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select * from performance_schema.events_statements_summary_by_user_by_event_name
where event_name like 'statement/%' limit 1;
select * from performance_schema.events_statements_summary_by_user_by_event_name
where event_name='FOO';
insert into performance_schema.events_statements_summary_by_user_by_event_name
set event_name='FOO', user='BAR',
count_star=1, sum_timer_wait=2, min_timer_wait=3,
avg_timer_wait=4, max_timer_wait=5;
ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
update performance_schema.events_statements_summary_by_user_by_event_name
set count_star=12;
ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
update performance_schema.events_statements_summary_by_user_by_event_name
set count_star=12 where event_name like "FOO";
ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
delete from performance_schema.events_statements_summary_by_user_by_event_name
where count_star=1;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
delete from performance_schema.events_statements_summary_by_user_by_event_name;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
LOCK TABLES performance_schema.events_statements_summary_by_user_by_event_name READ;
ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
UNLOCK TABLES;
LOCK TABLES performance_schema.events_statements_summary_by_user_by_event_name WRITE;
ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'events_statements_summary_by_user_by_event_name'
UNLOCK TABLES;
#
# MDEV-25325 column_comment for performance_schema tables
#
select column_name, column_comment
from information_schema.columns
where table_schema='performance_schema' and table_name='events_statements_summary_by_user_by_event_name';
column_name column_comment
USER User. Used together with EVENT_NAME for grouping events.
EVENT_NAME Event name. Used together with USER for grouping events.
COUNT_STAR Number of summarized events
SUM_TIMER_WAIT Total wait time of the summarized events that are timed.
MIN_TIMER_WAIT Minimum wait time of the summarized events that are timed.
AVG_TIMER_WAIT Average wait time of the summarized events that are timed.
MAX_TIMER_WAIT Maximum wait time of the summarized events that are timed.
SUM_LOCK_TIME Sum of the LOCK_TIME column in the events_statements_current table.
SUM_ERRORS Sum of the ERRORS column in the events_statements_current table.
SUM_WARNINGS Sum of the WARNINGS column in the events_statements_current table.
SUM_ROWS_AFFECTED Sum of the ROWS_AFFECTED column in the events_statements_current table.
SUM_ROWS_SENT Sum of the ROWS_SENT column in the events_statements_current table.
SUM_ROWS_EXAMINED Sum of the ROWS_EXAMINED column in the events_statements_current table.
SUM_CREATED_TMP_DISK_TABLES Sum of the CREATED_TMP_DISK_TABLES column in the events_statements_current table.
SUM_CREATED_TMP_TABLES Sum of the CREATED_TMP_TABLES column in the events_statements_current table.
SUM_SELECT_FULL_JOIN Sum of the SELECT_FULL_JOIN column in the events_statements_current table.
SUM_SELECT_FULL_RANGE_JOIN Sum of the SELECT_FULL_RANGE_JOIN column in the events_statements_current table.
SUM_SELECT_RANGE Sum of the SELECT_RANGE column in the events_statements_current table.
SUM_SELECT_RANGE_CHECK Sum of the SELECT_RANGE_CHECK column in the events_statements_current table.
SUM_SELECT_SCAN Sum of the SELECT_SCAN column in the events_statements_current table.
SUM_SORT_MERGE_PASSES Sum of the SORT_MERGE_PASSES column in the events_statements_current table.
SUM_SORT_RANGE Sum of the SORT_RANGE column in the events_statements_current table.
SUM_SORT_ROWS Sum of the SORT_ROWS column in the events_statements_current table.
SUM_SORT_SCAN Sum of the SORT_SCAN column in the events_statements_current table.
SUM_NO_INDEX_USED Sum of the NO_INDEX_USED column in the events_statements_current table.
SUM_NO_GOOD_INDEX_USED Sum of the NO_GOOD_INDEX_USED column in the events_statements_current table.
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