I hope you can help with this. I have a BEFORE trigger that run every time an event insert o update occurs on a table called stock. It is working fine inserting the correct data on the table if the conditions are met, and inserting nothing if not. The problem is when it rejects the insert statement, the sequence number stock_id gets incremented even though nothing is inserted on the table. What can i do to stop stock_id from incrementing??.
Mitchell
p.d. This is the code.
create function serie_trigger() returns trigger AS $$ declare pro_record record; begin select * into pro_record from producto where producto_id = new.producto_id; if (pro_record.seriado = true) then if (new.serie IS NOT NULL) then if (new.cantidad = 1) then return new; -- new se usa como fuente para insert else raise notice 'ERROR: Candidad debe ser 1, las series se pueden insertar solo una a la vez'; return NULL; end if; else raise notice 'ERROR: Debe ingresar una serie, el producto es seriado'; return NULL; end if; else if (new.serie IS NULL) then return new; -- new se usa como fuente para insert else raise notice 'ERROR: El producto es no seriado, no corresponde ingresar serie.'; return NULL; end if; end if; end; $$ language plpgsql;