Aurora Serverless MySQL支持两种一致性读写模式:隔离读和可序列化读。下面是使用代码示例来解释这两种模式的方法。
import pymysql
# 创建与Aurora Serverless MySQL的连接
conn = pymysql.connect(
host='your-aurora-host',
port=your-aurora-port,
user='your-aurora-username',
password='your-aurora-password',
db='your-aurora-database',
cursorclass=pymysql.cursors.DictCursor
)
# 设置隔离级别为READ COMMITTED
conn.cursor().execute("SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED")
# 执行读操作
with conn.cursor() as cursor:
sql = "SELECT * FROM your-table"
cursor.execute(sql)
result = cursor.fetchall()
print(result)
# 关闭连接
conn.close()
import pymysql
# 创建与Aurora Serverless MySQL的连接
conn = pymysql.connect(
host='your-aurora-host',
port=your-aurora-port,
user='your-aurora-username',
password='your-aurora-password',
db='your-aurora-database',
cursorclass=pymysql.cursors.DictCursor
)
# 设置隔离级别为SERIALIZABLE
conn.cursor().execute("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE")
# 执行读操作
with conn.cursor() as cursor:
sql = "SELECT * FROM your-table"
cursor.execute(sql)
result = cursor.fetchall()
print(result)
# 关闭连接
conn.close()
以上是使用Python的pymysql库来连接和执行SQL操作的示例代码。您需要将代码中的your-aurora-host
,your-aurora-port
,your-aurora-username
,your-aurora-password
和your-aurora-database
替换为相应的Aurora Serverless MySQL的连接信息。