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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.hadoop.hive.ql.index;

import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;

/**
 * IndexSearchCondition represents an individual search condition
 * found by {@link IndexPredicateAnalyzer}.
 *
 */
public class IndexSearchCondition
{
  private ExprNodeColumnDesc columnDesc;
  private String comparisonOp;
  private ExprNodeConstantDesc constantDesc;
  private ExprNodeGenericFuncDesc comparisonExpr;

  private String[] fields;

  public IndexSearchCondition(
      ExprNodeColumnDesc columnDesc,
      String comparisonOp,
      ExprNodeConstantDesc constantDesc,
      ExprNodeGenericFuncDesc comparisonExpr) {
    this(columnDesc, comparisonOp, constantDesc, comparisonExpr, null);
  }

  /**
   * Constructs a search condition, which takes the form
   * 
column-ref comparison-op constant-value
. * * @param columnDesc column being compared * * @param comparisonOp comparison operator, e.g. "=" * (taken from GenericUDFBridge.getUdfName()) * * @param constantDesc constant value to search for * * @param comparisonExpr the original comparison expression */ public IndexSearchCondition( ExprNodeColumnDesc columnDesc, String comparisonOp, ExprNodeConstantDesc constantDesc, ExprNodeGenericFuncDesc comparisonExpr, String[] fields) { this.columnDesc = columnDesc; this.comparisonOp = comparisonOp; this.constantDesc = constantDesc; this.comparisonExpr = comparisonExpr; this.fields = fields; } public void setColumnDesc(ExprNodeColumnDesc columnDesc) { this.columnDesc = columnDesc; } public ExprNodeColumnDesc getColumnDesc() { return columnDesc; } public void setComparisonOp(String comparisonOp) { this.comparisonOp = comparisonOp; } public String getComparisonOp() { return comparisonOp; } public void setConstantDesc(ExprNodeConstantDesc constantDesc) { this.constantDesc = constantDesc; } public ExprNodeConstantDesc getConstantDesc() { return constantDesc; } public void setComparisonExpr(ExprNodeGenericFuncDesc comparisonExpr) { this.comparisonExpr = comparisonExpr; } public ExprNodeGenericFuncDesc getComparisonExpr() { return comparisonExpr; } public String[] getFields() { return fields; } @Override public String toString() { return comparisonExpr.getExprString(); } }




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