Dynamically passing Table name as parameter in Stored Procedure in U-SQL

[HermeetB]

I want to pass the Table name as in-parameter in a stored procedure in U-SQL and then want to have a SELECT * FROM the table. Something like below ::

USE DATABASE ADLDEMO;

CREATE PROCEDURE IF NOT EXISTS sp_demo
(@TargetTableName string)
AS
BEGIN;

@A=
SELECT * FROM @TargetTableName;

OUTPUT @A
TO "/ADL-Demo/viewmultiple.csv"
USING Outputters.Csv(outputHeader:true);

END;

but this is giving me error like "Rowset variable @TargetTableName was not found in the procedure 'sp_demo'."

can anyone please help on how to do select * from a table passed as in-parameter?

[MikeRys]

Hi Hermeet

U-SQL (like any other SQL dialect) currently does not support table name parameterizations.

The current workaround is to generate the script either via PowerShell, T4, or another U-SQL Script (depending on how you get the parameter values and what your preferred workflow is), and then submit that generated script.