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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.hive.service.cli.operation;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.IMetaStoreClient;
import org.apache.hadoop.hive.metastore.api.TableMeta;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObject;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObjectUtils;
import org.apache.hive.service.cli.FetchOrientation;
import org.apache.hive.service.cli.HiveSQLException;
import org.apache.hive.service.cli.OperationState;
import org.apache.hive.service.cli.OperationType;
import org.apache.hive.service.cli.RowSet;
import org.apache.hive.service.cli.RowSetFactory;
import org.apache.hive.service.cli.TableSchema;
import org.apache.hive.service.cli.session.HiveSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* GetTablesOperation.
*
*/
public class GetTablesOperation extends MetadataOperation {
private static final Logger LOG = LoggerFactory.getLogger(GetTablesOperation.class.getName());
private final String catalogName;
private final String schemaName;
private final String tableName;
private final List tableTypeList;
private final RowSet rowSet;
private final TableTypeMapping tableTypeMapping;
private static final TableSchema RESULT_SET_SCHEMA = new TableSchema()
.addStringColumn("TABLE_CAT", "Catalog name. NULL if not applicable.")
.addStringColumn("TABLE_SCHEM", "Schema name.")
.addStringColumn("TABLE_NAME", "Table name.")
.addStringColumn("TABLE_TYPE", "The table type, e.g. \"TABLE\", \"VIEW\", etc.")
.addStringColumn("REMARKS", "Comments about the table.")
.addStringColumn("TYPE_CAT", "The types catalog.")
.addStringColumn("TYPE_SCHEM", "The types schema.")
.addStringColumn("TYPE_NAME", "Type name.")
.addStringColumn("SELF_REFERENCING_COL_NAME",
"Name of the designated \"identifier\" column of a typed table.")
.addStringColumn("REF_GENERATION",
"Specifies how values in SELF_REFERENCING_COL_NAME are created.");
protected GetTablesOperation(HiveSession parentSession,
String catalogName, String schemaName, String tableName,
List tableTypes) {
super(parentSession, OperationType.GET_TABLES);
this.catalogName = catalogName;
this.schemaName = schemaName;
this.tableName = tableName;
String tableMappingStr = getParentSession().getHiveConf().
getVar(HiveConf.ConfVars.HIVE_SERVER2_TABLE_TYPE_MAPPING);
tableTypeMapping =
TableTypeMappingFactory.getTableTypeMapping(tableMappingStr);
if (tableTypes != null) {
tableTypeList = new ArrayList();
for (String tableType : tableTypes) {
tableTypeList.addAll(Arrays.asList(tableTypeMapping.mapToHiveType(tableType.trim())));
}
} else {
tableTypeList = null;
}
this.rowSet = RowSetFactory.create(RESULT_SET_SCHEMA, getProtocolVersion(), false);
LOG.info("Starting GetTablesOperation with the following parameters: "
+ "catalogName={}, schemaName={}, tableName={}, tableTypes={}",
catalogName, schemaName, tableName,
tableTypeList != null ? tableTypeList.toString() : "null");
}
@Override
public void runInternal() throws HiveSQLException {
setState(OperationState.RUNNING);
LOG.info("Fetching table metadata");
try {
IMetaStoreClient metastoreClient = getParentSession().getMetaStoreClient();
String schemaPattern = convertSchemaPattern(schemaName);
List matchingDbs = metastoreClient.getDatabases(schemaPattern);
if(isAuthV2Enabled()){
List privObjs = HivePrivilegeObjectUtils.getHivePrivDbObjects(matchingDbs);
String cmdStr = "catalog : " + catalogName + ", schemaPattern : " + schemaName;
authorizeMetaGets(HiveOperationType.GET_TABLES, privObjs, cmdStr);
}
String tablePattern = convertIdentifierPattern(tableName, true);
for (String dbName : metastoreClient.getDatabases(schemaPattern)) {
for (TableMeta tableMeta :
metastoreClient.getTableMeta(dbName, tablePattern, tableTypeList)) {
String tableType = tableTypeMapping.mapToClientType(tableMeta.getTableType());
rowSet.addRow(new Object[]{
DEFAULT_HIVE_CATALOG,
tableMeta.getDbName(),
tableMeta.getTableName(),
tableType,
tableMeta.getComments(),
null, null, null, null, null
});
if (LOG.isDebugEnabled()) {
String debugMessage = getDebugMessage("table", RESULT_SET_SCHEMA);
LOG.debug(debugMessage, DEFAULT_HIVE_CATALOG, tableMeta.getDbName(),
tableMeta.getTableName(), tableType, tableMeta.getComments());
}
}
if (LOG.isDebugEnabled() && rowSet.numRows() == 0) {
LOG.debug("No table metadata has been returned.");
}
}
setState(OperationState.FINISHED);
LOG.info("Fetching table metadata has been successfully finished");
} catch (Exception e) {
setState(OperationState.ERROR);
throw new HiveSQLException(e);
}
}
/* (non-Javadoc)
* @see org.apache.hive.service.cli.Operation#getResultSetSchema()
*/
@Override
public TableSchema getResultSetSchema() throws HiveSQLException {
assertState(Collections.singleton(OperationState.FINISHED));
return RESULT_SET_SCHEMA;
}
/* (non-Javadoc)
* @see org.apache.hive.service.cli.Operation#getNextRowSet(org.apache.hive.service.cli.FetchOrientation, long)
*/
@Override
public RowSet getNextRowSet(FetchOrientation orientation, long maxRows) throws HiveSQLException {
assertState(Collections.singleton(OperationState.FINISHED));
validateDefaultFetchOrientation(orientation);
if (orientation.equals(FetchOrientation.FETCH_FIRST)) {
rowSet.setStartOffset(0);
}
return rowSet.extractSubset((int)maxRows);
}
}
