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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.metastore;
+
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hive.common.ValidTxnList;
+import org.apache.hadoop.hive.common.ValidWriteIdList;
+import org.apache.hadoop.hive.common.classification.RetrySemantics;
+import org.apache.hadoop.hive.metastore.annotation.NoReconnect;
+import org.apache.hadoop.hive.metastore.api.AggrStats;
+import org.apache.hadoop.hive.metastore.api.AlreadyExistsException;
+import org.apache.hadoop.hive.metastore.api.CheckConstraintsRequest;
+import org.apache.hadoop.hive.metastore.api.Catalog;
+import org.apache.hadoop.hive.metastore.api.CmRecycleRequest;
+import org.apache.hadoop.hive.metastore.api.CmRecycleResponse;
+import org.apache.hadoop.hive.metastore.api.ColumnStatistics;
+import org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj;
+import org.apache.hadoop.hive.metastore.api.CommitTxnRequest;
+import org.apache.hadoop.hive.metastore.api.CompactionResponse;
+import org.apache.hadoop.hive.metastore.api.CompactionType;
+import org.apache.hadoop.hive.metastore.api.ConfigValSecurityException;
+import org.apache.hadoop.hive.metastore.api.CreationMetadata;
+import org.apache.hadoop.hive.metastore.api.CurrentNotificationEventId;
+import org.apache.hadoop.hive.metastore.api.DataOperationType;
+import org.apache.hadoop.hive.metastore.api.DefaultConstraintsRequest;
+import org.apache.hadoop.hive.metastore.api.Database;
+import org.apache.hadoop.hive.metastore.api.EnvironmentContext;
+import org.apache.hadoop.hive.metastore.api.FieldSchema;
+import org.apache.hadoop.hive.metastore.api.FindSchemasByColsResp;
+import org.apache.hadoop.hive.metastore.api.FindSchemasByColsRqst;
+import org.apache.hadoop.hive.metastore.api.FireEventRequest;
+import org.apache.hadoop.hive.metastore.api.FireEventResponse;
+import org.apache.hadoop.hive.metastore.api.ForeignKeysRequest;
+import org.apache.hadoop.hive.metastore.api.Function;
+import org.apache.hadoop.hive.metastore.api.GetAllFunctionsResponse;
+import org.apache.hadoop.hive.metastore.api.GetOpenTxnsInfoResponse;
+import org.apache.hadoop.hive.metastore.api.GetPrincipalsInRoleRequest;
+import org.apache.hadoop.hive.metastore.api.GetPrincipalsInRoleResponse;
+import org.apache.hadoop.hive.metastore.api.GetRoleGrantsForPrincipalRequest;
+import org.apache.hadoop.hive.metastore.api.GetRoleGrantsForPrincipalResponse;
+import org.apache.hadoop.hive.metastore.api.HeartbeatTxnRangeResponse;
+import org.apache.hadoop.hive.metastore.api.HiveObjectPrivilege;
+import org.apache.hadoop.hive.metastore.api.HiveObjectRef;
+import org.apache.hadoop.hive.metastore.api.ISchema;
+import org.apache.hadoop.hive.metastore.api.InvalidInputException;
+import org.apache.hadoop.hive.metastore.api.InvalidObjectException;
+import org.apache.hadoop.hive.metastore.api.InvalidOperationException;
+import org.apache.hadoop.hive.metastore.api.InvalidPartitionException;
+import org.apache.hadoop.hive.metastore.api.LockRequest;
+import org.apache.hadoop.hive.metastore.api.LockResponse;
+import org.apache.hadoop.hive.metastore.api.Materialization;
+import org.apache.hadoop.hive.metastore.api.MetaException;
+import org.apache.hadoop.hive.metastore.api.MetadataPpdResult;
+import org.apache.hadoop.hive.metastore.api.NoSuchLockException;
+import org.apache.hadoop.hive.metastore.api.NoSuchObjectException;
+import org.apache.hadoop.hive.metastore.api.NoSuchTxnException;
+import org.apache.hadoop.hive.metastore.api.NotNullConstraintsRequest;
+import org.apache.hadoop.hive.metastore.api.NotificationEvent;
+import org.apache.hadoop.hive.metastore.api.NotificationEventResponse;
+import org.apache.hadoop.hive.metastore.api.NotificationEventsCountRequest;
+import org.apache.hadoop.hive.metastore.api.NotificationEventsCountResponse;
+import org.apache.hadoop.hive.metastore.api.OpenTxnsResponse;
+import org.apache.hadoop.hive.metastore.api.Partition;
+import org.apache.hadoop.hive.metastore.api.PartitionEventType;
+import org.apache.hadoop.hive.metastore.api.PartitionValuesRequest;
+import org.apache.hadoop.hive.metastore.api.PartitionValuesResponse;
+import org.apache.hadoop.hive.metastore.api.PrimaryKeysRequest;
+import org.apache.hadoop.hive.metastore.api.PrincipalPrivilegeSet;
+import org.apache.hadoop.hive.metastore.api.PrincipalType;
+import org.apache.hadoop.hive.metastore.api.PrivilegeBag;
+import org.apache.hadoop.hive.metastore.api.Role;
+import org.apache.hadoop.hive.metastore.api.RuntimeStat;
+import org.apache.hadoop.hive.metastore.api.SQLCheckConstraint;
+import org.apache.hadoop.hive.metastore.api.SQLDefaultConstraint;
+import org.apache.hadoop.hive.metastore.api.SQLForeignKey;
+import org.apache.hadoop.hive.metastore.api.SQLNotNullConstraint;
+import org.apache.hadoop.hive.metastore.api.SQLPrimaryKey;
+import org.apache.hadoop.hive.metastore.api.SQLUniqueConstraint;
+import org.apache.hadoop.hive.metastore.api.SchemaVersion;
+import org.apache.hadoop.hive.metastore.api.SchemaVersionState;
+import org.apache.hadoop.hive.metastore.api.SerDeInfo;
+import org.apache.hadoop.hive.metastore.api.SetPartitionsStatsRequest;
+import org.apache.hadoop.hive.metastore.api.ShowCompactResponse;
+import org.apache.hadoop.hive.metastore.api.ShowLocksRequest;
+import org.apache.hadoop.hive.metastore.api.ShowLocksResponse;
+import org.apache.hadoop.hive.metastore.api.Table;
+import org.apache.hadoop.hive.metastore.api.TableMeta;
+import org.apache.hadoop.hive.metastore.api.TableValidWriteIds;
+import org.apache.hadoop.hive.metastore.api.TxnAbortedException;
+import org.apache.hadoop.hive.metastore.api.TxnOpenException;
+import org.apache.hadoop.hive.metastore.api.TxnToWriteId;
+import org.apache.hadoop.hive.metastore.api.UniqueConstraintsRequest;
+import org.apache.hadoop.hive.metastore.api.UnknownDBException;
+import org.apache.hadoop.hive.metastore.api.UnknownPartitionException;
+import org.apache.hadoop.hive.metastore.api.UnknownTableException;
+import org.apache.hadoop.hive.metastore.api.WMFullResourcePlan;
+import org.apache.hadoop.hive.metastore.api.WMMapping;
+import org.apache.hadoop.hive.metastore.api.WMNullablePool;
+import org.apache.hadoop.hive.metastore.api.WMNullableResourcePlan;
+import org.apache.hadoop.hive.metastore.api.WMPool;
+import org.apache.hadoop.hive.metastore.api.WMResourcePlan;
+import org.apache.hadoop.hive.metastore.api.WMTrigger;
+import org.apache.hadoop.hive.metastore.api.WMValidateResourcePlanResponse;
+import org.apache.hadoop.hive.metastore.api.WriteNotificationLogRequest;
+import org.apache.hadoop.hive.metastore.partition.spec.PartitionSpecProxy;
+import org.apache.hadoop.hive.metastore.utils.ObjectPair;
+import org.apache.thrift.TException;
+
+/**
+ * Wrapper around hive metastore thrift api
+ */
[email protected]
[email protected]
+public interface IMetaStoreClient {
+
+  /**
+   * Returns whether current client is compatible with conf argument or not
+   * @return
+   */
+  boolean isCompatibleWith(Configuration conf);
+
+  /**
+   * Set added jars path info to MetaStoreClient.
+   * @param addedJars the hive.added.jars.path. It is qualified paths 
separated by commas.
+   */
+  void setHiveAddedJars(String addedJars);
+
+  /**
+   * Returns true if the current client is using an in process metastore 
(local metastore).
+   *
+   * @return
+   */
+  boolean isLocalMetaStore();
+
+  /**
+   *  Tries to reconnect this MetaStoreClient to the MetaStore.
+   */
+  void reconnect() throws MetaException;
+
+  /**
+   * close connection to meta store
+   */
+  @NoReconnect
+  void close();
+
+  /**
+   * set meta variable which is open to end users
+   */
+  void setMetaConf(String key, String value) throws MetaException, TException;
+
+  /**
+   * get current meta variable
+   */
+  String getMetaConf(String key) throws MetaException, TException;
+
+  /**
+   * Create a new catalog.
+   * @param catalog catalog object to create.
+   * @throws AlreadyExistsException A catalog of this name already exists.
+   * @throws InvalidObjectException There is something wrong with the passed 
in catalog object.
+   * @throws MetaException something went wrong, usually either in the 
database or trying to
+   * create the directory for the catalog.
+   * @throws TException general thrift exception.
+   */
+  void createCatalog(Catalog catalog)
+      throws AlreadyExistsException, InvalidObjectException, MetaException, 
TException;
+
+  /**
+   * Alter an existing catalog.
+   * @param catalogName the name of the catalog to alter.
+   * @param newCatalog the new catalog object.  All relevant details of the 
catalog should be
+   *                   set, don't rely on the system to figure out what you 
changed and only copy
+   *                   that in.
+   * @throws NoSuchObjectException no catalog of this name exists
+   * @throws InvalidObjectException an attempt was made to make an unsupported 
change (such as
+   * catalog name).
+   * @throws MetaException usually indicates a database error
+   * @throws TException general thrift exception
+   */
+  void alterCatalog(String catalogName, Catalog newCatalog)
+      throws NoSuchObjectException, InvalidObjectException, MetaException, 
TException;
+
+  /**
+   * Get a catalog object.
+   * @param catName Name of the catalog to fetch.
+   * @return The catalog.
+   * @throws NoSuchObjectException no catalog of this name exists.
+   * @throws MetaException something went wrong, usually in the database.
+   * @throws TException general thrift exception.
+   */
+  Catalog getCatalog(String catName) throws NoSuchObjectException, 
MetaException, TException;
+
+  /**
+   * Get a list of all catalogs known to the system.
+   * @return list of catalog names
+   * @throws MetaException something went wrong, usually in the database.
+   * @throws TException general thrift exception.
+   */
+  List<String> getCatalogs() throws MetaException, TException;
+
+  /**
+   * Drop a catalog.  Catalogs must be empty to be dropped, there is no 
cascade for dropping a
+   * catalog.
+   * @param catName name of the catalog to drop
+   * @throws NoSuchObjectException no catalog of this name exists.
+   * @throws InvalidOperationException The catalog is not empty and cannot be 
dropped.
+   * @throws MetaException something went wrong, usually in the database.
+   * @throws TException general thrift exception.
+   */
+  void dropCatalog(String catName)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException;
+
+  /**
+   * Get the names of all databases in the default catalog that match the 
given pattern.
+   * @param databasePattern pattern for the database name to patch
+   * @return List of database names.
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> getDatabases(String databasePattern) throws MetaException, 
TException;
+
+  /**
+   * Get all databases in a catalog whose names match a pattern.
+   * @param catName  catalog name.  Can be null, in which case the default 
catalog is assumed.
+   * @param databasePattern pattern for the database name to match
+   * @return list of database names
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> getDatabases(String catName, String databasePattern)
+      throws MetaException, TException;
+
+  /**
+   * Get the names of all databases in the MetaStore.
+   * @return List of database names in the default catalog.
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> getAllDatabases() throws MetaException, TException;
+
+  /**
+   * Get all databases in a catalog.
+   * @param catName catalog name.  Can be null, in which case the default 
catalog is assumed.
+   * @return list of all database names
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> getAllDatabases(String catName) throws MetaException, 
TException;
+
+  /**
+   * Get the names of all tables in the specified database that satisfy the 
supplied
+   * table name pattern.
+   * @param dbName database name.
+   * @param tablePattern pattern for table name to conform to
+   * @return List of table names.
+   * @throws MetaException error fetching information from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException indicated database to search in does not exist.
+   */
+  List<String> getTables(String dbName, String tablePattern)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get the names of all tables in the specified database that satisfy the 
supplied
+   * table name pattern.
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tablePattern pattern for table name to conform to
+   * @return List of table names.
+   * @throws MetaException error fetching information from the RDBMS
+   * @throws TException general thrift error
+   * @throws UnknownDBException indicated database to search in does not exist.
+   */
+  List<String> getTables(String catName, String dbName, String tablePattern)
+      throws MetaException, TException, UnknownDBException;
+
+
+  /**
+   * Get the names of all tables in the specified database that satisfy the 
supplied
+   * table name pattern and table type (MANAGED_TABLE || EXTERNAL_TABLE || 
VIRTUAL_VIEW)
+   * @param dbName Name of the database to fetch tables in.
+   * @param tablePattern pattern to match for table names.
+   * @param tableType Type of the table in the HMS store. VIRTUAL_VIEW is for 
views.
+   * @return List of table names.
+   * @throws MetaException error fetching information from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException indicated database does not exist.
+   */
+  List<String> getTables(String dbName, String tablePattern, TableType 
tableType)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get the names of all tables in the specified database that satisfy the 
supplied
+   * table name pattern and table type (MANAGED_TABLE || EXTERNAL_TABLE || 
VIRTUAL_VIEW)
+   * @param catName catalog name.
+   * @param dbName Name of the database to fetch tables in.
+   * @param tablePattern pattern to match for table names.
+   * @param tableType Type of the table in the HMS store. VIRTUAL_VIEW is for 
views.
+   * @return List of table names.
+   * @throws MetaException error fetching information from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException indicated database does not exist.
+   */
+  List<String> getTables(String catName, String dbName, String tablePattern, 
TableType tableType)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get materialized views that have rewriting enabled.  This will use the 
default catalog.
+   * @param dbName Name of the database to fetch materialized views from.
+   * @return List of materialized view names.
+   * @throws MetaException error fetching from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException no such database
+   */
+  List<String> getMaterializedViewsForRewriting(String dbName)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get materialized views that have rewriting enabled.
+   * @param catName catalog name.
+   * @param dbName Name of the database to fetch materialized views from.
+   * @return List of materialized view names.
+   * @throws MetaException error fetching from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException no such database
+   */
+  List<String> getMaterializedViewsForRewriting(String catName, String dbName)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Fetches just table name and comments.  Useful when you need full table 
name
+   * (catalog.database.table) but don't need extra information like partition 
columns that
+   * require additional fetches from the database.
+   * @param dbPatterns database pattern to match, or null for all databases
+   * @param tablePatterns table pattern to match.
+   * @param tableTypes list of table types to fetch.
+   * @return list of TableMeta objects with information on matching tables
+   * @throws MetaException something went wrong with the fetch from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException No databases match the provided pattern.
+   */
+  List<TableMeta> getTableMeta(String dbPatterns, String tablePatterns, 
List<String> tableTypes)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Fetches just table name and comments.  Useful when you need full table 
name
+   * (catalog.database.table) but don't need extra information like partition 
columns that
+   * require additional fetches from the database.
+   * @param catName catalog to search in.  Search cannot cross catalogs.
+   * @param dbPatterns database pattern to match, or null for all databases
+   * @param tablePatterns table pattern to match.
+   * @param tableTypes list of table types to fetch.
+   * @return list of TableMeta objects with information on matching tables
+   * @throws MetaException something went wrong with the fetch from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException No databases match the provided pattern.
+   */
+  List<TableMeta> getTableMeta(String catName, String dbPatterns, String 
tablePatterns,
+                               List<String> tableTypes)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get the names of all tables in the specified database.
+   * @param dbName database name
+   * @return List of table names.
+   * @throws MetaException something went wrong with the fetch from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException No databases match the provided pattern.
+   */
+  List<String> getAllTables(String dbName) throws MetaException, TException, 
UnknownDBException;
+
+  /**
+   * Get the names of all tables in the specified database.
+   * @param catName catalog name
+   * @param dbName database name
+   * @return List of table names.
+   * @throws MetaException something went wrong with the fetch from the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException No databases match the provided pattern.
+   */
+  List<String> getAllTables(String catName, String dbName)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get a list of table names that match a filter.
+   * The filter operators are LIKE, &lt;, &lt;=, &gt;, &gt;=, =, &lt;&gt;
+   *
+   * In the filter statement, values interpreted as strings must be enclosed 
in quotes,
+   * while values interpreted as integers should not be.  Strings and integers 
are the only
+   * supported value types.
+   *
+   * The currently supported key names in the filter are:
+   * Constants.HIVE_FILTER_FIELD_OWNER, which filters on the tables' owner's 
name
+   *   and supports all filter operators
+   * Constants.HIVE_FILTER_FIELD_LAST_ACCESS, which filters on the last access 
times
+   *   and supports all filter operators except LIKE
+   * Constants.HIVE_FILTER_FIELD_PARAMS, which filters on the tables' 
parameter keys and values
+   *   and only supports the filter operators = and &lt;&gt;.
+   *   Append the parameter key name to HIVE_FILTER_FIELD_PARAMS in the filter 
statement.
+   *   For example, to filter on parameter keys called "retention", the key 
name in the filter
+   *   statement should be Constants.HIVE_FILTER_FIELD_PARAMS + "retention"
+   *   Also, = and &lt;&gt; only work for keys that exist in the tables.
+   *   E.g., filtering on tables where key1 &lt;&gt; value will only
+   *   return tables that have a value for the parameter key1.
+   * Some example filter statements include:
+   * filter = Constants.HIVE_FILTER_FIELD_OWNER + " like \".*test.*\" and " +
+   *   Constants.HIVE_FILTER_FIELD_LAST_ACCESS + " = 0";
+   * filter = Constants.HIVE_FILTER_FIELD_OWNER + " = \"test_user\" and (" +
+   *   Constants.HIVE_FILTER_FIELD_PARAMS + "retention = \"30\" or " +
+   *   Constants.HIVE_FILTER_FIELD_PARAMS + "retention = \"90\")"
+   *
+   * @param dbName
+   *          The name of the database from which you will retrieve the table 
names
+   * @param filter
+   *          The filter string
+   * @param maxTables
+   *          The maximum number of tables returned
+   * @return  A list of table names that match the desired filter
+   * @throws InvalidOperationException invalid filter
+   * @throws UnknownDBException no such database
+   * @throws TException thrift transport error
+   */
+  List<String> listTableNamesByFilter(String dbName, String filter, short 
maxTables)
+      throws TException, InvalidOperationException, UnknownDBException;
+
+  /**
+   * Get a list of table names that match a filter.
+   * The filter operators are LIKE, &lt;, &lt;=, &gt;, &gt;=, =, &lt;&gt;
+   *
+   * In the filter statement, values interpreted as strings must be enclosed 
in quotes,
+   * while values interpreted as integers should not be.  Strings and integers 
are the only
+   * supported value types.
+   *
+   * The currently supported key names in the filter are:
+   * Constants.HIVE_FILTER_FIELD_OWNER, which filters on the tables' owner's 
name
+   *   and supports all filter operators
+   * Constants.HIVE_FILTER_FIELD_LAST_ACCESS, which filters on the last access 
times
+   *   and supports all filter operators except LIKE
+   * Constants.HIVE_FILTER_FIELD_PARAMS, which filters on the tables' 
parameter keys and values
+   *   and only supports the filter operators = and &lt;&gt;.
+   *   Append the parameter key name to HIVE_FILTER_FIELD_PARAMS in the filter 
statement.
+   *   For example, to filter on parameter keys called "retention", the key 
name in the filter
+   *   statement should be Constants.HIVE_FILTER_FIELD_PARAMS + "retention"
+   *   Also, = and &lt;&gt; only work for keys that exist in the tables.
+   *   E.g., filtering on tables where key1 &lt;&gt; value will only
+   *   return tables that have a value for the parameter key1.
+   * Some example filter statements include:
+   * filter = Constants.HIVE_FILTER_FIELD_OWNER + " like \".*test.*\" and " +
+   *   Constants.HIVE_FILTER_FIELD_LAST_ACCESS + " = 0";
+   * filter = Constants.HIVE_FILTER_FIELD_OWNER + " = \"test_user\" and (" +
+   *   Constants.HIVE_FILTER_FIELD_PARAMS + "retention = \"30\" or " +
+   *   Constants.HIVE_FILTER_FIELD_PARAMS + "retention = \"90\")"
+   *
+   * @param catName catalog name
+   * @param dbName
+   *          The name of the database from which you will retrieve the table 
names
+   * @param filter
+   *          The filter string
+   * @param maxTables
+   *          The maximum number of tables returned
+   * @return  A list of table names that match the desired filter
+   * @throws InvalidOperationException invalid filter
+   * @throws UnknownDBException no such database
+   * @throws TException thrift transport error
+   */
+  List<String> listTableNamesByFilter(String catName, String dbName, String 
filter, int maxTables)
+      throws TException, InvalidOperationException, UnknownDBException;
+
+  /**
+   * Drop the table.
+   *
+   * @param dbname
+   *          The database for this table
+   * @param tableName
+   *          The table to drop
+   * @param deleteData
+   *          Should we delete the underlying data
+   * @param ignoreUnknownTab
+   *          don't throw if the requested table doesn't exist
+   * @throws MetaException
+   *           Could not drop table properly.
+   * @throws NoSuchObjectException
+   *           The table wasn't found.
+   * @throws TException
+   *           A thrift communication error occurred
+   *
+   */
+  void dropTable(String dbname, String tableName, boolean deleteData,
+      boolean ignoreUnknownTab) throws MetaException, TException,
+      NoSuchObjectException;
+
+  /**
+   * Drop the table.
+   *
+   * @param dbname
+   *          The database for this table
+   * @param tableName
+   *          The table to drop
+   * @param deleteData
+   *          Should we delete the underlying data
+   * @param ignoreUnknownTab
+   *          don't throw if the requested table doesn't exist
+   * @param ifPurge
+   *          completely purge the table (skipping trash) while removing data 
from warehouse
+   * @throws MetaException
+   *           Could not drop table properly.
+   * @throws NoSuchObjectException
+   *           The table wasn't found.
+   * @throws TException
+   *           A thrift communication error occurred
+   */
+  @Deprecated // TODO: deprecate all methods without a catalog here; a single 
layer (e.g. Hive.java) should handle current-catalog
+  void dropTable(String dbname, String tableName, boolean deleteData,
+      boolean ignoreUnknownTab, boolean ifPurge) throws MetaException, 
TException,
+      NoSuchObjectException;
+
+  /**
+   * Drop the table.
+   *
+   * @param dbname
+   *          The database for this table
+   * @param tableName
+   *          The table to drop
+   * @throws MetaException
+   *           Could not drop table properly.
+   * @throws NoSuchObjectException
+   *           The table wasn't found.
+   * @throws TException
+   *           A thrift communication error occurred
+   */
+  void dropTable(String dbname, String tableName)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Drop a table.
+   * @param catName catalog the table is in.
+   * @param dbName database the table is in.
+   * @param tableName table name.
+   * @param deleteData whether associated data should be deleted.
+   * @param ignoreUnknownTable whether a non-existent table name should be 
ignored
+   * @param ifPurge whether dropped data should be immediately removed rather 
than placed in HDFS
+   *               trash.
+   * @throws MetaException something went wrong, usually in the RDBMS or 
storage.
+   * @throws NoSuchObjectException No table of this name exists, only thrown if
+   * ignoreUnknownTable is false.
+   * @throws TException general thrift error.
+   */
+  void dropTable(String catName, String dbName, String tableName, boolean 
deleteData,
+                 boolean ignoreUnknownTable, boolean ifPurge)
+    throws MetaException, NoSuchObjectException, TException;
+
+  /**
+   * Drop a table.  Equivalent to
+   * {@link #dropTable(String, String, String, boolean, boolean, boolean)} 
with ifPurge set to
+   * false.
+   * @param catName catalog the table is in.
+   * @param dbName database the table is in.
+   * @param tableName table name.
+   * @param deleteData whether associated data should be deleted.
+   * @param ignoreUnknownTable whether a non-existent table name should be 
ignored
+   * @throws MetaException something went wrong, usually in the RDBMS or 
storage.
+   * @throws NoSuchObjectException No table of this name exists, only thrown if
+   * ignoreUnknownTable is false.
+   * @throws TException general thrift error.
+   */
+  default void dropTable(String catName, String dbName, String tableName, 
boolean deleteData,
+                         boolean ignoreUnknownTable)
+    throws MetaException, NoSuchObjectException, TException {
+    dropTable(catName, dbName, tableName, deleteData, ignoreUnknownTable, 
false);
+  }
+
+  /**
+   * Drop a table.  Equivalent to
+   * {@link #dropTable(String, String, String, boolean, boolean, boolean)} 
with deleteData
+   * set and ignoreUnknownTable set to true and ifPurge set to false.
+   * @param catName catalog the table is in.
+   * @param dbName database the table is in.
+   * @param tableName table name.
+   * @throws MetaException something went wrong, usually in the RDBMS or 
storage.
+   * @throws NoSuchObjectException No table of this name exists, only thrown if
+   * ignoreUnknownTable is false.
+   * @throws TException general thrift error.
+   */
+  default void dropTable(String catName, String dbName, String tableName)
+      throws MetaException, NoSuchObjectException, TException {
+    dropTable(catName, dbName, tableName, true, true, false);
+  }
+
+  /**
+   * Truncate the table/partitions in the DEFAULT database.
+   * @param dbName
+   *          The db to which the table to be truncate belongs to
+   * @param tableName
+   *          The table to truncate
+   * @param partNames
+   *          List of partitions to truncate. NULL will truncate the whole 
table/all partitions
+   * @throws MetaException Failure in the RDBMS or storage
+   * @throws TException Thrift transport exception
+   */
+  void truncateTable(String dbName, String tableName, List<String> partNames) 
throws MetaException, TException;
+
+  void truncateTable(String dbName, String tableName, List<String> partNames,
+      String validWriteIds, long writeId) throws TException;
+
+  /**
+   * Truncate the table/partitions in the DEFAULT database.
+   * @param catName catalog name
+   * @param dbName
+   *          The db to which the table to be truncate belongs to
+   * @param tableName
+   *          The table to truncate
+   * @param partNames
+   *          List of partitions to truncate. NULL will truncate the whole 
table/all partitions
+   * @throws MetaException Failure in the RDBMS or storage
+   * @throws TException Thrift transport exception
+   */
+  void truncateTable(String catName, String dbName, String tableName, 
List<String> partNames)
+      throws MetaException, TException;
+
+  /**
+   * Recycles the files recursively from the input path to the cmroot 
directory either by copying or moving it.
+   *
+   * @param request Inputs for path of the data files to be recycled to cmroot 
and
+   *                isPurge flag when set to true files which needs to be 
recycled are not moved to Trash
+   * @return Response which is currently void
+   */
+  CmRecycleResponse recycleDirToCmPath(CmRecycleRequest request) throws 
MetaException, TException;
+
+  /**
+   * Check whether a table exists in the default catalog.
+   * @param databaseName database name
+   * @param tableName table name
+   * @return true if the indicated table exists, false if not
+   * @throws MetaException error fetching form the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException the indicated database does not exist.
+   */
+  boolean tableExists(String databaseName, String tableName)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Check whether a table exists.
+   * @param catName catalog name
+   * @param dbName database name
+   * @param tableName table name
+   * @return true if the indicated table exists, false if not
+   * @throws MetaException error fetching form the RDBMS
+   * @throws TException thrift transport error
+   * @throws UnknownDBException the indicated database does not exist.
+   */
+  boolean tableExists(String catName, String dbName, String tableName)
+      throws MetaException, TException, UnknownDBException;
+
+  /**
+   * Get a Database Object in the default catalog
+   * @param databaseName  name of the database to fetch
+   * @return the database
+   * @throws NoSuchObjectException The database does not exist
+   * @throws MetaException Could not fetch the database
+   * @throws TException A thrift communication error occurred
+   */
+  Database getDatabase(String databaseName)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Get a database.
+   * @param catalogName catalog name.  Can be null, in which case
+   * {@link Warehouse#DEFAULT_CATALOG_NAME} will be assumed.
+   * @param databaseName database name
+   * @return the database object
+   * @throws NoSuchObjectException No database with this name exists in the 
specified catalog
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift error
+   */
+  Database getDatabase(String catalogName, String databaseName)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Get a table object in the default catalog.
+   *
+   * @param dbName
+   *          The database the table is located in.
+   * @param tableName
+   *          Name of the table to fetch.
+   * @return An object representing the table.
+   * @throws MetaException
+   *           Could not fetch the table
+   * @throws TException
+   *           A thrift communication error occurred
+   * @throws NoSuchObjectException
+   *           In case the table wasn't found.
+   */
+  Table getTable(String dbName, String tableName) throws MetaException,
+      TException, NoSuchObjectException;
+
+  /**
+   * Get a table object.
+   * @param catName catalog the table is in.
+   * @param dbName database the table is in.
+   * @param tableName table name.
+   * @return table object.
+   * @throws MetaException Something went wrong, usually in the RDBMS.
+   * @throws TException general thrift error.
+   */
+  Table getTable(String catName, String dbName, String tableName) throws 
MetaException, TException;
+
+  Table getTable(String catName, String dbName, String tableName,
+                        String validWriteIdList) throws TException;
+  /**
+   * Get tables as objects (rather than just fetching their names).  This is 
more expensive and
+   * should only be used if you actually need all the information about the 
tables.
+   * @param dbName
+   *          The database the tables are located in.
+   * @param tableNames
+   *          The names of the tables to fetch
+   * @return A list of objects representing the tables.
+   *          Only the tables that can be retrieved from the database are 
returned.  For example,
+   *          if none of the requested tables could be retrieved, an empty 
list is returned.
+   *          There is no guarantee of ordering of the returned tables.
+   * @throws InvalidOperationException
+   *          The input to this operation is invalid (e.g., the list of tables 
names is null)
+   * @throws UnknownDBException
+   *          The requested database could not be fetched.
+   * @throws TException
+   *          A thrift communication error occurred
+   * @throws MetaException
+   *          Any other errors
+   */
+  List<Table> getTableObjectsByName(String dbName, List<String> tableNames)
+      throws MetaException, InvalidOperationException, UnknownDBException, 
TException;
+
+  /**
+   * Get tables as objects (rather than just fetching their names).  This is 
more expensive and
+   * should only be used if you actually need all the information about the 
tables.
+   * @param catName catalog name
+   * @param dbName
+   *          The database the tables are located in.
+   * @param tableNames
+   *          The names of the tables to fetch
+   * @return A list of objects representing the tables.
+   *          Only the tables that can be retrieved from the database are 
returned.  For example,
+   *          if none of the requested tables could be retrieved, an empty 
list is returned.
+   *          There is no guarantee of ordering of the returned tables.
+   * @throws InvalidOperationException
+   *          The input to this operation is invalid (e.g., the list of tables 
names is null)
+   * @throws UnknownDBException
+   *          The requested database could not be fetched.
+   * @throws TException
+   *          A thrift communication error occurred
+   * @throws MetaException
+   *          Any other errors
+   */
+  List<Table> getTableObjectsByName(String catName, String dbName, 
List<String> tableNames)
+      throws MetaException, InvalidOperationException, UnknownDBException, 
TException;
+
+  /**
+   * Returns the invalidation information for the materialized views given as 
input.
+   */
+  Materialization getMaterializationInvalidationInfo(CreationMetadata cm, 
String validTxnList)
+      throws MetaException, InvalidOperationException, UnknownDBException, 
TException;
+
+  /**
+   * Updates the creation metadata for the materialized view.
+   */
+  void updateCreationMetadata(String dbName, String tableName, 
CreationMetadata cm)
+      throws MetaException, TException;
+
+  /**
+   * Updates the creation metadata for the materialized view.
+   */
+  void updateCreationMetadata(String catName, String dbName, String tableName, 
CreationMetadata cm)
+      throws MetaException, TException;
+
+  /**
+  /**
+   * Add a partition to a table and get back the resulting Partition object.  
This creates an
+   * empty default partition with just the partition values set.
+   * @param dbName database name
+   * @param tableName table name
+   * @param partVals partition values
+   * @return the partition object
+   * @throws InvalidObjectException no such table
+   * @throws AlreadyExistsException a partition with these values already 
exists
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  Partition appendPartition(String dbName, String tableName, List<String> 
partVals)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add a partition to a table and get back the resulting Partition object.  
This creates an
+   * empty default partition with just the partition values set.
+   * @param catName catalog name
+   * @param dbName database name
+   * @param tableName table name
+   * @param partVals partition values
+   * @return the partition object
+   * @throws InvalidObjectException no such table
+   * @throws AlreadyExistsException a partition with these values already 
exists
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  Partition appendPartition(String catName, String dbName, String tableName, 
List<String> partVals)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add a partition to a table and get back the resulting Partition object.  
This creates an
+   * empty default partition with just the partition value set.
+   * @param dbName database name.
+   * @param tableName table name.
+   * @param name name of the partition, should be in the form partkey=partval.
+   * @return new partition object.
+   * @throws InvalidObjectException No such table.
+   * @throws AlreadyExistsException Partition of this name already exists.
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  Partition appendPartition(String dbName, String tableName, String name)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add a partition to a table and get back the resulting Partition object.  
This creates an
+   * empty default partition with just the partition value set.
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tableName table name.
+   * @param name name of the partition, should be in the form partkey=partval.
+   * @return new partition object.
+   * @throws InvalidObjectException No such table.
+   * @throws AlreadyExistsException Partition of this name already exists.
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  Partition appendPartition(String catName, String dbName, String tableName, 
String name)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add a partition to the table.
+   *
+   * @param partition
+   *          The partition to add
+   * @return The partition added
+   * @throws InvalidObjectException
+   *           Could not find table to add to
+   * @throws AlreadyExistsException
+   *           Partition already exists
+   * @throws MetaException
+   *           Could not add partition
+   * @throws TException
+   *           Thrift exception
+   */
+  Partition add_partition(Partition partition)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add partitions to the table.
+   *
+   * @param partitions
+   *          The partitions to add
+   * @throws InvalidObjectException
+   *           Could not find table to add to
+   * @throws AlreadyExistsException
+   *           Partition already exists
+   * @throws MetaException
+   *           Could not add partition
+   * @throws TException
+   *           Thrift exception
+   */
+  int add_partitions(List<Partition> partitions)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add a partitions using a spec proxy.
+   * @param partitionSpec partition spec proxy
+   * @return number of partitions that were added
+   * @throws InvalidObjectException the partitionSpec is malformed.
+   * @throws AlreadyExistsException one or more of the partitions already 
exist.
+   * @throws MetaException error accessing the RDBMS or storage.
+   * @throws TException thrift transport error
+   */
+  int add_partitions_pspec(PartitionSpecProxy partitionSpec)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Add partitions to the table.
+   *
+   * @param partitions The partitions to add
+   * @param ifNotExists only add partitions if they don't exist
+   * @param needResults Whether the results are needed
+   * @return the partitions that were added, or null if !needResults
+   */
+  List<Partition> add_partitions(
+      List<Partition> partitions, boolean ifNotExists, boolean needResults)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Get a partition.
+   * @param dbName database name
+   * @param tblName table name
+   * @param partVals partition values for this partition, must be in the same 
order as the
+   *                 partition keys of the table.
+   * @return the partition object
+   * @throws NoSuchObjectException no such partition
+   * @throws MetaException error access the RDBMS.
+   * @throws TException thrift transport error
+   */
+  Partition getPartition(String dbName, String tblName, List<String> partVals)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Get a partition.
+   * @param catName catalog name
+   * @param dbName database name
+   * @param tblName table name
+   * @param partVals partition values for this partition, must be in the same 
order as the
+   *                 partition keys of the table.
+   * @return the partition object
+   * @throws NoSuchObjectException no such partition
+   * @throws MetaException error access the RDBMS.
+   * @throws TException thrift transport error
+   */
+  Partition getPartition(String catName, String dbName, String tblName, 
List<String> partVals)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Move a partition from one table to another
+   * @param partitionSpecs key value pairs that describe the partition to be 
moved.
+   * @param sourceDb database of the source table
+   * @param sourceTable name of the source table
+   * @param destdb database of the destination table
+   * @param destTableName name of the destination table
+   * @return partition object
+   * @throws MetaException error accessing the RDBMS or storage
+   * @throws NoSuchObjectException no such table, for either source or 
destination table
+   * @throws InvalidObjectException error in partition specifications
+   * @throws TException thrift transport error
+   */
+  Partition exchange_partition(Map<String, String> partitionSpecs,
+      String sourceDb, String sourceTable, String destdb,
+      String destTableName) throws MetaException, NoSuchObjectException,
+      InvalidObjectException, TException;
+
+  /**
+   * Move a partition from one table to another
+   * @param partitionSpecs key value pairs that describe the partition to be 
moved.
+   * @param sourceCat catalog of the source table
+   * @param sourceDb database of the source table
+   * @param sourceTable name of the source table
+   * @param destCat catalog of the destination table, for now must the same as 
sourceCat
+   * @param destdb database of the destination table
+   * @param destTableName name of the destination table
+   * @return partition object
+   * @throws MetaException error accessing the RDBMS or storage
+   * @throws NoSuchObjectException no such table, for either source or 
destination table
+   * @throws InvalidObjectException error in partition specifications
+   * @throws TException thrift transport error
+   */
+  Partition exchange_partition(Map<String, String> partitionSpecs, String 
sourceCat,
+                               String sourceDb, String sourceTable, String 
destCat, String destdb,
+                               String destTableName) throws MetaException, 
NoSuchObjectException,
+      InvalidObjectException, TException;
+
+  /**
+   * With the one partitionSpecs to exchange, multiple partitions could be 
exchanged.
+   * e.g., year=2015/month/day, exchanging partition year=2015 results to all 
the partitions
+   * belonging to it exchanged. This function returns the list of affected 
partitions.
+   * @param partitionSpecs key value pairs that describe the partition(s) to 
be moved.
+   * @param sourceDb database of the source table
+   * @param sourceTable name of the source table
+   * @param destdb database of the destination table
+   * @param destTableName name of the destination table
+   * @throws MetaException error accessing the RDBMS or storage
+   * @throws NoSuchObjectException no such table, for either source or 
destination table
+   * @throws InvalidObjectException error in partition specifications
+   * @throws TException thrift transport error
+   * @return the list of the new partitions
+   */
+  List<Partition> exchange_partitions(Map<String, String> partitionSpecs,
+      String sourceDb, String sourceTable, String destdb,
+      String destTableName) throws MetaException, NoSuchObjectException,
+      InvalidObjectException, TException;
+
+  /**
+   * With the one partitionSpecs to exchange, multiple partitions could be 
exchanged.
+   * e.g., year=2015/month/day, exchanging partition year=2015 results to all 
the partitions
+   * belonging to it exchanged. This function returns the list of affected 
partitions.
+   * @param partitionSpecs key value pairs that describe the partition(s) to 
be moved.
+   * @param sourceCat catalog of the source table
+   * @param sourceDb database of the source table
+   * @param sourceTable name of the source table
+   * @param destCat catalog of the destination table, for now must the same as 
sourceCat
+   * @param destdb database of the destination table
+   * @param destTableName name of the destination table
+   * @throws MetaException error accessing the RDBMS or storage
+   * @throws NoSuchObjectException no such table, for either source or 
destination table
+   * @throws InvalidObjectException error in partition specifications
+   * @throws TException thrift transport error
+   * @return the list of the new partitions
+   */
+  List<Partition> exchange_partitions(Map<String, String> partitionSpecs, 
String sourceCat,
+                                      String sourceDb, String sourceTable, 
String destCat,
+                                      String destdb, String destTableName)
+      throws MetaException, NoSuchObjectException, InvalidObjectException, 
TException;
+
+  /**
+   * Get a Partition by name.
+   * @param dbName database name.
+   * @param tblName table name.
+   * @param name - partition name i.e. 'ds=2010-02-03/ts=2010-02-03 
18%3A16%3A01'
+   * @return the partition object
+   * @throws MetaException error access the RDBMS.
+   * @throws TException thrift transport error
+   */
+  Partition getPartition(String dbName, String tblName, String name)
+      throws MetaException, UnknownTableException, NoSuchObjectException, 
TException;
+
+  /**
+   * Get a Partition by name.
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tblName table name.
+   * @param name - partition name i.e. 'ds=2010-02-03/ts=2010-02-03 
18%3A16%3A01'
+   * @return the partition object
+   * @throws MetaException error access the RDBMS.
+   * @throws TException thrift transport error
+   */
+  Partition getPartition(String catName, String dbName, String tblName, String 
name)
+      throws MetaException, UnknownTableException, NoSuchObjectException, 
TException;
+
+
+  /**
+   * Get a Partition along with authorization information.
+   * @param dbName database name
+   * @param tableName table name
+   * @param pvals partition values, must be in the same order as the tables 
partition keys
+   * @param userName name of the calling user
+   * @param groupNames groups the call
+   * @return the partition
+   * @throws MetaException error accessing the RDBMS
+   * @throws UnknownTableException no such table
+   * @throws NoSuchObjectException no such partition
+   * @throws TException thrift transport error
+   */
+  Partition getPartitionWithAuthInfo(String dbName, String tableName,
+      List<String> pvals, String userName, List<String> groupNames)
+      throws MetaException, UnknownTableException, NoSuchObjectException, 
TException;
+
+  /**
+   * Get a Partition along with authorization information.
+   * @param catName catalog name
+   * @param dbName database name
+   * @param tableName table name
+   * @param pvals partition values, must be in the same order as the tables 
partition keys
+   * @param userName name of the calling user
+   * @param groupNames groups the call
+   * @return the partition
+   * @throws MetaException error accessing the RDBMS
+   * @throws UnknownTableException no such table
+   * @throws NoSuchObjectException no such partition
+   * @throws TException thrift transport error
+   */
+  Partition getPartitionWithAuthInfo(String catName, String dbName, String 
tableName,
+                                     List<String> pvals, String userName, 
List<String> groupNames)
+      throws MetaException, UnknownTableException, NoSuchObjectException, 
TException;
+
+  /**
+   * Get a list of partittions for a table.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param max_parts maximum number of parts to return, -1 for all
+   * @return the list of partitions
+   * @throws NoSuchObjectException No such table.
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitions(String db_name, String tbl_name, short 
max_parts)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Get a list of partittions for a table.
+   * @param catName catalog name
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param max_parts maximum number of parts to return, -1 for all
+   * @return the list of partitions
+   * @throws NoSuchObjectException No such table.
+   * @throws MetaException error accessing RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitions(String catName, String db_name, String 
tbl_name, int max_parts)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Get a list of partitions from a table, returned in the form of 
PartitionSpecProxy
+   * @param dbName database name.
+   * @param tableName table name.
+   * @param maxParts maximum number of partitions to return, or -1 for all
+   * @return a PartitionSpecProxy
+   * @throws TException thrift transport error
+   */
+  PartitionSpecProxy listPartitionSpecs(String dbName, String tableName, int 
maxParts)
+    throws TException;
+
+  /**
+   * Get a list of partitions from a table, returned in the form of 
PartitionSpecProxy
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tableName table name.
+   * @param maxParts maximum number of partitions to return, or -1 for all
+   * @return a PartitionSpecProxy
+   * @throws TException thrift transport error
+   */
+  PartitionSpecProxy listPartitionSpecs(String catName, String dbName, String 
tableName,
+                                        int maxParts) throws TException;
+
+  /**
+   * Get a list of partitions based on a (possibly partial) list of partition 
values.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param part_vals partition values, in order of the table partition keys.  
These can be
+   *                  partial, or .* to match all values for a particular key.
+   * @param max_parts maximum number of partitions to return, or -1 for all.
+   * @return list of partitions
+   * @throws NoSuchObjectException no such table.
+   * @throws MetaException error accessing the database or processing the 
partition values.
+   * @throws TException thrift transport error.
+   */
+  List<Partition> listPartitions(String db_name, String tbl_name,
+      List<String> part_vals, short max_parts) throws NoSuchObjectException, 
MetaException, TException;
+
+  /**
+   * Get a list of partitions based on a (possibly partial) list of partition 
values.
+   * @param catName catalog name.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param part_vals partition values, in order of the table partition keys.  
These can be
+   *                  partial, or .* to match all values for a particular key.
+   * @param max_parts maximum number of partitions to return, or -1 for all.
+   * @return list of partitions
+   * @throws NoSuchObjectException no such table.
+   * @throws MetaException error accessing the database or processing the 
partition values.
+   * @throws TException thrift transport error.
+   */
+  List<Partition> listPartitions(String catName, String db_name, String 
tbl_name,
+                                 List<String> part_vals, int max_parts)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * List Names of partitions in a table.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param max_parts maximum number of parts of fetch, or -1 to fetch them 
all.
+   * @return list of partition names.
+   * @throws NoSuchObjectException No such table.
+   * @throws MetaException Error accessing the RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> listPartitionNames(String db_name, String tbl_name,
+      short max_parts) throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * List Names of partitions in a table.
+   * @param catName catalog name.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param max_parts maximum number of parts of fetch, or -1 to fetch them 
all.
+   * @return list of partition names.
+   * @throws NoSuchObjectException No such table.
+   * @throws MetaException Error accessing the RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<String> listPartitionNames(String catName, String db_name, String 
tbl_name,
+                                  int max_parts) throws NoSuchObjectException, 
MetaException, TException;
+
+  /**
+   * Get a list of partition names matching a partial specification of the 
partition values.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param part_vals partial list of partition values.  These must be given 
in the order of the
+   *                  partition keys.  If you wish to accept any value for a 
particular key you
+   *                  can pass ".*" for that value in this list.
+   * @param max_parts maximum number of partition names to return, or -1 to 
return all that are
+   *                  found.
+   * @return list of matching partition names.
+   * @throws MetaException error accessing the RDBMS.
+   * @throws TException thrift transport error.
+   * @throws NoSuchObjectException no such table.
+   */
+  List<String> listPartitionNames(String db_name, String tbl_name,
+      List<String> part_vals, short max_parts)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Get a list of partition names matching a partial specification of the 
partition values.
+   * @param catName catalog name.
+   * @param db_name database name.
+   * @param tbl_name table name.
+   * @param part_vals partial list of partition values.  These must be given 
in the order of the
+   *                  partition keys.  If you wish to accept any value for a 
particular key you
+   *                  can pass ".*" for that value in this list.
+   * @param max_parts maximum number of partition names to return, or -1 to 
return all that are
+   *                  found.
+   * @return list of matching partition names.
+   * @throws MetaException error accessing the RDBMS.
+   * @throws TException thrift transport error.
+   * @throws NoSuchObjectException no such table.
+   */
+  List<String> listPartitionNames(String catName, String db_name, String 
tbl_name,
+                                  List<String> part_vals, int max_parts)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Get a list of partition values
+   * @param request request
+   * @return reponse
+   * @throws MetaException error accessing RDBMS
+   * @throws TException thrift transport error
+   * @throws NoSuchObjectException no such table
+   */
+  PartitionValuesResponse listPartitionValues(PartitionValuesRequest request)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Get number of partitions matching specified filter
+   * @param dbName the database name
+   * @param tableName the table name
+   * @param filter the filter string,
+   *    for example "part1 = \"p1_abc\" and part2 &lt;= "\p2_test\"". 
Filtering can
+   *    be done only on string partition keys.
+   * @return number of partitions
+   * @throws MetaException error accessing RDBMS or processing the filter
+   * @throws NoSuchObjectException no such table
+   * @throws TException thrift transport error
+   */
+  int getNumPartitionsByFilter(String dbName, String tableName,
+                               String filter) throws MetaException, 
NoSuchObjectException, TException;
+
+  /**
+   * Get number of partitions matching specified filter
+   * @param catName catalog name
+   * @param dbName the database name
+   * @param tableName the table name
+   * @param filter the filter string,
+   *    for example "part1 = \"p1_abc\" and part2 &lt;= "\p2_test\"". 
Filtering can
+   *    be done only on string partition keys.
+   * @return number of partitions
+   * @throws MetaException error accessing RDBMS or processing the filter
+   * @throws NoSuchObjectException no such table
+   * @throws TException thrift transport error
+   */
+  int getNumPartitionsByFilter(String catName, String dbName, String tableName,
+                               String filter) throws MetaException, 
NoSuchObjectException, TException;
+
+
+  /**
+   * Get list of partitions matching specified filter
+   * @param db_name the database name
+   * @param tbl_name the table name
+   * @param filter the filter string,
+   *    for example "part1 = \"p1_abc\" and part2 &lt;= "\p2_test\"". 
Filtering can
+   *    be done only on string partition keys.
+   * @param max_parts the maximum number of partitions to return,
+   *    all partitions are returned if -1 is passed
+   * @return list of partitions
+   * @throws MetaException Error accessing the RDBMS or processing the filter.
+   * @throws NoSuchObjectException No such table.
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsByFilter(String db_name, String tbl_name,
+      String filter, short max_parts) throws MetaException, 
NoSuchObjectException, TException;
+
+  /**
+   * Get list of partitions matching specified filter
+   * @param catName catalog name.
+   * @param db_name the database name
+   * @param tbl_name the table name
+   * @param filter the filter string,
+   *    for example "part1 = \"p1_abc\" and part2 &lt;= "\p2_test\"". 
Filtering can
+   *    be done only on string partition keys.
+   * @param max_parts the maximum number of partitions to return,
+   *    all partitions are returned if -1 is passed
+   * @return list of partitions
+   * @throws MetaException Error accessing the RDBMS or processing the filter.
+   * @throws NoSuchObjectException No such table.
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsByFilter(String catName, String db_name, 
String tbl_name,
+                                         String filter, int max_parts)
+      throws MetaException, NoSuchObjectException, TException;
+
+  /**
+   * Get a list of partitions in a PartitionSpec, using a filter to select 
which partitions to
+   * fetch.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param filter SQL where clause filter
+   * @param max_parts maximum number of partitions to fetch, or -1 for all
+   * @return PartitionSpec
+   * @throws MetaException error accessing RDBMS or processing the filter
+   * @throws NoSuchObjectException No table matches the request
+   * @throws TException thrift transport error
+   */
+  PartitionSpecProxy listPartitionSpecsByFilter(String db_name, String 
tbl_name,
+                                                String filter, int max_parts)
+      throws MetaException, NoSuchObjectException, TException;
+
+  /**
+   * Get a list of partitions in a PartitionSpec, using a filter to select 
which partitions to
+   * fetch.
+   * @param catName catalog name
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param filter SQL where clause filter
+   * @param max_parts maximum number of partitions to fetch, or -1 for all
+   * @return PartitionSpec
+   * @throws MetaException error accessing RDBMS or processing the filter
+   * @throws NoSuchObjectException No table matches the request
+   * @throws TException thrift transport error
+   */
+  PartitionSpecProxy listPartitionSpecsByFilter(String catName, String 
db_name, String tbl_name,
+                                                String filter, int max_parts)
+      throws MetaException, NoSuchObjectException, TException;
+
+  /**
+   * Get list of partitions matching specified serialized expression
+   * @param db_name the database name
+   * @param tbl_name the table name
+   * @param expr expression, serialized from ExprNodeDesc
+   * @param max_parts the maximum number of partitions to return,
+   *    all partitions are returned if -1 is passed
+   * @param default_partition_name Default partition name from configuration. 
If blank, the
+   *    metastore server-side configuration is used.
+   * @param result the resulting list of partitions
+   * @return whether the resulting list contains partitions which may or may 
not match the expr
+   * @throws TException thrift transport error or error executing the filter.
+   */
+  boolean listPartitionsByExpr(String db_name, String tbl_name,
+      byte[] expr, String default_partition_name, short max_parts, 
List<Partition> result)
+          throws TException;
+
+  /**
+   * Get list of partitions matching specified serialized expression
+   * @param catName catalog name
+   * @param db_name the database name
+   * @param tbl_name the table name
+   * @param expr expression, serialized from ExprNodeDesc
+   * @param max_parts the maximum number of partitions to return,
+   *    all partitions are returned if -1 is passed
+   * @param default_partition_name Default partition name from configuration. 
If blank, the
+   *    metastore server-side configuration is used.
+   * @param result the resulting list of partitions
+   * @return whether the resulting list contains partitions which may or may 
not match the expr
+   * @throws TException thrift transport error or error executing the filter.
+   */
+  boolean listPartitionsByExpr(String catName, String db_name, String 
tbl_name, byte[] expr,
+                               String default_partition_name, int max_parts, 
List<Partition> result)
+      throws TException;
+
+  /**
+   * List partitions, fetching the authorization information along with the 
partitions.
+   * @param dbName database name
+   * @param tableName table name
+   * @param maxParts maximum number of partitions to fetch, or -1 for all
+   * @param userName user to fetch privileges for
+   * @param groupNames groups to fetch privileges for
+   * @return the list of partitions
+   * @throws NoSuchObjectException no partitions matching the criteria were 
found
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsWithAuthInfo(String dbName,
+      String tableName, short maxParts, String userName, List<String> 
groupNames)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * List partitions, fetching the authorization information along with the 
partitions.
+   * @param catName catalog name
+   * @param dbName database name
+   * @param tableName table name
+   * @param maxParts maximum number of partitions to fetch, or -1 for all
+   * @param userName user to fetch privileges for
+   * @param groupNames groups to fetch privileges for
+   * @return the list of partitions
+   * @throws NoSuchObjectException no partitions matching the criteria were 
found
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsWithAuthInfo(String catName, String dbName, 
String tableName,
+                                             int maxParts, String userName, 
List<String> groupNames)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Get partitions by a list of partition names.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param part_names list of partition names
+   * @return list of Partition objects
+   * @throws NoSuchObjectException No such partitions
+   * @throws MetaException error accessing the RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<Partition> getPartitionsByNames(String db_name, String tbl_name,
+      List<String> part_names) throws NoSuchObjectException, MetaException, 
TException;
+
+  /**
+   * Get partitions by a list of partition names.
+   * @param catName catalog name
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param part_names list of partition names
+   * @return list of Partition objects
+   * @throws NoSuchObjectException No such partitions
+   * @throws MetaException error accessing the RDBMS.
+   * @throws TException thrift transport error
+   */
+  List<Partition> getPartitionsByNames(String catName, String db_name, String 
tbl_name,
+                                       List<String> part_names)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * List partitions along with privilege information for a user or groups
+   * @param dbName database name
+   * @param tableName table name
+   * @param partialPvals partition values, can be partial
+   * @param maxParts maximum number of partitions to fetch, or -1 for all
+   * @param userName user to fetch privilege information for
+   * @param groupNames group to fetch privilege information for
+   * @return the list of partitions
+   * @throws NoSuchObjectException no partitions matching the criteria were 
found
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsWithAuthInfo(String dbName,
+      String tableName, List<String> partialPvals, short maxParts, String 
userName,
+      List<String> groupNames) throws MetaException, TException, 
NoSuchObjectException;
+
+  /**
+   * List partitions along with privilege information for a user or groups
+   * @param dbName database name
+   * @param tableName table name
+   * @param partialPvals partition values, can be partial
+   * @param maxParts maximum number of partitions to fetch, or -1 for all
+   * @param userName user to fetch privilege information for
+   * @param groupNames group to fetch privilege information for
+   * @return the list of partitions
+   * @throws NoSuchObjectException no partitions matching the criteria were 
found
+   * @throws MetaException error accessing the RDBMS
+   * @throws TException thrift transport error
+   */
+  List<Partition> listPartitionsWithAuthInfo(String catName, String dbName, 
String tableName,
+                                             List<String> partialPvals, int 
maxParts, String userName,
+                                             List<String> groupNames)
+      throws MetaException, TException, NoSuchObjectException;
+
+  /**
+   * Mark an event as having occurred on a partition.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param partKVs key value pairs that describe the partition
+   * @param eventType type of the event
+   * @throws MetaException error access the RDBMS
+   * @throws NoSuchObjectException never throws this AFAICT
+   * @throws TException thrift transport error
+   * @throws UnknownTableException no such table
+   * @throws UnknownDBException no such database
+   * @throws UnknownPartitionException no such partition
+   * @throws InvalidPartitionException partition partKVs is invalid
+   */
+  void markPartitionForEvent(String db_name, String tbl_name, 
Map<String,String> partKVs,
+      PartitionEventType eventType) throws MetaException, 
NoSuchObjectException, TException,
+      UnknownTableException, UnknownDBException, UnknownPartitionException, 
InvalidPartitionException;
+
+  /**
+   * Mark an event as having occurred on a partition.
+   * @param catName catalog name
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param partKVs key value pairs that describe the partition
+   * @param eventType type of the event
+   * @throws MetaException error access the RDBMS
+   * @throws NoSuchObjectException never throws this AFAICT
+   * @throws TException thrift transport error
+   * @throws UnknownTableException no such table
+   * @throws UnknownDBException no such database
+   * @throws UnknownPartitionException no such partition
+   * @throws InvalidPartitionException partition partKVs is invalid
+   */
+  void markPartitionForEvent(String catName, String db_name, String tbl_name, 
Map<String,String> partKVs,
+                             PartitionEventType eventType) throws 
MetaException, NoSuchObjectException, TException,
+      UnknownTableException, UnknownDBException, UnknownPartitionException, 
InvalidPartitionException;
+
+  /**
+   * Determine whether a partition has been marked with a particular event 
type.
+   * @param db_name database name
+   * @param tbl_name table name.
+   * @param partKVs key value pairs that describe the partition.
+   * @param eventType event type
+   * @throws MetaException error access the RDBMS
+   * @throws NoSuchObjectException never throws this AFAICT
+   * @throws TException thrift transport error
+   * @throws UnknownTableException no such table
+   * @throws UnknownDBException no such database
+   * @throws UnknownPartitionException no such partition
+   * @throws InvalidPartitionException partition partKVs is invalid
+   */
+  boolean isPartitionMarkedForEvent(String db_name, String tbl_name, 
Map<String,String> partKVs,
+      PartitionEventType eventType) throws MetaException, 
NoSuchObjectException, TException,
+      UnknownTableException, UnknownDBException, UnknownPartitionException, 
InvalidPartitionException;
+
+  /**
+   * Determine whether a partition has been marked with a particular event 
type.
+   * @param catName catalog name
+   * @param db_name database name
+   * @param tbl_name table name.
+   * @param partKVs key value pairs that describe the partition.
+   * @param eventType event type
+   * @throws MetaException error access the RDBMS
+   * @throws NoSuchObjectException never throws this AFAICT
+   * @throws TException thrift transport error
+   * @throws UnknownTableException no such table
+   * @throws UnknownDBException no such database
+   * @throws UnknownPartitionException no such partition
+   * @throws InvalidPartitionException partition partKVs is invalid
+   */
+  boolean isPartitionMarkedForEvent(String catName, String db_name, String 
tbl_name, Map<String,String> partKVs,
+                                    PartitionEventType eventType) throws 
MetaException, NoSuchObjectException, TException,
+      UnknownTableException, UnknownDBException, UnknownPartitionException, 
InvalidPartitionException;
+
+  /**
+   * @param partVals
+   * @throws TException
+   * @throws MetaException
+   */
+  void validatePartitionNameCharacters(List<String> partVals) throws 
TException, MetaException;
+
+  /**
+   * @param tbl
+   * @throws AlreadyExistsException
+   * @throws InvalidObjectException
+   * @throws MetaException
+   * @throws NoSuchObjectException
+   * @throws TException
+   * @see 
org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore.Iface#create_table(org.apache.hadoop.hive.metastore.api.Table)
+   */
+
+  void createTable(Table tbl) throws AlreadyExistsException,
+      InvalidObjectException, MetaException, NoSuchObjectException, TException;
+
+  /**
+   * Alter a table
+   * @param databaseName database name
+   * @param tblName table name
+   * @param table new table object, should be complete representation of the 
table, not just the
+   *             things you want to change.
+   * @throws InvalidOperationException something is wrong with the new table 
object or an
+   * operation was attempted that is not allowed (such as changing partition 
columns).
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift exception
+   */
+  void alter_table(String databaseName, String tblName, Table table)
+      throws InvalidOperationException, MetaException, TException;
+
+  /**
+   * Alter a table. Equivalent to
+   * {@link #alter_table(String, String, String, Table, EnvironmentContext)} 
with
+   * EnvironmentContext set to null.
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tblName table name.
+   * @param newTable new table object, should be complete representation of 
the table, not just the
+   *                 things you want to change.
+   * @throws InvalidOperationException something is wrong with the new table 
object or an
+   * operation was attempted that is not allowed (such as changing partition 
columns).
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift exception
+   */
+  default void alter_table(String catName, String dbName, String tblName, 
Table newTable)
+      throws InvalidOperationException, MetaException, TException {
+    alter_table(catName, dbName, tblName, newTable, null);
+  }
+
+  /**
+   * Alter a table.
+   * @param catName catalog name.
+   * @param dbName database name.
+   * @param tblName table name.
+   * @param newTable new table object, should be complete representation of 
the table, not just the
+   *                 things you want to change.
+   * @param envContext options for the alter.
+   * @throws InvalidOperationException something is wrong with the new table 
object or an
+   * operation was attempted that is not allowed (such as changing partition 
columns).
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift exception
+   */
+  void alter_table(String catName, String dbName, String tblName, Table 
newTable,
+                  EnvironmentContext envContext)
+      throws InvalidOperationException, MetaException, TException;
+
+  /**
+   * @deprecated Use alter_table_with_environmentContext instead of 
alter_table with cascade option
+   * passed in EnvironmentContext using {@code StatsSetupConst.CASCADE}
+   */
+  @Deprecated
+  void alter_table(String defaultDatabaseName, String tblName, Table table,
+      boolean cascade) throws InvalidOperationException, MetaException, 
TException;
+
+  /**
+   * Alter a table.
+   * @param databaseName database name
+   * @param tblName table name
+   * @param table new table object, should be complete representation of the 
table, not just the
+   *              things you want to change.
+   * @param environmentContext options for the alter.
+   * @throws InvalidOperationException something is wrong with the new table 
object or an
+   * operation was attempted that is not allowed (such as changing partition 
columns).
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift exception
+   */
+  @Deprecated
+  void alter_table_with_environmentContext(String databaseName, String 
tblName, Table table,
+      EnvironmentContext environmentContext) throws InvalidOperationException, 
MetaException,
+      TException;
+
+  void alter_table(String catName, String databaseName, String tblName, Table 
table,
+      EnvironmentContext environmentContext, String validWriteIdList)
+          throws InvalidOperationException, MetaException, TException;
+  /**
+   * Create a new database.
+   * @param db database object.  If the catalog name is null it will be 
assumed to be
+   *           {@link Warehouse#DEFAULT_CATALOG_NAME}.
+   * @throws InvalidObjectException There is something wrong with the database 
object.
+   * @throws AlreadyExistsException There is already a database of this name 
in the specified
+   * catalog.
+   * @throws MetaException something went wrong, usually in the RDBMS
+   * @throws TException general thrift error
+   */
+  void createDatabase(Database db)
+      throws InvalidObjectException, AlreadyExistsException, MetaException, 
TException;
+
+  /**
+   * Drop a database.
+   * @param name name of the database to drop.
+   * @throws NoSuchObjectException No such database exists.
+   * @throws InvalidOperationException The database cannot be dropped because 
it is not empty.
+   * @throws MetaException something went wrong, usually either in the RDMBS 
or in storage.
+   * @throws TException general thrift error.
+   */
+  void dropDatabase(String name)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException;
+
+  /**
+   *
+   * Drop a database.
+   * @param name name of the database to drop.
+   * @param deleteData whether to drop the underlying HDFS directory.
+   * @param ignoreUnknownDb whether to ignore an attempt to drop a 
non-existant database
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog and
+   * ignoreUnknownDb is false.
+   * @throws InvalidOperationException The database cannot be dropped because 
it is not empty.
+   * @throws MetaException something went wrong, usually either in the RDMBS 
or in storage.
+   * @throws TException general thrift error.
+   */
+  void dropDatabase(String name, boolean deleteData, boolean ignoreUnknownDb)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException;
+
+  /**
+   *
+   * Drop a database.
+   * @param name database name.
+   * @param deleteData whether to drop the underlying HDFS directory.
+   * @param ignoreUnknownDb whether to ignore an attempt to drop a 
non-existant database
+   * @param cascade whether to drop contained tables, etc.  If this is false 
and there are
+   *                objects still in the database the drop will fail.
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog and
+   * ignoreUnknownDb is false.
+   * @throws InvalidOperationException The database contains objects and 
cascade is false.
+   * @throws MetaException something went wrong, usually either in the RDBMS 
or storage.
+   * @throws TException general thrift error.
+   */
+  void dropDatabase(String name, boolean deleteData, boolean ignoreUnknownDb, 
boolean cascade)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException;
+
+  /**
+   * Drop a database.
+   * @param catName Catalog name.  This can be null, in which case
+   *                {@link Warehouse#DEFAULT_CATALOG_NAME} will be assumed.
+   * @param dbName database name.
+   * @param deleteData whether to drop the underlying HDFS directory.
+   * @param ignoreUnknownDb whether to ignore an attempt to drop a 
non-existant database
+   * @param cascade whether to drop contained tables, etc.  If this is false 
and there are
+   *                objects still in the database the drop will fail.
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog and
+   * ignoreUnknownDb is false.
+   * @throws InvalidOperationException The database contains objects and 
cascade is false.
+   * @throws MetaException something went wrong, usually either in the RDBMS 
or storage.
+   * @throws TException general thrift error.
+   */
+  void dropDatabase(String catName, String dbName, boolean deleteData, boolean 
ignoreUnknownDb,
+                    boolean cascade)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException;
+
+  /**
+   * Drop a database.  Equivalent to
+   * {@link #dropDatabase(String, String, boolean, boolean, boolean)} with 
cascade = false.
+   * @param catName Catalog name.  This can be null, in which case
+   *                {@link Warehouse#DEFAULT_CATALOG_NAME} will be assumed.
+   * @param dbName database name.
+   * @param deleteData whether to drop the underlying HDFS directory.
+   * @param ignoreUnknownDb whether to ignore an attempt to drop a 
non-existant database
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog and
+   * ignoreUnknownDb is false.
+   * @throws InvalidOperationException The database contains objects and 
cascade is false.
+   * @throws MetaException something went wrong, usually either in the RDBMS 
or storage.
+   * @throws TException general thrift error.
+   */
+  default void dropDatabase(String catName, String dbName, boolean deleteData,
+                            boolean ignoreUnknownDb)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException {
+    dropDatabase(catName, dbName, deleteData, ignoreUnknownDb, false);
+  }
+
+  /**
+   * Drop a database.  Equivalent to
+   * {@link #dropDatabase(String, String, boolean, boolean, boolean)} with 
deleteData =
+   * true, ignoreUnknownDb = false, cascade = false.
+   * @param catName Catalog name.  This can be null, in which case
+   *                {@link Warehouse#DEFAULT_CATALOG_NAME} will be assumed.
+   * @param dbName database name.
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog and
+   * ignoreUnknownDb is false.
+   * @throws InvalidOperationException The database contains objects and 
cascade is false.
+   * @throws MetaException something went wrong, usually either in the RDBMS 
or storage.
+   * @throws TException general thrift error.
+   */
+  default void dropDatabase(String catName, String dbName)
+      throws NoSuchObjectException, InvalidOperationException, MetaException, 
TException {
+    dropDatabase(catName, dbName, true, false, false);
+  }
+
+
+  /**
+   * Alter a database.
+   * @param name database name.
+   * @param db new database object.
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog.
+   * @throws MetaException something went wrong, usually in the RDBMS.
+   * @throws TException general thrift error.
+   */
+  void alterDatabase(String name, Database db)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Alter a database.
+   * @param catName Catalog name.  This can be null, in which case
+   *                {@link Warehouse#DEFAULT_CATALOG_NAME} will be assumed.
+   * @param dbName database name.
+   * @param newDb new database object.
+   * @throws NoSuchObjectException No database of this name exists in the 
specified catalog.
+   * @throws MetaException something went wrong, usually in the RDBMS.
+   * @throws TException general thrift error.
+   */
+  void alterDatabase(String catName, String dbName, Database newDb)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Drop a partition.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param part_vals partition values, in the same order as the partition keys
+   * @param deleteData
+   *          delete the underlying data or just delete the partition in 
metadata
+   * @return true or false
+   * @throws NoSuchObjectException partition does not exist
+   * @throws MetaException error accessing the RDBMS or the storage.
+   * @throws TException thrift transport error
+   */
+  boolean dropPartition(String db_name, String tbl_name,
+      List<String> part_vals, boolean deleteData) throws NoSuchObjectException,
+      MetaException, TException;
+
+  /**
+   * Drop a partition.
+   * @param catName catalog name.
+   * @param db_name database name
+   * @param tbl_name table name
+   * @param part_vals partition values, in the same order as the partition keys
+   * @param deleteData
+   *          delete the underlying data or just delete the partition in 
metadata
+   * @return true or false
+   * @throws NoSuchObjectException partition does not exist
+   * @throws MetaException error accessing the RDBMS or the storage.
+   * @throws TException thrift transport error
+   */
+  boolean dropPartition(String catName, String db_name, String tbl_name,
+                        List<String> part_vals, boolean deleteData) throws 
NoSuchObjectException,
+      MetaException, TException;
+
+  /**
+   * Drop a partition with the option to purge the partition data directly,
+   * rather than to move data to trash.
+   * @param db_name Name of the database.
+   * @param tbl_name Name of the table.
+   * @param part_vals Specification of the partitions being dropped.
+   * @param options PartitionDropOptions for the operation.
+   * @return True (if partitions are dropped), else false.
+   * @throws NoSuchObjectException partition does not exist
+   * @throws MetaException error accessing the RDBMS or the storage.
+   * @throws TException thrift transport error.
+   */
+  boolean dropPartition(String db_name, String tbl_name, List<String> 
part_vals,
+                        PartitionDropOptions options)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Drop a partition with the option to purge the partition data directly,
+   * rather than to move data to trash.
+   * @param catName catalog name.
+   * @param db_name Name of the database.
+   * @param tbl_name Name of the table.
+   * @param part_vals Specification of the partitions being dropped.
+   * @param options PartitionDropOptions for the operation.
+   * @return True (if partitions are dropped), else false.
+   * @throws NoSuchObjectException partition does not exist
+   * @throws MetaException error accessing the RDBMS or the storage.
+   * @throws TException thrift transport error.
+   */
+  boolean dropPartition(String catName, String db_name, String tbl_name, 
List<String> part_vals,
+                        PartitionDropOptions options)
+      throws NoSuchObjectException, MetaException, TException;
+
+  /**
+   * Drop partitions based on an expression.
+   * @param dbName database name.
+   * @param tblName table name.
+   * @param partExprs I don't underst

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