SQL Alchemy无法在事务块内运行 [英] Sql Alchemy cannot run inside a transaction block

问题描述

我正在尝试通过python脚本在redshift中运行查询，但出现错误:

I'm trying to run a query in redshift from a python script, but I'm getting error:

sqlalchemy.exc.InternalError: (psycopg2.InternalError) ALTER EXTERNAL TABLE cannot run inside a transaction block

这是我的代码:

engine = create_engine(SQL_ENGINE % urlquote(REDSHIFT_PASS))
partition_date = (date.today() - timedelta(day)).strftime("%Y%m%d")
query = """alter table  {table_name} add partition (dt={date_partition}) location 's3://dft-dwh-files/raw_data/google_analytics/revenue_per_channel/{date_partition}/';""".format(date_partition=partition_date,table_name=table_name)
conn = engine.connect()
conn.execute(query).execution_options(autocommit=True)

我该如何解决?

推荐答案

对于PostgreSQL，您需要设置

For PostgreSQL, you need to set the isolation level to AUTOCOMMIT, not the SQLAlchemy autocommit:

conn.execution_options(isolation_level="AUTOCOMMIT").execute(query)

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