Throw a more on-point error for publications depending on columns.

Same as 42b041243, except that the trouble case is a publication
WHERE clause that depends on a column.

Again reported by Alexander Lakhin.  Back-patch to v15 where
we added publication WHERE clauses.

Discussion: https://postgr.es/m/548a47bc-87ae-b3df-c6a2-60b9966f808b@gmail.com

src/backend/commands/tablecmds.c

@@ -46,6 +46,7 @@
 #include "catalog/pg_opclass.h"
 #include "catalog/pg_policy.h"
 #include "catalog/pg_proc.h"
+#include "catalog/pg_publication_rel.h"
 #include "catalog/pg_rewrite.h"
 #include "catalog/pg_statistic_ext.h"
 #include "catalog/pg_tablespace.h"
@@ -14227,6 +14228,21 @@ RememberAllDependentForRebuilding(AlteredTableInfo *tab, AlterTableType subtype,
 				RememberStatisticsForRebuilding(foundObject.objectId, tab);
 				break;
 
+			case PublicationRelRelationId:
+
+				/*
+				 * Column reference in a PUBLICATION ... FOR TABLE ... WHERE
+				 * clause.  Same issues as above.  FIXME someday.
+				 */
+				if (subtype == AT_AlterColumnType)
+					ereport(ERROR,
+							(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+							 errmsg("cannot alter type of a column used by a publication WHERE clause"),
+							 errdetail("%s depends on column \"%s\"",
+									   getObjectDescription(&foundObject, false),
+									   colName)));
+				break;
+
 			default:
 
 				/*