pgsql: Logical replication support for initial data copy

Logical replication support for initial data copy

Add functionality for a new subscription to copy the initial data in the
tables and then sync with the ongoing apply process.

For the copying, add a new internal COPY option to have the COPY source
data provided by a callback function. The initial data copy works on
the subscriber by receiving COPY data from the publisher and then
providing it locally into a COPY that writes to the destination table.

A WAL receiver can now execute full SQL commands. This is used here to
obtain information about tables and publications.

Several new options were added to CREATE and ALTER SUBSCRIPTION to
control whether and when initial table syncing happens.

Change pg_dump option --no-create-subscription-slots to
--no-subscription-connect and use the new CREATE SUBSCRIPTION
... NOCONNECT option for that.

Author: Petr Jelinek <petr(dot)jelinek(at)2ndquadrant(dot)com>
Tested-by: Erik Rijkers <er(at)xs4all(dot)nl>

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/7c4f52409a8c7d85ed169bbbc1f6092274d03920

Modified Files
--------------
contrib/file_fdw/file_fdw.c | 5 +-
doc/src/sgml/catalogs.sgml | 78 ++
doc/src/sgml/config.sgml | 25 +
doc/src/sgml/logical-replication.sgml | 55 +-
doc/src/sgml/monitoring.sgml | 9 +-
doc/src/sgml/protocol.sgml | 9 +-
doc/src/sgml/ref/alter_subscription.sgml | 50 +-
doc/src/sgml/ref/create_subscription.sgml | 38 +
doc/src/sgml/ref/pg_dump.sgml | 15 +-
src/backend/catalog/Makefile | 1 +
src/backend/catalog/heap.c | 6 +
src/backend/catalog/pg_publication.c | 4 +-
src/backend/catalog/pg_subscription.c | 282 +++++++
src/backend/catalog/system_views.sql | 1 +
src/backend/commands/copy.c | 23 +-
src/backend/commands/subscriptioncmds.c | 468 ++++++++++--
src/backend/parser/gram.y | 39 +-
src/backend/postmaster/pgstat.c | 6 +
.../libpqwalreceiver/libpqwalreceiver.c | 203 ++++-
src/backend/replication/logical/Makefile | 2 +-
src/backend/replication/logical/launcher.c | 130 +++-
src/backend/replication/logical/relation.c | 7 +
src/backend/replication/logical/snapbuild.c | 85 ++-
src/backend/replication/logical/tablesync.c | 840 +++++++++++++++++++++
src/backend/replication/logical/worker.c | 203 +++--
src/backend/replication/repl_gram.y | 32 +-
src/backend/replication/repl_scanner.l | 5 +-
src/backend/replication/walsender.c | 104 ++-
src/backend/tcop/postgres.c | 5 +-
src/backend/utils/adt/misc.c | 20 +
src/backend/utils/cache/syscache.c | 14 +-
src/backend/utils/misc/guc.c | 12 +
src/bin/pg_dump/pg_backup.h | 2 +-
src/bin/pg_dump/pg_dump.c | 9 +-
src/bin/pg_dump/t/002_pg_dump.pl | 2 +-
src/include/catalog/catversion.h | 2 +-
src/include/catalog/indexing.h | 7 +-
src/include/catalog/pg_proc.h | 5 +-
src/include/catalog/pg_subscription_rel.h | 78 ++
src/include/commands/copy.h | 5 +-
src/include/nodes/nodes.h | 1 +
src/include/nodes/parsenodes.h | 13 +
src/include/nodes/replnodes.h | 9 +
src/include/parser/kwlist.h | 1 +
src/include/pgstat.h | 4 +-
src/include/replication/logical.h | 13 +-
src/include/replication/logicallauncher.h | 1 +
src/include/replication/snapbuild.h | 1 +
src/include/replication/walreceiver.h | 67 +-
src/include/replication/walsender.h | 12 +-
src/include/replication/worker_internal.h | 30 +-
src/include/utils/syscache.h | 1 +
src/test/regress/expected/object_address.out | 3 +-
src/test/regress/expected/rules.out | 3 +-
src/test/regress/expected/sanity_check.out | 1 +
src/test/regress/expected/subscription.out | 45 +-
src/test/regress/sql/object_address.sql | 2 +-
src/test/regress/sql/subscription.sql | 11 +-
src/test/subscription/t/001_rep_changes.pl | 36 +-
src/test/subscription/t/002_types.pl | 6 +
src/test/subscription/t/003_constraints.pl | 2 +-
src/test/subscription/t/004_sync.pl | 159 ++++
62 files changed, 2966 insertions(+), 341 deletions(-)