add alias to colnames explicitly as column-N

Author: Pavan-Nambi

core/translate/select.rs

@@ -518,7 +518,7 @@ fn prepare_one_select_plan(
                 result_columns.push(ResultSetColumn {
                     // these result_columns work as placeholders for the values, so the expr doesn't matter
                     expr: ast::Expr::Literal(ast::Literal::Numeric(i.to_string())),
-                    alias: None,
+                    alias: Some(format!("column{}", i + 1)),
                     contains_aggregates: false,
                 });
             }

testing/select.test

@@ -1244,6 +1244,11 @@ do_execsql_test_on_specific_db {:memory:} affinity-conversion-2 {
   SELECT * FROM t WHERE a == 2;
 } {2}
 
+ # https://github.com/tursodatabase/turso/issues/3950
+do_execsql_test select-values-column-name {
+  SELECT column1 FROM (VALUES(123));
+} {123}
+
 # Test suite for SQLite affinity conversion in WHERE clauses
 
 # ============================================
@@ -1469,3 +1474,4 @@ do_execsql_test_on_specific_db {:memory:} affinity-conversion-22 {
 #   CREATE INDEX idx20 ON t20(lower(name));
 #   SELECT * FROM t20 WHERE lower(name) = 'abc';
 # } {ABC abc}
+