Class CoalesceFunction

  • All Implemented Interfaces:
    InvocationEvaluator

    public class CoalesceFunction
    extends java.lang.Object
    implements InvocationEvaluator
    Evaluator for the function COALESCE(numExpr[, numExpr2[, numExpr3] etc]). Returns the first not null argument.
    • Constructor Detail

      • CoalesceFunction

        public CoalesceFunction()
    • Method Detail

      • evaluate

        public java.lang.Object evaluate​(InvokeExpression expr,
                                         java.lang.Object ignored,
                                         InMemoryExpressionEvaluator eval)
        Description copied from interface: InvocationEvaluator
        Method to evaluate the InvokeExpression, as part of the overall evaluation defined by the InMemoryExpressionEvaluator.
        Specified by:
        evaluate in interface InvocationEvaluator
        Parameters:
        expr - The expression for invocation
        ignored - Value on which we are invoking
        eval - The overall evaluator for in-memory
        Returns:
        The result