Javadoc
Returns true if a flush for any pending transactional operations (when
batching is on) before execution of the function. Normally GemFireXD
distributed functions that do the updates will not require this flag since
local coordinator node will be preferred for any transaction updates for
which the node is a replica.
TODO: TX: Ensure the above and use this flag to skip flush. Right now we
always go to primaries for updates.