On Mon, Nov 29, 2021, at 7:11 AM, Amit Kapila wrote: > I don't think it is a good idea to combine the row-filter from the > publication that publishes just 'insert' with the row-filter that > publishes 'updates'. We shouldn't apply the 'insert' filter for > 'update' and similarly for publication operations. We can combine the > filters when the published operations are the same. So, this means > that we might need to cache multiple row-filters but I think that is > better than having another restriction that publish operation 'insert' > should also honor RI columns restriction. That's exactly what I meant to say but apparently I didn't explain in details. If a subscriber has multiple publications and a table is part of these publications with different row filters, it should check the publication action *before* including it in the row filter list. It means that an UPDATE operation cannot apply a row filter that is part of a publication that has only INSERT as an action. Having said that we cannot always combine multiple row filter expressions into one. Instead, it should cache individual row filter expression and apply the OR during the row filter execution (as I did in the initial patches before this caching stuff). The other idea is to have multiple caches for each action. The main disadvantage of this approach is to create 4x entries.
I'm experimenting the first approach that stores multiple row filters and its publication action right now. Unfortunately we cannot use the relentry->pubactions because it aggregates this information if you have multiple entries. It seems a separate array should store this information that will be used later while evaluating the row filter -- around pgoutput_row_filter_exec_expr() call. -- Euler Taveira EDB https://www.enterprisedb.com/
