I've just set up a new PostgreSQL 9.5.2, and it seems that all my transactions are auto committed.
Running the following SQL:
CREATE TABLE test (id NUMERIC PRIMARY KEY);
INSERT INTO test (id) VALUES (1);
ROLLBACK;
results in a warning:
WARNING: there is no transaction in progress
ROLLBACK
on a different transaction, the following query:
SELECT * FROM test;
actually returns the row with 1
(as if the insert was committed).
I tried to set autocommit
off, but it seems that this feature no longer exists (I get the unrecognized configuration parameter
error).
What the hell is going on here?
autocommit in Postgres is controlled by the SQL client, not on the server.
In psql
you can do this using
\set AUTOCOMMIT off
Details are in the manual:
http://www.postgresql.org/docs/9.5/static/app-psql.html#APP-PSQL-VARIABLES
In that case every statement you execute starts a transaction until you run commit
(including select
statements!)
Other SQL clients have other ways of enabling/disabling autocommit.
Alternatively you can use begin
to start a transaction manually.
http://www.postgresql.org/docs/current/static/sql-begin.html
psql (9.5.1)
Type "help" for help.
postgres=> \set AUTCOMMIT on
postgres=> begin;
BEGIN
postgres=> create table test (id integer);
CREATE TABLE
postgres=> insert into test values (1);
INSERT 0 1
postgres=> rollback;
ROLLBACK
postgres=> select * from test;
ERROR: relation "test" does not exist
LINE 1: select * from test;
^
postgres=>
\set AUTCOMMIT 'off';
The off value
should be in single quotes
This should work. \set AUTOCOMMIT
off. See the example below.
account_dept=# \set AUTOCOMMIT off
account_dept=# update account set ACCT_BALANCE= acct_balance + 200 WHERE ACCT_NUM=1;
UPDATE 1
account_dept=# rollback;
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