Azure数据湖分析空输出文件

Question

I need help, can't see the issue of this problem: I am provisioning an Azure Data Lake Store with a Stream Analytics jobs. File are tab separated and the job is running without errors.

I deployed an Azure Data Lake Analytics service to aggregate data like this:

@input = 
EXTRACT [applicationname] string,
        [clientip] string,
        [continent] string,
        [country] string,
        [province] string,
        [city] string,
        [latitude] string,
        [longitude] string
FROM "adl://mydatalakesotre.azuredatalakestore.net/instrumentationoutput/mystore/2017-10-22/{*}"
USING Extractors.Text(delimiter: '\t', skipFirstNRows: 1, silent: true);

OUTPUT @input 
TO "output/PowerBI_output.tsv"
USING Outputters.Tsv(outputHeader: true);

I can't find the way to make it working... I Have other 5 MB of input data, but the output got only the headers, as specify in the query... What am I missing.

Thanks for the help.

Answer 1

As Bob mentions in the comment, you are getting an empty result because you most likely have a misalignment in your schema definition and the actual files that you extract from.

I suggest that you open the file in the ADL Tools of Visual Studio and use the CREATE EXTRACT statement wizard to create you the EXTRACT statement. If you still get error messages (after removing silent:true ), please update your question with the detected error message and we will give you an updated answer.