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From "Till Westmann (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (VXQUERY-91) Temporal functions grouped into a common library for byte based storage
Date Fri, 26 Apr 2013 04:06:16 GMT

     [ https://issues.apache.org/jira/browse/VXQUERY-91?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Till Westmann updated VXQUERY-91:
---------------------------------

    Description: 
VXQuery utilizes Algebricks and Hyracks to build a XQuery processor that execute on a cluster.
Reviewing the list of query languages build upon the same base, there is a common need for
date/time/duration manipulation. XQuery provides a great basis for other languages, like AsterixQL,
wrt its date/time/duration manipulation features. 

Building a common library of this functionality for XQuery, AsterixQL, and other languages
on the Hyracks/Algebrix stack would allow for a simplified code base.
In addition to only having to implement these features in one place, the new library could
fill in the holes in VXQuery's implementation and provide missing date/time/duration features
for AsterixQL. 

Key Features for Library:
 - Written in Java 
 - Optimized to work with out objects (use byte arrays)
 - Standardized date/time/duration API
 - Useful to other Hyracks applications 

Review of tasks:
 - Consolidate date/time/duration code into one library
 - Update XQuery to use the library
 - Validate all XQuery date/time/duration functions through the test harness
 - Create a patch for AsterixQL for to utilize the new library

Optional tasks:
 - Additional non-XQuery date/time/duration features



  was:
VXQuery utilizes Algebricks and Hyracks to build a XQuery process that can run in distributed
system. Reviewing the list of query languages build upon the same base, there is a common
need for temporal functionality. XQuery provides a great base for other languages, like AsterixQL,
in respect to temporal functionality. 

Building a common library of functionality for both XQuery and AsterixQL would allow for simplified
code base. In addition to only having to implement temporal features in one place. The new
library could fill in the holes in VXQuery's temporal implementation and provide missing temporal
features for AsterixQL. One library would keep more complex temporal features out of the way.

Key Features for Library:
 - Written in Java 
 - Optimized to work with out objects (use byte arrays)
 - Standardized temporal API
 - Useful to other Hyracks applications 

Review of tasks:
 - Consolidate temporal code into one library
 - Update XQuery to use the library
 - Validate all XQuery temporal functions through the test harness
 - Create a patch for AsterixQL for to utilize the new library

Optional tasks:
 - Temporal Units for the library
 - Additional non-XQuery temporal features



    
> Temporal functions grouped into a common library for byte based storage
> -----------------------------------------------------------------------
>
>                 Key: VXQUERY-91
>                 URL: https://issues.apache.org/jira/browse/VXQUERY-91
>             Project: VXQuery
>          Issue Type: Improvement
>            Reporter: Preston Carman
>            Assignee: Vinayak Borkar
>              Labels: gsoc2013
>
> VXQuery utilizes Algebricks and Hyracks to build a XQuery processor that execute on a
cluster. Reviewing the list of query languages build upon the same base, there is a common
need for date/time/duration manipulation. XQuery provides a great basis for other languages,
like AsterixQL, wrt its date/time/duration manipulation features. 
> Building a common library of this functionality for XQuery, AsterixQL, and other languages
on the Hyracks/Algebrix stack would allow for a simplified code base.
> In addition to only having to implement these features in one place, the new library
could fill in the holes in VXQuery's implementation and provide missing date/time/duration
features for AsterixQL. 
> Key Features for Library:
>  - Written in Java 
>  - Optimized to work with out objects (use byte arrays)
>  - Standardized date/time/duration API
>  - Useful to other Hyracks applications 
> Review of tasks:
>  - Consolidate date/time/duration code into one library
>  - Update XQuery to use the library
>  - Validate all XQuery date/time/duration functions through the test harness
>  - Create a patch for AsterixQL for to utilize the new library
> Optional tasks:
>  - Additional non-XQuery date/time/duration features

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