MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
These views list normalized statements that have performed sorts. By default, rows are sorted by descending total latency.
The statements_with_sorting
and
x$statements_with_sorting
views
have these columns:
query
The normalized statement string.
db
The default database for the statement, or
NULL
if there is none.
exec_count
The total number of times the statement has executed.
total_latency
The total wait time of timed occurrences of the statement.
sort_merge_passes
The total number of sort merge passes by occurrences of the statement.
avg_sort_merges
The average number of sort merge passes per occurrence of the statement.
sorts_using_scans
The total number of sorts using table scans by occurrences of the statement.
sort_using_range
The total number of sorts using range accesses by occurrences of the statement.
rows_sorted
The total number of rows sorted by occurrences of the statement.
avg_rows_sorted
The average number of rows sorted per occurrence of the statement.
first_seen
The time at which the statement was first seen.
last_seen
The time at which the statement was most recently seen.
digest
The statement digest.