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Improve change detection in mysql_variables

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mysql_variables bindly executes a SET var = value query even when
the variable already has the requested value.

With this patch the query is executed only if the current value is
different to the requested one.
This commit is contained in:
Maykel Moya 2013-10-17 19:13:58 +02:00
parent 8a516d1479
commit b90a250165
1 changed files with 4 additions and 2 deletions
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6
library/database/mysql_variables
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@ -197,10 +197,12 @@ def main():
module.fail_json(msg="unable to connect to database, check login_user and login_password are correct or ~/.my.cnf has the credentials")
if mysqlvar is None:
module.fail_json(msg="Cannot run without variable to operate with")
if value is None and mysqlvar is not None:
mysqlvar_val = getvariable(cursor, mysqlvar)
mysqlvar_val = getvariable(cursor, mysqlvar)
if value is None:
module.exit_json(msg=mysqlvar_val)
else:
if value == mysqlvar_val[0][1]:
module.exit_json(msg="Variable already set to requested value", changed=False)
result = setvariable(cursor, mysqlvar, value)
if result is True:
module.exit_json(msg="Variable change succeeded", changed=True)