Không thể tải dữ liệu từ tệp vào bảng Oracle bằng executeMany ()

Với tệp dữ liệu thử nghiệm này:

1|Fred|Nurke|21|UK
2|Henry|Crun|21|UK

mã này hoạt động:

import logging
import cx_Oracle
import csv
import sys
import os

if sys.platform.startswith("darwin"):
    cx_Oracle.init_oracle_client(lib_dir=os.environ.get("HOME")+"/Downloads/instantclient_19_8")

insertQuery="insert into test (id,name,surname,age,country) values (:1, :2, :3, :4, :5)"
oracleconnection = 'un/[email protected]/orclpdb1'
my_separator='|'
file_name = 'demo_2021.csv'

try:
    con=cx_Oracle.connect(oracleconnection)
    cur=con.cursor()

    # Predefine the memory areas to match the table definition
    cur.setinputsizes(None, 50, 50, None, 50)

    # Adjust the batch size to meet your memory and performance requirements
    batch_size = 10000

    with open(file_name, 'r') as csv_file:
        csv_reader = csv.reader(csv_file, delimiter=my_separator)
        data = []
        for line in csv_reader:
            data.append((line[0], line[1], line[2], line[3], line[4]))
            if len(data) % batch_size == 0:
                cur.executemany(sql, data)
                data = []
        if data:
            cur.executemany(insertQuery, data)
        con.commit()

        
except Exception as er:
    print(er)

Trong SQL * Plus sau đó:

  ID NAME  SURNAME AGE COUNTRY
---- ----- ------- --- -------
   1 Fred  Nurke    21 UK
   2 Henry Crun     21 UK