| Alzabo::Runtime::Column(3pm) | User Contributed Perl Documentation | Alzabo::Runtime::Column(3pm) |
Alzabo::Runtime::Column - Column objects
use Alzabo::Runtime::Column;
This object represents a column. It holds data specific to a column.
"Alzabo::Column"
Note: all relevant documentation from the superclass has been merged into this document.
Returns the table object to which this column belongs.
Returns the column's name as a string.
Returns a boolean value indicating whether or not NULLs are allowed in this column.
A column's attributes are strings describing the column (for example, valid attributes in MySQL are 'UNSIGNED' or 'ZEROFILL'.
This method returns a list of strings of such strings.
This method can be used to test whether or not a column has a particular attribute. By default, the check is case-insensitive.
It takes the following parameters:
It returns a boolean value indicating whether or not the column has this particular attribute.
Returns the column's type as a string.
The meaning of a sequenced column varies from one RDBMS to another. In those with sequences, it means that a sequence is created and that values for this column will be drawn from it for inserts into this table. In databases without sequences, the nearest analog for a sequence is used (in MySQL the column is given the AUTO_INCREMENT attribute, in Sybase the identity attribute).
In general, this only has meaning for the primary key column of a table with a single column primary key. Setting the column as sequenced means its value never has to be provided to when calling "Alzabo::Runtime::Table->insert".
Returns a boolean value indicating whether or not this column is sequenced.
Returns the default value of the column as a string, or undef if there is no default.
Returns true if the default is intended to be provided to the DBMS as-is, without quoting, fore example "NOW()" or "current_timestamp".
Returns the length attribute of the column, or undef if there is none.
Returns the precision attribute of the column, or undef if there is none.
Returns a boolean value indicating whether or not this column is part of its table's primary key.
Returns a boolean value indicating whether the column is a numeric type column.
Returns a boolean value indicating whether the column is a numeric type column.
Returns a boolean value indicating whether the column is a numeric type column.
Returns a boolean value indicating whether the column is a character type column.
This is true only for any columns which are defined to hold text data, regardless of size.
Returns a boolean value indicating whether the column is a date type column.
Returns a boolean value indicating whether the column is a datetime type column.
Returns a boolean value indicating whether the column is a time type column.
Returns a boolean value indicating whether the column is a time interval type column.
Returns a boolean value indicating whether the column is a blob column.
This is true for any columns defined to hold binary data, regardless of size.
This methods returns one of the following strings:
The definition object is very rarely of interest. Use the "type()" method if you are only interested in the column's type.
This methods returns the "Alzabo::Runtime::ColumnDefinition" object which holds this column's type information.
Returns the comment associated with the column object, if any.
Takes the following parameters:
This method returns an object that can be used in calls to the table and schema "select()" methods in order to change the name given to the column if "next_as_hash()" is called on the "Alzabo::DriverStatement" returned by the aforementioned "select()" method.
Dave Rolsky, <autarch@urth.org>
| 2015-05-24 | perl v5.20.2 |