Copy avoidance via static analysis for DBMS querying

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause:

• configuring, in a polyglot database management system (DBMS) that contains a guest language runtime environment, a database buffer that the guest language runtime environment does not manage;
• invoking, in the polyglot DBMS, logic that is defined in a guest language to retrieve, into the database buffer that the guest language runtime environment does not manage, a value stored in a database in the polyglot DBMS, wherein the logic contains a plurality of database invocations;
• assigning a color respectively to each database invocation of the plurality of database invocations;
• and
• executing, based on the colors of the database invocations, the logic without, after the retrieved value is overwritten in the database buffer, retaining a retained copy of the retrieved value in a memory region that the guest language runtime environment manages.