diff --git a/doc/src/sgml/catalogs.sgml b/doc/src/sgml/catalogs.sgml
index e39612f..9391922 100644
--- a/doc/src/sgml/catalogs.sgml
+++ b/doc/src/sgml/catalogs.sgml
@@ -6399,10 +6399,12 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
        <structfield>pubgencols</structfield> <type>char</type>
       </para>
       <para>
-       <literal>n</literal> indicates that the generated columns in the tables
-       associated with the publication should not be replicated.
-       <literal>s</literal> indicates that the stored generated columns in the
-       tables associated with the publication should be replicated.
+       Indicates how to handle generated column replication when there is no
+       publication column list:
+       <literal>n</literal> = generated columns in the tables associated with
+       the publication should not be replicated;
+       <literal>s</literal> = stored generated columns in the tables associated
+       with the publication should be replicated.
       </para></entry>
      </row>
 
diff --git a/src/backend/commands/publicationcmds.c b/src/backend/commands/publicationcmds.c
index b49d9ab..1c51356 100644
--- a/src/backend/commands/publicationcmds.c
+++ b/src/backend/commands/publicationcmds.c
@@ -70,7 +70,7 @@ static void PublicationDropTables(Oid pubid, List *rels, bool missing_ok);
 static void PublicationAddSchemas(Oid pubid, List *schemas, bool if_not_exists,
 								  AlterPublicationStmt *stmt);
 static void PublicationDropSchemas(Oid pubid, List *schemas, bool missing_ok);
-static char defGetGeneratedColsOption(DefElem *def);
+static PublishGencolsType defGetGeneratedColsOption(DefElem *def);
 
 
 static void
@@ -81,7 +81,7 @@ parse_publication_options(ParseState *pstate,
 						  bool *publish_via_partition_root_given,
 						  bool *publish_via_partition_root,
 						  bool *publish_generated_columns_given,
-						  char *publish_generated_columns)
+						  PublishGencolsType *publish_generated_columns)
 {
 	ListCell   *lc;
 
@@ -777,7 +777,7 @@ CreatePublication(ParseState *pstate, CreatePublicationStmt *stmt)
 	bool		publish_via_partition_root_given;
 	bool		publish_via_partition_root;
 	bool		publish_generated_columns_given;
-	char		publish_generated_columns;
+	PublishGencolsType		publish_generated_columns;
 	AclResult	aclresult;
 	List	   *relations = NIL;
 	List	   *schemaidlist = NIL;
@@ -837,7 +837,7 @@ CreatePublication(ParseState *pstate, CreatePublicationStmt *stmt)
 	values[Anum_pg_publication_pubviaroot - 1] =
 		BoolGetDatum(publish_via_partition_root);
 	values[Anum_pg_publication_pubgencols_type - 1] =
-		CharGetDatum(publish_generated_columns);
+		CharGetDatum((char)publish_generated_columns);
 
 	tup = heap_form_tuple(RelationGetDescr(rel), values, nulls);
 
@@ -924,7 +924,7 @@ AlterPublicationOptions(ParseState *pstate, AlterPublicationStmt *stmt,
 	bool		publish_via_partition_root_given;
 	bool		publish_via_partition_root;
 	bool		publish_generated_columns_given;
-	char		publish_generated_columns;
+	PublishGencolsType	publish_generated_columns;
 	ObjectAddress obj;
 	Form_pg_publication pubform;
 	List	   *root_relids = NIL;
@@ -1048,7 +1048,7 @@ AlterPublicationOptions(ParseState *pstate, AlterPublicationStmt *stmt,
 
 	if (publish_generated_columns_given)
 	{
-		values[Anum_pg_publication_pubgencols_type - 1] = CharGetDatum(publish_generated_columns);
+		values[Anum_pg_publication_pubgencols_type - 1] = CharGetDatum((char)publish_generated_columns);
 		replaces[Anum_pg_publication_pubgencols_type - 1] = true;
 	}
 
@@ -2050,7 +2050,7 @@ AlterPublicationOwner_oid(Oid subid, Oid newOwnerId)
  * Extract the publish_generated_columns option value from a DefElem. "stored"
  * and "none" values are accepted.
  */
-static char
+static PublishGencolsType
 defGetGeneratedColsOption(DefElem *def)
 {
 	char	   *sval;