Determines whether or not to collect specific timing statistics and display them in the query plan.
DBA permissions are not required to set this option. Can be set temporary for an individual connection or for the PUBLIC group. Takes effect immediately.
This option controls the collection of timing statistics on subqueries and some other repetitive functions in the query engine. This parameter should normally be OFF (the default) because for very short correlated subqueries, timing every subquery execution can slow down a query.
Query timing is represented in the query plan detail as a series of timestamps. These timestamps correspond to query operator phases (Conditions, Prepare, Fetch, Complete). HTML and Interactive SQL query plans display query timing graphically as a timeline.