2010/5/28 alvherre <alvhe...@commandprompt.com>: > Excerpts from Peter Eisentraut's message of vie may 28 12:27:52 -0400 2010: > >> Option 2, invent some new mechanism that accompanies a datum or a type >> whereever it goes. Kind of like typmod, but not really. Then the >> collation information would presumably be made available to functions >> through the fmgr interface. The binary representation of data values >> stays the same. > > Is the collation a property of the datum, or one of the comparison? > If the latter, should it be really be made a sidecar of a datum, or > would it make more sense to attach it to the operation being performed?
> > I wonder if instead of trying to pass it down multiple layers till > bttextcmp and further down, it would make more sense to set a global > variable somewhere in the high levels, and only have it checked in > varstr_cmp. > Maybe collation is property of some operation: func call, sort, ... I prefer to put collation info to FunctionCallInfo structure. Usually you cannot change collation per row - collation is attached to expression. Regards Pavel > -- > Álvaro Herrera <alvhe...@commandprompt.com> > The PostgreSQL Company - Command Prompt, Inc. > PostgreSQL Replication, Consulting, Custom Development, 24x7 support > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers > -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers