dhruv-pratap commented on code in PR #4706: URL: https://github.com/apache/iceberg/pull/4706#discussion_r873987355
########## python/src/iceberg/catalog/base.py: ########## @@ -0,0 +1,223 @@ +# 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. + +from abc import ABC, abstractmethod +from typing import Dict, List, Optional, Tuple + +from iceberg.schema import Schema +from iceberg.table.base import PartitionSpec, Table + + +class Catalog(ABC): + """Base Catalog for table operations like - create, drop, load, list and others. + + Attributes: + name(str): Name of the catalog + properties(Dict[str, str]): Catalog properties + """ + + def __init__(self, name: str, properties: Dict[str, str]): + self._name = name + self._properties = properties + + @property + def name(self) -> str: + return self._name + + @property + def properties(self) -> Dict[str, str]: + return self._properties + + @abstractmethod + def create_table( + self, + *, + namespace: Tuple[str, ...], + name: str, + schema: Schema, + location: Optional[str] = None, + partition_spec: Optional[PartitionSpec] = None, + properties: Optional[Dict[str, str]] = None, + ) -> Table: + """Create a table + + Args: + namespace: A tuple of table's namespace levels. Ex: ('com','org','dept') + name: Table name + schema: Table's schema. + location: Location for the table. Optional Argument. + partition_spec: PartitionSpec for the table. Optional Argument. + properties: Table metadata that can be a string based dictionary. Optional Argument. + + Returns: + Table: the created table instance + + Raises: + AlreadyExistsError: If a table with the name already exists + """ + + @abstractmethod + def table(self, namespace: Tuple[str, ...], name: str) -> Table: + """Loads the table's metadata and returns the table instance. + + You can also use this method to check for table existence using 'try catalog.table() except TableNotFoundError' + Note: This method does not load table's data in any form. + + Args: + namespace: A tuple of table's namespace levels. Ex: ('com','org','dept') + name: Table's name. + + Returns: + Table: the table instance with its metadata + + Raises: + TableNotFoundError: If a table with the name does not exist + """ + + @abstractmethod + def drop_table(self, namespace: Tuple[str, ...], name: str, purge: bool = True) -> None: + """Drop a table; Optionally purge all data and metadata files. + + Args: + namespace: A tuple of table's namespace levels. Ex: ('com','org','dept') + name: table name + purge: Defaults to true, which deletes all data and metadata files in the table; Optional Argument + + Raises: + TableNotFoundError: If a table with the name does not exist + """ + + @abstractmethod + def rename_table(self, from_namespace: Tuple[str, ...], from_name: str, to_namespace: Tuple[str, ...], to_name: str) -> Table: + """Rename a fully classified table name + + Args: + from_namespace: Existing table's namespace. A tuple of table's namespace levels. Ex: ('com','org','dept') + from_name: Existing table's name. + to_namespace: New Table namespace to be assigned. Tuple of namespace levels. Ex: ('com','org','new') + to_name: New Table name to be assigned. + + Returns: + Table: the updated table instance with its metadata + + Raises: + TableNotFoundError: If a table with the name does not exist + """ + + @abstractmethod + def replace_table( + self, + *, + namespace: Tuple[str, ...], + name: str, + schema: Schema, + location: Optional[str] = None, + partition_spec: Optional[PartitionSpec] = None, + properties: Optional[Dict[str, str]] = None, + ) -> Table: + """Starts a transaction and replaces the table with the provided spec. Review Comment: Removed in a recent commit. Marking it resolved. ########## python/src/iceberg/catalog/base.py: ########## @@ -0,0 +1,223 @@ +# 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. + +from abc import ABC, abstractmethod +from typing import Dict, List, Optional, Tuple + +from iceberg.schema import Schema +from iceberg.table.base import PartitionSpec, Table + + +class Catalog(ABC): + """Base Catalog for table operations like - create, drop, load, list and others. + + Attributes: + name(str): Name of the catalog + properties(Dict[str, str]): Catalog properties + """ + + def __init__(self, name: str, properties: Dict[str, str]): + self._name = name + self._properties = properties + + @property + def name(self) -> str: + return self._name + + @property + def properties(self) -> Dict[str, str]: + return self._properties + + @abstractmethod + def create_table( + self, + *, Review Comment: Fixed in a recent commit. Marking it resolved. -- This is an automated message from the Apache Git Service. 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