[Progress Communities] [Progress OpenEdge ABL] Forum Post: RE: The history of VST changes by versions

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gus bjorklund

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> On Dec 17, 2019, at 10:06 AM, George Potemkin wrote: > > _Db._Db-res1[1] stores the "Large Keys Support" flag these "res" fields were put in so that if we needed to add something we could do it without a database version change. at times we used them for things like the large keys flag. the intent was that in the next major release, they would be replaced by properly named fields. this did not always happen. the dataservers were orginally on a different release cycle than the main product so they used a lot of the "res" fields for their own purposes. a given field might be used for one thing by the oracle dataserver and something else by the sybase dataserver. later we added the feature bitmaps so we could add new things without waiting for the next (major) release that included a database version change.

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