Expression string builder bug, JODA cannot handle white space
implement function to cast from long to date, timestamp
fix or, query uncomment and add absolute reference.
Add the date expressions in the tpch queries
fix merging receiver
in partition sender, on Iteroutcome.STOP, cleanup without flushing
in partition sender, release incoming vectors after partitioning
set def recordCount for explain
Build the IfExpression correcty in ExpressionStringBuilder
Use IntExpression instead of LongExpression for integers
Create CastExpression and traverse visitor pattern while performing implicit cast in ExpressionTreeMaterializer.
Bug in DrillOptiq while generating cast functions to Float, Double, IntervalYear and IntervalDay
allocate 100 bytes/record for variable length in partition sender
DRILL-437: Add support for POSTFIX operators.
1. IS NULL/IS NOT NULL
2. IS TRUE/IS FALSE
3. IS NOT TRUE/IS NOT FALSE
Adjust project's trait field id based on the mapping from input to output.   Output Rel and Logicl Rel for debug purpose.
Revert "Create CastExpression and traverse visitor pattern while performing implicit cast in ExpressionTreeMaterializer."

This reverts commit b7c76c218a7359e99140bc8ee8eeef65f950d7ee.
Add couple of optiq rule into logical plan phase. Add operator mapping for is not null, is true.
handle double project by copying
Fix the duplicate field names in join operator.  Work in progress for column star.
bit agg functions
not function implementation