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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. | |
| import getpass | |
| import logging | |
| import socket | |
| import time | |
| from types import TracebackType | |
| from typing import ( | |
| TYPE_CHECKING, | |
| Any, | |
| Dict, | |
| List, | |
| Optional, | |
| Set, | |
| Type, | |
| Union, | |
| ) | |
| from urllib.parse import urlparse | |
| from hive_metastore.ThriftHiveMetastore import Client | |
| from hive_metastore.ttypes import ( | |
| AlreadyExistsException, | |
| CheckLockRequest, | |
| FieldSchema, | |
| InvalidOperationException, | |
| LockComponent, | |
| LockLevel, | |
| LockRequest, | |
| LockResponse, | |
| LockState, | |
| LockType, | |
| MetaException, | |
| NoSuchObjectException, | |
| SerDeInfo, | |
| StorageDescriptor, | |
| UnlockRequest, | |
| ) | |
| from hive_metastore.ttypes import Database as HiveDatabase | |
| from hive_metastore.ttypes import Table as HiveTable | |
| from tenacity import retry, retry_if_exception_type, stop_after_attempt, wait_exponential | |
| from thrift.protocol import TBinaryProtocol | |
| from thrift.transport import TSocket, TTransport | |
| from pyiceberg.catalog import ( | |
| EXTERNAL_TABLE, | |
| ICEBERG, | |
| LOCATION, | |
| METADATA_LOCATION, | |
| TABLE_TYPE, | |
| MetastoreCatalog, | |
| PropertiesUpdateSummary, | |
| ) | |
| from pyiceberg.exceptions import ( | |
| CommitFailedException, | |
| NamespaceAlreadyExistsError, | |
| NamespaceNotEmptyError, | |
| NoSuchIcebergTableError, | |
| NoSuchNamespaceError, | |
| NoSuchPropertyException, | |
| NoSuchTableError, | |
| TableAlreadyExistsError, | |
| WaitingForLockException, | |
| ) | |
| from pyiceberg.partitioning import UNPARTITIONED_PARTITION_SPEC, PartitionSpec | |
| from pyiceberg.schema import Schema, SchemaVisitor, visit | |
| from pyiceberg.serializers import FromInputFile | |
| from pyiceberg.table import ( | |
| CommitTableRequest, | |
| CommitTableResponse, | |
| PropertyUtil, | |
| StagedTable, | |
| Table, | |
| TableProperties, | |
| ) | |
| from pyiceberg.table.sorting import UNSORTED_SORT_ORDER, SortOrder | |
| from pyiceberg.typedef import EMPTY_DICT, Identifier, Properties | |
| from pyiceberg.types import ( | |
| BinaryType, | |
| BooleanType, | |
| DateType, | |
| DecimalType, | |
| DoubleType, | |
| FixedType, | |
| FloatType, | |
| IntegerType, | |
| ListType, | |
| LongType, | |
| MapType, | |
| NestedField, | |
| PrimitiveType, | |
| StringType, | |
| StructType, | |
| TimestampType, | |
| TimestamptzType, | |
| TimeType, | |
| UUIDType, | |
| ) | |
| if TYPE_CHECKING: | |
| import pyarrow as pa | |
| COMMENT = "comment" | |
| OWNER = "owner" | |
| # If set to true, HiveCatalog will operate in Hive2 compatibility mode | |
| HIVE2_COMPATIBLE = "hive.hive2-compatible" | |
| HIVE2_COMPATIBLE_DEFAULT = False | |
| LOCK_CHECK_MIN_WAIT_TIME = "lock-check-min-wait-time" | |
| LOCK_CHECK_MAX_WAIT_TIME = "lock-check-max-wait-time" | |
| LOCK_CHECK_RETRIES = "lock-check-retries" | |
| DEFAULT_LOCK_CHECK_MIN_WAIT_TIME = 0.1 # 100 milliseconds | |
| DEFAULT_LOCK_CHECK_MAX_WAIT_TIME = 60 # 1 min | |
| DEFAULT_LOCK_CHECK_RETRIES = 4 | |
| logger = logging.getLogger(__name__) | |
| class _HiveClient: | |
| """Helper class to nicely open and close the transport.""" | |
| _transport: TTransport | |
| _client: Client | |
| _ugi: Optional[List[str]] | |
| def __init__(self, uri: str, ugi: Optional[str] = None): | |
| url_parts = urlparse(uri) | |
| transport = TSocket.TSocket(url_parts.hostname, url_parts.port) | |
| self._transport = TTransport.TBufferedTransport(transport) | |
| protocol = TBinaryProtocol.TBinaryProtocol(transport) | |
| self._client = Client(protocol) | |
| self._ugi = ugi.split(":") if ugi else None | |
| def __enter__(self) -> Client: | |
| self._transport.open() | |
| if self._ugi: | |
| self._client.set_ugi(*self._ugi) | |
| return self._client | |
| def __exit__( | |
| self, exctype: Optional[Type[BaseException]], excinst: Optional[BaseException], exctb: Optional[TracebackType] | |
| ) -> None: | |
| self._transport.close() | |
| def _construct_hive_storage_descriptor( | |
| schema: Schema, location: Optional[str], hive2_compatible: bool = False | |
| ) -> StorageDescriptor: | |
| ser_de_info = SerDeInfo(serializationLib="org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe") | |
| return StorageDescriptor( | |
| [ | |
| FieldSchema(field.name, visit(field.field_type, SchemaToHiveConverter(hive2_compatible)), field.doc) | |
| for field in schema.fields | |
| ], | |
| location, | |
| "org.apache.hadoop.mapred.FileInputFormat", | |
| "org.apache.hadoop.mapred.FileOutputFormat", | |
| serdeInfo=ser_de_info, | |
| ) | |
| PROP_EXTERNAL = "EXTERNAL" | |
| PROP_TABLE_TYPE = "table_type" | |
| PROP_METADATA_LOCATION = "metadata_location" | |
| PROP_PREVIOUS_METADATA_LOCATION = "previous_metadata_location" | |
| DEFAULT_PROPERTIES = {TableProperties.PARQUET_COMPRESSION: TableProperties.PARQUET_COMPRESSION_DEFAULT} | |
| def _construct_parameters(metadata_location: str, previous_metadata_location: Optional[str] = None) -> Dict[str, Any]: | |
| properties = {PROP_EXTERNAL: "TRUE", PROP_TABLE_TYPE: "ICEBERG", PROP_METADATA_LOCATION: metadata_location} | |
| if previous_metadata_location: | |
| properties[PROP_PREVIOUS_METADATA_LOCATION] = previous_metadata_location | |
| return properties | |
| def _annotate_namespace(database: HiveDatabase, properties: Properties) -> HiveDatabase: | |
| params = {} | |
| for key, value in properties.items(): | |
| if key == COMMENT: | |
| database.description = value | |
| elif key == LOCATION: | |
| database.locationUri = value | |
| else: | |
| params[key] = value | |
| database.parameters = params | |
| return database | |
| HIVE_PRIMITIVE_TYPES = { | |
| BooleanType: "boolean", | |
| IntegerType: "int", | |
| LongType: "bigint", | |
| FloatType: "float", | |
| DoubleType: "double", | |
| DateType: "date", | |
| TimeType: "string", | |
| TimestampType: "timestamp", | |
| TimestamptzType: "timestamp with local time zone", | |
| StringType: "string", | |
| UUIDType: "string", | |
| BinaryType: "binary", | |
| FixedType: "binary", | |
| } | |
| class SchemaToHiveConverter(SchemaVisitor[str]): | |
| hive2_compatible: bool | |
| def __init__(self, hive2_compatible: bool): | |
| self.hive2_compatible = hive2_compatible | |
| def schema(self, schema: Schema, struct_result: str) -> str: | |
| return struct_result | |
| def struct(self, struct: StructType, field_results: List[str]) -> str: | |
| return f"struct<{','.join(field_results)}>" | |
| def field(self, field: NestedField, field_result: str) -> str: | |
| return f"{field.name}:{field_result}" | |
| def list(self, list_type: ListType, element_result: str) -> str: | |
| return f"array<{element_result}>" | |
| def map(self, map_type: MapType, key_result: str, value_result: str) -> str: | |
| # Key has to be primitive for Hive | |
| return f"map<{key_result},{value_result}>" | |
| def primitive(self, primitive: PrimitiveType) -> str: | |
| if isinstance(primitive, DecimalType): | |
| return f"decimal({primitive.precision},{primitive.scale})" | |
| elif self.hive2_compatible and isinstance(primitive, TimestamptzType): | |
| # Hive2 doesn't support timestamp with local time zone | |
| return "timestamp" | |
| else: | |
| return HIVE_PRIMITIVE_TYPES[type(primitive)] | |
| class HiveCatalog(MetastoreCatalog): | |
| _client: _HiveClient | |
| def __init__(self, name: str, **properties: str): | |
| super().__init__(name, **properties) | |
| self._client = _HiveClient(properties["uri"], properties.get("ugi")) | |
| self._lock_check_min_wait_time = PropertyUtil.property_as_float( | |
| properties, LOCK_CHECK_MIN_WAIT_TIME, DEFAULT_LOCK_CHECK_MIN_WAIT_TIME | |
| ) | |
| self._lock_check_max_wait_time = PropertyUtil.property_as_float( | |
| properties, LOCK_CHECK_MAX_WAIT_TIME, DEFAULT_LOCK_CHECK_MAX_WAIT_TIME | |
| ) | |
| self._lock_check_retries = PropertyUtil.property_as_float( | |
| properties, | |
| LOCK_CHECK_RETRIES, | |
| DEFAULT_LOCK_CHECK_RETRIES, | |
| ) | |
| def _convert_hive_into_iceberg(self, table: HiveTable) -> Table: | |
| properties: Dict[str, str] = table.parameters | |
| if TABLE_TYPE not in properties: | |
| raise NoSuchPropertyException( | |
| f"Property table_type missing, could not determine type: {table.dbName}.{table.tableName}" | |
| ) | |
| table_type = properties[TABLE_TYPE] | |
| if table_type.lower() != ICEBERG: | |
| raise NoSuchIcebergTableError( | |
| f"Property table_type is {table_type}, expected {ICEBERG}: {table.dbName}.{table.tableName}" | |
| ) | |
| if prop_metadata_location := properties.get(METADATA_LOCATION): | |
| metadata_location = prop_metadata_location | |
| else: | |
| raise NoSuchPropertyException(f"Table property {METADATA_LOCATION} is missing") | |
| io = self._load_file_io(location=metadata_location) | |
| file = io.new_input(metadata_location) | |
| metadata = FromInputFile.table_metadata(file) | |
| return Table( | |
| identifier=(self.name, table.dbName, table.tableName), | |
| metadata=metadata, | |
| metadata_location=metadata_location, | |
| io=self._load_file_io(metadata.properties, metadata_location), | |
| catalog=self, | |
| ) | |
| def _convert_iceberg_into_hive(self, table: Table) -> HiveTable: | |
| identifier_tuple = self.identifier_to_tuple_without_catalog(table.identifier) | |
| database_name, table_name = self.identifier_to_database_and_table(identifier_tuple, NoSuchTableError) | |
| current_time_millis = int(time.time() * 1000) | |
| return HiveTable( | |
| dbName=database_name, | |
| tableName=table_name, | |
| owner=table.properties[OWNER] if table.properties and OWNER in table.properties else getpass.getuser(), | |
| createTime=current_time_millis // 1000, | |
| lastAccessTime=current_time_millis // 1000, | |
| sd=_construct_hive_storage_descriptor( | |
| table.schema(), | |
| table.location(), | |
| PropertyUtil.property_as_bool(self.properties, HIVE2_COMPATIBLE, HIVE2_COMPATIBLE_DEFAULT), | |
| ), | |
| tableType=EXTERNAL_TABLE, | |
| parameters=_construct_parameters(table.metadata_location), | |
| ) | |
| def _create_hive_table(self, open_client: Client, hive_table: HiveTable) -> None: | |
| try: | |
| open_client.create_table(hive_table) | |
| except AlreadyExistsException as e: | |
| raise TableAlreadyExistsError(f"Table {hive_table.dbName}.{hive_table.tableName} already exists") from e | |
| def _get_hive_table(self, open_client: Client, database_name: str, table_name: str) -> HiveTable: | |
| try: | |
| return open_client.get_table(dbname=database_name, tbl_name=table_name) | |
| except NoSuchObjectException as e: | |
| raise NoSuchTableError(f"Table does not exists: {table_name}") from e | |
| def create_table( | |
| self, | |
| identifier: Union[str, Identifier], | |
| schema: Union[Schema, "pa.Schema"], | |
| location: Optional[str] = None, | |
| partition_spec: PartitionSpec = UNPARTITIONED_PARTITION_SPEC, | |
| sort_order: SortOrder = UNSORTED_SORT_ORDER, | |
| properties: Properties = EMPTY_DICT, | |
| ) -> Table: | |
| """Create a table. | |
| Args: | |
| identifier: Table identifier. | |
| schema: Table's schema. | |
| location: Location for the table. Optional Argument. | |
| partition_spec: PartitionSpec for the table. | |
| sort_order: SortOrder for the table. | |
| properties: Table properties that can be a string based dictionary. | |
| Returns: | |
| Table: the created table instance. | |
| Raises: | |
| AlreadyExistsError: If a table with the name already exists. | |
| ValueError: If the identifier is invalid. | |
| """ | |
| properties = {**DEFAULT_PROPERTIES, **properties} | |
| staged_table = self._create_staged_table( | |
| identifier=identifier, | |
| schema=schema, | |
| location=location, | |
| partition_spec=partition_spec, | |
| sort_order=sort_order, | |
| properties=properties, | |
| ) | |
| database_name, table_name = self.identifier_to_database_and_table(identifier) | |
| self._write_metadata(staged_table.metadata, staged_table.io, staged_table.metadata_location) | |
| tbl = self._convert_iceberg_into_hive(staged_table) | |
| with self._client as open_client: | |
| self._create_hive_table(open_client, tbl) | |
| hive_table = open_client.get_table(dbname=database_name, tbl_name=table_name) | |
| return self._convert_hive_into_iceberg(hive_table) | |
| def register_table(self, identifier: Union[str, Identifier], metadata_location: str) -> Table: | |
| """Register a new table using existing metadata. | |
| Args: | |
| identifier Union[str, Identifier]: Table identifier for the table | |
| metadata_location str: The location to the metadata | |
| Returns: | |
| Table: The newly registered table | |
| Raises: | |
| TableAlreadyExistsError: If the table already exists | |
| """ | |
| raise NotImplementedError | |
| def _create_lock_request(self, database_name: str, table_name: str) -> LockRequest: | |
| lock_component: LockComponent = LockComponent( | |
| level=LockLevel.TABLE, type=LockType.EXCLUSIVE, dbname=database_name, tablename=table_name, isTransactional=True | |
| ) | |
| lock_request: LockRequest = LockRequest(component=[lock_component], user=getpass.getuser(), hostname=socket.gethostname()) | |
| return lock_request | |
| def _wait_for_lock(self, database_name: str, table_name: str, lockid: int, open_client: Client) -> LockResponse: | |
| def _do_wait_for_lock() -> LockResponse: | |
| response: LockResponse = open_client.check_lock(CheckLockRequest(lockid=lockid)) | |
| if response.state == LockState.ACQUIRED: | |
| return response | |
| elif response.state == LockState.WAITING: | |
| msg = f"Wait on lock for {database_name}.{table_name}" | |
| logger.warning(msg) | |
| raise WaitingForLockException(msg) | |
| else: | |
| raise CommitFailedException(f"Failed to check lock for {database_name}.{table_name}, state: {response.state}") | |
| return _do_wait_for_lock() | |
| def _commit_table(self, table_request: CommitTableRequest) -> CommitTableResponse: | |
| """Update the table. | |
| Args: | |
| table_request (CommitTableRequest): The table requests to be carried out. | |
| Returns: | |
| CommitTableResponse: The updated metadata. | |
| Raises: | |
| NoSuchTableError: If a table with the given identifier does not exist. | |
| CommitFailedException: Requirement not met, or a conflict with a concurrent commit. | |
| """ | |
| identifier_tuple = self.identifier_to_tuple_without_catalog( | |
| tuple(table_request.identifier.namespace.root + [table_request.identifier.name]) | |
| ) | |
| database_name, table_name = self.identifier_to_database_and_table(identifier_tuple, NoSuchTableError) | |
| # commit to hive | |
| # https://github.com/apache/hive/blob/master/standalone-metastore/metastore-common/src/main/thrift/hive_metastore.thrift#L1232 | |
| with self._client as open_client: | |
| lock: LockResponse = open_client.lock(self._create_lock_request(database_name, table_name)) | |
| try: | |
| if lock.state != LockState.ACQUIRED: | |
| if lock.state == LockState.WAITING: | |
| self._wait_for_lock(database_name, table_name, lock.lockid, open_client) | |
| else: | |
| raise CommitFailedException(f"Failed to acquire lock for {table_request.identifier}, state: {lock.state}") | |
| hive_table: Optional[HiveTable] | |
| current_table: Optional[Table] | |
| try: | |
| hive_table = self._get_hive_table(open_client, database_name, table_name) | |
| current_table = self._convert_hive_into_iceberg(hive_table) | |
| except NoSuchTableError: | |
| hive_table = None | |
| current_table = None | |
| updated_staged_table = self._update_and_stage_table(current_table, table_request) | |
| if current_table and updated_staged_table.metadata == current_table.metadata: | |
| # no changes, do nothing | |
| return CommitTableResponse(metadata=current_table.metadata, metadata_location=current_table.metadata_location) | |
| self._write_metadata( | |
| metadata=updated_staged_table.metadata, | |
| io=updated_staged_table.io, | |
| metadata_path=updated_staged_table.metadata_location, | |
| ) | |
| if hive_table and current_table: | |
| # Table exists, update it. | |
| hive_table.parameters = _construct_parameters( | |
| metadata_location=updated_staged_table.metadata_location, | |
| previous_metadata_location=current_table.metadata_location, | |
| ) | |
| open_client.alter_table(dbname=database_name, tbl_name=table_name, new_tbl=hive_table) | |
| else: | |
| # Table does not exist, create it. | |
| hive_table = self._convert_iceberg_into_hive( | |
| StagedTable( | |
| identifier=(self.name, database_name, table_name), | |
| metadata=updated_staged_table.metadata, | |
| metadata_location=updated_staged_table.metadata_location, | |
| io=updated_staged_table.io, | |
| catalog=self, | |
| ) | |
| ) | |
| self._create_hive_table(open_client, hive_table) | |
| except WaitingForLockException as e: | |
| raise CommitFailedException(f"Failed to acquire lock for {table_request.identifier}, state: {lock.state}") from e | |
| finally: | |
| open_client.unlock(UnlockRequest(lockid=lock.lockid)) | |
| return CommitTableResponse( | |
| metadata=updated_staged_table.metadata, metadata_location=updated_staged_table.metadata_location | |
| ) | |
| def load_table(self, identifier: Union[str, Identifier]) -> Table: | |
| """Load the table's metadata and return the table instance. | |
| You can also use this method to check for table existence using 'try catalog.table() except TableNotFoundError'. | |
| Note: This method doesn't scan data stored in the table. | |
| Args: | |
| identifier: Table identifier. | |
| Returns: | |
| Table: the table instance with its metadata. | |
| Raises: | |
| NoSuchTableError: If a table with the name does not exist, or the identifier is invalid. | |
| """ | |
| identifier_tuple = self.identifier_to_tuple_without_catalog(identifier) | |
| database_name, table_name = self.identifier_to_database_and_table(identifier_tuple, NoSuchTableError) | |
| with self._client as open_client: | |
| hive_table = self._get_hive_table(open_client, database_name, table_name) | |
| return self._convert_hive_into_iceberg(hive_table) | |
| def drop_table(self, identifier: Union[str, Identifier]) -> None: | |
| """Drop a table. | |
| Args: | |
| identifier: Table identifier. | |
| Raises: | |
| NoSuchTableError: If a table with the name does not exist, or the identifier is invalid. | |
| """ | |
| identifier_tuple = self.identifier_to_tuple_without_catalog(identifier) | |
| database_name, table_name = self.identifier_to_database_and_table(identifier_tuple, NoSuchTableError) | |
| try: | |
| with self._client as open_client: | |
| open_client.drop_table(dbname=database_name, name=table_name, deleteData=False) | |
| except NoSuchObjectException as e: | |
| # When the namespace doesn't exist, it throws the same error | |
| raise NoSuchTableError(f"Table does not exists: {table_name}") from e | |
| def purge_table(self, identifier: Union[str, Identifier]) -> None: | |
| # This requires to traverse the reachability set, and drop all the data files. | |
| raise NotImplementedError("Not yet implemented") | |
| def rename_table(self, from_identifier: Union[str, Identifier], to_identifier: Union[str, Identifier]) -> Table: | |
| """Rename a fully classified table name. | |
| Args: | |
| from_identifier: Existing table identifier. | |
| to_identifier: New table identifier. | |
| Returns: | |
| Table: the updated table instance with its metadata. | |
| Raises: | |
| ValueError: When from table identifier is invalid. | |
| NoSuchTableError: When a table with the name does not exist. | |
| NoSuchNamespaceError: When the destination namespace doesn't exist. | |
| """ | |
| from_identifier_tuple = self.identifier_to_tuple_without_catalog(from_identifier) | |
| from_database_name, from_table_name = self.identifier_to_database_and_table(from_identifier_tuple, NoSuchTableError) | |
| to_database_name, to_table_name = self.identifier_to_database_and_table(to_identifier) | |
| try: | |
| with self._client as open_client: | |
| tbl = open_client.get_table(dbname=from_database_name, tbl_name=from_table_name) | |
| tbl.dbName = to_database_name | |
| tbl.tableName = to_table_name | |
| open_client.alter_table(dbname=from_database_name, tbl_name=from_table_name, new_tbl=tbl) | |
| except NoSuchObjectException as e: | |
| raise NoSuchTableError(f"Table does not exist: {from_table_name}") from e | |
| except InvalidOperationException as e: | |
| raise NoSuchNamespaceError(f"Database does not exists: {to_database_name}") from e | |
| return self.load_table(to_identifier) | |
| def create_namespace(self, namespace: Union[str, Identifier], properties: Properties = EMPTY_DICT) -> None: | |
| """Create a namespace in the catalog. | |
| Args: | |
| namespace: Namespace identifier. | |
| properties: A string dictionary of properties for the given namespace. | |
| Raises: | |
| ValueError: If the identifier is invalid. | |
| AlreadyExistsError: If a namespace with the given name already exists. | |
| """ | |
| database_name = self.identifier_to_database(namespace) | |
| hive_database = HiveDatabase(name=database_name, parameters=properties) | |
| try: | |
| with self._client as open_client: | |
| open_client.create_database(_annotate_namespace(hive_database, properties)) | |
| except AlreadyExistsException as e: | |
| raise NamespaceAlreadyExistsError(f"Database {database_name} already exists") from e | |
| def drop_namespace(self, namespace: Union[str, Identifier]) -> None: | |
| """Drop a namespace. | |
| Args: | |
| namespace: Namespace identifier. | |
| Raises: | |
| NoSuchNamespaceError: If a namespace with the given name does not exist, or the identifier is invalid. | |
| NamespaceNotEmptyError: If the namespace is not empty. | |
| """ | |
| database_name = self.identifier_to_database(namespace, NoSuchNamespaceError) | |
| try: | |
| with self._client as open_client: | |
| open_client.drop_database(database_name, deleteData=False, cascade=False) | |
| except InvalidOperationException as e: | |
| raise NamespaceNotEmptyError(f"Database {database_name} is not empty") from e | |
| except MetaException as e: | |
| raise NoSuchNamespaceError(f"Database does not exists: {database_name}") from e | |
| def list_tables(self, namespace: Union[str, Identifier]) -> List[Identifier]: | |
| """List tables under the given namespace in the catalog (including non-Iceberg tables). | |
| When the database doesn't exist, it will just return an empty list. | |
| Args: | |
| namespace: Database to list. | |
| Returns: | |
| List[Identifier]: list of table identifiers. | |
| Raises: | |
| NoSuchNamespaceError: If a namespace with the given name does not exist, or the identifier is invalid. | |
| """ | |
| database_name = self.identifier_to_database(namespace, NoSuchNamespaceError) | |
| with self._client as open_client: | |
| return [(database_name, table_name) for table_name in open_client.get_all_tables(db_name=database_name)] | |
| def list_namespaces(self, namespace: Union[str, Identifier] = ()) -> List[Identifier]: | |
| """List namespaces from the given namespace. If not given, list top-level namespaces from the catalog. | |
| Returns: | |
| List[Identifier]: a List of namespace identifiers. | |
| """ | |
| # Hierarchical namespace is not supported. Return an empty list | |
| if namespace: | |
| return [] | |
| with self._client as open_client: | |
| return list(map(self.identifier_to_tuple, open_client.get_all_databases())) | |
| def load_namespace_properties(self, namespace: Union[str, Identifier]) -> Properties: | |
| """Get properties for a namespace. | |
| Args: | |
| namespace: Namespace identifier. | |
| Returns: | |
| Properties: Properties for the given namespace. | |
| Raises: | |
| NoSuchNamespaceError: If a namespace with the given name does not exist, or identifier is invalid. | |
| """ | |
| database_name = self.identifier_to_database(namespace, NoSuchNamespaceError) | |
| try: | |
| with self._client as open_client: | |
| database = open_client.get_database(name=database_name) | |
| properties = database.parameters | |
| properties[LOCATION] = database.locationUri | |
| if comment := database.description: | |
| properties[COMMENT] = comment | |
| return properties | |
| except NoSuchObjectException as e: | |
| raise NoSuchNamespaceError(f"Database does not exists: {database_name}") from e | |
| def update_namespace_properties( | |
| self, namespace: Union[str, Identifier], removals: Optional[Set[str]] = None, updates: Properties = EMPTY_DICT | |
| ) -> PropertiesUpdateSummary: | |
| """Remove provided property keys and update properties for a namespace. | |
| Args: | |
| namespace: Namespace identifier. | |
| removals: Set of property keys that need to be removed. Optional Argument. | |
| updates: Properties to be updated for the given namespace. | |
| Raises: | |
| NoSuchNamespaceError: If a namespace with the given name does not exist | |
| ValueError: If removals and updates have overlapping keys. | |
| """ | |
| self._check_for_overlap(updates=updates, removals=removals) | |
| database_name = self.identifier_to_database(namespace, NoSuchNamespaceError) | |
| with self._client as open_client: | |
| try: | |
| database = open_client.get_database(database_name) | |
| parameters = database.parameters | |
| except NoSuchObjectException as e: | |
| raise NoSuchNamespaceError(f"Database does not exists: {database_name}") from e | |
| removed: Set[str] = set() | |
| updated: Set[str] = set() | |
| if removals: | |
| for key in removals: | |
| if key in parameters: | |
| parameters[key] = None | |
| removed.add(key) | |
| if updates: | |
| for key, value in updates.items(): | |
| parameters[key] = value | |
| updated.add(key) | |
| open_client.alter_database(database_name, _annotate_namespace(database, parameters)) | |
| expected_to_change = (removals or set()).difference(removed) | |
| return PropertiesUpdateSummary(removed=list(removed or []), updated=list(updated or []), missing=list(expected_to_change)) | |