Function

Summary

Returns the type of an attribute.

Package

sql

Signature

attribute-type attribute table &key database owner => datatype

Arguments

table

A table.

attribute

An attribute from table.

database

A database.

owner

nil, :all or a string.

Values

datatype

A keyword or list denoting a vendor-specific type.

Description

The function attribute-type returns the type of the attribute specified by attribute in the table given by table. The database, in which table is found, has a default value of *default-database*.

If owner is nil, only user-owned attributes are considered. This is the default.

If owner is :all, all attributes are considered.

If owner is a string, this denotes a username and only attributes owned by owner are considered.

datatype demotes a vendor-specific type. Examples in a MS Access database are :integer, :longchar and :datetime. When datatype is a list, the second element is the length of the type, for example (:varchar 255).

Example

To print the type of every attribute in the database, do

(loop for tab in 

      (sql:list-tables)

      do 

      (loop for att in 

            (sql:list-attributes tab)

            do 

            (format t "~&Table ~S Attribute ~S Type ~S" 

                    tab att 

                    (sql:attribute-type att tab))))

See also

*default-database*
list-attribute-types
list-attributes