pgsql: Refactor "ALTER some-obj SET SCHEMA" implementation

Refactor "ALTER some-obj SET SCHEMA" implementation

Instead of having each object type implement the catalog munging
independently, centralize knowledge about how to do it and expand the
existing table in objectaddress.c with enough data about each object
type to support this operation.

Author: KaiGai Kohei
Tweaks by me
Reviewed by Robert Haas

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/2164f9a1254980a02ef9ca99ee3bcb8c1298b219

Modified Files
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src/backend/catalog/objectaddress.c | 268 +++++++++++++++++++++++++++++----
src/backend/commands/alter.c | 120 ++++++---------
src/backend/commands/collationcmds.c | 9 +-
src/backend/commands/conversioncmds.c | 50 ------
src/backend/commands/dropcmds.c | 1 -
src/backend/commands/functioncmds.c | 33 +---
src/backend/commands/opclasscmds.c | 104 -------------
src/backend/commands/operatorcmds.c | 53 -------
src/backend/commands/tsearchcmds.c | 188 -----------------------
src/backend/nodes/copyfuncs.c | 1 -
src/backend/nodes/equalfuncs.c | 1 -
src/backend/parser/gram.y | 4 +-
src/include/catalog/objectaddress.h | 12 ++-
src/include/commands/alter.h | 7 +-
src/include/commands/conversioncmds.h | 2 -
src/include/commands/defrem.h | 14 --
src/include/nodes/parsenodes.h | 1 -
17 files changed, 316 insertions(+), 552 deletions(-)