Internal use only. Describes a reference to a table column.
Internal use only. The SQL::Query::ColumnReference object describes a reference to a table column. It occurs wherever a column is referenced in a select list or value or logical expression. Note that it does not include the alias. The alias is a variable of the SQL::Query::SelectItem object.
Read Write. The name of the column.
Read Write. The name of the table (or its alias) this column is from.
Read Write. "ColumnReference".