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 ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
