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I was trying to extract data from a JSON file using USQL. Either the query runs successfully without producing any output data or results in 'vertex failed fast error'.
The JSON file looks like:
And my U-SQL script is
arghtype2 Answers
Actually the JSONExtractor supports the rowpath parameter expressed in JSONPath that gives you the ability to identify the JSON object or JSON array items that you want to map into rows. So you can extract your data with a single statement from your JSON document:
Sarath,
the problem was that your @trail2 output was a json array '[{...},{...}]' which the JsonFunction can't parse, as far as I can tell. So I outputted that to a file and reread it with the inputter, which can parse arrays.