On 12/01/2018 06:22 AM, PegoraroF10 wrote:
I´m trying to use transition tables for auditing purposes.
create trigger MyTableAudit_UPD after update on MyTable referencing old
table as Transition_old new table as Transition_new for each statement
execute procedure AuditTable();
create or replace function AuditTable() returns trigger language plpgsql as
$$
if (TG_OP = 'UPDATE') then
insert into audittable(table_name, oid, audit_action, user_id,
table_schema, values_old, values_new)
select TG_TABLE_NAME, Transition_new.oid, TG_OP, CURRENT_USER,
TG_TABLE_SCHEMA, row_to_json(Transition_old.*)::jsonb,
row_to_json(Transition_new.*)::jsonb from Transition_new inner join
Transition_old on Transition_new.OID = Transition_old.OID;
elsif (TG_OP = 'DELETE') then
insert into audittable(table_name, oid, audit_action, user_id,
table_schema, values_old)
select TG_TABLE_NAME, Transition_old.oid, TG_OP, CURRENT_USER,
TG_TABLE_SCHEMA, row_to_json(Transition_old.*)::jsonb from Transition_old;
end if;
[42703] ERROR: column transition_new.oid does not exist Where: função
PL/pgSQL audittable() linha 14 em comando SQL
I would like to user OID value because we change our primary keys,
sometimes, OID doesn´t.
So, there is a way to get OID on transition tables ?
Did you create MyTable WITH OIDS (or set default_with_oids on in
postgresql.conf)? https://www.postgresql.org/docs/9.6/datatype-oid.html
Also,
https://www.postgresql.org/docs/9.6/runtime-config-compatible.html#GUC-DEFAULT-WITH-OIDS
"The use of OIDs in user tables is considered deprecated, so most
installations should leave this variable disabled. Applications that require
OIDs for a particular table should specify WITH OIDS when creating the table."
More importantly, https://wiki.postgresql.org/wiki/FAQ#What_is_an_OID.3F
"OIDs are sequentially assigned 4-byte integers. Initially they are unique
across the entire installation. However, the OID counter wraps around at 4
billion, and after that OIDs may be duplicated.
It is possible to prevent duplication of OIDs within a single table by
creating a unique index on the OID column (but note that the WITH OIDS
clause doesn't by itself create such an index). The system checks the index
to see if a newly generated OID is already present, and if so generates a
new OID and repeats. This works well so long as no OID-containing table has
more than a small fraction of 4 billion rows."
--
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