Problem with SET CONSTRAINTS some_constraint_fkey DEFERRED - Mailing list pgsql-general

Why I get: update or delete on table "people" violates foreign key
constraint "transactions_person_id_fkey" on table "transactions"

But before that query I run: SET CONSTRAINTS
transactions_person_id_fkey DEFERRED; before delete from people table

Log:

2009-12-09 20:01:51 EET LOG:  statement: BEGIN; SET TRANSACTION
ISOLATION LEVEL READ COMMITTED
2009-12-09 20:01:51 EET LOG:  duration: 0.176 ms
2009-12-09 20:01:51 EET LOG:  statement: select version()
2009-12-09 20:01:51 EET LOG:  duration: 0.552 ms
2009-12-09 20:01:51 EET LOG:  statement: select current_schema()
2009-12-09 20:01:51 EET LOG:  duration: 0.391 ms
2009-12-09 20:01:51 EET LOG:  statement: SELECT CAST('test unicode
returns' AS VARCHAR(60)) AS anon_1
2009-12-09 20:01:51 EET LOG:  duration: 0.506 ms
2009-12-09 20:01:51 EET LOG:  statement: SET search_path TO system,ternopil
2009-12-09 20:01:51 EET LOG:  duration: 0.223 ms
2009-12-09 20:01:51 EET LOG:  statement: SELECT imports.id AS
imports_id, imports.name AS imports_name, imports."table" AS
imports_table, imports.priority AS imports_priority, imports.source AS
imports_source, imports.encoding AS imports_encoding, imports.fields
AS imports_fields, imports.filter AS imports_filter, imports.disabled
AS imports_disabled
        FROM imports
        WHERE imports.source IN (E'people.csv') ORDER BY imports.priority
2009-12-09 20:01:51 EET LOG:  duration: 1.993 ms
2009-12-09 20:01:51 EET LOG:  statement: SELECT pg_constraint.conname
FROM pg_catalog.pg_constraint, pg_catalog.pg_class,
pg_catalog.pg_namespace WHERE pg_constraint.confrelid = pg_class.oid
AND pg_constraint.contype = E'f' AND pg_class.relname = E'people' AND
pg_namespace.oid = pg_class.relnamespace AND pg_namespace.nspname =
E'ternopil' AND pg_constraint.conrelid != pg_class.oid
2009-12-09 20:01:51 EET LOG:  duration: 3.722 ms

>>>> IT'S HERE >>>>

2009-12-09 20:01:51 EET LOG:  statement: SET CONSTRAINTS
meter_readings_person_id_fkey,transactions_person_id_fkey DEFERRED
2009-12-09 20:01:51 EET LOG:  duration: 0.490 ms
2009-12-09 20:01:51 EET LOG:  statement: DELETE FROM people
2009-12-09 20:01:51 EET LOG:  duration: 743.187 ms
2009-12-09 20:01:51 EET LOG:  statement: COPY
people(id,street_id,building,corpus,appartment,block,last_name,hd,residents,space,rooms,privilege,comment)
FROM stdin WITH DELIMITER AS E'      '
2009-12-09 20:02:12 EET LOG:  duration: 20142.596 ms
2009-12-09 20:02:12 EET LOG:  statement: COMMIT
2009-12-09 20:02:12 EET ERROR:  update or delete on table "people"
violates foreign key constraint "transactions_person_id_fkey" on table
"transactions"
2009-12-09 20:02:12 EET DETAIL:  Key (id)=(306216) is still referenced
from table "transactions".
2009-12-09 20:02:12 EET STATEMENT:  COMMIT


eps=# \d transactions
                                      Table "ternopil.transactions"
       Column       |          Type          |
Modifiers
--------------------+------------------------+-----------------------------------------------------------
 id                 | integer                | not null default
nextval('transactions_id_seq'::regclass)
...
 person_id          | integer                | not null
 ...

Foreign-key constraints:
...
    "transactions_person_id_fkey" FOREIGN KEY (person_id) REFERENCES
people(id) DEFERRABLE
...