143 lines
5.4 KiB
Python
143 lines
5.4 KiB
Python
import pandas as pd
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import sqlalchemy
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from sqlalchemy import create_engine
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import configparser
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import os
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from urllib.parse import quote_plus
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from datetime import datetime
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def fix_date(date_str):
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try:
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# 处理只有年月的情况（如"2018-07"）
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if isinstance(date_str, str) and len(date_str) == 7 and date_str[4] == '-':
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return datetime.strptime(date_str + '-01', '%Y-%m-%d')
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return date_str
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except:
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return None # 对于无法解析的日期返回NULL
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def get_db_connection_string(config, section):
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"""从配置文件中构建数据库连接字符串"""
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return f"mysql+pymysql://{config[section]['user']}:{quote_plus(config[section]['password'])}@" \
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f"{config[section]['host']}:{config[section]['port']}/{config[section]['database']}"
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def transform_and_load_ma_type(config_file_path):
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"""
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从源数据库提取ma_type数据，转换后加载到目标数据库ma_type
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:param config_file_path: 配置文件路径
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"""
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# 读取配置文件
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if not os.path.exists(config_file_path):
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raise FileNotFoundError(f"配置文件不存在: {config_file_path}")
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config = configparser.ConfigParser()
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config.read(config_file_path)
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try:
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# 获取数据库连接
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source_conn_str = get_db_connection_string(config, 'source_db')
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target_conn_str = get_db_connection_string(config, 'target_db')
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source_engine = create_engine(source_conn_str)
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target_engine = create_engine(target_conn_str)
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# 从源表读取数据（过滤COMPANY_ID=1且IS_ACTIVE=1的记录）
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print("正在从源表ma_type读取数据...")
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source_query = """
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SELECT ID, \
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PARENT_ID, \
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NAME, \
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LEVEL, \
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UNIT, \
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NUM, \
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nullif(BUY_PRICE,0) as BUY_PRICE, \
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nullif(LEASE_PRICE,0) as LEASE_PRICE, \
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IS_COUNT, \
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RATED_LOAD, \
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TEST_LOAD, \
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HOLDING_TIME, \
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manage_type,
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nullif(IS_TEST,0) as IS_TEST,
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nullif(TIME,0) as TIME
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FROM ma_type
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WHERE COMPANY_ID = 1 AND IS_ACTIVE = 1 \
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"""
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source_df = pd.read_sql(source_query, source_engine)
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if source_df.empty:
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print("没有符合条件的数据需要转换")
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return
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print(f"读取到{len(source_df)}条待转换数据")
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# 数据转换（直接字段复制）
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print("正在进行数据转换...")
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target_df = pd.DataFrame()
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# 字段映射（源字段 → 目标字段）
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field_mapping = {
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'ID': 'type_id',
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'PARENT_ID': 'parent_id',
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'NAME': 'type_name',
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'LEVEL': 'level',
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'UNIT': 'unit_name',
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'NUM': 'storage_num',
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'BUY_PRICE': 'buy_price',
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'LEASE_PRICE': 'lease_price',
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'IS_COUNT': 'manage_type',
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'RATED_LOAD': 'rated_load',
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'TEST_LOAD': 'test_load',
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'HOLDING_TIME': 'holding_time',
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'manage_type': 'is_enter',
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'IS_TEST': 'is_test',
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'TIME': 'create_time'
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}
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for source_field, target_field in field_mapping.items():
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target_df[target_field] = source_df[source_field]
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# 应用日期修正
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target_df['create_time'] = source_df['TIME'].apply(fix_date)
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# 写入目标表
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print("正在写入目标表ma_type...")
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target_df.to_sql(
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'ma_type',
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target_engine,
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if_exists='append',
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index=False,
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dtype={
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'type_id': sqlalchemy.types.INTEGER(),
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'parent_id': sqlalchemy.types.INTEGER(),
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'type_name': sqlalchemy.types.VARCHAR(length=100),
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'level': sqlalchemy.types.SmallInteger(),
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'unit_name': sqlalchemy.types.VARCHAR(length=20),
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'storage_num': sqlalchemy.types.VARCHAR(length=50),
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'buy_price': sqlalchemy.types.DECIMAL(10, 2),
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'lease_price': sqlalchemy.types.DECIMAL(10, 2),
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'manage_type': sqlalchemy.types.SmallInteger(),
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'rated_load': sqlalchemy.types.DECIMAL(10, 2),
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'test_load': sqlalchemy.types.DECIMAL(10, 2),
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'holding_time': sqlalchemy.types.INTEGER(),
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'is_enter': sqlalchemy.types.SmallInteger(),
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'is_test': sqlalchemy.types.SmallInteger(),
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'create_time': sqlalchemy.types.DateTime()
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}
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)
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print(f"成功写入{len(target_df)}条数据")
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except Exception as e:
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print(f"处理过程中发生错误: {str(e)}")
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raise
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finally:
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if 'source_engine' in locals():
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source_engine.dispose()
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if 'target_engine' in locals():
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target_engine.dispose()
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if __name__ == "__main__":
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# 配置文件路径（根据实际情况修改）
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config_file = "config.ini"
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try:
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transform_and_load_ma_type(config_file)
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except Exception as e:
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print(f"程序执行失败: {str(e)}") |