Question

我有以下代码将文件名插入名为'logs'的Postgres表

c = engine.connect()
conn = c.connection
cur = conn.cursor()

cur.execute("SELECT filename from logs" )
rows1 = cur.fetchall()
rows1 = [x[0] for x in rows1]

for root, directories, filenames in os.walk(path):
    for filename in filenames:
        fname = os.path.join(root,filename)
        if os.path.isfile(fname) and fname[-4:] == '.log':
            if fname not in rows1:
            print fname
            cur.execute(""" INSERT INTO logs(filename) VALUES (%(fname)s)""")
            conn.commit()

我收到错误

ProgrammingError: syntax error at or near "%"
LINE 1:  INSERT INTO logs(filename) VALUES (%(fname)s)

我可以知道我做错了吗？

Answer 1

您尚未将任何参数传递给查询，因此不会进行替换;适配器将文字字符串(%(fname)s)传递给Postgres。

cur.execute("""INSERT INTO logs(filename) VALUES (%(fname)s)""", {'fname': fname'})

将文件名插入Postgres表

1 个答案: