const SPECULATIVE_FAILURES_PER_TOKEN: usize = 100;Expand description
Per-token cap on Parser::maybe_parse failures. Bounded by token
count so deeply nested but valid SQL (e.g. parallel-workload generated
queries with thousands of nested casts) has room to speculate, while
still cutting off exponential backtracking on pathological input
(the DoS case is 2^N failures on ~200 tokens; this cap is linear).