You are working on the jflatdb/jflatdb repository. The source code is checked out at /testbed at commit…

You are working on the jflatdb/jflatdb repository. The source code is checked out at /testbed at commit…: a task in SWE-Lego-RL-2699 (Harbor dataset). Adding a sum(column) method will expand the set of aggregate functions and bring it closer to standard SQL-like functionality.