Ограничения Foxpro

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Table and Index Files

Max. # of records per table                        1 billion*        

Max. # of chars per record                        65,000        

Max. # of fields per record                        255        

Max. # of open DBFs                                225        

Max. # of chars per field                        254        

Max. # of chars per index key (IDX)        100        

Max. # of chars per index key (CDX)        240        

Max. # of open index files per table        unlimited**        

Max. # of open index files in all work areas        unlimited**        

 

* The actual file size (in bytes) cannot exceed 2 gigabytes for single-user or exclusively opened multi-user tables. Shared tables with no indexes or .IDX indexes cannot exceed 1 gigabyte. Shared tables with structural .CDX indexes cannot exceed 2 gigabytes.

** Limited by memory. In FoxPro for MS-DOS and FoxPro for Windows, also limited by available MS-DOS file handles. Each .CDX file uses only 1 file handle. The number of MS-DOS file handles is determined by the CONFIG.SYS FILES parameter.

 

Field Characteristics

Max. size of character fields                        254        

Max. size of numeric fields                                20        

Max. # of chars in field names                        10        

Digits of precision in numeric computations        16        

©Drkb::02933

Взято с Delphi Knowledge Base: http://www.baltsoft.com/