From 0744d4fbb8a70a509610cc9eb4e5a87ce663b7a8 Mon Sep 17 00:00:00 2001
From: LucaCappelletti94 <cappelletti.luca94@gmail.com>
Date: Wed, 11 Nov 2026 22:55:39 +0100
Subject: [PATCH] PostgreSQL: Support `STATISTICS` members in `ALTER EXTENSION`

---
 fuzz/fuzz_seeds/postgres_alter_extension.sql | 1 +
 src/ast/ddl.rs                               | 3 +++
 src/parser/mod.rs                            | 4 ++++
 tests/sqlparser_postgres.rs                  | 2 ++
 4 files changed, 10 insertions(+)

diff --git a/fuzz/fuzz_seeds/postgres_alter_extension.sql b/fuzz/fuzz_seeds/postgres_alter_extension.sql
index 50c5de020d..f488e93162 100644
--- a/fuzz/fuzz_seeds/postgres_alter_extension.sql
+++ b/fuzz/fuzz_seeds/postgres_alter_extension.sql
@@ -23,3 +23,4 @@ ALTER EXTENSION citext ADD EXTENSION other_ext;
 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;
diff --git a/src/ast/ddl.rs b/src/ast/ddl.rs
index f6b6333222..561edf20d4 100644
--- a/src/ast/ddl.rs
+++ b/src/ast/ddl.rs
@@ -4967,6 +4967,8 @@ pub enum AlterExtensionMember {
     Sequence(ObjectName),
     /// `SERVER object_name`
     Server(Ident),
+    /// `STATISTICS object_name`
+    Statistics(ObjectName),
     /// `TABLE object_name`
     Table(ObjectName),
     /// `TEXT SEARCH CONFIGURATION object_name`
@@ -5027,6 +5029,7 @@ impl fmt::Display for AlterExtensionMember {
             AlterExtensionMember::Schema(name) => write!(f, "SCHEMA {name}"),
             AlterExtensionMember::Sequence(name) => write!(f, "SEQUENCE {name}"),
             AlterExtensionMember::Server(name) => write!(f, "SERVER {name}"),
+            AlterExtensionMember::Statistics(name) => write!(f, "STATISTICS {name}"),
             AlterExtensionMember::Table(name) => write!(f, "TABLE {name}"),
             AlterExtensionMember::TextSearchConfiguration(name) => {
                 write!(f, "TEXT SEARCH CONFIGURATION {name}")
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 7bc1a857a2..07c1ec0427 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -12591,6 +12591,10 @@ impl<'a> Parser<'a> {
             ))
         } else if self.parse_keyword(Keyword::SERVER) {
             Ok(AlterExtensionMember::Server(self.parse_identifier()?))
+        } else if self.parse_keyword(Keyword::STATISTICS) {
+            Ok(AlterExtensionMember::Statistics(
+                self.parse_object_name(false)?,
+            ))
         } 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 618e122bec..52872f1a6d 100644
--- a/tests/sqlparser_postgres.rs
+++ b/tests/sqlparser_postgres.rs
@@ -13547,6 +13547,7 @@ fn alter_extension_member_round_trip_forms(action: &str) {
         format!("ALTER EXTENSION ext_name {action} SCHEMA schema_name"),
         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} TABLE t"),
         format!("ALTER EXTENSION ext_name {action} TABLE schema.t"),
         format!("ALTER EXTENSION ext_name {action} TEXT SEARCH CONFIGURATION cfg"),
@@ -13746,6 +13747,7 @@ fn parse_alter_extension_add_member() {
         "SCHEMA",
         "SEQUENCE",
         "SERVER",
+        "STATISTICS",
         "TABLE",
         "TEXT SEARCH CONFIGURATION",
         "TEXT SEARCH DICTIONARY",