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Date: Mon, 20 Jul 2009 17:57:14 -0700 (PDT)
From: "Zheng Shao (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Created: (HIVE-658) Allow conversions from string to complex
 types
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Allow conversions from string to complex types
----------------------------------------------

                 Key: HIVE-658
                 URL: https://issues.apache.org/jira/browse/HIVE-658
             Project: Hadoop Hive
          Issue Type: New Feature
          Components: Serializers/Deserializers
            Reporter: Zheng Shao


Assuming the format of representing complex types in string, we should be able to convert strings to complex types.

This can happen in several cases:

1. Serializing a string into a column of a table which is complex-typed.
2. Sending a string into a UDF/GenericUDF which accepts complex types.
3. User explicitly do type casting using syntax like CAST(mystring AS array<int>)

We should assume a default format (maybe JSON, or maybe ^A, ^B, ^C format).

This makes it easier for people to produce complex types from their transform scripts.

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