Re: Conditional column filtering with pglogical replication

Em sex., 23 de out. de 2020 às 10:35, PALAYRET Jacques <
jacques(dot)palayret(at)meteo(dot)fr> escreveu:
>
> With PgLogical extension, I have tested the possibility of column
filtering (columns) and row filtering (row_filter).
> But is there a way to do a conditional column filtering ?
> I mean a way to filter a column based on a predicate, with pglogical (so
the filtered values won’t arrive on subscribers).
> For example, with a replicated table t(a integer as Primary Key, b
numeric, c integer, d text), I would like to filter the column b when c
between 10 and 20.
>

Hello,

According to the documentation [1] the row_filter is a normal PostgreSQL
expression with the same limitations of CHECK constraints, so you can do
something like: row_filter := 'c between 10 and 20 and b = ?'

Regards,

[1] https://github.com/2ndQuadrant/pglogical#row-filtering

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