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Refactor TableSession and TableSessionPool of Python client (#14232)
* refector py table session * refector py table session * fix python 3.6 * fix IY * fix table session * Fix CI * fix IT * fix IT * fix IT * builder * fix example * tableSession python
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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. | ||
| # | ||
| from typing import Union | ||
|
|
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| from iotdb.Session import Session | ||
| from iotdb.utils.NumpyTablet import NumpyTablet | ||
| from iotdb.utils.SessionDataSet import SessionDataSet | ||
| from iotdb.utils.Tablet import Tablet | ||
|
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| class TableSessionConfig(object): | ||
|
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| def __init__( | ||
| self, | ||
| node_urls: list = None, | ||
| username: str = Session.DEFAULT_USER, | ||
| password: str = Session.DEFAULT_PASSWORD, | ||
| database: str = None, | ||
| fetch_size: int = 5000, | ||
| time_zone: str = Session.DEFAULT_ZONE_ID, | ||
| enable_redirection: bool = True, | ||
| enable_compression: bool = False, | ||
| ): | ||
| """ | ||
| Initialize a TableSessionConfig object with the provided parameters. | ||
| Parameters: | ||
| node_urls (list, optional): A list of node URLs for the database connection. | ||
| Defaults to ["localhost:6667"]. | ||
| username (str, optional): The username for the database connection. | ||
| Defaults to "root". | ||
| password (str, optional): The password for the database connection. | ||
| Defaults to "root". | ||
| database (str, optional): The target database to connect to. Defaults to None. | ||
| fetch_size (int, optional): The number of rows to fetch per query. Defaults to 5000. | ||
| time_zone (str, optional): The default time zone for the session. | ||
| Defaults to Session.DEFAULT_ZONE_ID. | ||
| enable_redirection (bool, optional): Whether to enable redirection. | ||
| Defaults to False. | ||
| enable_compression (bool, optional): Whether to enable data compression. | ||
| Defaults to False. | ||
| """ | ||
| if node_urls is None: | ||
| node_urls = ["localhost:6667"] | ||
| self.node_urls = node_urls | ||
| self.username = username | ||
| self.password = password | ||
| self.database = database | ||
| self.fetch_size = fetch_size | ||
| self.time_zone = time_zone | ||
| self.enable_redirection = enable_redirection | ||
| self.enable_compression = enable_compression | ||
|
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|
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| class TableSession(object): | ||
|
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| def __init__( | ||
| self, table_session_config: TableSessionConfig = None, session_pool=None | ||
| ): | ||
| self.__session_pool = session_pool | ||
| if self.__session_pool is None: | ||
| self.__session = Session.init_from_node_urls( | ||
| table_session_config.node_urls, | ||
| table_session_config.username, | ||
| table_session_config.password, | ||
| table_session_config.fetch_size, | ||
| table_session_config.time_zone, | ||
| table_session_config.enable_redirection, | ||
| ) | ||
| self.__session.sql_dialect = "table" | ||
| self.__session.database = table_session_config.database | ||
| self.__session.open(table_session_config.enable_compression) | ||
| else: | ||
| self.__session = self.__session_pool.get_session() | ||
|
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| def insert(self, tablet: Union[Tablet, NumpyTablet]): | ||
| """ | ||
| Insert data into the database. | ||
| Parameters: | ||
| tablet (Tablet | NumpyTablet): The tablet containing the data to be inserted. | ||
| Accepts either a `Tablet` or `NumpyTablet`. | ||
| Raises: | ||
| IoTDBConnectionException: If there is an issue with the database connection. | ||
| """ | ||
| self.__session.insert_relational_tablet(tablet) | ||
|
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| def execute_non_query_statement(self, sql: str): | ||
| """ | ||
| Execute a non-query SQL statement. | ||
| Parameters: | ||
| sql (str): The SQL statement to execute. Typically used for commands | ||
| such as INSERT, DELETE, or UPDATE. | ||
| Raises: | ||
| IoTDBConnectionException: If there is an issue with the database connection. | ||
| """ | ||
| self.__session.execute_non_query_statement(sql) | ||
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| def execute_query_statement( | ||
| self, sql: str, timeout_in_ms: int = 0 | ||
| ) -> SessionDataSet: | ||
| """ | ||
| Execute a query SQL statement and return the result set. | ||
| Parameters: | ||
| sql (str): The SQL query to execute. | ||
| timeout_in_ms (int, optional): Timeout for the query in milliseconds. Defaults to 0, | ||
| which means no timeout. | ||
| Returns: | ||
| SessionDataSet: The result set of the query. | ||
| Raises: | ||
| IoTDBConnectionException: If there is an issue with the database connection. | ||
| """ | ||
| return self.__session.execute_query_statement(sql, timeout_in_ms) | ||
|
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| def close(self): | ||
| """ | ||
| Close the session and release resources. | ||
| Raises: | ||
| IoTDBConnectionException: If there is an issue closing the connection. | ||
| """ | ||
| if self.__session_pool is None: | ||
| self.__session.close() | ||
| else: | ||
| self.__session_pool.put_back(self.__session) |
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