[HACKERS] determining a type oid from the name

[Andrew Dunstan]

Say I'm writing an extension X, and I want to process data values from 
another extension that creates type Y (e.g. an hstore), what's the best 
way to determine the Oid of type Y in my module X code? SPI code that 
runs "select 'something'::Y" and then examines the oid in SPI_tuptable? 
Or do we have a utility function I have missed that, given a type name 
and the current search path will give me back the type Oid?

cheers
andrew

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