MDEV-36586 USER_STATISTICS.BUSY_TIME is in microseconds

the bug was that MDEV-35720 missed two lines

followup for 95975b9

Author: vuvova

mysql-test/main/userstat.result

@@ -247,6 +247,11 @@ select f() from information_schema.index_statistics;
 ERROR 21000: Subquery returns more than 1 row
 set global userstat= 0;
 drop function f;
-#
 # End of 10.2 tests
 #
+# MDEV-36586 USER_STATISTICS.BUSY_TIME is in microseconds
+#
+select distinct busy_time>1e5, cpu_time>1e5 from information_schema.user_statistics;
+busy_time>1e5	cpu_time>1e5
+0	0
+# End of 10.11 tests

mysql-test/main/userstat.test

@@ -135,6 +135,11 @@ set global userstat= 0;
 drop function f;
 --enable_ps2_protocol
 
---echo #
 --echo # End of 10.2 tests
+
 --echo #
+--echo # MDEV-36586 USER_STATISTICS.BUSY_TIME is in microseconds
+--echo #
+select distinct busy_time>1e5, cpu_time>1e5 from information_schema.user_statistics;
+
+--echo # End of 10.11 tests

plugin/userstat/client_stats.cc

@@ -45,8 +45,8 @@ static int send_user_stats(THD* thd, HASH *all_user_stats, TABLE *table)
     table->field[j++]->store((longlong)user_stats->total_connections,TRUE);
     table->field[j++]->store((longlong)user_stats->concurrent_connections, TRUE);
     table->field[j++]->store((longlong)user_stats->connected_time, TRUE);
-    table->field[j++]->store((double)user_stats->busy_time);
-    table->field[j++]->store((double)user_stats->cpu_time);
+    table->field[j++]->store((double)user_stats->busy_time/1e6);
+    table->field[j++]->store((double)user_stats->cpu_time/1e6);
     table->field[j++]->store((longlong)user_stats->bytes_received, TRUE);
     table->field[j++]->store((longlong)user_stats->bytes_sent, TRUE);
     table->field[j++]->store((longlong)user_stats->binlog_bytes_written, TRUE);