Hyracks fixes for Asterix issue 9 in hyracks_fix_asterix_issue_9

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Purpose of code changes on this branch:

Required changes to fix Asterix issue 9, in particular:
- The addition of an ITupleFilter that is passed in insert/update operators for 
tree indexes, to filter out NULLs

When reviewing my code changes, please focus on:
- Interface changes to Algebricks.
- New interfaces and their design/implications.

The changes are consolidated into r1483 in hyracks_fix_asterix_issue_9_review.

After the review, I'll merge this branch into:
hyracks_asterix_stabilization

Original issue reported on code.google.com by alexande...@gmail.com on 15 May 2012 at 1:59

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Original comment by alexande...@gmail.com on 21 May 2012 at 4:17

• Changed state: Done