PyMySQL unable to execute multiple queries

Question

Using the latest version of PyMySQL(0.9.3) I am unable to execute a query string which has multiple SQL statements in it separated by a semicolon(;)

My python version is: Python 3.6.5

import pymysql # version 0.9.3
conn = {
    "host": "mysql_server_hostname",
    "password": "my_password",
    "port": <<port_no>>,
    "user": "my_username"
}

my_query_str = 'show databases;use random_existing_db;'
with pymysql.connect(**conn):
    cur.execute(query)

Error returned: (1064, 'Multiple statements detected in a single query)

Tried running the same query with PyMySQL-0.7.11 and it works

Answer 1

In pymysql version 0.8 onwards client flag is no longer set by default. For executing multiple statements one needs to pass client_flag=CLIENT.MULTI_STATEMENTS.

reference: https://github.com/PyMySQL/PyMySQL/blob/v0.9.3/CHANGELOG#L66

Example of the fix below.

import pymysql
from pymysql.constants import CLIENT

conn = {
    "host": "mysql_server_hostname",
    "password": "my_password",
    "port": <<port_no>>,
    "user": "my_username",
    "client_flag": CLIENT.MULTI_STATEMENTS
}

my_query_str = 'show databases;use random_existing_db;'
with pymysql.connect(**conn) as cur:
    cur.execute(my_query_str)

Answer 2

That's right, I used the client_flag = CLIENT.MULTI_STATEMENTS parameter to take effect.