SELECT - SQL's NOFILTER Clause Forces Physical File in VFP 5.0

 Last reviewed: January 10, 1997
Article ID: Q155928
The information in this article applies to:
  • Microsoft Visual FoxPro for Windows, version 5.0

SUMMARY

The new SELECT ... INTO CURSOR ... NOFILTER clause causes a cursor to be created that has a corresponding physical file.

MORE INFORMATION

In previous versions of FoxPro, the following code generates an error: 

   SELECT * FROM customer INTO Cursor temp
   SELECT * FROM temp INTO Cursor temp2
The following error, 1815, is generated: 

   'TEMP' must be created with SELECT...INTO TABLE.
The following code was frequently used as a workaround in previous versions of FoxPro: 

   SELECT *,.T. FROM customer INTO Cursor temp
   SELECT * FROM temp INTO Cursor temp2
The extra column created by the .T. causes a physical file to be created, which can have subsequent SELECT - SQL statements run against it.

In FoxPro 5.0, you can use the following code instead: 

   SELECT * FROM customer INTO Cursor temp NOFILTER
   SELECT * FROM temp INTO Cursor temp2
The NOFILTER clause forces the SELECT to create a physical file that can have SELECT - SQL statements run against it, without adding more columns.

When the cursor is closed, the physical (temp) file is deleted.

KBCategory: kbprg
KBSubcategory: FxprgSql
Additional reference words: 5.00 kbdse VFoxWin



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Last reviewed: January 10, 1997
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