The following bug has been logged on the website:
Bug reference: 18139
Logged by: Paul Gazagne
Email address: pyrotarlu74@gmail.com
PostgreSQL version: 14.9
Operating system: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
Description:
How to reproduce the error :
Setup table and dataset :
CREATE TABLE test (
id int4 not null,
value numeric(20, 6) NULL,
value_t text NULL
);
INSERT INTO test (id)
VALUES (1);
INSERT INTO test (id,value,value_t)
VALUES (2,2,'it is 2');
INSERT INTO test (id)
VALUES (3);
INSERT INTO test (id,value,value_t)
VALUES (4,4,'it is 4');
INSERT INTO test (id)
VALUES (5);
If I use the function last/first on this dataset, if the first rows parsed
by the function contain null values, it cause FATAL error on database.
Examples :
These queries work fine :
select
last(value_t,value) as thatsok
from test t
where id between 2 and 4;
select
last(value_t,value) as thatsok
from test t
where id between 2 and 5;
select
first(value_t,value) as thatsok
from test t
where id between 2 and 4;
select
first(value_t,value) as thatsok
from test t
where id between 2 and 5;
These ones cause FATAL error :
select
last(value_t,value) as fatal_error
from test t
where id between 1 and 5;
select
first(value_t,value) as fatal_error
from test t
where id between 1 and 5;