Change many routines to return ObjectAddress rather than OID

The changed routines are mostly those that can be directly called by
ProcessUtilitySlow; the intention is to make the affected object
information more precise, in support for future event trigger changes.
Originally it was envisioned that the OID of the affected object would
be enough, and in most cases that is correct, but upon actually
implementing the event trigger changes it turned out that ObjectAddress
is more widely useful.

Additionally, some command execution routines grew an output argument
that's an object address which provides further info about the executed
command.  To wit:

* for ALTER DOMAIN / ADD CONSTRAINT, it corresponds to the address of
  the new constraint

* for ALTER OBJECT / SET SCHEMA, it corresponds to the address of the
  schema that originally contained the object.

* for ALTER EXTENSION {ADD, DROP} OBJECT, it corresponds to the address
  of the object added to or dropped from the extension.

There's no user-visible change in this commit, and no functional change
either.

Discussion: 20150218213255.GC6717@tamriel.snowman.net
Reviewed-By: Stephen Frost, Andres Freund

1 files changed, 3 insertions, 2 deletions

diff --git a/src/include/commands/sequence.h b/src/include/commands/sequence.h
index 1baf43d3d32..44862bba81d 100644
--- a/src/include/commands/sequence.h
+++ b/src/include/commands/sequence.h
@@ -14,6 +14,7 @@
 #define SEQUENCE_H
 
 #include "access/xlogreader.h"
+#include "catalog/objectaddress.h"
 #include "fmgr.h"
 #include "lib/stringinfo.h"
 #include "nodes/parsenodes.h"
@@ -72,8 +73,8 @@ extern Datum lastval(PG_FUNCTION_ARGS);
 
 extern Datum pg_sequence_parameters(PG_FUNCTION_ARGS);
 
-extern Oid	DefineSequence(CreateSeqStmt *stmt);
-extern Oid	AlterSequence(AlterSeqStmt *stmt);
+extern ObjectAddress DefineSequence(CreateSeqStmt *stmt);
+extern ObjectAddress AlterSequence(AlterSeqStmt *stmt);
 extern void ResetSequence(Oid seq_relid);
 extern void ResetSequenceCaches(void);