Difference between revisions of "USED()"
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==Class== | ==Class== | ||
Table Basics | Table Basics | ||
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==See Also== | ==See Also== | ||
| − | [[ | + | [[ALIAS()]], [[DBF()]], [[INUSE()]], [[NDX()]], [[NETERR()]], [[SELECT()]], [[SET CACHELOAD]], [[SET DCACHE]], [[SET EXCLUSIVE]], [[USE]] |
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==Description== | ==Description== | ||
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[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Functions]] | [[Category:Functions]] | ||
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| + | [[Category:Table Basics Functions]] | ||
Revision as of 11:40, 9 June 2009
Class
Table Basics
Purpose
Function to determine if a table is open
Syntax
USED([<expN> | <expC>])
See Also
ALIAS(), DBF(), INUSE(), NDX(), NETERR(), SELECT(), SET CACHELOAD, SET DCACHE, SET EXCLUSIVE, USE
Description
The USED() function with no parameter specified, returns .T. if there is a table open in the current workarea and .F. if the current workarea is empty. <expN> is a numeric expression giving a workarea number: 1-DB_MAXWKA in which to check for an open table. <expC>is a character expression giving a workarea letter, (A-Z/a-z excluding M/m) or a table alias in which to check for an open table. The alias can be specified in the USE command. If not specified, the table basename is used.
Example
// The demo view bridge opens // the tables customer, accounts, // state and products in workareas 1 – 4 use demo ? select() 1 ? used() .T. ? used("product") .T. ? used(5) .F.
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
