Can build indexes on new columns

storage_engine/src/store_header.rs

@@ -115,4 +115,12 @@ impl StoreHeader {
         self.deleted_count += 1;
         self.deleted_count
     }
+
+    pub fn is_column_indexed(&self, column: Column) -> bool {
+        self.indexed_columns[column as usize]
+    }
+
+    pub fn make_column_indexed(&mut self, column: Column) {
+        self.indexed_columns[column as usize] = true
+    }
 }