源选项中的 Azure 数据工厂递归查询
Azure Data Factory Recursive Query in source option
我正在尝试使用查询选项在 Azure 数据工厂源中执行递归查询。
然而，即使在 with 语句之前写 go 或 ;，数据工厂也是无法投影列。如果我写（在 with 子句之前）：
- “开始”，我遇到了这个错误
"shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near 'r'. If this is intended to be a common table expression, you need to explicitly terminate the previous statement with a semi-colon."
- 如果我写“;”，我就有这个
shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near ';'.
- 如果我什么都不写s
haded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near the keyword 'with'.
所以我想知道在 Azure 数据工厂中是否不允许使用这种代码，或者我是否遗漏了什么。
您可以在数据流的源选项中输入的查询非常有限，因为它甚至不支持 order by 子句。但是，您可以引用用户定义的函数，这样您就可以将 CTE 嵌套在 UDF 中，然后从源选项中引用它。
Query: If you select Query in the input field, enter a SQL query for your source. This setting overrides any table that you've chosen in the dataset. Order By clauses aren't supported here, but you can set a full SELECT FROM statement. You can also use user-defined table functions. select * from udfGetData() is a UDF in SQL that returns a table. This query will produce a source table that you can use in your data flow. Using queries is also a great way to reduce rows for testing or for lookups.
我正在尝试使用查询选项在 Azure 数据工厂源中执行递归查询。
然而，即使在 with 语句之前写 go 或 ;，数据工厂也是无法投影列。如果我写（在 with 子句之前）：
- “开始”，我遇到了这个错误
"shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near 'r'. If this is intended to be a common table expression, you need to explicitly terminate the previous statement with a semi-colon." - 如果我写“;”，我就有这个
shaded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near ';'. - 如果我什么都不写s
haded.msdataflow.com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near the keyword 'with'.
所以我想知道在 Azure 数据工厂中是否不允许使用这种代码，或者我是否遗漏了什么。
您可以在数据流的源选项中输入的查询非常有限，因为它甚至不支持 order by 子句。但是，您可以引用用户定义的函数，这样您就可以将 CTE 嵌套在 UDF 中，然后从源选项中引用它。
Query: If you select Query in the input field, enter a SQL query for your source. This setting overrides any table that you've chosen in the dataset. Order By clauses aren't supported here, but you can set a full SELECT FROM statement. You can also use user-defined table functions. select * from udfGetData() is a UDF in SQL that returns a table. This query will produce a source table that you can use in your data flow. Using queries is also a great way to reduce rows for testing or for lookups.