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Maximum Number of records with a memo

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    Maximum Number of records with a memo

    Hi,

    This is for Alpha4v4

    I looked everywhere for this information and couldn't find it. I know that an A4 table can hold up to two billion records. Can the dbt file hold also 2 billion records or is there a limit?

    I know the question is odd, but in Clipper, for example, there was a maximum number of memo entries and once that amount was exceeded you started getting cross-linking of memo's and records.

    I have a client who's database is showing some cross-linking and I need to get to the bottom of this. The table with the problem has about 690,000 records (don't know how many of those have memo data, though).

    Thank you!!!!

    Alex

    #2
    Re: Maximum Number of records with a memo

    Hi Alex,

    If I recall correctly, the .DBT file is a kind of sequential data file that gets 512-byte blocks appended each time a memo field has data added or edited, with an appropriate change to the pointer in the .DBF.

    Since the .DBT is referenced by pointers residing in the .DBF, there can only be as many unique pointers as can be stored by the .DBF--so I believe there is the same 2billion record limitation in the .DBT.

    It's just that the .DBT itself doesn't have such a limitation.

    -moy

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