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Previously, committing or aborting inside a cursor loop was prohibited because that would close and remove the cursor. To allow that, automatically convert such cursors to holdable cursors so they survive commits or rollbacks. Portals now have a new state "auto-held", which means they have been converted automatically from pinned. An auto-held portal is kept on transaction commit or rollback, but is still removed when returning to the main loop on error. This supports all languages that have cursor loop constructs: PL/pgSQL, PL/Python, PL/Perl. Reviewed-by: Ildus Kurbangaliev <i.kurbangaliev@postgrespro.ru>
Guide to alternative expected files: plpython_error_0.out Python 2.4 and older plpython_error_5.out Python 3.5 and newer plpython_unicode.out server encoding != SQL_ASCII plpython_unicode_3.out server encoding == SQL_ASCII plpython_subtransaction_0.out Python 2.4 and older (without with statement) plpython_subtransaction_5.out Python 2.5 (without with statement) plpython_types_3.out Python 3.x