[jira] [Updated] (HIVE-22337) Improve and Expand Text-Based SerDes

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-22337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stamatis Zampetakis updated HIVE-22337:
---------------------------------------
    Fix Version/s:     (was: 4.0.0)

I cleared the fixVersion field since this ticket is not resolved. Please review this ticket and if the fix is already committed to a specific version please set the version accordingly and mark the ticket as RESOLVED.

According to the JIRA guidelines (https://cwiki.apache.org/confluence/display/Hive/HowToContribute) the fixVersion should be set only when the issue is resolved/closed.

> Improve and Expand Text-Based SerDes
> ------------------------------------
>
>                 Key: HIVE-22337
>                 URL: https://issues.apache.org/jira/browse/HIVE-22337
>             Project: Hive
>          Issue Type: Improvement
>          Components: Serializers/Deserializers
>    Affects Versions: 4.0.0
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-22337.1.patch, HIVE-22337.2.patch
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> * Add new SerDe package just for text-based formats: org.apache.hadoop.hive.serde2.text.*
> * Add new SerDe package just for text-based log formats: org.apache.hadoop.hive.serde2.text.log.*
> * Create a coherent hierarchy for processing delimited data: AbstractSerDe -> TextSerDe -> EncodingAwareTextSerde -> DelimitedSerDe -> CsvTextSerDe
> * Create a coherent hierarchy for processing regex'ed data: AbstractSerDe -> TextSerDe -> EncodingAwareTextSerde -> RegexSerDe -> CommonFormatLogSerDe
> * Create some standard text processors for super-quick out-of-the-box processing: TSV SerDe and CSV SerDe
> * Create some standard log processors for super-quick out-of-the-box processing: Apache Common Log Format and Apache Combined Log Format (Apache HTTP Server Log Parsers)
> * Better default behaviors for processing text
> The default behavior should allow users to quick query data without any failures.
> # When a blank line is encountered, insert a 'null' value for each column
> # When there are fewer fields in the data than defined in the table schema, shift all available fields left, and fill in 'null' values for all remaining fields
> # When there are too many fields in the data, the last field in the results will contain all remaining values.  Currently, the data is silently swallows and a warning is issued in the YARN logs.  A normal user will never see this warning, especially if the job completes successfully.  Better to (by default) provide them all the data than to hide anything.
> {code:none|title=CSV SerDe}
> "1,2,3"    = ["1","2","3"]
> "1,2,"     = ["1","2",null]
> ""         = [null,null,null]
> "1,2,3,4"  = ["1","2","3,4"]
> {code}



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