Martijn van Oosterhout <kleptog@svana.org> writes: > The fundamental property of a Datum is that you can pass it by value to > a C function. This generally means it has to fit in a register. On the > whole, the CPU register size is the same as the pointer size, so > 2*sizeof(pointer) is unlikely to fit...
Not having it fit in a register might impact performance but it certainly isn't a requirement. You can pass whole structs by value in modern C. (And by modern here I don't mean C99, this has been supported since before ANSI and is required by *C89*). -- Gregory Stark EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- 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
