citus

Author	SHA1	Message	Date
Andres Freund	fc298ec095	Coordinated remote transaction management.	2016-12-12 15:18:12 -08:00
Andres Freund	6eeb43af15	Add PQgetResult() wrapper handling interrupts. This makes it possible to implement cancelling queries blocked on communication with remote nodes.	2016-12-12 15:18:12 -08:00
Andres Freund	3505d431cd	Add initial helpers to make interactions with MultiConnection et al. easier. This includes basic infrastructure for logging of commands sent to remote/worker nodes. Note that this has no effect as of yet, since no callers are converted to the new infrastructure.	2016-12-07 11:44:24 -08:00
Andres Freund	3223b3c92d	Centralized Connection Lifetime Management. Connections are tracked and released by integrating into postgres' transaction handling. That allows to to use connections without having to resort to having to disable interrupts or using PG_TRY/CATCH blocks to avoid leaking connections. This is intended to eventually replace multi_client_executor.c and connection_cache.c, and to provide the basis of a centralized transaction management. The newly introduced transaction hook should, in the future, be the only one in citus, to allow for proper ordering between operations. For now this central handler is responsible for releasing connections and resetting XactModificationLevel after a transaction.	2016-12-07 11:43:18 -08:00