Pandas Write table to MySQL: “unable to rollback”

Question

I need help to get this working. I have a pd.DataFrame (df), which I need to load to a MySQL database. I don\'t understand what the error message means and how

Answer 1

When using sqlalchemy, you should pass the engine and not the raw connection:

engine = create_engine("mysql+mysqldb://...")
df.to_sql('demand_forecast_t', engine, if_exists='replace', index=False)

Writing to MySQL without sqlalchemy (so with specifying flavor='mysql') is deprecated.

When the problem is that you have a too large frame to write at once, you can use the chunksize keyword (see the docstring). Eg:

df.to_sql('demand_forecast_t', engine, if_exists='replace', chunksize=10000)