Visual FoxPro Capacities

• Microsoft Visual FoxPro for Windows, version 3.0

SUMMARY

This articles lists Visual FoxPro's System capacities in the following areas:

• Tables and Index files.
• Field Characteristics.
• Memory Variables and Arrays.
• Program and Procedure Files.
• Report Designer Capacities.
• Miscellaneous Capacities.

MORE INFORMATION

NOTE: Some of Visual FoxPro's capacities may be limited by available memory.

Table and Index Files

Maximum # of records per table file             1 billion  (1)
Maximum # of characters per record                 65,500
Maximum # of fields per record                        255
Maximum # of tables open at one time                  255
Maximum # of characters per table field               254
Maximum # of characters per index key (.IDX)          100
Maximum # of characters per index key (.CDX)          240
Maximum # of open index files per table         unlimited  (2)
Maximum # of open indexes in all work areas     unlimited  (2)
Maximum # of relations                          unlimited
Maximum length of relational expressions        unlimited

Field Characteristics

Maximum size of character fields                      254
Maximum size of numeric (and float) fields             20

   in a free table                                     10

   in a table contained in a database                 128
Minimum value of an integer                -2,147,483,647
Maximum value of an integer                 2,147,483,647
Digits of precision in numeric computations            16

Memory Variables and Arrays

Default # of memory variables                       1,024
Maximum # of memory variables                      65,000
Maximum # of arrays                                65,000
Maximum # of elements per array                    65,000

Program and Procedure Files

Maximum # of lines in source program files      unlimited
Maximum size of compiled program modules              64K  (3)
Maximum # of procedures per file                unlimited
Maximum # of nested DO calls                          128
Maximum # of READ nesting levels                       10
Maximum # of nested structured programming commands   384
Maximum # of procedure arguments                       27
Maximum # of transactions                               5

Report Designer Capacities

Maximum # of objects in a report definition     unlimited  (2)
Maximum length of a report definition                  20 inches
Maximum # of grouping levels                          128

Miscellaneous Capacities

Maximum # of open windows (all types)           unlimited  (2)
Maximum # of open Browse windows                      255
Maximum # of characters per character string            2 gigabytes
Maximum # of characters per command line            8,192

   a report                                           252
Maximum # of characters per macro subst. line       8,192

Maximum keystrokes in keyboard macro                1,024

SELECT statement                                      255

Notes

(1) The actual file size (in bytes) cannot exceed two gigabytes for single-user or exclusively opened multiuser .DBF files. Shared multiuser .DBF files with no indexes or .IDX indexes cannot exceed one gigabyte. All Visual FoxPro tables and shared multiuser 2.x .DBF files with structural .CDX indexes cannot exceed two gigabytes.

(2) Limited by memory and available file handles. .CDX files use only one file handle.

(3) A program module is one procedure. A program or application can contain an unlimited number of program modules.