Make dblink interruptible, via new libpqsrv APIs. This replaces dblink's blocking libpq calls, allowing cancellation and allowing DROP DATABASE (of a database not involved in the query). Apart from explicit dblink_cancel_query() calls, dblink still doesn't cancel the remote side. The replacement for the blocking calls consists of new, general-purpose query execution wrappers in the libpqsrv facility. Out-of-tree extensions should adopt these.
The original commit d3c5f37dd543498cc7c678815d3921823beec9e9 did not back-patch. Back-patch now to v16-v13, bringing coverage to all supported versions. This back-patch omits the orignal's refactoring in postgres_fdw. Discussion: https://postgr.es/m/20231122012945...@rfd.leadboat.com Branch ------ REL_16_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/82a8f0f465ea4bb0d2774f9856ecd62067796686 Modified Files -------------- contrib/dblink/dblink.c | 24 ++-- .../libpqwalreceiver/libpqwalreceiver.c | 9 +- src/include/libpq/libpq-be-fe-helpers.h | 127 +++++++++++++++++++++ 3 files changed, 143 insertions(+), 17 deletions(-)
