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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.phoenix.expression.function;

import java.sql.SQLException;
import java.util.List;

import org.apache.phoenix.compile.StatementContext;
import org.apache.phoenix.expression.Expression;
import org.apache.phoenix.parse.CurrentDateParseNode;
import org.apache.phoenix.parse.FunctionParseNode.BuiltInFunction;
import org.apache.phoenix.parse.FunctionParseNode.FunctionClassType;


/**
 * 
 * Function used to represent NOW()
 * The function returns a {@link org.apache.phoenix.schema.types.PTimestamp}
 *
 */
@BuiltInFunction(name = NowFunction.NAME,
        nodeClass=CurrentDateParseNode.class, args= {}, classType = FunctionClassType.ALIAS, derivedFunctions = {CurrentDateFunction.class})
public abstract class NowFunction extends ScalarFunction {
    
    public static final String NAME = "NOW";

    public NowFunction() {}
    
    public NowFunction(List children) throws SQLException {
        super(children);
    }

    @Override
    public String getName() {
        return NAME;
    }   
    
}