pgsql: Propagate ALTER TYPE operations to typed tables

Propagate ALTER TYPE operations to typed tables

This adds RESTRICT/CASCADE flags to ALTER TYPE ... ADD/DROP/ALTER/
RENAME ATTRIBUTE to control whether to alter typed tables as well.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=f2a4278330ae12cd56b61c92a7debb9c9fca7b41

Modified Files
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doc/src/sgml/ref/alter_type.sgml          |   28 +++++-
src/backend/commands/alter.c              |    6 +-
src/backend/commands/tablecmds.c          |  151 +++++++++++++++++++++--------
src/backend/nodes/copyfuncs.c             |    1 +
src/backend/nodes/equalfuncs.c            |    1 +
src/backend/parser/gram.y                 |   23 +++--
src/include/commands/tablecmds.h          |    6 +-
src/include/nodes/parsenodes.h            |    1 +
src/test/regress/expected/alter_table.out |   89 +++++++++++++++++-
src/test/regress/sql/alter_table.sql      |   20 ++++-
10 files changed, 258 insertions(+), 68 deletions(-)