org.apache.hadoop.hive.ql.io.sarg.SearchArgumentFactory Maven / Gradle / Ivy
/**
* 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.io.sarg;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.serde2.ColumnProjectionUtils;
import org.apache.hadoop.hive.ql.io.sarg.SearchArgument;
import org.apache.hadoop.hive.ql.io.sarg.SearchArgument.Builder;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
import org.apache.hadoop.hive.ql.plan.TableScanDesc;
/**
* A factory for creating SearchArguments.
*/
public class SearchArgumentFactory {
public static final String SARG_PUSHDOWN = "sarg.pushdown";
public static SearchArgument create(ExprNodeGenericFuncDesc expression) {
return new SearchArgumentImpl(expression);
}
public static Builder newBuilder() {
return SearchArgumentImpl.newBuilder();
}
public static SearchArgument create(String kryo) {
return SearchArgumentImpl.fromKryo(kryo);
}
public static SearchArgument createFromConf(Configuration conf) {
String sargString = null;
if ((sargString = conf.get(TableScanDesc.FILTER_EXPR_CONF_STR)) != null) {
return create(Utilities.deserializeExpression(sargString));
} else if ((sargString = conf.get(SARG_PUSHDOWN)) != null) {
return create(sargString);
}
return null;
}
}