Dominique Devienne <ddevienne@xxxxxxxxx> writes: > On Mon, Jan 30, 2023 at 5:11 PM veem v <veema0000@xxxxxxxxx> wrote: >> CREATE TABLE test1_UUID ( id bigint,source_id varchar(36) PRIMARY KEY, Name varchar(20) ); > Maybe if you used a "native" 16-byte uuid, instead of its textual > serialization with dashes (36 bytes + length overhead), the gap would > narrow. Yeah, especially if your database is not using C locale. The strcoll or ICU-based comparisons done on string types can be enormously more expensive than the memcmp() used for binary types like native uuid. regards, tom lane
