NAME

Genezzo::Plan::TypeCheck - Perform checks on relational algebra representation

SYNOPSIS

use Genezzo::Plan::TypeCheck;

DESCRIPTION

ARGUMENTS

FUNCTIONS

Convert

EXPORT

LIMITATIONS

TODO

sql_where: function name processing -- drive from user_function, use type-checking functions.

update pod

need to handle FROM clause subqueries -- some tricky column type issues.

explode STARs with column names - need consistent join table position

check bool_op - AND purity if no OR's.

check relational operator (comp_op, relop)

handle ddl/dml (create, insert, delete etc with embedded queries) by checking for query_block info -- look for hash with 'query_block' before attempting table/col resolution. Need special type checking for these functions.

refactor to common TreeWalker

AUTHOR

Jeffrey I. Cohen, jcohen@genezzo.com

SEE ALSO

perl(1).

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  USA

Address bug reports and comments to: jcohen@genezzo.com

For more information, please visit the Genezzo homepage at http://www.genezzo.com