MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0
These views display normalized statements that have done full table scans. By default, rows are sorted by descending percentage of time a full scan was done and descending total latency.
The
statements_with_full_table_scans
and
x$statements_with_full_table_scans
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 statement events for the statement.
no_index_used_count
The total number of times no index was used to scan the table.
no_good_index_used_count
The total number of times no good index was used to scan the table.
no_index_used_pct
The percentage of the time no index was used to scan the table.
rows_sent
The total number of rows returned from the table.
rows_examined
The total number of rows read from the storage engine for the table.
rows_sent_avg
The average number of rows returned from the table.
rows_examined_avg
The average number of rows read from the storage engine for the table.
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.