core: Fix codegen for rowid alias

We should emit `Column` bytecode for a primary key, unless it is an alias for a rowid.

core/schema.rs

@@ -154,6 +154,13 @@ pub struct Column {
     pub primary_key: bool,
 }
 
+impl Column {
+    pub fn is_rowid_alias(&self) -> bool {
+        self.primary_key && self.ty == Type::Integer
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub enum Type {
     Null,
     Text,

core/translate.rs

@@ -174,7 +174,7 @@ fn translate_columns(
             sqlite3_parser::ast::ResultColumn::Star => {
                 for (i, col) in table.unwrap().columns.iter().enumerate() {
                     let dest = program.alloc_register();
-                    if col.primary_key {
+                    if col.is_rowid_alias() {
                         program.emit_insn(Insn::RowId {
                             cursor_id: cursor_id.unwrap(),
                             dest,