INFO: Using Independent (Nonstructural) Compound Index Files

ID: Q92357

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 3.0, 5.0, 6.0
Microsoft FoxPro for MS-DOS, versions 2.0, 2.5, 2.5a
Microsoft FoxPro for Windows, versions 2.5, 2.5a

SUMMARY

Microsoft FoxPro supports two types of .cdx compound index files: structural and independent (nonstructural). An independent compound index file is created by specifying an OF clause in the INDEX command.

Unlike the structural index file, an independent index file is not opened when the associated database is opened. To open the index, use the SET INDEX command or the INDEX clause of a USE command.

MORE INFORMATION

The information below demonstrates how to create, open, and specify the order of an independent .cdx file with multiple tags.

To create an independent index for a database, use commands such as the following. Note that the name of the .cdx file cannot be the same as the name of the database.


   USE OFFICES
   INDEX ON ONO TAG ONO OF Xoffices.cdx
   INDEX ON CITY TAG CITY OF Xoffices.cdx
   INDEX ON STATE TAG STATE OF Xoffices.cdx

To open a database with an associated independent .cdx file, use code such as the following: USE OFFICES INDEX Xoffices.cdx * Set the order and list to demonstrate each tag is correct. SET ORDER TO TAG ONO OF Xoffices.cdx LIST SET ORDER TO TAG CITY OF Xoffices.cdx LIST SET ORDER TO TAG STATE Of Xoffices.cdx LIST

Additional query words: VFoxWin FoxDos FoxWin idx index structural compound

Keywords : FxprgGeneral
Version : MS-DOS:2.0,2.5,2.5a; WINDOWS:2.5,2.5a,3.0,5.0,6.0
Platform : MS-DOS WINDOWS
Issue type : kbinfo