/**
* 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.drill.exec.store.jdbc;
import java.util.List;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.physical.PhysicalOperatorSetupException;
import org.apache.drill.exec.physical.base.AbstractGroupScan;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.physical.base.ScanStats;
import org.apache.drill.exec.physical.base.ScanStats.GroupScanProperty;
import org.apache.drill.exec.physical.base.SubScan;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
import org.apache.drill.exec.store.StoragePluginRegistry;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
@JsonTypeName("jdbc-scan")
public class JdbcGroupScan extends AbstractGroupScan {
private final String sql;
private final JdbcStoragePlugin plugin;
private final double rows;
@JsonCreator
public JdbcGroupScan(
@JsonProperty("sql") String sql,
@JsonProperty("config") StoragePluginConfig config,
@JsonProperty("rows") double rows,
@JacksonInject StoragePluginRegistry plugins) throws ExecutionSetupException {
super("");
this.sql = sql;
this.plugin = (JdbcStoragePlugin) plugins.getPlugin(config);
this.rows = rows;
}
JdbcGroupScan(String sql, JdbcStoragePlugin plugin, double rows) {
super("");
this.sql = sql;
this.plugin = plugin;
this.rows = rows;
}
@Override
public void applyAssignments(List<DrillbitEndpoint> endpoints) throws PhysicalOperatorSetupException {
}
@Override
public SubScan getSpecificScan(int minorFragmentId) throws ExecutionSetupException {
return new JdbcSubScan(sql, plugin);
}
@Override
public int getMaxParallelizationWidth() {
return 1;
}
@Override
public ScanStats getScanStats() {
return new ScanStats(
GroupScanProperty.NO_EXACT_ROW_COUNT,
(long) Math.max(rows, 1),
1,
1);
}
public String getSql() {
return sql;
}
@Override
public String getDigest() {
return sql + String.valueOf(plugin.getConfig());
}
public StoragePluginConfig getConfig() {
return plugin.getConfig();
}
@Override
public PhysicalOperator getNewWithChildren(List<PhysicalOperator> children) throws ExecutionSetupException {
return new JdbcGroupScan(sql, plugin, rows);
}
}