PostgreSQL

44.10. Transaction Management
Prev	Up	Chapter 44. PL/Tcl — Tcl Procedural Language	Home	Next

44.10. Transaction Management #

In a procedure called from the top level or an anonymous code block (DO command) called from the top level it is possible to control transactions. To commit the current transaction, call the commit command. To roll back the current transaction, call the rollback command. (Note that it is not possible to run the SQL commands COMMIT or ROLLBACK via spi_exec or similar. It has to be done using these functions.) After a transaction is ended, a new transaction is automatically started, so there is no separate command for that.

Here is an example:

CREATE PROCEDURE transaction_test1()
LANGUAGE pltcl
AS $$
for {set i 0} {$i < 10} {incr i} {
    spi_exec "INSERT INTO test1 (a) VALUES ($i)"
    if {$i % 2 == 0} {
        commit
    } else {
        rollback
    }
}
$$;

CALL transaction_test1();

Transactions cannot be ended when an explicit subtransaction is active.

Prev	Up	Next
44.9. Explicit Subtransactions in PL/Tcl	Home	44.11. PL/Tcl Configuration

44.9. Explicit Subtransactions in PL/Tcl

Home

44.11. PL/Tcl Configuration

Submit correction

If you see anything in the documentation that is not correct, does not match your experience with the particular feature or requires further clarification, please use this form to report a documentation issue.