PyMySQL - 使用字符串作为 cursor.execute 参数
PyMySQL - Using a string as cursor.execute argument
我的问题是在cursor.execute
下面传递一个字符串
import pymsyql
import json
connection = pymysql.connect(
host='localhost', user='u_u_u_u_u',
password='passwd', db='test',
charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor
)
def get_data(table):
try:
with connection.cursor() as cursor:
sql = """
SELECT * FROM %s;
"""
cursor.execute(sql, (table,))
result = cursor.fetchall()
return json.dumps([dict(ix) for ix in result])
except (TypeError, pymysql.err.ProgrammingError) as error:
print(error)
finally:
pass
get_data('table_1')
connection.close()
我收到错误
pymysql.err.ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''table_1'' at line 1")
似乎 execute
不希望将字符串作为参数传递;当我直接输入字符串时,如 cursor.execute(sql, ('table_1',))
,我得到同样的错误。
我对导致问题的原因感到困惑,双引号 ''table_1''
令人困惑。谁能告诉我这是怎么回事?
您不能将 table 名称作为参数传递,唉。您必须将其合并到查询字符串中:
sql = """
SELECT * FROM `{0}`;
""".format(table)
cursor.execute(sql)
我的问题是在cursor.execute
下面传递一个字符串
import pymsyql
import json
connection = pymysql.connect(
host='localhost', user='u_u_u_u_u',
password='passwd', db='test',
charset='utf8mb4', cursorclass=pymysql.cursors.DictCursor
)
def get_data(table):
try:
with connection.cursor() as cursor:
sql = """
SELECT * FROM %s;
"""
cursor.execute(sql, (table,))
result = cursor.fetchall()
return json.dumps([dict(ix) for ix in result])
except (TypeError, pymysql.err.ProgrammingError) as error:
print(error)
finally:
pass
get_data('table_1')
connection.close()
我收到错误
pymysql.err.ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''table_1'' at line 1")
似乎 execute
不希望将字符串作为参数传递;当我直接输入字符串时,如 cursor.execute(sql, ('table_1',))
,我得到同样的错误。
我对导致问题的原因感到困惑,双引号 ''table_1''
令人困惑。谁能告诉我这是怎么回事?
您不能将 table 名称作为参数传递,唉。您必须将其合并到查询字符串中:
sql = """
SELECT * FROM `{0}`;
""".format(table)
cursor.execute(sql)