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In its default configuration, the ADSDBE uses Clipper compatible file formats for memo (DBT) and index (NTX) files, compatible record locking schemes and checks file access rights defined for a user on the file server. These default settings can be overridden using DbeInfo().

ADSDBE_TBL_MODE

There are two constants defined in ADSDBE.CH that allow for selecting the file formats used by the ADS:

A) DbeInfo( COMPONENT_DATA , ADSDBE_TBL_MODE, ADSDBE_NTX )
DbeInfo( COMPONENT_ORDER, ADSDBE_TBL_MODE, ADSDBE_NTX )

B) DbeInfo( COMPONENT_DATA , ADSDBE_TBL_MODE, ADSDBE_CDX )
DbeInfo( COMPONENT_ORDER, ADSDBE_TBL_MODE, ADSDBE_CDX )

C) DbeInfo( COMPONENT_DATA , ADSDBE_TBL_MODE, ADSDBE_ADT )
DbeInfo( COMPONENT_ORDER, ADSDBE_TBL_MODE, ADSDBE_ADT )

The first (variant A) is the default setting and selects the Clipper compatible file formats for index (NTX) and memo (DBT) files. This complies with the file specifications for the Xbase++ Database Engines DBFDBE and NTXDBE.

The second (variant B) selects FoxPro compatible file formats. The ADS uses CDX index files and FPT memo files in this case. They are compliant with the file specifications for the CDXDBE and FOXDBE of Xbase++.

The third (variant C) selects Advantage properitary file formats. The ADS uses ADI index files and ADM memo files in this case. For more information please be referred to the Advantage Database Server documentation.

Yes, ADSDBE_MEMOFILE_EXT is RO. But, it has to be used ADSDBE_TBL_MODE which is RW.