v.21.3New Feature
Added implicit_key option for executable dictionary source to optimize key printing
Addedimplicit_keyoption forexecutabledictionary source. It allows to avoid printing key for every record if records comes in the same order as the input keys. Implements #14527. #19677 (Maksim Kita).
Why it matters
This feature improves performance and reduces redundancy by avoiding the need to explicitly include the key in every record when loading data via theexecutable dictionary source, assuming the records are aligned with the input keys order.How to use it
To use this feature, set theimplicit_key option to true in the configuration of the executable dictionary source. This signals ClickHouse that the keys are implicit and records will be processed in the same order as the keys.