Transactional and non-transactional data for maintaining session state

One or more non-transitory storage media storing instructions which, when executed by one or more computing devices, cause performance of a method comprising:

• a server instance receiving, from a client in a session between the server instance and the client, a request to execute:
• one or more transactional commands that, when executed, cause changes to a database, and
• one or more non-transactional commands that, when executed, do not cause changes to the database;
• the server instance sending, to the client, at least one first directive executable at the client to store, in a first set of information, one or more first items representing one or more particular transactional commands that are open but not yet committed in the session, wherein the first set of information is maintained at the client separately from a second set of information comprising one or more second items representing one or more particular non-transactional commands that have been processed in the session;
• and
• based at least in part on determining that the one or more particular transactional commands have committed in the session, the server instance sending, to the client in the session, at least one second directive executable at the client to purge, from the first set of information, the one or more first items that represent the one or more particular transactional commands without purging, from the second set of information, the one or more second items that represent the one or more particular non-transactional commands.