DROP INDEX CONCURRENTLY IF EXISTS “messages_stream_name_position_uniq_idx”; CREATE UNIQUE INDEX CONCURRENTLY “messages_stream_name_position_uniq_idx” ON “public”.“messages” USING btree(stream_name COLLATE “default” “pg_catalog”.“text_ops” ASC NULLS LAST, “position” “pg_catalog”.“int8_ops” ASC NULLS LAST);