[GitHub] drill issue #914: DRILL-5657: Size-aware vector writer structure

[paul-rogers]

Github user paul-rogers commented on the issue:

    https://github.com/apache/drill/pull/914
  
    Merged a set of enhancements & bug fixes. Compared to the first set of 
commits:
    
    * Provides tools to print the sometimes-complex tuple model, schema and 
writer object used for complex data types.
    * Sharpens up the specification of the client API used to write data, 
especially for obscure cases such as abandoning rows, vector overflow inside 
deep structures, etc.
    * Revises the internal “WriterEvents” API used to pass events down the 
writer hierarchy in response to the API revisions.
    * Fully handles the case where a client chooses to “abandon” and 
rewrite a row (perhaps based on a filter condition.)
    * A couple of minor vector revisions. RepeatedMapVector allows building an 
instance from an existing offset vector (needed when harvesting batches with 
overflow.)
    * Adds more Javadoc.
    * Added many unit tests.
    * Fixes in response to unit tests.
    * Moved vector cache into result set loader layer.
    
    Remaining open issues:
    
    * Column projection
    * Support for lists and repeated lists


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