', DAY)) * CAST(t1.amount AS NUMERIC)
END AS real_revenue

real_revenue 应该是所选时间段内每次订阅的贡献。

注意：数据洞察日期参数由@DS_START_DATE 和@DS_END_DATE 表示

Answer 1

快速查看此Doc，它似乎暗示您不能在视图中使用查询参数，而@DS_START_DATE、@DS_END_DATE 是查询参数。

如果您将原始查询（用于构建视图的查询）包含为子查询，则应该可以正常工作。然后，您可以在添加数据源时将自定义查询添加到 datastudio 中，只需将查询复制到该 UI 中，它应该可以使用 Date 参数（如果勾选）

旁注：我已经稍微简化了您的查询并添加了子查询。

SELECT *,
CASE
--Sub falls within the selected period
WHEN DATE_DIFF(@DS_END_DATE, end_at, DAY) > 0 AND DATE_DIFF(@DS_START_DATE, start_at, DAY) < 0 THEN CAST(t1.amount as NUMERIC) 

--Selected period falls within the sub period
WHEN DATE_DIFF(@DS_END_DATE, end_at, DAY) < 0 AND DATE_DIFF(@DS_START_DATE, start_at, DAY) > 0 THEN  
DATE_DIFF(@DS_END_DATE, @DS_START_DATE, DAY) / DATE_DIFF(end_at, start_at, DAY) * CAST(t1.amount AS NUMERIC)

-- Subscription starts within but ends outside the selected period
WHEN DATE_DIFF(@DS_END_DATE, end_at, DAY) > 0 AND DATE_DIFF(@DS_START_DATE, start_at, DAY) > 0 THEN 
DATE_DIFF(@DS_END_DATE, start_at, DAY) / DATE_DIFF(end_at, start_at, DAY) * CAST(t1.amount AS NUMERIC)

-- Subscription starts outside of but ends within the selected period
WHEN DATE_DIFF(@DS_END_DATE, end_at, DAY) < 0 AND DATE_DIFF(@DS_START_DATE, start_at, DAY) > 0 THEN 
DATE_DIFF(end_at,@DS_START_DATE, DAY) / DATE_DIFF(end_at, start_at, DAY) * CAST(t1.amount AS NUMERIC)

END AS real_revenue

FROM ( 
  -- YOUR ORIGINAL VIEW CREATION QUERY
)
WHERE
 -- any conditions you might want to add.