pgsql: Syntax support and documentation for event triggers.

Syntax support and documentation for event triggers.

They don't actually do anything yet; that will get fixed in a
follow-on commit. But this gets the basic infrastructure in place,
including CREATE/ALTER/DROP EVENT TRIGGER; support for COMMENT,
SECURITY LABEL, and ALTER EXTENSION .. ADD/DROP EVENT TRIGGER;
pg_dump and psql support; and documentation for the anticipated
initial feature set.

Dimitri Fontaine, with review and a bunch of additional hacking by me.
Thom Brown extensively reviewed earlier versions of this patch set,
but there's not a whole lot of that code left in this commit, as it
turns out.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/3855968f328918b6cd1401dd11d109d471a54d40

Modified Files
--------------
doc/src/sgml/catalogs.sgml | 87 +++++
doc/src/sgml/event-trigger.sgml | 415 +++++++++++++++++++++
doc/src/sgml/filelist.sgml | 1 +
doc/src/sgml/postgres.sgml | 1 +
doc/src/sgml/ref/allfiles.sgml | 3 +
doc/src/sgml/ref/alter_event_trigger.sgml | 105 ++++++
doc/src/sgml/ref/alter_extension.sgml | 1 +
doc/src/sgml/ref/comment.sgml | 1 +
doc/src/sgml/ref/create_event_trigger.sgml | 162 ++++++++
doc/src/sgml/ref/drop_event_trigger.sgml | 113 ++++++
doc/src/sgml/ref/psql-ref.sgml | 14 +
doc/src/sgml/ref/security_label.sgml | 1 +
doc/src/sgml/reference.sgml | 3 +
src/backend/catalog/Makefile | 2 +-
src/backend/catalog/aclchk.c | 40 ++
src/backend/catalog/dependency.c | 27 ++-
src/backend/catalog/objectaddress.c | 22 ++
src/backend/catalog/pg_shdepend.c | 6 +
src/backend/catalog/system_views.sql | 13 +
src/backend/commands/Makefile | 4 +-
src/backend/commands/alter.c | 9 +
src/backend/commands/dropcmds.c | 4 +
src/backend/commands/event_trigger.c | 539 +++++++++++++++++++++++++++
src/backend/nodes/copyfuncs.c | 30 ++
src/backend/nodes/equalfuncs.c | 26 ++
src/backend/parser/gram.y | 113 ++++++-
src/backend/tcop/utility.c | 33 ++
src/backend/utils/adt/pseudotypes.c | 27 ++
src/backend/utils/cache/syscache.c | 23 ++
src/bin/pg_dump/common.c | 5 +
src/bin/pg_dump/pg_dump.c | 150 ++++++++
src/bin/pg_dump/pg_dump.h | 16 +-
src/bin/pg_dump/pg_dump_sort.c | 16 +-
src/bin/psql/command.c | 3 +
src/bin/psql/describe.c | 61 +++
src/bin/psql/describe.h | 3 +
src/bin/psql/help.c | 1 +
src/include/catalog/catversion.h | 2 +-
src/include/catalog/dependency.h | 1 +
src/include/catalog/indexing.h | 5 +
src/include/catalog/pg_event_trigger.h | 63 +++
src/include/catalog/pg_proc.h | 4 +
src/include/catalog/pg_type.h | 2 +
src/include/commands/event_trigger.h | 28 ++
src/include/nodes/nodes.h | 2 +
src/include/nodes/parsenodes.h | 27 ++
src/include/parser/kwlist.h | 1 +
src/include/utils/acl.h | 2 +
src/include/utils/builtins.h | 2 +
src/include/utils/syscache.h | 2 +
src/test/regress/expected/event_trigger.out | 90 +++++
src/test/regress/expected/rules.out | 6 +-
src/test/regress/expected/sanity_check.out | 3 +-
src/test/regress/parallel_schedule | 2 +
src/test/regress/serial_schedule | 1 +
src/test/regress/sql/event_trigger.sql | 93 +++++
56 files changed, 2398 insertions(+), 18 deletions(-)