/*
* Expr translation helper methods
*/
public PTFExpressionDef buildExpressionDef(ShapeDetails inpShape, ASTNode arg)
throws HiveException {
PTFExpressionDef argDef = new PTFExpressionDef();
ExprNodeDesc exprNode = semAly.genExprNodeDesc(arg, inpShape.getRr(),
inpShape.getTypeCheckCtx());
ExprNodeEvaluator exprEval = WindowingExprNodeEvaluatorFactory.get(llInfo, exprNode);
ObjectInspector oi = initExprNodeEvaluator(exprEval, exprNode, inpShape);
argDef.setExpressionTreeString(arg.toStringTree());
argDef.setExprNode(exprNode);
argDef.setExprEvaluator(exprEval);
argDef.setOI(oi);
return argDef;
}