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From "Daniel Barclay (Drill) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2646) CONVERT_TO/CONVERT_FROM syntax (arguments) not specified
Date Wed, 01 Apr 2015 04:29:52 GMT
Daniel Barclay (Drill) created DRILL-2646:

             Summary: CONVERT_TO/CONVERT_FROM syntax (arguments) not specified
                 Key: DRILL-2646
                 URL: https://issues.apache.org/jira/browse/DRILL-2646
             Project: Apache Drill
          Issue Type: Bug
          Components: Documentation
            Reporter: Daniel Barclay (Drill)
            Assignee: Bridget Bevens

On the SQL Functions page at http://drill.apache.org/docs/sql-functions/, the 
section on the CONVERT_TO and CONVERT_FROM functions never specifies the syntax (doesn't specify
how many parameters each takes, which parameter is which) or semantics (including what the
parameters are).

Additionally, the name "Type" for the first column is confusing, since the values in that
column do not seem to be Drill SQL types.  Would something roughly like "type specifier" or
"conversion specifier" be more accurate?

Also, the connection between the values in the Type column and the functions isn't clear.
 Besides their being no specification of the parameters (to say where a value from the Type
would go), the example at the end of the section doesn't use any of the values in the Type
column (or, in fact, any value in the whole table). (If the string literal "'JSON'" in that
CONVERT_FROM is an example of the kind of thing listed in the Type column, then why isn't
"JSON" listed in that column (and what else is missing)?

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