Jit code compilation during runtime based on runtime statistics

A method comprising:

• generating, by a database execution engine, a query plan including a plurality of operators;
• inserting, by the database execution engine, an enforce compilation operator into the query plan that includes the plurality of operators, the plurality of operators comprising a first operator, the enforce compilation operator, and a second operator;
• executing at least the first operator of the query plan;
• in response to executing the first operator, evaluating, by the database execution engine, an output of the first operator to determine whether a condition is satisfied;
• and
• in response to the condition being satisfied, triggering, by the database execution engine, a just-in-time compilation of the second operator.

A non-transitory computer-readable storage medium storing instructions which, when executed by at least one data processor, cause operations comprising:

• generating, by a database execution engine, a query plan including a plurality of operators;
• inserting, by the database execution engine, an enforce compilation operator into the query plan that includes the plurality of operators, the plurality of operators comprising a first operator, the enforce compilation operator, and a second operator;
• executing at least the first operator of the query plan;
• in response to executing the first operator, evaluating, by the database execution engine, an output of the first operator to determine whether a condition is satisfied;
• and
• in response to the condition being satisfied, triggering, by the database execution engine, a just-in-time compilation of the second operator.