[jira] [Resolved] (HAWQ-53) Avro Union(complex) type containing nullable type and using null as default failed

["Shivram Mani (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HAWQ-53?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shivram Mani resolved HAWQ-53.
------------------------------
    Resolution: Fixed

> Avro Union(complex) type containing nullable type and using null as default failed
> ----------------------------------------------------------------------------------
>
>                 Key: HAWQ-53
>                 URL: https://issues.apache.org/jira/browse/HAWQ-53
>             Project: Apache HAWQ
>          Issue Type: Bug
>          Components: PXF
>            Reporter: Goden Yao
>            Assignee: Shivram Mani
>         Attachments: meetme.avsc, meetme_example.json
>
>
> *Current Behavior*
> Create pxf external table with an avro schema which contains complex nullable type with null as default value would fail.
> *Expected Behavior*
> The complex avro types should be properly mapped to HAWQ types and create table should have no error with data loaded.
> *Analysis*
> From code review [AvroResolver.java|https://github.com/apache/incubator-hawq/blob/master/pxf/pxf-hdfs/src/main/java/com/pivotal/pxf/plugins/hdfs/AvroResolver.java], we didn't specify null situation for complex types:
> - Array
> - Map
> - Record
> when using union type , which contains a nullable type(union) and use null as default - I think complex type with nullable type in value schema and with null as default is the problem.
> {code:javascript}
> ...
> "name" : "meta__kvpairs",
>     "type" : [ "null", {
>       "type" : "map",
>       "values" : [ "null", "string" ],
>       "default" : null
>     } ],
>     "default" : null
>   },
> ...
> {code}
> Create external table from pxf to read it:
> {code:sql}
> "CREATE EXTERNAL TABLE meetmeevent_hdfs(
> sourcetimestamp bigint,
> sourceagent varchar(200),
> sourceip_address varchar(20),
> meetmeuser_id bigint,
> meetmeinterested_uid bigint,
> meetmevote varchar(4),
> meetmeis_match int,
> meetmenetwork_score bigint,
> meetmeresponsiveness_score bigint,
> meetmesession_id varchar(32),
> meetmefriends int,
> meetmeprevious_view varchar(32), 
> meetmemodel bigint,
> meetmescore float8,
> meetmemethod int,
> meetmecontributions varchar(120),
> meetmeclicksource varchar(20),
> meetmeclickaction varchar(20),
> meetmeprofileview_ts bigint,
> meetmeplatform varchar(20),
> metatopic_name varchar(100),
> metarequest_user_agent varchar(200),
> metarequest_session_id varchar(50),
> metarequest_id text,
> metakvpairs varchar(1000),
> meta_handlers varchar(1000)
> )
> LOCATION ('pxf://dahdp2nn01.tag-dev.com:50070/data/ramblas/event_log/meetme/20150824/12/s_meetme.20.0.3492572.11600054147.1440442800000.avro?PROFILE=Avro&DATA-SCHEMA=/data/ramblas/schema/meetme')
> FORMAT 'CUSTOM' (formatter='pxfwritable_import');
> {code}



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