U-SQL error in Azure Data Lake Analytics - azure-data-lake

Question

I'm trying to execute a simple pipeline in azure data lake analytics, but I'm having some trouble with U-SQL. I was wondering if someone can give a helping hand.
My Query:
DECLARE #log_file string = "/datalake/valores.tsv";
DECLARE #summary_file string = "/datalake/output.tsv";
#log = EXTRACT valor string from #log_file USING Extractors.Tsv();
#summary = select sum(int.valor) as somavalor from #log;OUTPUT #summary
TO #summary_file USING Outputters.Tsv();
Error:
Erro
Other general doubts:
1. When I deploy a new pipeline to ADF sometimes it doesn't appear in the activity window and sometime it does. I didn't get the logic. (I'm using the OneTime pipeline mode)
2. There is a better way to create new pipeline (other than manipulate raw Json files?)
3.There is any U-SQL parser? What is the easiest way to teste my query?
Thanks a lot.

Answer 1

U-SQL is case-sensitive so your U-SQL should look more like this:
DECLARE #log_file string = "/datalake/valores.tsv";
DECLARE #summary_file string = "/datalake/output.tsv";
#log =
EXTRACT valor int
FROM #log_file
USING Extractors.Tsv();
#summary =
SELECT SUM(valor) AS somavalor
FROM #log;
OUTPUT #summary
TO #summary_file USING Outputters.Tsv();
I have assumed your input file has only a single column of type int.
Use Visual Studio U-SQL projects, VS Code U-SQL add-in to ensure you write valid U-SQL. You can also submit U-SQL jobs via the portal.