Question

我基本上希望将数据帧写入SQL对象表，并将其外键映射到另一个表的主键，并使用下面的代码执行此操作。但是，我在行sqlalchemy.exc.DBAPIError: (pyodbc.Error) ('HY000', '[HY000] [Microsoft][ODBC SQL Server Driver]Connection is busy with results for another hstmt (0)中收到错误connection.execute(yc_node_hist.__table__.insert(),fk_yc_update = listofindices3[i],curve_date = row1['Date'], tenor_years = row1['Maturity'], yield_pct = row1['Yield_pct'])。我在下面的代码之前在其他表中执行session.add_all()序列。

#Retrieving the primary key for yc_update to set as foreign key for yc_node_hist
session.flush()
session.commit()
session = Session(bind=engine, expire_on_commit=False)
listofindices3 = []

connection = engine.connect()
trans = connection.begin()
#Function to write a dataframe into SQL
def writingtosql_yc_node_hist(df):
    i = 0
    for (i1, row1), (i2, row2) in pairwise(df.iterrows()):
        # take first item from row_iterator
        if row1['Currency'] == row2['Currency']:
            r1 = connection.execute(yc_node_hist.__table__.select())
            connection.execute(yc_node_hist.__table__.insert(),fk_yc_update = listofindices3[i],curve_date = row1['Date'], tenor_years = row1['Maturity'], yield_pct = row1['Yield_pct'])                                
        else:
            i = i + 1
            r1 = connection.execute(yc_node_hist.__table__.select())
            connection.execute(yc_node_hist.__table__.insert(),fk_yc_update = listofindices3[i],curve_date = row1['Date'], tenor_years = row1['Maturity'], yield_pct = row1['Yield_pct'])   
            trans.commit()    

writingtosql_yc_node_hist(combined_datafinal)
trans.close()

连接忙于另一个hstmt错误的结果（SQLAlchemy）

0 个答案: