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Interface Expressions.ExecExpr

public interface ExecExpr
ExecExpr is created in the process of creating the executable structure from the best plan produced by the optimizer.

Method Index

o evaluate(Tuple, Tuple)
ExecExpr always evaluates to a single types.

Methods

o evaluate 
 public abstract DTE_Type evaluate(Tuple left,
                                   Tuple right)
ExecExpr always evaluates to a single types. However the input can be two tuples (if this expression is evaluated in a join method), or it can be only one tuple if this expression is evaluated as a part of a unary operator, such as file-scan. 

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