Remove special BKI_LOOKUP magic for namespace and role OIDs.

Now that commit 62f34097 attached BKI_LOOKUP annotation to all the
namespace and role OID columns in the catalogs, there's no real reason
to have the magic PGNSP and PGUID symbols.  Get rid of them in favor
of implementing those lookups according to genbki.pl's normal pattern.

This means that in the catalog headers, BKI_DEFAULT(PGNSP) becomes
BKI_DEFAULT(pg_catalog), which seems a lot more transparent.
BKI_DEFAULT(PGUID) becomes BKI_DEFAULT(POSTGRES), which is perhaps
less so; but you can look into pg_authid.dat to discover that
POSTGRES is the nonce name for the bootstrap superuser.

This change also means that if we ever need cross-references in the
initial catalog data to any of the other built-in roles besides
POSTGRES, or to some other built-in schema besides pg_catalog,
we can just do it.

No catversion bump here, as there's no actual change in the contents
of postgres.bki.

Discussion: https://postgr.es/m/3240355.1612129197@sss.pgh.pa.us

doc/src/sgml/bki.sgml

@@ -540,17 +540,6 @@
       expected to be in the <literal>pg_catalog</literal> schema.
      </para>
     </listitem>
-
-    <listitem>
-     <para>
-      In addition to the generic lookup mechanisms, there is a special
-      convention that <literal>PGNSP</literal> is replaced by the OID of
-      the <literal>pg_catalog</literal> schema,
-      and <literal>PGUID</literal> is replaced by the OID of the bootstrap
-      superuser role.  These usages are somewhat historical but so far
-      there hasn't been a need to generalize them.
-     </para>
-    </listitem>
    </itemizedlist>
 
    <para>

src/backend/catalog/genbki.pl

@@ -184,15 +184,9 @@ my $GenbkiNextOid = $FirstGenbkiObjectId;
 # within a given Postgres release, such as fixed OIDs.  Do not substitute
 # anything that could depend on platform or configuration.  (The right place
 # to handle those sorts of things is in initdb.c's bootstrap_template1().)
-my $BOOTSTRAP_SUPERUSERID =
-  Catalog::FindDefinedSymbolFromData($catalog_data{pg_authid},
-	'BOOTSTRAP_SUPERUSERID');
 my $C_COLLATION_OID =
   Catalog::FindDefinedSymbolFromData($catalog_data{pg_collation},
 	'C_COLLATION_OID');
-my $PG_CATALOG_NAMESPACE =
-  Catalog::FindDefinedSymbolFromData($catalog_data{pg_namespace},
-	'PG_CATALOG_NAMESPACE');
 
 
 # Fill in pg_class.relnatts by looking at the referenced catalog's schema.
@@ -213,11 +207,12 @@ foreach my $row (@{ $catalog_data{pg_am} })
 	$amoids{ $row->{amname} } = $row->{oid};
 }
 
-# There is only one authid at bootstrap time, and we handle it specially:
-# the usually-defaulted symbol PGUID becomes the bootstrap superuser's OID.
-# (We could drop this in favor of writing out BKI_DEFAULT(POSTGRES) ...)
+# role OID lookup
 my %authidoids;
-$authidoids{'PGUID'} = $BOOTSTRAP_SUPERUSERID;
+foreach my $row (@{ $catalog_data{pg_authid} })
+{
+	$authidoids{ $row->{rolname} } = $row->{oid};
+}
 
 # class (relation) OID lookup (note this only covers bootstrap catalogs!)
 my %classoids;
@@ -240,11 +235,12 @@ foreach my $row (@{ $catalog_data{pg_language} })
 	$langoids{ $row->{lanname} } = $row->{oid};
 }
 
-# There is only one namespace at bootstrap time, and we handle it specially:
-# the usually-defaulted symbol PGNSP becomes the pg_catalog namespace's OID.
-# (We could drop this in favor of writing out BKI_DEFAULT(pg_catalog) ...)
+# namespace (schema) OID lookup
 my %namespaceoids;
-$namespaceoids{'PGNSP'} = $PG_CATALOG_NAMESPACE;
+foreach my $row (@{ $catalog_data{pg_namespace} })
+{
+	$namespaceoids{ $row->{nspname} } = $row->{oid};
+}
 
 # opclass OID lookup
 my %opcoids;

src/include/catalog/pg_authid.dat

@@ -15,6 +15,10 @@
 # The C code typically refers to these roles using the #define symbols,
 # so make sure every entry has an oid_symbol value.
 
+# The bootstrap superuser is named POSTGRES according to this data and
+# according to BKI_DEFAULT entries in other catalogs.  However, initdb
+# will replace that at database initialization time.
+
 { oid => '10', oid_symbol => 'BOOTSTRAP_SUPERUSERID',
   rolname => 'POSTGRES', rolsuper => 't', rolinherit => 't',
   rolcreaterole => 't', rolcreatedb => 't', rolcanlogin => 't',

src/include/catalog/pg_class.h

@@ -38,7 +38,7 @@ CATALOG(pg_class,1259,RelationRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83,Relat
 	NameData	relname;
 
 	/* OID of namespace containing this class */
-	Oid			relnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			relnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* OID of entry in pg_type for relation's implicit row type, if any */
 	Oid			reltype BKI_LOOKUP_OPT(pg_type);
@@ -47,7 +47,7 @@ CATALOG(pg_class,1259,RelationRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(83,Relat
 	Oid			reloftype BKI_DEFAULT(0) BKI_LOOKUP_OPT(pg_type);
 
 	/* class owner */
-	Oid			relowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			relowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* access method; 0 if not a table / index */
 	Oid			relam BKI_DEFAULT(heap) BKI_LOOKUP_OPT(pg_am);

src/include/catalog/pg_collation.h

@@ -30,9 +30,12 @@ CATALOG(pg_collation,3456,CollationRelationId)
 {
 	Oid			oid;			/* oid */
 	NameData	collname;		/* collation name */
-	Oid			collnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);	/* OID of namespace
-																			 * containing collation */
-	Oid			collowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid); /* owner of collation */
+
+	/* OID of namespace containing this collation */
+	Oid			collnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
+
+	/* owner of collation */
+	Oid			collowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 	char		collprovider;	/* see constants below */
 	bool		collisdeterministic BKI_DEFAULT(t);
 	int32		collencoding;	/* encoding for this collation; -1 = "all" */

src/include/catalog/pg_conversion.h

@@ -35,10 +35,10 @@ CATALOG(pg_conversion,2607,ConversionRelationId)
 	NameData	conname;
 
 	/* namespace that the conversion belongs to */
-	Oid			connamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			connamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* owner of the conversion */
-	Oid			conowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			conowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* FOR encoding id */
 	int32		conforencoding BKI_LOOKUP(encoding);

src/include/catalog/pg_database.h

@@ -35,7 +35,7 @@ CATALOG(pg_database,1262,DatabaseRelationId) BKI_SHARED_RELATION BKI_ROWTYPE_OID
 	NameData	datname;
 
 	/* owner of database */
-	Oid			datdba BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			datdba BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* character encoding */
 	int32		encoding;

src/include/catalog/pg_language.h

@@ -34,7 +34,7 @@ CATALOG(pg_language,2612,LanguageRelationId)
 	NameData	lanname;
 
 	/* Language's owner */
-	Oid			lanowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			lanowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* Is a procedural language */
 	bool		lanispl BKI_DEFAULT(f);

src/include/catalog/pg_namespace.h

@@ -37,7 +37,7 @@ CATALOG(pg_namespace,2615,NamespaceRelationId)
 	Oid			oid;			/* oid */
 
 	NameData	nspname;
-	Oid			nspowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			nspowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
 	aclitem		nspacl[1];

src/include/catalog/pg_opclass.h

@@ -57,10 +57,10 @@ CATALOG(pg_opclass,2616,OperatorClassRelationId)
 	NameData	opcname;
 
 	/* namespace of this opclass */
-	Oid			opcnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			opcnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* opclass owner */
-	Oid			opcowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			opcowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* containing operator family */
 	Oid			opcfamily BKI_LOOKUP(pg_opfamily);

src/include/catalog/pg_operator.h

@@ -36,10 +36,10 @@ CATALOG(pg_operator,2617,OperatorRelationId)
 	NameData	oprname;
 
 	/* OID of namespace containing this oper */
-	Oid			oprnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			oprnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* operator owner */
-	Oid			oprowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			oprowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* 'l' for prefix or 'b' for infix */
 	char		oprkind BKI_DEFAULT(b);

src/include/catalog/pg_opfamily.h

@@ -37,10 +37,10 @@ CATALOG(pg_opfamily,2753,OperatorFamilyRelationId)
 	NameData	opfname;
 
 	/* namespace of this opfamily */
-	Oid			opfnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			opfnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* opfamily owner */
-	Oid			opfowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			opfowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 } FormData_pg_opfamily;
 
 /* ----------------

src/include/catalog/pg_proc.h

@@ -35,10 +35,10 @@ CATALOG(pg_proc,1255,ProcedureRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(81,Proce
 	NameData	proname;
 
 	/* OID of namespace containing this proc */
-	Oid			pronamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			pronamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* procedure owner */
-	Oid			proowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			proowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* OID of pg_language entry */
 	Oid			prolang BKI_DEFAULT(internal) BKI_LOOKUP(pg_language);

src/include/catalog/pg_tablespace.h

@@ -30,7 +30,9 @@ CATALOG(pg_tablespace,1213,TableSpaceRelationId) BKI_SHARED_RELATION
 {
 	Oid			oid;			/* oid */
 	NameData	spcname;		/* tablespace name */
-	Oid			spcowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);	/* owner of tablespace */
+
+	/* owner of tablespace */
+	Oid			spcowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 #ifdef CATALOG_VARLEN			/* variable-length fields start here */
 	aclitem		spcacl[1];		/* access permissions */

src/include/catalog/pg_ts_config.h

@@ -36,10 +36,10 @@ CATALOG(pg_ts_config,3602,TSConfigRelationId)
 	NameData	cfgname;
 
 	/* name space */
-	Oid			cfgnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			cfgnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* owner */
-	Oid			cfgowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			cfgowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* OID of parser */
 	Oid			cfgparser BKI_LOOKUP(pg_ts_parser);

src/include/catalog/pg_ts_dict.h

@@ -35,10 +35,10 @@ CATALOG(pg_ts_dict,3600,TSDictionaryRelationId)
 	NameData	dictname;
 
 	/* name space */
-	Oid			dictnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			dictnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* owner */
-	Oid			dictowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			dictowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/* dictionary's template */
 	Oid			dicttemplate BKI_LOOKUP(pg_ts_template);

src/include/catalog/pg_ts_parser.h

@@ -34,7 +34,7 @@ CATALOG(pg_ts_parser,3601,TSParserRelationId)
 	NameData	prsname;
 
 	/* name space */
-	Oid			prsnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			prsnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* init parsing session */
 	regproc		prsstart BKI_LOOKUP(pg_proc);

src/include/catalog/pg_ts_template.h

@@ -34,7 +34,7 @@ CATALOG(pg_ts_template,3764,TSTemplateRelationId)
 	NameData	tmplname;
 
 	/* name space */
-	Oid			tmplnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			tmplnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* initialization method of dict (may be 0) */
 	regproc		tmplinit BKI_LOOKUP_OPT(pg_proc);

src/include/catalog/pg_type.h

@@ -41,10 +41,10 @@ CATALOG(pg_type,1247,TypeRelationId) BKI_BOOTSTRAP BKI_ROWTYPE_OID(71,TypeRelati
 	NameData	typname;
 
 	/* OID of namespace containing this type */
-	Oid			typnamespace BKI_DEFAULT(PGNSP) BKI_LOOKUP(pg_namespace);
+	Oid			typnamespace BKI_DEFAULT(pg_catalog) BKI_LOOKUP(pg_namespace);
 
 	/* type owner */
-	Oid			typowner BKI_DEFAULT(PGUID) BKI_LOOKUP(pg_authid);
+	Oid			typowner BKI_DEFAULT(POSTGRES) BKI_LOOKUP(pg_authid);
 
 	/*
 	 * For a fixed-size type, typlen is the number of bytes we use to