Hello:
Below is a sample case that exhibits a behavior that I can't explain:
-- create the table
create table ts (t timestamp without time zone);
-- populate
insert into ts(t) values ('2022-07-16 00:22:06.974000');
insert into ts(t) values ('2022-07-16 00:22:06.974000');
insert into ts(t) values ('2022-07-16 00:22:06.974000');
-- This one return expected results
select * from ts where t::date between '2022-07-16'::Date - make_interval(days => 30) and '2022-07-16'::Date;
t
-------------------------
2022-07-16 00:22:06.974
2022-07-16 00:22:06.974
2022-07-16 00:22:06.974
(3 rows)
-- This one doesn't return anything (unexpected)
select * from ts where t between '2022-07-16'::Date - make_interval(days => 30) and '2022-07-16'::Date;
t
---
(0 rows)
-- version
select version();
version
---------------------------------------------------------------------------------------------------------
PostgreSQL 14.4 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-15), 64-bit
(1 row)
Regards,
Ludwig Lim
