From 245c2eca27f6926106f9999a9ac6a7925b8d084d Mon Sep 17 00:00:00 2001
From: Ayman Elkfrawy <ayman@sigmacomputing.com>
Date: Thu, 5 Feb 2026 11:15:15 -0800
Subject: [PATCH] respect alias explicit settings

---
 src/ast/query.rs          |  2 +-
 tests/sqlparser_common.rs | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/ast/query.rs b/src/ast/query.rs
index e720f23b5..f6146e629 100644
--- a/src/ast/query.rs
+++ b/src/ast/query.rs
@@ -1945,7 +1945,7 @@ impl fmt::Display for TableFactor {
             TableFactor::PassThroughQuery { query, alias } => {
                 write!(f, "({query})")?;
                 if let Some(alias) = alias {
-                    write!(f, " AS {alias}")?;
+                    write!(f, " {alias}")?;
                 }
                 Ok(())
             }
diff --git a/tests/sqlparser_common.rs b/tests/sqlparser_common.rs
index 4a72e6b8e..6104fe76e 100644
--- a/tests/sqlparser_common.rs
+++ b/tests/sqlparser_common.rs
@@ -15219,6 +15219,30 @@ fn ast_with_pass_through_query() {
         }),
     };
 
+    // After modifying the AST, the SQL representation should be different
+    assert_eq!(ast.to_string(), "SELECT * FROM (SELECT * FROM tx) ty");
+}
+
+#[test]
+fn ast_with_pass_through_query_with_explicit_alias() {
+    let sql = "SELECT * FROM t1 AS t2";
+    let mut ast = all_dialects().verified_stmt(sql);
+    let Statement::Query(ref mut query) = ast else {
+        panic!("Expected Query");
+    };
+    let SetExpr::Select(ref mut select) = *query.body else {
+        panic!("Expected SetExpr::Select");
+    };
+    let from = select.from.get_mut(0).unwrap();
+    from.relation = TableFactor::PassThroughQuery {
+        query: "SELECT * FROM tx".to_string(),
+        alias: Some(TableAlias {
+            explicit: true,
+            name: Ident::new("ty"),
+            columns: vec![],
+        }),
+    };
+
     // After modifying the AST, the SQL representation should be different
     assert_eq!(ast.to_string(), "SELECT * FROM (SELECT * FROM tx) AS ty");
 }