On 10/30/18 7:03 AM, p.piero...@mmbb.it wrote:
Hi everyone,
I have problems with stored procedures introduced in version 11.
I do not understand how to create a nested transaction, in this
semplified example:
*create**or**replace**procedure*tst_prc(*inout*p_cod *text*)
*language*plpgsql *as**$procedure$*
*begin*
p_cod := 'a';
*begin*
*update*aziende *set*mail = 'a...@asd.asd'*where*id = 11; --1st update
*begin*
*update*aziende *set*telefono = '0123456789'*where*id = 11; --2nd update
*commit*;
*raise**notice*'Inner';
*end*;
*update*aziende *set*telefono = '089'*where*id = 11; --3rd update
--commit;
*rollback*;
*raise**notice*'Outer';
*end*;
p_cod := 'b';
*end*;
*$procedure$*
The third update goes, rightly, in rollback; the problem is that the
first 2 are committed.
I thought that the “BEGIN/END” block was used to create new transactions
and that each of them could be managed individually.
https://www.postgresql.org/docs/10/static/plpgsql-structure.html
"It is important not to confuse the use of BEGIN/END for grouping
statements in PL/pgSQL with the similarly-named SQL commands for
transaction control. PL/pgSQL's BEGIN/END are only for grouping; they do
not start or end a transaction. See Section 43.8 for information on
managing transactions in PL/pgSQL. Also, a block containing an EXCEPTION
clause effectively forms a subtransaction that can be rolled back
without affecting the outer transaction. For more about that see "
What am I doing wrong?
Best regards.
**
*Paolo Pierotti *
**
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--
Adrian Klaver
adrian.kla...@aklaver.com
