Thread: pgsql: Add PQsendFlushRequest to libpq
Add PQsendFlushRequest to libpq This new libpq function allows the application to send an 'H' message, which instructs the server to flush its outgoing buffer. This hasn't been needed so far because the Sync message already requests a buffer; and I failed to realize that this was needed in pipeline mode because PQpipelineSync also causes the buffer to be flushed. However, sometimes it is useful to request a flush without establishing a synchronization point. Backpatch to 14, where pipeline mode was introduced in libpq. Reported-by: Boris Kolpackov <boris@codesynthesis.com> Author: Álvaro Herrera <alvherre@alvh.no-ip.org> Discussion: https://postgr.es/m/202106252350.t76x73nt643j@alvherre.pgsql Branch ------ REL_14_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/69cf1d5429d48d030d71d5dd4931084d422413cb Modified Files -------------- doc/src/sgml/libpq.sgml | 33 +++++++++++++++++++++++++++++++-- src/interfaces/libpq/exports.txt | 3 ++- src/interfaces/libpq/fe-exec.c | 36 ++++++++++++++++++++++++++++++++++++ src/interfaces/libpq/libpq-fe.h | 1 + 4 files changed, 70 insertions(+), 3 deletions(-)