org.apache.hadoop.hive.ql.parse.repl.load.message.RenamePartitionHandler Maven / Gradle / Ivy
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package org.apache.hadoop.hive.ql.parse.repl.load.message;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.metastore.api.Table;
import org.apache.hadoop.hive.metastore.messaging.AlterPartitionMessage;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.TaskFactory;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import org.apache.hadoop.hive.ql.plan.DDLWork;
import org.apache.hadoop.hive.ql.plan.RenamePartitionDesc;
import java.io.Serializable;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class RenamePartitionHandler extends AbstractMessageHandler {
@Override
public List> handle(Context context)
throws SemanticException {
AlterPartitionMessage msg = deserializer.getAlterPartitionMessage(context.dmd.getPayload());
String actualDbName = context.isDbNameEmpty() ? msg.getDB() : context.dbName;
String actualTblName = context.isTableNameEmpty() ? msg.getTable() : context.tableName;
Map newPartSpec = new LinkedHashMap<>();
Map oldPartSpec = new LinkedHashMap<>();
String tableName = actualDbName + "." + actualTblName;
try {
Table tblObj = msg.getTableObj();
Iterator beforeIterator = msg.getPtnObjBefore().getValuesIterator();
Iterator afterIterator = msg.getPtnObjAfter().getValuesIterator();
for (FieldSchema fs : tblObj.getPartitionKeys()) {
oldPartSpec.put(fs.getName(), beforeIterator.next());
newPartSpec.put(fs.getName(), afterIterator.next());
}
} catch (Exception e) {
throw (e instanceof SemanticException)
? (SemanticException) e
: new SemanticException("Error reading message members", e);
}
RenamePartitionDesc renamePtnDesc = new RenamePartitionDesc(
tableName, oldPartSpec, newPartSpec, context.eventOnlyReplicationSpec());
Task renamePtnTask = TaskFactory.get(
new DDLWork(readEntitySet, writeEntitySet, renamePtnDesc), context.hiveConf);
context.log.debug("Added rename ptn task : {}:{}->{}",
renamePtnTask.getId(), oldPartSpec, newPartSpec);
updatedMetadata.set(context.dmd.getEventTo().toString(), actualDbName, actualTblName, newPartSpec);
return Collections.singletonList(renamePtnTask);
}
}