Simon Riggs wrote:
> On PostgreSQL, CHAR(12) is a bpchar datatype with all instantiations of
> that datatype having a 4 byte varlena header. In this example, all of
> those instantiations having the varlena header set to 12, so essentially
> wasting the 4 byte header.
We need the length word because the actual size in bytes is variable,
due to multibyte encoding considerations.
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
