HI
I have following code,
@db_error_handler
def execute_query(self, query_str, data=None):
'''Execute DB query and retry for common DB interaction errors'''
errors_concerned = [1213, 1205, 2013, 2006]
attempts = 1
while(True):
try:
result = self.session.execute(query_str, data)
#result.close() : Trying to commonize insert/select
self.session.commit()
return result
except OperationalError as oe:
self.session.rollback()
if oe.orig[0] in errors_concerned:
if attempts <= 3:
logger.error("Error occured in attempts %s: %s" %
(attempts, oe.orig))
time.sleep(2 * attempts)
attempts += 1
continue
else:
logger.error("Error occured, attempts exhausted %s:
%s" % (attempts, oe.orig))
break
else:
raise
I am constructing the queries outside and passing to this function. I want
to return result in case of select queries. But I can not do that if I call
result.close() before returning. Without closing the result, insert queries
have a problem.
ERROR: DB operation failure: (ProgrammingError) (2014, "Commands out of
sync; you can't run this command now") None None
So I was thinking of using
is_insert¶
<http://docs.sqlalchemy.org/en/rel_0_7/core/connections.html#sqlalchemy.engine.base.ResultProxy.is_insert>
True if this ResultProxy
<http://docs.sqlalchemy.org/en/rel_0_7/core/connections.html#sqlalchemy.engine.base.ResultProxy>
is the result of a executing an expression language compiled
expression.insert()
<http://docs.sqlalchemy.org/en/rel_0_7/core/expression_api.html#sqlalchemy.sql.expression.insert>
construct.
When True, this implies that the inserted_primary_key
<http://docs.sqlalchemy.org/en/rel_0_7/core/connections.html#sqlalchemy.engine.base.ResultProxy.inserted_primary_key>
attribute is accessible, assuming the statement did not include a user
defined “returning” construct.
to check if the query resulted in insert and then call close skip otherwise
? Is it ok from semantic point of view ? Also will it result it
inconsistent connection state or connections ?
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