On Tue, Jun 25, 2019 at 6:38 PM Liudmila Mantrova <l.mantr...@postgrespro.ru> wrote: > Thank you for the catch! Please see the modified version of patch 0004 > attached.
I tried to review and revise the part related to filters, but I failed because I don't understand the notions used in the documentation. What is the difference between filter expression and filter condition? I can guess that filter expression contains question mark, parentheses and filter condition inside. But this sentence is in contradiction with my guess: "A filter expression must be enclosed in parentheses and preceded by a question mark". So, filter expression is inside the parentheses. Then what is filter condition? The same? > Each filter expression can provide one or more filters > that are applied to the result of the path evaluation. So additionally to filter condition and filter expression we introduce the notion of just filter. What is it? Could we make it without introduction of new notion? ------ Alexander Korotkov Postgres Professional: http://www.postgrespro.com The Russian Postgres Company
