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From "Jason Altekruse (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2071) Better documentation for JSON reader all_text_mode option
Date Mon, 26 Jan 2015 19:01:34 GMT
Jason Altekruse created DRILL-2071:
--------------------------------------

             Summary: Better documentation for JSON reader all_text_mode option
                 Key: DRILL-2071
                 URL: https://issues.apache.org/jira/browse/DRILL-2071
             Project: Apache Drill
          Issue Type: Bug
          Components: Documentation
            Reporter: Jason Altekruse
            Assignee: Bridget Bevens
             Fix For: 0.7.0


Currently Drill will fail by default to read JSON files with changes in schema, or with several
different data types in a list. These files can however be read if the store.json.all_text_mode
option is set to true. This option will read all data from the JSON files as varchar and from
here the data can be casted to an appropriate type (or filtered out in the case where a cast
to numeric is desired but some of the data in the column is a string or boolean type). This
is only mentioned on the wiki in this page, but does not really describe all of the use cases
of the feature. https://cwiki.apache.org/confluence/display/DRILL/Analyzing+Yelp+JSON+Data+with+Apache+Drill



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