The test arithmetic_expression_constant_folding.js generates a set of random floating point numbers and multiplies them together using both unoptimized and optimized (constant-folded) versions of the same query. Currently it asserts that the two results must be identical, but due to precision limitations they can differ by an infinitesimal amount, e.g. from pre-computing partial results at constant folding time versus multiplying strictly left-to-right in the unoptimized case.

Instead this needs to test for approximate equality to avoid false failures.