[jira] [Created] (PHOENIX-1826) Implement TrackOrderPreservingExpressionCompiler as Expression visitor instead of ParseNode visitor

["James Taylor (JIRA)" <ji...@apache.org>]

James Taylor created PHOENIX-1826:
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             Summary: Implement TrackOrderPreservingExpressionCompiler as Expression visitor instead of ParseNode visitor
                 Key: PHOENIX-1826
                 URL: https://issues.apache.org/jira/browse/PHOENIX-1826
             Project: Phoenix
          Issue Type: Task
            Reporter: James Taylor


We currently traverse the ORDER BY ParseNodes in TrackOrderPreservingExpressionCompiler to determine if the rows will be ordered in row key order. This complicates supporting ORDER BY expressions that are an ordinal position (PHOENIX-1749), since it's a fair bit of code to manufacture a ParseNode when wildcards are used in the select. We should consider writing this visitor as an Expression instead and then using ordinal position would be easy as we could index into the RowProjector to get an Expression.



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