Difference between revisions of "GETDATAMAPPING Column Constraint"
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Yvonne.milne (Talk | contribs) (Created page with "==Purpose== Column constraint to specify the display data mapping for a column ==Syntax== SET GETDATAMAPPING <expC> ==See Also== ALTER TABLE, SQL Constraints|CONSTRAIN...") |
Barrymavin (Talk | contribs) (→Example) |
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<code lang="recital"> | <code lang="recital"> | ||
open database southwind | open database southwind | ||
| − | alter table "products" modify constraint supplierid set choices 'select companyname from suppliers order by companyname' | + | alter table "products" modify constraint supplierid; |
| − | alter table "products" modify constraint supplierid set getdatamapping 'keylookup("suppliers", "supplierid",{}, companyname)' | + | set choices 'select companyname from suppliers order by companyname' |
| − | alter table "products" modify constraint supplierid set setdatamapping 'keylookup("suppliers", "companyname","{}", supplierid)' | + | alter table "products" modify constraint supplierid: |
| + | set getdatamapping 'keylookup("suppliers", "supplierid",{}, companyname)' | ||
| + | alter table "products" modify constraint supplierid; | ||
| + | set setdatamapping 'keylookup("suppliers", "companyname","{}", supplierid)' | ||
</code> | </code> | ||
Latest revision as of 20:56, 28 March 2018
Contents
Purpose
Column constraint to specify the display data mapping for a column
Syntax
SET GETDATAMAPPING <expC>
See Also
ALTER TABLE, CONSTRAINTS, CREATE TABLE, Data Mapping, FIELDCHOICES(), GETDATAMAPPING(), INDEX, KEYLOOKUP(), SETDATAMAPPING(),
Description
A constraint is used to define rules that help to provide data integrity. Column constraints are specific to the column name specified. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.
The GETDATAMAPPING column constraint is used to specify the display data mapping for a column.
Example
open database southwind alter table "products" modify constraint supplierid; set choices 'select companyname from suppliers order by companyname' alter table "products" modify constraint supplierid: set getdatamapping 'keylookup("suppliers", "supplierid",{}, companyname)' alter table "products" modify constraint supplierid; set setdatamapping 'keylookup("suppliers", "companyname","{}", supplierid)'
