I'm building an app where I have several entities that are identified
using a UUID (i.e. a 128 bit quantity). My current implementation uses a
composite primary key consisting of two int8 values. It's a bit
cumbersome and I would much rather have a distinct type. An earlier
implementation using Oracle mapped the UUID to a RAW(16) but PostgreSQL
doesn't have that and the BYTEA adds extra overhead.
What would be the best (as in most efficient) mapping for a 128 bit
primary key?
Regards,
Thomas Hallgren
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
