NAME
Genezzo::Row::RSExpr - Row Source Expression Evaluation
SYNOPSIS
use Genezzo::Row::RSExpr;
# see Genezzo::GenDBI usage
DESCRIPTION
RSExpr is a hierarchical pushhash (see Genezzo::PushHash::hph) class which evaluates and projects a set of expressions for each input row. The input rows are produced by RSTab (see Genezzo::Row::RSTab).
ARGUMENTS
- row source (Required) - an input row source
- dict (Required) - dictionary object from Genezzo::Dict
- dbh (Required) - database handle object from Genezzo::GenDBI
- select list (Optional) - a list of output expressions that is applied as a transform on the input row
FUNCTIONS
RSExpr support all standard hph hierarchical pushhash operations.
EXPORT
LIMITATIONS
various
TODO
- SQLPrepare/SQLFetch: requires ALIAS argument, which doesn't make sense for rowsources like RSDual (see XEval). "Alias" is only necessary to disambiguate named columns.
AUTHOR
Jeffrey I. Cohen, jcohen@genezzo.com
SEE ALSO
Copyright (c) 2005, 2006 Jeffrey I Cohen. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USAAddress bug reports and comments to: jcohen@genezzo.com
For more information, please visit the Genezzo homepage at http://www.genezzo.com