Improve error messages about mismatching relkind

Most error messages about a relkind that was not supported or
appropriate for the command was of the pattern

    "relation \"%s\" is not a table, foreign table, or materialized view"

This style can become verbose and tedious to maintain.  Moreover, it's
not very helpful: If I'm trying to create a comment on a TOAST table,
which is not supported, then the information that I could have created
a comment on a materialized view is pointless.

Instead, write the primary error message shorter and saying more
directly that what was attempted is not possible.  Then, in the detail
message, explain that the operation is not supported for the relkind
the object was.  To simplify that, add a new function
errdetail_relkind_not_supported() that does this.

In passing, make use of RELKIND_HAS_STORAGE() where appropriate,
instead of listing out the relkinds individually.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Alvaro Herrera <alvherre@alvh.no-ip.org>
Discussion: https://www.postgresql.org/message-id/flat/dc35a398-37d0-75ce-07ea-1dd71d98f8ec@2ndquadrant.com

contrib/amcheck/expected/check_heap.out

@@ -139,7 +139,8 @@ CREATE TABLE test_partitioned (a int, b text default repeat('x', 5000))
 SELECT * FROM verify_heapam('test_partitioned',
 							startblock := NULL,
 							endblock := NULL);
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  cannot check relation "test_partitioned"
+DETAIL:  This operation is not supported for partitioned tables.
 -- Check that valid options are not rejected nor corruption reported
 -- for an empty partition table (the child one)
 CREATE TABLE test_partition partition OF test_partitioned FOR VALUES IN (1);
@@ -165,19 +166,22 @@ CREATE INDEX test_index ON test_partition (a);
 SELECT * FROM verify_heapam('test_index',
 							startblock := NULL,
 							endblock := NULL);
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  cannot check relation "test_index"
+DETAIL:  This operation is not supported for indexes.
 -- Check that views are rejected
 CREATE VIEW test_view AS SELECT 1;
 SELECT * FROM verify_heapam('test_view',
 							startblock := NULL,
 							endblock := NULL);
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  cannot check relation "test_view"
+DETAIL:  This operation is not supported for views.
 -- Check that sequences are rejected
 CREATE SEQUENCE test_sequence;
 SELECT * FROM verify_heapam('test_sequence',
 							startblock := NULL,
 							endblock := NULL);
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  cannot check relation "test_sequence"
+DETAIL:  This operation is not supported for sequences.
 -- Check that foreign tables are rejected
 CREATE FOREIGN DATA WRAPPER dummy;
 CREATE SERVER dummy_server FOREIGN DATA WRAPPER dummy;
@@ -185,7 +189,8 @@ CREATE FOREIGN TABLE test_foreign_table () SERVER dummy_server;
 SELECT * FROM verify_heapam('test_foreign_table',
 							startblock := NULL,
 							endblock := NULL);
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  cannot check relation "test_foreign_table"
+DETAIL:  This operation is not supported for foreign tables.
 -- cleanup
 DROP TABLE heaptest;
 DROP TABLE test_partition;

contrib/amcheck/verify_heapam.c

@@ -147,7 +147,6 @@ typedef struct HeapCheckContext
 } HeapCheckContext;
 
 /* Internal implementation */
-static void sanity_check_relation(Relation rel);
 static void check_tuple(HeapCheckContext *ctx);
 static void check_toast_tuple(HeapTuple toasttup, HeapCheckContext *ctx,
 							  ToastedAttribute *ta, int32 *expected_chunk_seq,
@@ -300,7 +299,23 @@ verify_heapam(PG_FUNCTION_ARGS)
 
 	/* Open relation, check relkind and access method */
 	ctx.rel = relation_open(relid, AccessShareLock);
-	sanity_check_relation(ctx.rel);
+
+	/*
+	 * Check that a relation's relkind and access method are both supported.
+	 */
+	if (ctx.rel->rd_rel->relkind != RELKIND_RELATION &&
+		ctx.rel->rd_rel->relkind != RELKIND_MATVIEW &&
+		ctx.rel->rd_rel->relkind != RELKIND_TOASTVALUE)
+		ereport(ERROR,
+				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+				 errmsg("cannot check relation \"%s\"",
+						RelationGetRelationName(ctx.rel)),
+				 errdetail_relkind_not_supported(ctx.rel->rd_rel->relkind)));
+
+	if (ctx.rel->rd_rel->relam != HEAP_TABLE_AM_OID)
+		ereport(ERROR,
+				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+				 errmsg("only heap AM is supported")));
 
 	/* Early exit if the relation is empty */
 	nblocks = RelationGetNumberOfBlocks(ctx.rel);
@@ -523,25 +538,6 @@ verify_heapam(PG_FUNCTION_ARGS)
 	PG_RETURN_NULL();
 }
 
-/*
- * Check that a relation's relkind and access method are both supported.
- */
-static void
-sanity_check_relation(Relation rel)
-{
-	if (rel->rd_rel->relkind != RELKIND_RELATION &&
-		rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, materialized view, or TOAST table",
-						RelationGetRelationName(rel))));
-	if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
-		ereport(ERROR,
-				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("only heap AM is supported")));
-}
-
 /*
  * Shared internal implementation for report_corruption and
  * report_toast_corruption.

contrib/pageinspect/expected/page.out

@@ -180,9 +180,11 @@ DROP TABLE test1;
 create table test_partitioned (a int) partition by range (a);
 create index test_partitioned_index on test_partitioned (a);
 select get_raw_page('test_partitioned', 0); -- error about partitioned table
-ERROR:  cannot get raw page from partitioned table "test_partitioned"
+ERROR:  cannot get raw page from relation "test_partitioned"
+DETAIL:  This operation is not supported for partitioned tables.
 select get_raw_page('test_partitioned_index', 0); -- error about partitioned index
-ERROR:  cannot get raw page from partitioned index "test_partitioned_index"
+ERROR:  cannot get raw page from relation "test_partitioned_index"
+DETAIL:  This operation is not supported for partitioned indexes.
 -- a regular table which is a member of a partition set should work though
 create table test_part1 partition of test_partitioned for values from ( 1 ) to (100);
 select get_raw_page('test_part1', 0); -- get farther and error about empty table

contrib/pageinspect/rawpage.c

@@ -155,32 +155,12 @@ get_raw_page_internal(text *relname, ForkNumber forknum, BlockNumber blkno)
 	relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
 	rel = relation_openrv(relrv, AccessShareLock);
 
-	/* Check that this relation has storage */
-	if (rel->rd_rel->relkind == RELKIND_VIEW)
+	if (!RELKIND_HAS_STORAGE(rel->rd_rel->relkind))
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("cannot get raw page from view \"%s\"",
-						RelationGetRelationName(rel))));
-	if (rel->rd_rel->relkind == RELKIND_COMPOSITE_TYPE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("cannot get raw page from composite type \"%s\"",
-						RelationGetRelationName(rel))));
-	if (rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("cannot get raw page from foreign table \"%s\"",
-						RelationGetRelationName(rel))));
-	if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("cannot get raw page from partitioned table \"%s\"",
-						RelationGetRelationName(rel))));
-	if (rel->rd_rel->relkind == RELKIND_PARTITIONED_INDEX)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("cannot get raw page from partitioned index \"%s\"",
-						RelationGetRelationName(rel))));
+				 errmsg("cannot get raw page from relation \"%s\"",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 	/*
 	 * Reject attempts to read non-local temporary relations; we would be

contrib/pg_surgery/expected/heap_surgery.out

@@ -170,9 +170,11 @@ rollback;
 -- check that it fails on an unsupported relkind
 create view vw as select 1;
 select heap_force_kill('vw'::regclass, ARRAY['(0, 1)']::tid[]);
-ERROR:  "vw" is not a table, materialized view, or TOAST table
+ERROR:  cannot operate on relation "vw"
+DETAIL:  This operation is not supported for views.
 select heap_force_freeze('vw'::regclass, ARRAY['(0, 1)']::tid[]);
-ERROR:  "vw" is not a table, materialized view, or TOAST table
+ERROR:  cannot operate on relation "vw"
+DETAIL:  This operation is not supported for views.
 -- cleanup.
 drop view vw;
 drop extension pg_surgery;

contrib/pg_surgery/heap_surgery.c

@@ -37,7 +37,6 @@ static int32 tidcmp(const void *a, const void *b);
 static Datum heap_force_common(FunctionCallInfo fcinfo,
 							   HeapTupleForceOption heap_force_opt);
 static void sanity_check_tid_array(ArrayType *ta, int *ntids);
-static void sanity_check_relation(Relation rel);
 static BlockNumber find_tids_one_page(ItemPointer tids, int ntids,
 									  OffsetNumber *next_start_ptr);
 
@@ -101,8 +100,28 @@ heap_force_common(FunctionCallInfo fcinfo, HeapTupleForceOption heap_force_opt)
 
 	rel = relation_open(relid, RowExclusiveLock);
 
-	/* Check target relation. */
-	sanity_check_relation(rel);
+	/*
+	 * Check target relation.
+	 */
+	if (rel->rd_rel->relkind != RELKIND_RELATION &&
+		rel->rd_rel->relkind != RELKIND_MATVIEW &&
+		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
+		ereport(ERROR,
+				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+				 errmsg("cannot operate on relation \"%s\"",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
+
+	if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
+		ereport(ERROR,
+				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+				 errmsg("only heap AM is supported")));
+
+	/* Must be owner of the table or superuser. */
+	if (!pg_class_ownercheck(RelationGetRelid(rel), GetUserId()))
+		aclcheck_error(ACLCHECK_NOT_OWNER,
+					   get_relkind_objtype(rel->rd_rel->relkind),
+					   RelationGetRelationName(rel));
 
 	tids = ((ItemPointer) ARR_DATA_PTR(ta));
 
@@ -363,35 +382,6 @@ sanity_check_tid_array(ArrayType *ta, int *ntids)
 	*ntids = ArrayGetNItems(ARR_NDIM(ta), ARR_DIMS(ta));
 }
 
-/*-------------------------------------------------------------------------
- * sanity_check_relation()
- *
- * Perform sanity checks on the given relation.
- * ------------------------------------------------------------------------
- */
-static void
-sanity_check_relation(Relation rel)
-{
-	if (rel->rd_rel->relkind != RELKIND_RELATION &&
-		rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, materialized view, or TOAST table",
-						RelationGetRelationName(rel))));
-
-	if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
-		ereport(ERROR,
-				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("only heap AM is supported")));
-
-	/* Must be owner of the table or superuser. */
-	if (!pg_class_ownercheck(RelationGetRelid(rel), GetUserId()))
-		aclcheck_error(ACLCHECK_NOT_OWNER,
-					   get_relkind_objtype(rel->rd_rel->relkind),
-					   RelationGetRelationName(rel));
-}
-
 /*-------------------------------------------------------------------------
  * find_tids_one_page()
  *

contrib/pg_visibility/expected/pg_visibility.out

@@ -41,66 +41,91 @@ ROLLBACK;
 create table test_partitioned (a int) partition by list (a);
 -- these should all fail
 select pg_visibility('test_partitioned', 0);
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 select pg_visibility_map('test_partitioned');
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 select pg_visibility_map_summary('test_partitioned');
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 select pg_check_frozen('test_partitioned');
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 select pg_truncate_visibility_map('test_partitioned');
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 create table test_partition partition of test_partitioned for values in (1);
 create index test_index on test_partition (a);
 -- indexes do not, so these all fail
 select pg_visibility('test_index', 0);
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_index" is of wrong relation kind
+DETAIL:  This operation is not supported for indexes.
 select pg_visibility_map('test_index');
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_index" is of wrong relation kind
+DETAIL:  This operation is not supported for indexes.
 select pg_visibility_map_summary('test_index');
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_index" is of wrong relation kind
+DETAIL:  This operation is not supported for indexes.
 select pg_check_frozen('test_index');
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_index" is of wrong relation kind
+DETAIL:  This operation is not supported for indexes.
 select pg_truncate_visibility_map('test_index');
-ERROR:  "test_index" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_index" is of wrong relation kind
+DETAIL:  This operation is not supported for indexes.
 create view test_view as select 1;
 -- views do not have VMs, so these all fail
 select pg_visibility('test_view', 0);
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 select pg_visibility_map('test_view');
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 select pg_visibility_map_summary('test_view');
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 select pg_check_frozen('test_view');
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 select pg_truncate_visibility_map('test_view');
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 create sequence test_sequence;
 -- sequences do not have VMs, so these all fail
 select pg_visibility('test_sequence', 0);
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_sequence" is of wrong relation kind
+DETAIL:  This operation is not supported for sequences.
 select pg_visibility_map('test_sequence');
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_sequence" is of wrong relation kind
+DETAIL:  This operation is not supported for sequences.
 select pg_visibility_map_summary('test_sequence');
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_sequence" is of wrong relation kind
+DETAIL:  This operation is not supported for sequences.
 select pg_check_frozen('test_sequence');
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_sequence" is of wrong relation kind
+DETAIL:  This operation is not supported for sequences.
 select pg_truncate_visibility_map('test_sequence');
-ERROR:  "test_sequence" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_sequence" is of wrong relation kind
+DETAIL:  This operation is not supported for sequences.
 create foreign data wrapper dummy;
 create server dummy_server foreign data wrapper dummy;
 create foreign table test_foreign_table () server dummy_server;
 -- foreign tables do not have VMs, so these all fail
 select pg_visibility('test_foreign_table', 0);
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 select pg_visibility_map('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 select pg_visibility_map_summary('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 select pg_check_frozen('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 select pg_truncate_visibility_map('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 -- check some of the allowed relkinds
 create table regular_table (a int, b text);
 alter table regular_table alter column b set storage external;

contrib/pg_visibility/pg_visibility.c

@@ -781,6 +781,7 @@ check_relation_relkind(Relation rel)
 		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, materialized view, or TOAST table",
-						RelationGetRelationName(rel))));
+				 errmsg("relation \"%s\" is of wrong relation kind",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 }

contrib/pgstattuple/expected/pgstattuple.out

@@ -155,13 +155,17 @@ create table test_partitioned (a int) partition by range (a);
 create index test_partitioned_index on test_partitioned(a);
 -- these should all fail
 select pgstattuple('test_partitioned');
-ERROR:  "test_partitioned" (partitioned table) is not supported
+ERROR:  cannot get tuple-level statistics for relation "test_partitioned"
+DETAIL:  This operation is not supported for partitioned tables.
 select pgstattuple('test_partitioned_index');
-ERROR:  "test_partitioned_index" (partitioned index) is not supported
+ERROR:  cannot get tuple-level statistics for relation "test_partitioned_index"
+DETAIL:  This operation is not supported for partitioned indexes.
 select pgstattuple_approx('test_partitioned');
-ERROR:  "test_partitioned" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_partitioned" is of wrong relation kind
+DETAIL:  This operation is not supported for partitioned tables.
 select pg_relpages('test_partitioned');
-ERROR:  "test_partitioned" is not a table, index, materialized view, sequence, or TOAST table
+ERROR:  cannot get page count of relation "test_partitioned"
+DETAIL:  This operation is not supported for partitioned tables.
 select pgstatindex('test_partitioned');
 ERROR:  relation "test_partitioned" is not a btree index
 select pgstatginindex('test_partitioned');
@@ -171,11 +175,14 @@ ERROR:  "test_partitioned" is not an index
 create view test_view as select 1;
 -- these should all fail
 select pgstattuple('test_view');
-ERROR:  "test_view" (view) is not supported
+ERROR:  cannot get tuple-level statistics for relation "test_view"
+DETAIL:  This operation is not supported for views.
 select pgstattuple_approx('test_view');
-ERROR:  "test_view" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_view" is of wrong relation kind
+DETAIL:  This operation is not supported for views.
 select pg_relpages('test_view');
-ERROR:  "test_view" is not a table, index, materialized view, sequence, or TOAST table
+ERROR:  cannot get page count of relation "test_view"
+DETAIL:  This operation is not supported for views.
 select pgstatindex('test_view');
 ERROR:  relation "test_view" is not a btree index
 select pgstatginindex('test_view');
@@ -187,11 +194,14 @@ create server dummy_server foreign data wrapper dummy;
 create foreign table test_foreign_table () server dummy_server;
 -- these should all fail
 select pgstattuple('test_foreign_table');
-ERROR:  "test_foreign_table" (foreign table) is not supported
+ERROR:  cannot get tuple-level statistics for relation "test_foreign_table"
+DETAIL:  This operation is not supported for foreign tables.
 select pgstattuple_approx('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, materialized view, or TOAST table
+ERROR:  relation "test_foreign_table" is of wrong relation kind
+DETAIL:  This operation is not supported for foreign tables.
 select pg_relpages('test_foreign_table');
-ERROR:  "test_foreign_table" is not a table, index, materialized view, sequence, or TOAST table
+ERROR:  cannot get page count of relation "test_foreign_table"
+DETAIL:  This operation is not supported for foreign tables.
 select pgstatindex('test_foreign_table');
 ERROR:  relation "test_foreign_table" is not a btree index
 select pgstatginindex('test_foreign_table');

contrib/pgstattuple/pgstatapprox.c

@@ -289,8 +289,9 @@ pgstattuple_approx_internal(Oid relid, FunctionCallInfo fcinfo)
 		  rel->rd_rel->relkind == RELKIND_TOASTVALUE))
 		ereport(ERROR,
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-				 errmsg("\"%s\" is not a table, materialized view, or TOAST table",
-						RelationGetRelationName(rel))));
+				 errmsg("relation \"%s\" is of wrong relation kind",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 	if (rel->rd_rel->relam != HEAP_TABLE_AM_OID)
 		ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),

contrib/pgstattuple/pgstatindex.c

@@ -128,8 +128,8 @@ typedef struct HashIndexStat
 } HashIndexStat;
 
 static Datum pgstatindex_impl(Relation rel, FunctionCallInfo fcinfo);
+static int64 pg_relpages_impl(Relation rel);
 static void GetHashPageStats(Page page, HashIndexStat *stats);
-static void check_relation_relkind(Relation rel);
 
 /* ------------------------------------------------------
  * pgstatindex()
@@ -383,7 +383,6 @@ Datum
 pg_relpages(PG_FUNCTION_ARGS)
 {
 	text	   *relname = PG_GETARG_TEXT_PP(0);
-	int64		relpages;
 	Relation	rel;
 	RangeVar   *relrv;
 
@@ -395,16 +394,7 @@ pg_relpages(PG_FUNCTION_ARGS)
 	relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
 	rel = relation_openrv(relrv, AccessShareLock);
 
-	/* only some relkinds have storage */
-	check_relation_relkind(rel);
-
-	/* note: this will work OK on non-local temp tables */
-
-	relpages = RelationGetNumberOfBlocks(rel);
-
-	relation_close(rel, AccessShareLock);
-
-	PG_RETURN_INT64(relpages);
+	PG_RETURN_INT64(pg_relpages_impl(rel));
 }
 
 /* No need for superuser checks in v1.5, see above */
@@ -412,23 +402,13 @@ Datum
 pg_relpages_v1_5(PG_FUNCTION_ARGS)
 {
 	text	   *relname = PG_GETARG_TEXT_PP(0);
-	int64		relpages;
 	Relation	rel;
 	RangeVar   *relrv;
 
 	relrv = makeRangeVarFromNameList(textToQualifiedNameList(relname));
 	rel = relation_openrv(relrv, AccessShareLock);
 
-	/* only some relkinds have storage */
-	check_relation_relkind(rel);
-
-	/* note: this will work OK on non-local temp tables */
-
-	relpages = RelationGetNumberOfBlocks(rel);
-
-	relation_close(rel, AccessShareLock);
-
-	PG_RETURN_INT64(relpages);
+	PG_RETURN_INT64(pg_relpages_impl(rel));
 }
 
 /* Must keep superuser() check, see above. */
@@ -436,7 +416,6 @@ Datum
 pg_relpagesbyid(PG_FUNCTION_ARGS)
 {
 	Oid			relid = PG_GETARG_OID(0);
-	int64		relpages;
 	Relation	rel;
 
 	if (!superuser())
@@ -446,16 +425,7 @@ pg_relpagesbyid(PG_FUNCTION_ARGS)
 
 	rel = relation_open(relid, AccessShareLock);
 
-	/* only some relkinds have storage */
-	check_relation_relkind(rel);
-
-	/* note: this will work OK on non-local temp tables */
-
-	relpages = RelationGetNumberOfBlocks(rel);
-
-	relation_close(rel, AccessShareLock);
-
-	PG_RETURN_INT64(relpages);
+	PG_RETURN_INT64(pg_relpages_impl(rel));
 }
 
 /* No need for superuser checks in v1.5, see above */
@@ -463,13 +433,24 @@ Datum
 pg_relpagesbyid_v1_5(PG_FUNCTION_ARGS)
 {
 	Oid			relid = PG_GETARG_OID(0);
-	int64		relpages;
 	Relation	rel;
 
 	rel = relation_open(relid, AccessShareLock);
 
-	/* only some relkinds have storage */
-	check_relation_relkind(rel);
+	PG_RETURN_INT64(pg_relpages_impl(rel));
+}
+
+static int64
+pg_relpages_impl(Relation rel)
+{
+	int64		relpages;
+
+	if (!RELKIND_HAS_STORAGE(rel->rd_rel->relkind))
+		ereport(ERROR,
+				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+				 errmsg("cannot get page count of relation \"%s\"",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 	/* note: this will work OK on non-local temp tables */
 
@@ -477,7 +458,7 @@ pg_relpagesbyid_v1_5(PG_FUNCTION_ARGS)
 
 	relation_close(rel, AccessShareLock);
 
-	PG_RETURN_INT64(relpages);
+	return relpages;
 }
 
 /* ------------------------------------------------------
@@ -754,21 +735,3 @@ GetHashPageStats(Page page, HashIndexStat *stats)
 	}
 	stats->free_space += PageGetExactFreeSpace(page);
 }
-
-/*
- * check_relation_relkind - convenience routine to check that relation
- * is of the relkind supported by the callers
- */
-static void
-check_relation_relkind(Relation rel)
-{
-	if (rel->rd_rel->relkind != RELKIND_RELATION &&
-		rel->rd_rel->relkind != RELKIND_INDEX &&
-		rel->rd_rel->relkind != RELKIND_MATVIEW &&
-		rel->rd_rel->relkind != RELKIND_SEQUENCE &&
-		rel->rd_rel->relkind != RELKIND_TOASTVALUE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, index, materialized view, sequence, or TOAST table",
-						RelationGetRelationName(rel))));
-}

contrib/pgstattuple/pgstattuple.c

@@ -284,31 +284,20 @@ pgstat_relation(Relation rel, FunctionCallInfo fcinfo)
 					err = "unknown index";
 					break;
 			}
+			ereport(ERROR,
+					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+					 errmsg("index \"%s\" (%s) is not supported",
+							RelationGetRelationName(rel), err)));
 			break;
-		case RELKIND_VIEW:
-			err = "view";
-			break;
-		case RELKIND_COMPOSITE_TYPE:
-			err = "composite type";
-			break;
-		case RELKIND_FOREIGN_TABLE:
-			err = "foreign table";
-			break;
-		case RELKIND_PARTITIONED_TABLE:
-			err = "partitioned table";
-			break;
-		case RELKIND_PARTITIONED_INDEX:
-			err = "partitioned index";
-			break;
+
 		default:
-			err = "unknown";
-			break;
+			ereport(ERROR,
+					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+					 errmsg("cannot get tuple-level statistics for relation \"%s\"",
+							RelationGetRelationName(rel)),
+					 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 	}
 
-	ereport(ERROR,
-			(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-			 errmsg("\"%s\" (%s) is not supported",
-					RelationGetRelationName(rel), err)));
 	return 0;					/* should not happen */
 }
 

src/backend/catalog/Makefile

@@ -26,6 +26,7 @@ OBJS = \
 	partition.o \
 	pg_aggregate.o \
 	pg_cast.o \
+	pg_class.o \
 	pg_collation.o \
 	pg_constraint.o \
 	pg_conversion.o \

src/backend/catalog/pg_class.c

@@ -0,0 +1,52 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_class.c
+ *	  routines to support manipulation of the pg_class relation
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *	  src/backend/catalog/pg_class.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "catalog/pg_class.h"
+
+/*
+ * Issue an errdetail() informing that the relkind is not supported for this
+ * operation.
+ */
+int
+errdetail_relkind_not_supported(char relkind)
+{
+	switch (relkind)
+	{
+		case RELKIND_RELATION:
+			return errdetail("This operation is not supported for tables.");
+		case RELKIND_INDEX:
+			return errdetail("This operation is not supported for indexes.");
+		case RELKIND_SEQUENCE:
+			return errdetail("This operation is not supported for sequences.");
+		case RELKIND_TOASTVALUE:
+			return errdetail("This operation is not supported for TOAST tables.");
+		case RELKIND_VIEW:
+			return errdetail("This operation is not supported for views.");
+		case RELKIND_MATVIEW:
+			return errdetail("This operation is not supported for materialized views.");
+		case RELKIND_COMPOSITE_TYPE:
+			return errdetail("This operation is not supported for composite types.");
+		case RELKIND_FOREIGN_TABLE:
+			return errdetail("This operation is not supported for foreign tables.");
+		case RELKIND_PARTITIONED_TABLE:
+			return errdetail("This operation is not supported for partitioned tables.");
+		case RELKIND_PARTITIONED_INDEX:
+			return errdetail("This operation is not supported for partitioned indexes.");
+		default:
+			elog(ERROR, "unrecognized relkind: '%c'", relkind);
+			return 0;
+	}
+}

src/backend/catalog/toasting.c

@@ -99,10 +99,8 @@ BootstrapToastTable(char *relName, Oid toastOid, Oid toastIndexOid)
 
 	if (rel->rd_rel->relkind != RELKIND_RELATION &&
 		rel->rd_rel->relkind != RELKIND_MATVIEW)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table or materialized view",
-						relName)));
+		elog(ERROR, "\"%s\" is not a table or materialized view",
+			 relName);
 
 	/* create_toast_table does all the work */
 	if (!create_toast_table(rel, toastOid, toastIndexOid, (Datum) 0,

src/backend/commands/comment.c

@@ -98,8 +98,9 @@ CommentObject(CommentStmt *stmt)
 				relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 				ereport(ERROR,
 						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-						 errmsg("\"%s\" is not a table, view, materialized view, composite type, or foreign table",
-								RelationGetRelationName(relation))));
+						 errmsg("cannot set comment on relation \"%s\"",
+								RelationGetRelationName(relation)),
+						 errdetail_relkind_not_supported(relation->rd_rel->relkind)));
 			break;
 		default:
 			break;

src/backend/commands/indexcmds.c

@@ -650,22 +650,12 @@ DefineIndex(Oid relationId,
 		case RELKIND_PARTITIONED_TABLE:
 			/* OK */
 			break;
-		case RELKIND_FOREIGN_TABLE:
-
-			/*
-			 * Custom error message for FOREIGN TABLE since the term is close
-			 * to a regular table and can confuse the user.
-			 */
-			ereport(ERROR,
-					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("cannot create index on foreign table \"%s\"",
-							RelationGetRelationName(rel))));
-			break;
 		default:
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("\"%s\" is not a table or materialized view",
-							RelationGetRelationName(rel))));
+					 errmsg("cannot create index on relation \"%s\"",
+							RelationGetRelationName(rel)),
+					 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 			break;
 	}
 

src/backend/commands/lockcmds.c

@@ -89,8 +89,9 @@ RangeVarCallbackForLockTable(const RangeVar *rv, Oid relid, Oid oldrelid,
 		relkind != RELKIND_VIEW)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table or view",
-						rv->relname)));
+				 errmsg("cannot lock relation \"%s\"",
+						rv->relname),
+				 errdetail_relkind_not_supported(relkind)));
 
 	/*
 	 * Make note if a temporary relation has been accessed in this

src/backend/commands/seclabel.c

@@ -188,8 +188,9 @@ ExecSecLabelStmt(SecLabelStmt *stmt)
 				relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 				ereport(ERROR,
 						(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-						 errmsg("\"%s\" is not a table, view, materialized view, composite type, or foreign table",
-								RelationGetRelationName(relation))));
+						 errmsg("cannot set security label on relation \"%s\"",
+								RelationGetRelationName(relation)),
+						 errdetail_relkind_not_supported(relation->rd_rel->relkind)));
 			break;
 		default:
 			break;

src/backend/commands/sequence.c

@@ -1680,8 +1680,9 @@ process_owned_by(Relation seqrel, List *owned_by, bool for_identity)
 			  tablerel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE))
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("referenced relation \"%s\" is not a table or foreign table",
-							RelationGetRelationName(tablerel))));
+					 errmsg("sequence cannot be owned by relation \"%s\"",
+							RelationGetRelationName(tablerel)),
+					 errdetail_relkind_not_supported(tablerel->rd_rel->relkind)));
 
 		/* We insist on same owner and schema */
 		if (seqrel->rd_rel->relowner != tablerel->rd_rel->relowner)

src/backend/commands/statscmds.c

@@ -135,8 +135,9 @@ CreateStatistics(CreateStatsStmt *stmt)
 			rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("relation \"%s\" is not a table, foreign table, or materialized view",
-							RelationGetRelationName(rel))));
+					 errmsg("cannot define statistics for relation \"%s\"",
+							RelationGetRelationName(rel)),
+					 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 		/* You must own the relation to create stats on it */
 		if (!pg_class_ownercheck(RelationGetRelid(rel), stxowner))

src/backend/commands/tablecmds.c

@@ -398,8 +398,7 @@ static void ATRewriteTables(AlterTableStmt *parsetree,
 							AlterTableUtilityContext *context);
 static void ATRewriteTable(AlteredTableInfo *tab, Oid OIDNewHeap, LOCKMODE lockmode);
 static AlteredTableInfo *ATGetQueueEntry(List **wqueue, Relation rel);
-static void ATSimplePermissions(Relation rel, int allowed_targets);
-static void ATWrongRelkindError(Relation rel, int allowed_targets);
+static void ATSimplePermissions(AlterTableType cmdtype, Relation rel, int allowed_targets);
 static void ATSimpleRecursion(List **wqueue, Relation rel,
 							  AlterTableCmd *cmd, bool recurse, LOCKMODE lockmode,
 							  AlterTableUtilityContext *context);
@@ -3394,8 +3393,9 @@ renameatt_check(Oid myrelid, Form_pg_class classform, bool recursing)
 		relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, view, materialized view, composite type, index, or foreign table",
-						NameStr(classform->relname))));
+				 errmsg("cannot rename columns of relation \"%s\"",
+						NameStr(classform->relname)),
+				 errdetail_relkind_not_supported(relkind)));
 
 	/*
 	 * permissions checking.  only the owner of a class can change its schema.
@@ -4422,7 +4422,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 	switch (cmd->subtype)
 	{
 		case AT_AddColumn:		/* ADD COLUMN */
-			ATSimplePermissions(rel,
+			ATSimplePermissions(cmd->subtype, rel,
 								ATT_TABLE | ATT_COMPOSITE_TYPE | ATT_FOREIGN_TABLE);
 			ATPrepAddColumn(wqueue, rel, recurse, recursing, false, cmd,
 							lockmode, context);
@@ -4430,7 +4430,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_ADD_COL;
 			break;
 		case AT_AddColumnToView:	/* add column via CREATE OR REPLACE VIEW */
-			ATSimplePermissions(rel, ATT_VIEW);
+			ATSimplePermissions(cmd->subtype, rel, ATT_VIEW);
 			ATPrepAddColumn(wqueue, rel, recurse, recursing, true, cmd,
 							lockmode, context);
 			/* Recursion occurs during execution phase */
@@ -4444,7 +4444,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			 * substitutes default values into INSERTs before it expands
 			 * rules.
 			 */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			/* No command-specific prep needed */
 			pass = cmd->def ? AT_PASS_ADD_OTHERCONSTR : AT_PASS_DROP;
@@ -4452,77 +4452,77 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 		case AT_CookedColumnDefault:	/* add a pre-cooked default */
 			/* This is currently used only in CREATE TABLE */
 			/* (so the permission check really isn't necessary) */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			pass = AT_PASS_ADD_OTHERCONSTR;
 			break;
 		case AT_AddIdentity:
-			ATSimplePermissions(rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			pass = AT_PASS_ADD_OTHERCONSTR;
 			break;
 		case AT_SetIdentity:
-			ATSimplePermissions(rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			/* This should run after AddIdentity, so do it in MISC pass */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DropIdentity:
-			ATSimplePermissions(rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			pass = AT_PASS_DROP;
 			break;
 		case AT_DropNotNull:	/* ALTER COLUMN DROP NOT NULL */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			ATPrepDropNotNull(rel, recurse, recursing);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			pass = AT_PASS_DROP;
 			break;
 		case AT_SetNotNull:		/* ALTER COLUMN SET NOT NULL */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* Need command-specific recursion decision */
 			ATPrepSetNotNull(wqueue, rel, cmd, recurse, recursing,
 							 lockmode, context);
 			pass = AT_PASS_COL_ATTRS;
 			break;
 		case AT_CheckNotNull:	/* check column is already marked NOT NULL */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			/* No command-specific prep needed */
 			pass = AT_PASS_COL_ATTRS;
 			break;
 		case AT_DropExpression: /* ALTER COLUMN DROP EXPRESSION */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			ATPrepDropExpression(rel, cmd, recurse, recursing, lockmode);
 			pass = AT_PASS_DROP;
 			break;
 		case AT_SetStatistics:	/* ALTER COLUMN SET STATISTICS */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX | ATT_PARTITIONED_INDEX | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX | ATT_PARTITIONED_INDEX | ATT_FOREIGN_TABLE);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_SetOptions:		/* ALTER COLUMN SET ( options ) */
 		case AT_ResetOptions:	/* ALTER COLUMN RESET ( options ) */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_SetStorage:		/* ALTER COLUMN SET STORAGE */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW | ATT_FOREIGN_TABLE);
 			ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_SetCompression: /* ALTER COLUMN SET COMPRESSION */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DropColumn:		/* DROP COLUMN */
-			ATSimplePermissions(rel,
+			ATSimplePermissions(cmd->subtype, rel,
 								ATT_TABLE | ATT_COMPOSITE_TYPE | ATT_FOREIGN_TABLE);
 			ATPrepDropColumn(wqueue, rel, recurse, recursing, cmd,
 							 lockmode, context);
@@ -4530,13 +4530,13 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_DROP;
 			break;
 		case AT_AddIndex:		/* ADD INDEX */
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_ADD_INDEX;
 			break;
 		case AT_AddConstraint:	/* ADD CONSTRAINT */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* Recursion occurs during execution phase */
 			/* No command-specific prep needed except saving recurse flag */
 			if (recurse)
@@ -4544,13 +4544,13 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_ADD_CONSTR;
 			break;
 		case AT_AddIndexConstraint: /* ADD CONSTRAINT USING INDEX */
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_ADD_INDEXCONSTR;
 			break;
 		case AT_DropConstraint: /* DROP CONSTRAINT */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			ATCheckPartitionsNotInUse(rel, lockmode);
 			/* Other recursion occurs during execution phase */
 			/* No command-specific prep needed except saving recurse flag */
@@ -4559,7 +4559,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_DROP;
 			break;
 		case AT_AlterColumnType:	/* ALTER COLUMN TYPE */
-			ATSimplePermissions(rel,
+			ATSimplePermissions(cmd->subtype, rel,
 								ATT_TABLE | ATT_COMPOSITE_TYPE | ATT_FOREIGN_TABLE);
 			/* See comments for ATPrepAlterColumnType */
 			cmd = ATParseTransformCmd(wqueue, tab, rel, cmd, recurse, lockmode,
@@ -4571,7 +4571,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_ALTER_TYPE;
 			break;
 		case AT_AlterColumnGenericOptions:
-			ATSimplePermissions(rel, ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
@@ -4583,13 +4583,13 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			break;
 		case AT_ClusterOn:		/* CLUSTER ON */
 		case AT_DropCluster:	/* SET WITHOUT CLUSTER */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW);
 			/* These commands never recurse */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_SetLogged:		/* SET LOGGED */
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			if (tab->chgPersistence)
 				ereport(ERROR,
 						(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@@ -4604,7 +4604,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_MISC;
 			break;
 		case AT_SetUnLogged:	/* SET UNLOGGED */
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			if (tab->chgPersistence)
 				ereport(ERROR,
 						(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@@ -4619,11 +4619,11 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DropOids:		/* SET WITHOUT OIDS */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			pass = AT_PASS_DROP;
 			break;
 		case AT_SetTableSpace:	/* SET TABLESPACE */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX |
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW | ATT_INDEX |
 								ATT_PARTITIONED_INDEX);
 			/* This command never recurses */
 			ATPrepSetTableSpace(tab, rel, cmd->name, lockmode);
@@ -4632,30 +4632,30 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 		case AT_SetRelOptions:	/* SET (...) */
 		case AT_ResetRelOptions:	/* RESET (...) */
 		case AT_ReplaceRelOptions:	/* reset them all, then set just these */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_VIEW | ATT_MATVIEW | ATT_INDEX);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_VIEW | ATT_MATVIEW | ATT_INDEX);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_AddInherit:		/* INHERIT */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			ATPrepAddInherit(rel);
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DropInherit:	/* NO INHERIT */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* This command never recurses */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_AlterConstraint:	/* ALTER CONSTRAINT */
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* Recursion occurs during execution phase */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_ValidateConstraint: /* VALIDATE CONSTRAINT */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			/* Recursion occurs during execution phase */
 			/* No command-specific prep needed except saving recurse flag */
 			if (recurse)
@@ -4663,7 +4663,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 			pass = AT_PASS_MISC;
 			break;
 		case AT_ReplicaIdentity:	/* REPLICA IDENTITY ... */
-			ATSimplePermissions(rel, ATT_TABLE | ATT_MATVIEW);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_MATVIEW);
 			pass = AT_PASS_MISC;
 			/* This command never recurses */
 			/* No command-specific prep needed */
@@ -4676,7 +4676,7 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 		case AT_DisableTrig:	/* DISABLE TRIGGER variants */
 		case AT_DisableTrigAll:
 		case AT_DisableTrigUser:
-			ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 			if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
 				ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
 			pass = AT_PASS_MISC;
@@ -4691,28 +4691,28 @@ ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
 		case AT_DisableRowSecurity:
 		case AT_ForceRowSecurity:
 		case AT_NoForceRowSecurity:
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* These commands never recurse */
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_GenericOptions:
-			ATSimplePermissions(rel, ATT_FOREIGN_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_FOREIGN_TABLE);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_AttachPartition:
-			ATSimplePermissions(rel, ATT_TABLE | ATT_PARTITIONED_INDEX);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_PARTITIONED_INDEX);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DetachPartition:
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
 		case AT_DetachPartitionFinalize:
-			ATSimplePermissions(rel, ATT_TABLE);
+			ATSimplePermissions(cmd->subtype, rel, ATT_TABLE);
 			/* No command-specific prep needed */
 			pass = AT_PASS_MISC;
 			break;
@@ -5941,6 +5941,145 @@ ATGetQueueEntry(List **wqueue, Relation rel)
 	return tab;
 }
 
+static const char *
+alter_table_type_to_string(AlterTableType cmdtype)
+{
+	switch (cmdtype)
+	{
+		case AT_AddColumn:
+		case AT_AddColumnRecurse:
+		case AT_AddColumnToView:
+			return "ADD COLUMN";
+		case AT_ColumnDefault:
+		case AT_CookedColumnDefault:
+			return "ALTER COLUMN ... SET DEFAULT";
+		case AT_DropNotNull:
+			return "ALTER COLUMN ... DROP NOT NULL";
+		case AT_SetNotNull:
+			return "ALTER COLUMN ... SET NOT NULL";
+		case AT_DropExpression:
+			return "ALTER COLUMN ... DROP EXPRESSION";
+		case AT_CheckNotNull:
+			return NULL;			/* not real grammar */
+		case AT_SetStatistics:
+			return "ALTER COLUMN ... SET STATISTICS";
+		case AT_SetOptions:
+			return "ALTER COLUMN ... SET";
+		case AT_ResetOptions:
+			return "ALTER COLUMN ... RESET";
+		case AT_SetStorage:
+			return "ALTER COLUMN ... SET STORAGE";
+		case AT_SetCompression:
+			return "ALTER COLUMN ... SET COMPRESSION";
+		case AT_DropColumn:
+		case AT_DropColumnRecurse:
+			return "DROP COLUMN";
+		case AT_AddIndex:
+		case AT_ReAddIndex:
+			return NULL;			/* not real grammar */
+		case AT_AddConstraint:
+		case AT_AddConstraintRecurse:
+		case AT_ReAddConstraint:
+		case AT_ReAddDomainConstraint:
+		case AT_AddIndexConstraint:
+			return "ADD CONSTRAINT";
+		case AT_AlterConstraint:
+			return "ALTER CONSTRAINT";
+		case AT_ValidateConstraint:
+		case AT_ValidateConstraintRecurse:
+			return "VALIDATE CONSTRAINT";
+		case AT_DropConstraint:
+		case AT_DropConstraintRecurse:
+			return "DROP CONSTRAINT";
+		case AT_ReAddComment:
+			return NULL;			/* not real grammar */
+		case AT_AlterColumnType:
+			return "ALTER COLUMN ... SET DATA TYPE";
+		case AT_AlterColumnGenericOptions:
+			return "ALTER COLUMN ... OPTIONS";
+		case AT_ChangeOwner:
+			return "OWNER TO";
+		case AT_ClusterOn:
+			return "CLUSTER ON";
+		case AT_DropCluster:
+			return "SET WITHOUT CLUSTER";
+		case AT_SetLogged:
+			return "SET LOGGED";
+		case AT_SetUnLogged:
+			return "SET UNLOGGED";
+		case AT_DropOids:
+			return "SET WITHOUT OIDS";
+		case AT_SetTableSpace:
+			return "SET TABLESPACE";
+		case AT_SetRelOptions:
+			return "SET";
+		case AT_ResetRelOptions:
+			return "RESET";
+		case AT_ReplaceRelOptions:
+			return NULL;			/* not real grammar */
+		case AT_EnableTrig:
+			return "ENABLE TRIGGER";
+		case AT_EnableAlwaysTrig:
+			return "ENABLE ALWAYS TRIGGER";
+		case AT_EnableReplicaTrig:
+			return "ENABLE REPLICA TRIGGER";
+		case AT_DisableTrig:
+			return "DISABLE TRIGGER";
+		case AT_EnableTrigAll:
+			return "ENABLE TRIGGER ALL";
+		case AT_DisableTrigAll:
+			return "DISABLE TRIGGER ALL";
+		case AT_EnableTrigUser:
+			return "ENABLE TRIGGER USER";
+		case AT_DisableTrigUser:
+			return "DISABLE TRIGGER USER";
+		case AT_EnableRule:
+			return "ENABLE RULE";
+		case AT_EnableAlwaysRule:
+			return "ENABLE ALWAYS RULE";
+		case AT_EnableReplicaRule:
+			return "ENABLE REPLICA RULE";
+		case AT_DisableRule:
+			return "DISABLE RULE";
+		case AT_AddInherit:
+			return "INHERIT";
+		case AT_DropInherit:
+			return "NO INHERIT";
+		case AT_AddOf:
+			return "OF";
+		case AT_DropOf:
+			return "NOT OF";
+		case AT_ReplicaIdentity:
+			return "REPLICA IDENTITY";
+		case AT_EnableRowSecurity:
+			return "ENABLE ROW SECURITY";
+		case AT_DisableRowSecurity:
+			return "DISABLE ROW SECURITY";
+		case AT_ForceRowSecurity:
+			return "FORCE ROW SECURITY";
+		case AT_NoForceRowSecurity:
+			return "NO FORCE ROW SECURITY";
+		case AT_GenericOptions:
+			return "OPTIONS";
+		case AT_AttachPartition:
+			return "ATTACH PARTITION";
+		case AT_DetachPartition:
+			return "DETACH PARTITION";
+		case AT_DetachPartitionFinalize:
+			return "DETACH PARTITION ... FINALIZE";
+		case AT_AddIdentity:
+			return "ALTER COLUMN ... ADD IDENTITY";
+		case AT_SetIdentity:
+			return "ALTER COLUMN ... SET";
+		case AT_DropIdentity:
+			return "ALTER COLUMN ... DROP IDENTITY";
+		case AT_ReAddStatistics:
+			return NULL;			/* not real grammar */
+	}
+
+	return NULL;
+}
+
 /*
  * ATSimplePermissions
  *
@@ -5949,7 +6088,7 @@ ATGetQueueEntry(List **wqueue, Relation rel)
  * - Ensure that it is not a system table
  */
 static void
-ATSimplePermissions(Relation rel, int allowed_targets)
+ATSimplePermissions(AlterTableType cmdtype, Relation rel, int allowed_targets)
 {
 	int			actual_target;
 
@@ -5984,7 +6123,21 @@ ATSimplePermissions(Relation rel, int allowed_targets)
 
 	/* Wrong target type? */
 	if ((actual_target & allowed_targets) == 0)
-		ATWrongRelkindError(rel, allowed_targets);
+	{
+		const char *action_str = alter_table_type_to_string(cmdtype);
+
+		if (action_str)
+			ereport(ERROR,
+					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+					 /* translator: %s is a group of some SQL keywords */
+					 errmsg("ALTER action %s cannot be performed on relation \"%s\"",
+							action_str, RelationGetRelationName(rel)),
+					 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
+		else
+			/* internal error? */
+			elog(ERROR, "invalid ALTER action attempted on relation \"%s\"",
+				 RelationGetRelationName(rel));
+	}
 
 	/* Permissions checks */
 	if (!pg_class_ownercheck(RelationGetRelid(rel), GetUserId()))
@@ -5998,66 +6151,6 @@ ATSimplePermissions(Relation rel, int allowed_targets)
 						RelationGetRelationName(rel))));
 }
 
-/*
- * ATWrongRelkindError
- *
- * Throw an error when a relation has been determined to be of the wrong
- * type.
- */
-static void
-ATWrongRelkindError(Relation rel, int allowed_targets)
-{
-	char	   *msg;
-
-	switch (allowed_targets)
-	{
-		case ATT_TABLE:
-			msg = _("\"%s\" is not a table");
-			break;
-		case ATT_TABLE | ATT_VIEW:
-			msg = _("\"%s\" is not a table or view");
-			break;
-		case ATT_TABLE | ATT_VIEW | ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a table, view, or foreign table");
-			break;
-		case ATT_TABLE | ATT_VIEW | ATT_MATVIEW | ATT_INDEX:
-			msg = _("\"%s\" is not a table, view, materialized view, or index");
-			break;
-		case ATT_TABLE | ATT_MATVIEW:
-			msg = _("\"%s\" is not a table or materialized view");
-			break;
-		case ATT_TABLE | ATT_MATVIEW | ATT_INDEX:
-			msg = _("\"%s\" is not a table, materialized view, or index");
-			break;
-		case ATT_TABLE | ATT_MATVIEW | ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a table, materialized view, or foreign table");
-			break;
-		case ATT_TABLE | ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a table or foreign table");
-			break;
-		case ATT_TABLE | ATT_COMPOSITE_TYPE | ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a table, composite type, or foreign table");
-			break;
-		case ATT_TABLE | ATT_MATVIEW | ATT_INDEX | ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a table, materialized view, index, or foreign table");
-			break;
-		case ATT_VIEW:
-			msg = _("\"%s\" is not a view");
-			break;
-		case ATT_FOREIGN_TABLE:
-			msg = _("\"%s\" is not a foreign table");
-			break;
-		default:
-			/* shouldn't get here, add all necessary cases above */
-			msg = _("\"%s\" is of the wrong type");
-			break;
-	}
-
-	ereport(ERROR,
-			(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-			 errmsg(msg, RelationGetRelationName(rel))));
-}
-
 /*
  * ATSimpleRecursion
  *
@@ -6452,7 +6545,7 @@ ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
 
 	/* At top level, permission check was done in ATPrepCmd, else do it */
 	if (recursing)
-		ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+		ATSimplePermissions((*cmd)->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	if (rel->rd_rel->relispartition && !recursing)
 		ereport(ERROR,
@@ -8186,7 +8279,7 @@ ATExecDropColumn(List **wqueue, Relation rel, const char *colName,
 
 	/* At top level, permission check was done in ATPrepCmd, else do it */
 	if (recursing)
-		ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+		ATSimplePermissions(AT_DropColumn, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	/* Initialize addrs on the first invocation */
 	Assert(!recursing || addrs != NULL);
@@ -8670,7 +8763,7 @@ ATAddCheckConstraint(List **wqueue, AlteredTableInfo *tab, Relation rel,
 
 	/* At top level, permission check was done in ATPrepCmd, else do it */
 	if (recursing)
-		ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+		ATSimplePermissions(AT_AddConstraint, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	/*
 	 * Call AddRelationNewConstraints to do the work, making sure it works on
@@ -11286,7 +11379,7 @@ ATExecDropConstraint(Relation rel, const char *constrName,
 
 	/* At top level, permission check was done in ATPrepCmd, else do it */
 	if (recursing)
-		ATSimplePermissions(rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+		ATSimplePermissions(AT_DropConstraint, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	conrel = table_open(ConstraintRelationId, RowExclusiveLock);
 
@@ -13205,8 +13298,9 @@ ATExecChangeOwner(Oid relationOid, Oid newOwnerId, bool recursing, LOCKMODE lock
 		default:
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("\"%s\" is not a table, view, sequence, or foreign table",
-							NameStr(tuple_class->relname))));
+					 errmsg("cannot change owner of relation \"%s\"",
+							NameStr(tuple_class->relname)),
+					 errdetail_relkind_not_supported(tuple_class->relkind)));
 	}
 
 	/*
@@ -13621,8 +13715,9 @@ ATExecSetRelOptions(Relation rel, List *defList, AlterTableType operation,
 		default:
 			ereport(ERROR,
 					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-					 errmsg("\"%s\" is not a table, view, materialized view, index, or TOAST table",
-							RelationGetRelationName(rel))));
+					 errmsg("cannot set options for relation \"%s\"",
+							RelationGetRelationName(rel)),
+					 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 			break;
 	}
 
@@ -14176,7 +14271,7 @@ ATExecAddInherit(Relation child_rel, RangeVar *parent, LOCKMODE lockmode)
 	 * Must be owner of both parent and child -- child was checked by
 	 * ATSimplePermissions call in ATPrepCmd
 	 */
-	ATSimplePermissions(parent_rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+	ATSimplePermissions(AT_AddInherit, parent_rel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	/* Permanent rels cannot inherit from temporary ones */
 	if (parent_rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP &&
@@ -16505,17 +16600,27 @@ RangeVarCallbackForAlterRelation(const RangeVar *rv, Oid relid, Oid oldrelid,
 	 * Don't allow ALTER TABLE .. SET SCHEMA on relations that can't be moved
 	 * to a different schema, such as indexes and TOAST tables.
 	 */
-	if (IsA(stmt, AlterObjectSchemaStmt) &&
-		relkind != RELKIND_RELATION &&
-		relkind != RELKIND_VIEW &&
-		relkind != RELKIND_MATVIEW &&
-		relkind != RELKIND_SEQUENCE &&
-		relkind != RELKIND_FOREIGN_TABLE &&
-		relkind != RELKIND_PARTITIONED_TABLE)
-		ereport(ERROR,
-				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, view, materialized view, sequence, or foreign table",
-						rv->relname)));
+	if (IsA(stmt, AlterObjectSchemaStmt))
+	{
+		if (relkind == RELKIND_INDEX || relkind == RELKIND_PARTITIONED_INDEX)
+			ereport(ERROR,
+					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+					 errmsg("cannot change schema of index \"%s\"",
+							rv->relname),
+					 errhint("Change the schema of the table instead.")));
+		else if (relkind == RELKIND_COMPOSITE_TYPE)
+			ereport(ERROR,
+					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+					 errmsg("cannot change schema of composite type \"%s\"",
+							rv->relname),
+					 errhint("Use ALTER TYPE instead.")));
+		else if (relkind == RELKIND_TOASTVALUE)
+			ereport(ERROR,
+					(errcode(ERRCODE_WRONG_OBJECT_TYPE),
+					 errmsg("cannot change schema of TOAST table \"%s\"",
+							rv->relname),
+					 errhint("Change the schema of the table instead.")));
+	}
 
 	ReleaseSysCache(tuple);
 }
@@ -17077,7 +17182,7 @@ ATExecAttachPartition(List **wqueue, Relation rel, PartitionCmd *cmd,
 	 * Must be owner of both parent and source table -- parent was checked by
 	 * ATSimplePermissions call in ATPrepCmd
 	 */
-	ATSimplePermissions(attachrel, ATT_TABLE | ATT_FOREIGN_TABLE);
+	ATSimplePermissions(AT_AttachPartition, attachrel, ATT_TABLE | ATT_FOREIGN_TABLE);
 
 	/* A partition can only have one parent */
 	if (attachrel->rd_rel->relispartition)

src/backend/commands/trigger.c

@@ -286,8 +286,9 @@ CreateTrigger(CreateTrigStmt *stmt, const char *queryString,
 	else
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table or view",
-						RelationGetRelationName(rel))));
+				 errmsg("relation \"%s\" cannot have triggers",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 	if (!allowSystemTableMods && IsSystemRelation(rel))
 		ereport(ERROR,
@@ -1262,8 +1263,9 @@ RemoveTriggerById(Oid trigOid)
 		rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, view, or foreign table",
-						RelationGetRelationName(rel))));
+				 errmsg("relation \"%s\" cannot have triggers",
+						RelationGetRelationName(rel)),
+				 errdetail_relkind_not_supported(rel->rd_rel->relkind)));
 
 	if (!allowSystemTableMods && IsSystemRelation(rel))
 		ereport(ERROR,
@@ -1368,8 +1370,9 @@ RangeVarCallbackForRenameTrigger(const RangeVar *rv, Oid relid, Oid oldrelid,
 		form->relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, view, or foreign table",
-						rv->relname)));
+				 errmsg("relation \"%s\" cannot have triggers",
+						rv->relname),
+				 errdetail_relkind_not_supported(form->relkind)));
 
 	/* you must own the table to rename one of its triggers */
 	if (!pg_class_ownercheck(relid, GetUserId()))

src/backend/parser/parse_utilcmd.c

@@ -976,8 +976,9 @@ transformTableLikeClause(CreateStmtContext *cxt, TableLikeClause *table_like_cla
 		relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table, view, materialized view, composite type, or foreign table",
-						RelationGetRelationName(relation))));
+				 errmsg("relation \"%s\" is invalid in LIKE clause",
+						RelationGetRelationName(relation)),
+				 errdetail_relkind_not_supported(relation->rd_rel->relkind)));
 
 	cancel_parser_errposition_callback(&pcbstate);
 

src/backend/rewrite/rewriteDefine.c

@@ -268,8 +268,9 @@ DefineQueryRewrite(const char *rulename,
 		event_relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table or view",
-						RelationGetRelationName(event_relation))));
+				 errmsg("relation \"%s\" cannot have rules",
+						RelationGetRelationName(event_relation)),
+				 errdetail_relkind_not_supported(event_relation->rd_rel->relkind)));
 
 	if (!allowSystemTableMods && IsSystemRelation(event_relation))
 		ereport(ERROR,
@@ -935,7 +936,8 @@ RangeVarCallbackForRenameRule(const RangeVar *rv, Oid relid, Oid oldrelid,
 		form->relkind != RELKIND_PARTITIONED_TABLE)
 		ereport(ERROR,
 				(errcode(ERRCODE_WRONG_OBJECT_TYPE),
-				 errmsg("\"%s\" is not a table or view", rv->relname)));
+				 errmsg("relation \"%s\" cannot have rules", rv->relname),
+				 errdetail_relkind_not_supported(form->relkind)));
 
 	if (!allowSystemTableMods && IsSystemClass(relid, form))
 		ereport(ERROR,

src/include/catalog/pg_class.h

@@ -198,6 +198,7 @@ DECLARE_INDEX(pg_class_tblspc_relfilenode_index, 3455, ClassTblspcRelfilenodeInd
 	 (relkind) == RELKIND_TOASTVALUE || \
 	 (relkind) == RELKIND_MATVIEW)
 
+extern int errdetail_relkind_not_supported(char relkind);
 
 #endif							/* EXPOSE_TO_CLIENT_CODE */
 

src/test/regress/expected/alter_table.out

@@ -1087,9 +1087,11 @@ ERROR:  column "bar" of relation "atacc1" does not exist
 -- try creating a view and altering that, should fail
 create view myview as select * from atacc1;
 alter table myview alter column test drop not null;
-ERROR:  "myview" is not a table or foreign table
+ERROR:  ALTER action ALTER COLUMN ... DROP NOT NULL cannot be performed on relation "myview"
+DETAIL:  This operation is not supported for views.
 alter table myview alter column test set not null;
-ERROR:  "myview" is not a table or foreign table
+ERROR:  ALTER action ALTER COLUMN ... SET NOT NULL cannot be performed on relation "myview"
+DETAIL:  This operation is not supported for views.
 drop view myview;
 drop table atacc1;
 -- set not null verified by constraints
@@ -1387,7 +1389,8 @@ select * from myview;
 (0 rows)
 
 alter table myview drop d;
-ERROR:  "myview" is not a table, composite type, or foreign table
+ERROR:  ALTER action DROP COLUMN cannot be performed on relation "myview"
+DETAIL:  This operation is not supported for views.
 drop view myview;
 -- test some commands to make sure they fail on the dropped column
 analyze atacc1(a);

src/test/regress/expected/create_table_like.out

@@ -504,9 +504,10 @@ DROP TABLE noinh_con_copy, noinh_con_copy1;
 CREATE TABLE ctlt4 (a int, b text);
 CREATE SEQUENCE ctlseq1;
 CREATE TABLE ctlt10 (LIKE ctlseq1);  -- fail
-ERROR:  "ctlseq1" is not a table, view, materialized view, composite type, or foreign table
+ERROR:  relation "ctlseq1" is invalid in LIKE clause
 LINE 1: CREATE TABLE ctlt10 (LIKE ctlseq1);
                                   ^
+DETAIL:  This operation is not supported for sequences.
 CREATE VIEW ctlv1 AS SELECT * FROM ctlt4;
 CREATE TABLE ctlt11 (LIKE ctlv1);
 CREATE TABLE ctlt11a (LIKE ctlv1 INCLUDING ALL);

src/test/regress/expected/foreign_data.out

@@ -740,7 +740,8 @@ FDW options: (delimiter ',', quote '"', "be quoted" 'value')
 (1 row)
 
 CREATE INDEX id_ft1_c2 ON ft1 (c2);                             -- ERROR
-ERROR:  cannot create index on foreign table "ft1"
+ERROR:  cannot create index on relation "ft1"
+DETAIL:  This operation is not supported for foreign tables.
 SELECT * FROM ft1;                                              -- ERROR
 ERROR:  foreign-data wrapper "dummy" has no handler
 EXPLAIN SELECT * FROM ft1;                                      -- ERROR
@@ -864,7 +865,8 @@ LINE 1: ALTER FOREIGN TABLE ft1 ADD PRIMARY KEY (c7);
                                     ^
 ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c9_check CHECK (c9 < 0) NOT VALID;
 ALTER FOREIGN TABLE ft1 ALTER CONSTRAINT ft1_c9_check DEFERRABLE; -- ERROR
-ERROR:  "ft1" is not a table
+ERROR:  ALTER action ALTER CONSTRAINT cannot be performed on relation "ft1"
+DETAIL:  This operation is not supported for foreign tables.
 ALTER FOREIGN TABLE ft1 DROP CONSTRAINT ft1_c9_check;
 ALTER FOREIGN TABLE ft1 DROP CONSTRAINT no_const;               -- ERROR
 ERROR:  constraint "no_const" of relation "ft1" does not exist

src/test/regress/expected/indexing.out

@@ -137,7 +137,8 @@ select relname, relpartbound from pg_class
 (2 rows)
 
 alter table idxpart_c detach partition idxpart1_c;
-ERROR:  "idxpart_c" is not a table
+ERROR:  ALTER action DETACH PARTITION cannot be performed on relation "idxpart_c"
+DETAIL:  This operation is not supported for partitioned indexes.
 drop table idxpart;
 -- If a partition already has an index, don't create a duplicative one
 create table idxpart (a int, b int) partition by range (a, b);

src/test/regress/expected/sequence.out

@@ -21,7 +21,8 @@ CREATE SEQUENCE sequence_testx OWNED BY nobody;  -- nonsense word
 ERROR:  invalid OWNED BY option
 HINT:  Specify OWNED BY table.column or OWNED BY NONE.
 CREATE SEQUENCE sequence_testx OWNED BY pg_class_oid_index.oid;  -- not a table
-ERROR:  referenced relation "pg_class_oid_index" is not a table or foreign table
+ERROR:  sequence cannot be owned by relation "pg_class_oid_index"
+DETAIL:  This operation is not supported for indexes.
 CREATE SEQUENCE sequence_testx OWNED BY pg_class.relname;  -- not same schema
 ERROR:  sequence must be in same schema as table it is linked to
 CREATE TABLE sequence_test_table (a int);

src/test/regress/expected/stats_ext.out

@@ -211,14 +211,18 @@ CREATE TABLE tststats.pt (a int, b int, c text) PARTITION BY RANGE (a, b);
 CREATE TABLE tststats.pt1 PARTITION OF tststats.pt FOR VALUES FROM (-10, -10) TO (10, 10);
 CREATE STATISTICS tststats.s1 ON a, b FROM tststats.t;
 CREATE STATISTICS tststats.s2 ON a, b FROM tststats.ti;
-ERROR:  relation "ti" is not a table, foreign table, or materialized view
+ERROR:  cannot define statistics for relation "ti"
+DETAIL:  This operation is not supported for indexes.
 CREATE STATISTICS tststats.s3 ON a, b FROM tststats.s;
-ERROR:  relation "s" is not a table, foreign table, or materialized view
+ERROR:  cannot define statistics for relation "s"
+DETAIL:  This operation is not supported for sequences.
 CREATE STATISTICS tststats.s4 ON a, b FROM tststats.v;
-ERROR:  relation "v" is not a table, foreign table, or materialized view
+ERROR:  cannot define statistics for relation "v"
+DETAIL:  This operation is not supported for views.
 CREATE STATISTICS tststats.s5 ON a, b FROM tststats.mv;
 CREATE STATISTICS tststats.s6 ON a, b FROM tststats.ty;
-ERROR:  relation "ty" is not a table, foreign table, or materialized view
+ERROR:  cannot define statistics for relation "ty"
+DETAIL:  This operation is not supported for composite types.
 CREATE STATISTICS tststats.s7 ON a, b FROM tststats.f;
 CREATE STATISTICS tststats.s8 ON a, b FROM tststats.pt;
 CREATE STATISTICS tststats.s9 ON a, b FROM tststats.pt1;