
             Description
             Traces all instrumentation within Performance Schema for a specific
             Statement Digest.
             When finding a statement of interest within the
             performance_schema.events_statements_summary_by_digest table, feed
             the DIGEST MD5 value in to this procedure, set how long to poll for,
             and at what interval to poll, and it will generate a report of all
             statistics tracked within Performance Schema for that digest for the
             interval.
             It will also attempt to generate an EXPLAIN for the longest running
             example of the digest during the interval. Note this may fail, as:
                * Performance Schema truncates long SQL_TEXT values (and hence the
                  EXPLAIN will fail due to parse errors)
                * the default schema is sys (so tables that are not fully qualified
                  in the query may not be found)
                * some queries such as SHOW are not supported in EXPLAIN.
             When the EXPLAIN fails, the error will be ignored and no EXPLAIN
             output generated.
             Requires the SUPER privilege for "SET sql_log_bin = 0;".
             Parameters
             in_digest (VARCHAR(32)):
               The statement digest identifier you would like to analyze
             in_runtime (INT):
               The number of seconds to run analysis for
             in_interval (DECIMAL(2,2)):
               The interval (in seconds, may be fractional) at which to try
               and take snapshots
             in_start_fresh (BOOLEAN):
               Whether to TRUNCATE the events_statements_history_long and
               events_stages_history_long tables before starting
             in_auto_enable (BOOLEAN):
               Whether to automatically turn on required consumers
             Example
             mysql> call ps_trace_statement_digest('891ec6860f98ba46d89dd20b0c03652c', 10, 0.1, true, true);
             +--------------------+
             | SUMMARY STATISTICS |
             +--------------------+
             | SUMMARY STATISTICS |
             +--------------------+
             1 row in set (9.11 sec)
             +------------+-----------+-----------+-----------+---------------+------------+------------+
             | executions | exec_time | lock_time | rows_sent | rows_examined | tmp_tables | full_scans |
             +------------+-----------+-----------+-----------+---------------+------------+------------+
             |         21 | 4.11 ms   | 2.00 ms   |         0 |            21 |          0 |          0 |
             +------------+-----------+-----------+-----------+---------------+------------+------------+
             1 row in set (9.11 sec)
             +------------------------------------------+-------+-----------+
             | event_name                               | count | latency   |
             +------------------------------------------+-------+-----------+
             | stage/sql/checking query cache for query |    16 | 724.37 us |
             | stage/sql/statistics                     |    16 | 546.92 us |
             | stage/sql/freeing items                  |    18 | 520.11 us |
             | stage/sql/init                           |    51 | 466.80 us |
             ...
             | stage/sql/cleaning up                    |    18 | 11.92 us  |
             | stage/sql/executing                      |    16 | 6.95 us   |
             +------------------------------------------+-------+-----------+
             17 rows in set (9.12 sec)
             +---------------------------+
             | LONGEST RUNNING STATEMENT |
             +---------------------------+
             | LONGEST RUNNING STATEMENT |
             +---------------------------+
             1 row in set (9.16 sec)
             +-----------+-----------+-----------+-----------+---------------+------------+-----------+
             | thread_id | exec_time | lock_time | rows_sent | rows_examined | tmp_tables | full_scan |
             +-----------+-----------+-----------+-----------+---------------+------------+-----------+
             |    166646 | 618.43 us | 1.00 ms   |         0 |             1 |          0 |         0 |
             +-----------+-----------+-----------+-----------+---------------+------------+-----------+
             1 row in set (9.16 sec)
             // Truncated for clarity...
             +-----------------------------------------------------------------+
             | sql_text                                                        |
             +-----------------------------------------------------------------+
             | select hibeventhe0_.id as id1382_, hibeventhe0_.createdTime ... |
             +-----------------------------------------------------------------+
             1 row in set (9.17 sec)
             +------------------------------------------+-----------+
             | event_name                               | latency   |
             +------------------------------------------+-----------+
             | stage/sql/init                           | 8.61 us   |
             | stage/sql/Waiting for query cache lock   | 453.23 us |
             | stage/sql/init                           | 331.07 ns |
             | stage/sql/checking query cache for query | 43.04 us  |
             ...
             | stage/sql/freeing items                  | 30.46 us  |
             | stage/sql/cleaning up                    | 662.13 ns |
             +------------------------------------------+-----------+
             18 rows in set (9.23 sec)
             +----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
             | id | select_type | table        | type  | possible_keys | key       | key_len | ref         | rows | Extra |
             +----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
             |  1 | SIMPLE      | hibeventhe0_ | const | fixedTime     | fixedTime | 775     | const,const |    1 | NULL  |
             +----+-------------+--------------+-------+---------------+-----------+---------+-------------+------+-------+
             1 row in set (9.27 sec)
             Query OK, 0 rows affected (9.28 sec)
            