Paul Ramsey wrote: > > text_starts_with(arg1,arg2) in varlena.c does a full decompression > > of arg1 when it could limit itself to the length of the smaller arg2: > > Nice catch, I didn't find that one as it's not user visible, seems to > be only called in spgist (!!)
It's also exposed in SQL since v11, as starts_with(string,prefix) returns bool and as an operator: text ^@ text I guess it's meant to be more efficient than (string LIKE prefix||'%') or strpos(string,prefix)=1, and it will be even more so if we can avoid some amount of decompression :) Best regards, -- Daniel Vérité PostgreSQL-powered mailer: http://www.manitou-mail.org Twitter: @DanielVerite
