pgsql: WITH CHECK OPTION support for auto-updatable VIEWs

WITH CHECK OPTION support for auto-updatable VIEWs

For simple views which are automatically updatable, this patch allows
the user to specify what level of checking should be done on records
being inserted or updated. For 'LOCAL CHECK', new tuples are validated
against the conditionals of the view they are being inserted into, while
for 'CASCADED CHECK' the new tuples are validated against the
conditionals for all views involved (from the top down).

This option is part of the SQL specification.

Dean Rasheed, reviewed by Pavel Stehule

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/4cbe3ac3e86790d05c569de4585e5075a62a9b41

Modified Files
--------------
doc/src/sgml/ref/alter_view.sgml | 5 +
doc/src/sgml/ref/create_view.sgml | 199 ++++++++++----
src/backend/access/common/reloptions.c | 14 +
src/backend/catalog/information_schema.sql | 8 +-
src/backend/catalog/sql_features.txt | 4 +-
src/backend/commands/tablecmds.c | 36 +++
src/backend/commands/view.c | 68 +++++
src/backend/executor/execMain.c | 43 +++
src/backend/executor/nodeModifyTable.c | 33 +++
src/backend/nodes/copyfuncs.c | 18 ++
src/backend/nodes/equalfuncs.c | 15 +
src/backend/nodes/nodeFuncs.c | 14 +
src/backend/nodes/outfuncs.c | 15 +
src/backend/nodes/readfuncs.c | 18 ++
src/backend/optimizer/plan/createplan.c | 15 +-
src/backend/optimizer/plan/planner.c | 30 +-
src/backend/parser/gram.y | 43 ++-
src/backend/rewrite/rewriteHandler.c | 117 +++++++-
src/bin/pg_dump/pg_dump.c | 16 +-
src/bin/pg_dump/pg_dump.h | 1 +
src/include/catalog/catversion.h | 2 +-
src/include/commands/view.h | 2 +
src/include/executor/executor.h | 2 +
src/include/nodes/execnodes.h | 4 +
src/include/nodes/nodes.h | 1 +
src/include/nodes/parsenodes.h | 23 ++
src/include/nodes/plannodes.h | 1 +
src/include/optimizer/planmain.h | 3 +-
src/include/rewrite/rewriteHandler.h | 4 +
src/include/utils/rel.h | 34 +++
src/test/regress/expected/create_view.out | 2 +-
src/test/regress/expected/updatable_views.out | 363 +++++++++++++++++++++++++
src/test/regress/sql/updatable_views.sql | 199 ++++++++++++++
33 files changed, 1245 insertions(+), 107 deletions(-)