Temporal functions grouped into a common library for byte based storage

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/Algebricks 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