Reynold Xin created SPARK-9150:
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Summary: Create a trait to track lack of code generation for
expressions
Key: SPARK-9150
URL: https://issues.apache.org/jira/browse/SPARK-9150
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Assignee: Reynold Xin
Priority: Critical
It is very hard to track which expression supports code generation or not. This
patch removes the default gencode implementation from Expression, and moves the
default fallback implementation into a new trait called CodegenFallback. Each
concrete expression needs to either implement code generation, or mix in
CodegenFallback.
This makes it very easy to track which expressions have code generation
implemented already.
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