Difference between revisions of "RELATION()"
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==Purpose== | ==Purpose== | ||
Function to return table-linking expression | Function to return table-linking expression | ||
Revision as of 16:03, 28 October 2009
Purpose
Function to return table-linking expression
Syntax
RELATION(<expN>)
See Also
TARGET(), DBRELATION(), SET RELATION, CREATE VIEW, CREATE BRIDGE, SET VIEW, USE, DBRSELECT()
Description
The RELATION() function is synonymous with the DBRELATION() function. The RELATION() function returns the linking expression of a specified relation in the current workarea. The <expN> specifies the position of the desired linking expression from the list of previously defined relations. By default, the Recital environment supports 20 workareas but this can be increased, by setting the environment symbol DB_MAXWKA to a higher value, which allows for up to (DB_MAXWKA-1) relationships. The RELATION() function always returns a character string in lower case. If there is no linking expression defined for the <expN> selected, a null string will be returned.
Example
use shows in 2 index pcode use patrons in 1 set relation to patron_code into shows ? relation(1) patron_code ? target(1) 2
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
