commit c8cc85910054c535df1c88b263a6d4ed28eaa940
Author: kaiwang.ckw <kaiwang.ckw@alibaba-inc.com>
Date:   Tue Nov 3 19:28:29 2020 +0800

    BUG#101430 INVALID NUMBER 2e308 IN OPT TRACE FOR FORCE INDEX

diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index ce19c58..85dd9ab 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -3909,6 +3909,13 @@ int test_quick_select(THD *thd, Key_map keys_to_use, table_map prev_tables,
   Cost_estimate cost_est = head->file->table_scan_cost();
   cost_est.add_io(1.1);
   cost_est.add_cpu(scan_time);
+
+  Opt_trace_context *const trace = &thd->opt_trace;
+  Opt_trace_object trace_range(trace, "range_analysis");
+  Opt_trace_object(trace, "table_scan")
+      .add("rows", head->file->stats.records)
+      .add("cost", cost_est);
+
   if (head->force_index) {
     scan_time = DBL_MAX;
     cost_est.set_max_cost();
@@ -3922,12 +3929,6 @@ int test_quick_select(THD *thd, Key_map keys_to_use, table_map prev_tables,
   } else if (cost_est.total_cost() <= 2.0 && !force_quick_range)
     DBUG_RETURN(0); /* No need for quick select */

-  Opt_trace_context *const trace = &thd->opt_trace;
-  Opt_trace_object trace_range(trace, "range_analysis");
-  Opt_trace_object(trace, "table_scan")
-      .add("rows", head->file->stats.records)
-      .add("cost", cost_est);
-
   keys_to_use.intersect(head->keys_in_use_for_query);
   if (!keys_to_use.is_clear_all()) {
     MEM_ROOT alloc;