Ok, I found what's append :
1/ current value of the sequence data are following :
scheduling=# select * from seq_id_fch;sequence_name | last_value | increment_by | max_value| min_value | cache_value |
log_cnt| is_cycled |
is_called
---------------+------------+--------------+------------+-----------+-------------+---------+-----------+-----------seq_id_fch
| 1 | 1 |
2147483647 | 1 | 1 | 0 | f | t
(1 row)
2/ Line 6083, we have a request to get these
informations :
SELECT sequence_name, last_value, increment_by,
CASE WHEN increment_by > 0 AND max_value =
9223372036854775807 THEN NULL WHEN increment_by < 0 AND max_value = -1 THEN
NULL ELSE max_value
END AS max_value,
CASE WHEN increment_by > 0 AND min_value = 1 THEN NULL WHEN increment_by < 0 AND min_value =
-9223372036854775807 THEN NULL ELSE min_value
END AS min_value,
cache_value, is_cycled, is_called from seq_id_fch;sequence_name | last_value | increment_by | max_value| min_value |
cache_value| is_cycled | is_called
---------------+------------+--------------+------------+-----------+-------------+-----------+-----------seq_id_fch
| 1 | 1 |
2147483647 | | 1 | f | t
As you can see, "min_value" is NULL because
CASE WHEN increment_by (=1) > 0 AND min_value (=1) = 1
THEN NULL
3/ Line 6156, we're creating the request appendPQExpBuffer(query, "CREATE SEQUENCE %s\n START WITH
%s\n
INCREMENT BY %s\n", fmtId(tbinfo->relname), (called ? minv : last), incby);
so, with values, it's
seq:'seq_id_fch', [called : 1] ? [minv : ''
(00000000)], [last : '1' (400303eb)]
seq:'x', [called : 0] ? [minv : '' (00000000)], [last
: '1' (400303e2)]
and we create a request w/ a NULL pointer w/
"seq_id_fch" whereas it's ok for "x".
I duno what is the goal of "is_called" field, it's the
only difference b/w "x" and "seq_id_fch", and the only
thing touching "seq_id_fch" is some granting.
Anyway, I think the fault is on request line 6083
because we may create erroneous lines for nothing. Why
can't we take directly informations from sequence data
?
Bye
Laurent
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