您将如何使用 python 执行多个 SQL 语句(脚本模式)?
试图做这样的事情:
import MySQLdb
mysql = MySQLdb.connect(host='host...rds.amazonaws.com', db='dbName', user='userName', passwd='password')
sql = """
insert into rollout.version (`key`, `value`) VALUES ('maxim0', 'was here0');
insert into rollout.version (`key`, `value`) VALUES ('maxim1', 'was here1');
insert into rollout.version (`key`, `value`) VALUES ('maxim2', 'was here1');
"""
mysql.query(sql)
失败:
ProgrammingError:(2014,“命令不同步;您现在无法运行此命令”)
我正在编写一个部署引擎,它将接受来自几个人的 SQL 增量更改并将它们应用于版本部署的数据库。
我查看了这段代码http://sujitpal.blogspot.com/2009/02/python-sql-runner.html并实现了__sanitize_sql:
def __sanitize_sql(sql):
# Initial implementation from http://sujitpal.blogspot.com/2009/02/python-sql-runner.html
sql_statements = []
incomment = False
in_sqlcollect = False
sql_statement = None
for sline in sql.splitlines():
# Remove white space from both sides.
sline = sline.strip()
if sline.startswith("--") or len(sline) == 0:
# SQL Comment line, skip
continue
if sline.startswith("/*"):
# start of SQL comment block
incomment = True
if incomment and sline.endswith("*/"):
# end of SQL comment block
incomment = False
continue
# Collect line which is part of
if not incomment:
if sql_statement is None:
sql_statement = sline
else:
sql_statement += sline
if not sline.endswith(";"):
in_sqlcollect = True
if not in_sqlcollect:
sql_statements.append(sql_statement)
sql_statement = None
in_sqlcollect = False
if not incomment and not sql_statement is None and len(sql_statement) != 0:
sql_statements.append(sql_statement)
return sql_statements
if __name__ == "__main__":
sql = sql = """update tbl1;
/* This
is my
beautiful
comment*/
/*this is comment #2*/
some code...;
-- comment
sql code
"""
print __sanitize_sql(sql)
不知道这是否是最好的解决方案,但似乎对解析 SQL 语句不太复杂。
现在的问题是如何运行这段代码,我可以做类似这个家伙的事情,但它看起来很难看,我不是 python 专家(过去两周我们一直在这里做 python)但似乎滥用光标这个方式是hackish,不是一个好习惯。
想法/博客文章会有所帮助。
谢谢你,
马克西姆。