zhutong6688 commented on code in PR #32556: URL: https://github.com/apache/superset/pull/32556#discussion_r1986525044
########## superset/db_engine_specs/odps.py: ########## @@ -0,0 +1,192 @@ +# 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 __future__ import annotations + +import logging +from typing import Any, Optional, TYPE_CHECKING + +from sqlalchemy import select, text +from sqlalchemy.engine.base import Engine + +from superset.databases.schemas import ( + TableMetadataColumnsResponse, + TableMetadataResponse, +) +from superset.databases.utils import ( + get_col_type, + get_foreign_keys_metadata, + get_indexes_metadata, +) +from superset.db_engine_specs.base import BaseEngineSpec, BasicParametersMixin +from superset.sql.parse import Partition, SQLScript +from superset.sql_parse import Table +from superset.superset_typing import ResultSetColumnType + +if TYPE_CHECKING: + from superset.models.core import Database + +logger = logging.getLogger(__name__) + + +class OdpsBaseEngineSpec(BaseEngineSpec): + @classmethod + def get_table_metadata( + cls, + database: Database, + table: Table, + partition: Optional[Partition] = None, + ) -> TableMetadataResponse: + """ + Returns basic table metadata + :param database: Database instance + :param table: A Table instance + :param partition: A Table partition info + :return: Basic table metadata + """ + return cls.get_table_metadata(database, table, partition) + + +class OdpsEngineSpec(BasicParametersMixin, OdpsBaseEngineSpec): + default_driver = "odps" + + @classmethod + def get_table_metadata( + cls, database: Any, table: Table, partition: Optional[Partition] = None + ) -> TableMetadataResponse: + """ + Get table metadata information, including type, pk, fks. + This function raises SQLAlchemyError when a schema is not found. + + :param partition: The table's partition info + :param database: The database model + :param table: Table instance + :return: Dict table metadata ready for API response + """ + keys = [] + columns = database.get_columns(table) + primary_key = database.get_pk_constraint(table) + if primary_key and primary_key.get("constrained_columns"): + primary_key["column_names"] = primary_key.pop("constrained_columns") + primary_key["type"] = "pk" + keys += [primary_key] + foreign_keys = get_foreign_keys_metadata(database, table) + indexes = get_indexes_metadata(database, table) + keys += foreign_keys + indexes + payload_columns: list[TableMetadataColumnsResponse] = [] + table_comment = database.get_table_comment(table) + for col in columns: + dtype = get_col_type(col) + payload_columns.append( + { + "name": col["column_name"], + "type": dtype.split("(")[0] if "(" in dtype else dtype, + "longType": dtype, + "keys": [ + k for k in keys if col["column_name"] in k["column_names"] + ], + "comment": col.get("comment"), + } + ) + + with database.get_sqla_engine( + catalog=table.catalog, schema=table.schema + ) as engine: + return { + "name": table.table, + "columns": payload_columns, + "selectStar": cls.select_star( + database=database, + table=table, + engine=engine, + limit=100, + show_cols=False, + indent=True, + latest_partition=True, + cols=columns, + partition=partition, + ), + "primaryKey": primary_key, + "foreignKeys": foreign_keys, + "indexes": keys, + "comment": table_comment, + } + + @classmethod + def select_star( # pylint: disable=too-many-arguments + cls, + database: Database, + table: Table, + engine: Engine, + limit: int = 100, + show_cols: bool = False, + indent: bool = True, + latest_partition: bool = True, + cols: list[ResultSetColumnType] | None = None, + partition: Optional[Partition] = None, + ) -> str: + """ + Generate a "SELECT * from [schema.]table_name" query with appropriate limit. + + WARNING: expects only unquoted table and schema names. + + :param partition: The table's partition info + :param database: Database instance + :param table: Table instance + :param engine: SqlAlchemy Engine instance + :param limit: limit to impose on query + :param show_cols: Show columns in query; otherwise use "*" + :param indent: Add indentation to query + :param latest_partition: Only query the latest partition + :param cols: Columns to include in query + :return: SQL query + """ + # pylint: disable=redefined-outer-name + fields: str | list[Any] = "*" + cols = cols or [] + if (show_cols or latest_partition) and not cols: + cols = database.get_columns(table) Review Comment: When show_comls or latest_partition is true and cols is None, it is necessary to retrieve the cols value again -- This is an automated message from the Apache Git Service. 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