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SPL(Structured Process Language) A programming language specially for structured data computing.

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package com.scudata.expression.mfn.cursor;

import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.expression.CursorFunction;
import com.scudata.expression.Expression;
import com.scudata.resources.EngineMessage;

/**
 * ????α??????????ܣ?????ֵ????
 * cs.total(y,??) ֻ??һ??yʱ???ص?ֵ
 * @author RunQian
 *
 */
public class Total extends CursorFunction {
	public Object calculate(Context ctx) {
		if (param == null) {
			MessageManager mm = EngineMessage.get();
			throw new RQException("total" + mm.getMessage("function.missingParam"));
		}
		
		Expression []exps = param.toArray("total", false);
		return cursor.total(exps, ctx);
	}
}