v.19.5New Features

Implement the Predefined Expression Filter per Row for Tables

Implement the predefined expression filter per row for tables. #4792 (Ivan)
Introduces predefined expression filters applied per row for tables in ClickHouse.

Why it matters

This feature allows applying predefined expression filters at a row level on tables, enabling more efficient data filtering directly within the query execution process. It solves the problem of having to repeatedly write complex filter expressions by allowing them to be predefined and reused, improving both usability and query performance.

How to use it

Users can define and apply predefined expression filters to tables to filter data on a per-row basis. While specific syntax details are contained in the linked pull request, generally users would create these filters and then refer to them in their queries to enforce row-level filtering.