.TH Rename
.PP
Rename attributes
.SH Signature
.PP
.RS
.nf
rename(operand: Relation, renaming: Renaming) \-> Relation
.fi
.RE
.SH Examples
.PP
.RS
.nf
rename(suppliers, :sid => :supplier_id, :city => :lives_in)
.fi
.RE
.SH Description
.PP
Computes the same relation as \fB\fCoperand\fR expect that some attributes have
been renamed.
.SH Implementation notes
.PP
As of current version, renamings can only be expressed through a Hash
mapping input to output attribute names.
.PP
Other ways of specifying renamining will be added in future versions, such
as prefixing, postfixing, renaming through a Proc, etc. Any patch towards
these improvements is welcome.