NAME

SQL::Statement::Term - base class for all terms

SYNOPSIS

  # create a term with an SQL::Statement object as owner
  my $term = SQL::Statement::Term->new( $owner );
  # access the value of that term
  $term->value( $eval );

DESCRIPTION

SQL::Statement::Term is an abstract base class providing the interface for all terms.

INHERITANCE

  SQL::Statement::Term

METHODS

NAME

SQL::Statement::ConstantTerm - term for constant values

SYNOPSIS

  # create a term with an SQL::Statement object as owner
  my $term = SQL::Statement::ConstantTerm->new( $owner, 'foo' );
  # access the value of that term - returns 'foo'
  $term->value( $eval );

DESCRIPTION

SQL::Statement::ConstantTerm implements a term which will always return the same constant value.

INHERITANCE

  SQL::Statement::ConstantTerm
  ISA SQL::Statement::Term

METHODS

NAME

SQL::Statement::ColumnValue - term for column values

SYNOPSIS

  # create a term with an SQL::Statement object as owner
  my $term = SQL::Statement::ColumnValue->new( $owner, 'id' );
  # access the value of that term - returns the value of the column 'id'
  # of the currently active row in $eval
  $term->value( $eval );

DESCRIPTION

SQL::Statement::ColumnValue implements a term which will return the specified column of the active row.

INHERITANCE

  SQL::Statement::ColumnValue
  ISA SQL::Statement::Term

METHODS

AUTHOR AND COPYRIGHT

Copyright (c) 2009-2020 by Jens Rehsack: rehsackATcpan.org

All rights reserved.

You may distribute this module under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file.