---
name: "DBIx::DBSchema::ColGroup"
section: "3pm"
platform: "linux"
package: "libdbix-dbschema-perl"
version: "0.40-2"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/DBIx::DBSchema::ColGroup"
---

# DBIx::DBSchema::ColGroup(3pm)

Column group objects

## NAME

DBIx::DBSchema::ColGroup - Column group objects

## SYNOPSIS

```
  use DBIx::DBSchema::ColGroup;
  $colgroup = new DBIx::DBSchema::ColGroup ( $lol_ref );
  $colgroup = new DBIx::DBSchema::ColGroup ( \@lol );
  $colgroup = new DBIx::DBSchema::ColGroup (
    [
      [ 'single_column' ],
      [ 'multiple_columns', 'another_column', ],
    ]
  );
  $lol_ref = $colgroup->lol_ref;
  @sql_lists = $colgroup->sql_list;
  @singles = $colgroup->singles;
```

## DESCRIPTION

This class is deprecated and included for backwards-compatibility only. See DBIx::DBSchema::Index for the current class used to store unique and non-unique indices.

DBIx::DBSchema::ColGroup objects represent sets of sets of columns.  (IOW a "list of lists" - see perllol.)

## METHODS

- new \[ LOL\_REF \]

  Creates a new DBIx::DBSchema::ColGroup object.  Pass a reference to a list of lists of column names.

- lol\_ref

  Returns a reference to a list of lists of column names.

- sql\_list

  Returns a flat list of comma-separated values, for SQL statements.

  For example:

  ```
    @lol = (
             [ 'single_column' ],
             [ 'multiple_columns', 'another_column', ],
           );
    $colgroup = new DBIx::DBSchema::ColGroup ( \@lol );
    print join("\n", $colgroup->sql_list), "\n";
  ```

  Will print:

  ```
    single_column
    multiple_columns, another_column
  ```

- singles

  Returns a flat list of all single item lists.

## AUTHOR

Ivan Kohler \<ivan-dbix-dbschema@420.am\>

## COPYRIGHT

Copyright (c) 2000 Ivan Kohler Copyright (c) 2000 Mail Abuse Prevention System LLC All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

## BUGS

## SEE ALSO

DBIx::DBSchema::Index, DBIx::DBSchema::Table, DBIx::DBSchema::ColGroup::Unique, DBIx::DBSchema::ColGroup::Index, DBIx::DBSchema, perllol, perldsc, DBI