text: /**
   * @license
   * Copyright 2014 The Lovefield Project Authors. All Rights Reserved.
   *
   * Licensed 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.
   */
  goog.provide('lf.proc.SkipStep');
  
  goog.require('lf.proc.PhysicalQueryPlanNode');
  goog.require('lf.proc.Relation');
  
  
  
  /**
   * @constructor @struct
   * @extends {lf.proc.PhysicalQueryPlanNode}
   */
  lf.proc.SkipStep = function() {
    lf.proc.SkipStep.base(this, 'constructor',
        1,
        lf.proc.PhysicalQueryPlanNode.ExecType.FIRST_CHILD);
  };
  goog.inherits(lf.proc.SkipStep, lf.proc.PhysicalQueryPlanNode);
  
  
  /** @override */
  lf.proc.SkipStep.prototype.toString = function() {
    return 'skip(?)';
  };
  
  
  /** @override */
  lf.proc.SkipStep.prototype.toContextString = function(context) {
    return this.toString().replace('?', context.skip.toString());
  };
  
  
  /** @override */
  lf.proc.SkipStep.prototype.execInternal = function(
      journal, relations, context) {
    return [new lf.proc.Relation(
        relations[0].entries.slice(context.skip), relations[0].getTables())];
  };
  