Archive for January, 2016

pre-9.5 PostgreSQL upsert

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With the recent PostgreSQL 9.5 release, one of the exciting new features is “upsert” support, which is where you want to either update an existing row or insert a new one if it doesn’t already exist. If you’re still on an old version of PostgreSQL, however, you here’s how I’ve been getting that accomplished. This example uses the Perl DBI mechanism, but I think it’s readable enough that it’d be easy to convert to anything else with parametrized query preparation.
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