From 9b82f5e81e11fcf02435a6b85523cf3ae42265cb Mon Sep 17 00:00:00 2001
From: LucaCappelletti94 <cappelletti.luca94@gmail.com>
Date: Wed, 11 Nov 2026 22:56:30 +0100
Subject: [PATCH] PostgreSQL: Support `SUBSCRIPTION` members in `ALTER
 EXTENSION`

---
 fuzz/fuzz_seeds/postgres_alter_extension.sql | 1 +
 src/ast/ddl.rs                               | 3 +++
 src/keywords.rs                              | 1 +
 src/parser/mod.rs                            | 2 ++
 tests/sqlparser_postgres.rs                  | 2 ++
 5 files changed, 9 insertions(+)

diff --git a/fuzz/fuzz_seeds/postgres_alter_extension.sql b/fuzz/fuzz_seeds/postgres_alter_extension.sql
index f488e93162..2632b41897 100644
--- a/fuzz/fuzz_seeds/postgres_alter_extension.sql
+++ b/fuzz/fuzz_seeds/postgres_alter_extension.sql
@@ -24,3 +24,4 @@ ALTER EXTENSION citext DROP INDEX public.idx;
 ALTER EXTENSION citext ADD PUBLICATION pub;
 ALTER EXTENSION citext ADD ROLE role_name;
 ALTER EXTENSION citext DROP STATISTICS public.st;
+ALTER EXTENSION citext DROP SUBSCRIPTION sub;
diff --git a/src/ast/ddl.rs b/src/ast/ddl.rs
index 561edf20d4..53c4085c4a 100644
--- a/src/ast/ddl.rs
+++ b/src/ast/ddl.rs
@@ -4969,6 +4969,8 @@ pub enum AlterExtensionMember {
     Server(Ident),
     /// `STATISTICS object_name`
     Statistics(ObjectName),
+    /// `SUBSCRIPTION object_name`
+    Subscription(Ident),
     /// `TABLE object_name`
     Table(ObjectName),
     /// `TEXT SEARCH CONFIGURATION object_name`
@@ -5030,6 +5032,7 @@ impl fmt::Display for AlterExtensionMember {
             AlterExtensionMember::Sequence(name) => write!(f, "SEQUENCE {name}"),
             AlterExtensionMember::Server(name) => write!(f, "SERVER {name}"),
             AlterExtensionMember::Statistics(name) => write!(f, "STATISTICS {name}"),
+            AlterExtensionMember::Subscription(name) => write!(f, "SUBSCRIPTION {name}"),
             AlterExtensionMember::Table(name) => write!(f, "TABLE {name}"),
             AlterExtensionMember::TextSearchConfiguration(name) => {
                 write!(f, "TEXT SEARCH CONFIGURATION {name}")
diff --git a/src/keywords.rs b/src/keywords.rs
index 9e6cf5562b..3dfc04f476 100644
--- a/src/keywords.rs
+++ b/src/keywords.rs
@@ -1056,6 +1056,7 @@ define_keywords!(
     STYPE,
     SUBMULTISET,
     SUBSCRIPT,
+    SUBSCRIPTION,
     SUBSTR,
     SUBSTRING,
     SUBSTRING_REGEX,
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 07c1ec0427..487887b8d9 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -12595,6 +12595,8 @@ impl<'a> Parser<'a> {
             Ok(AlterExtensionMember::Statistics(
                 self.parse_object_name(false)?,
             ))
+        } else if self.parse_keyword(Keyword::SUBSCRIPTION) {
+            Ok(AlterExtensionMember::Subscription(self.parse_identifier()?))
         } else if self.parse_keyword(Keyword::TABLE) {
             Ok(AlterExtensionMember::Table(self.parse_object_name(false)?))
         } else if self.parse_keywords(&[Keyword::TEXT, Keyword::SEARCH, Keyword::CONFIGURATION]) {
diff --git a/tests/sqlparser_postgres.rs b/tests/sqlparser_postgres.rs
index 52872f1a6d..4da405bbfe 100644
--- a/tests/sqlparser_postgres.rs
+++ b/tests/sqlparser_postgres.rs
@@ -13548,6 +13548,7 @@ fn alter_extension_member_round_trip_forms(action: &str) {
         format!("ALTER EXTENSION ext_name {action} SEQUENCE seq"),
         format!("ALTER EXTENSION ext_name {action} SERVER srv"),
         format!("ALTER EXTENSION ext_name {action} STATISTICS stats"),
+        format!("ALTER EXTENSION ext_name {action} SUBSCRIPTION sub"),
         format!("ALTER EXTENSION ext_name {action} TABLE t"),
         format!("ALTER EXTENSION ext_name {action} TABLE schema.t"),
         format!("ALTER EXTENSION ext_name {action} TEXT SEARCH CONFIGURATION cfg"),
@@ -13748,6 +13749,7 @@ fn parse_alter_extension_add_member() {
         "SEQUENCE",
         "SERVER",
         "STATISTICS",
+        "SUBSCRIPTION",
         "TABLE",
         "TEXT SEARCH CONFIGURATION",
         "TEXT SEARCH DICTIONARY",