Am 24.12.2013 08:11, schrieb Laurence Rowe:
Postgres' INTERVAL supports deltas of quantities other than days, +1 month may mean 28/29/30/31 days depending on the month. From http://stackoverflow.com/questions/546321/how-do-i-calculate-the-date-six-months-from-the-current-date-using-the-datetime, dateutil has support for a richer relativedelta type andthis can configure it on the psycopg2 level: https://pypi.python.org/pypi/psycopg2-dateutils
Exactly, that's it. The stackoverflow discussion was very instructive, thank you! I'll try out psycopg2-dateutils.
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