DATACOMPRESS Details (↑ Format of Your Data Files)
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The only value that can be specified for Micro Focus data compression
is 1. Values in the range 128 through 255 indicate user-defined
compression routines
You need specify data compression only when creating the file.
Subsequently, the data compression will be detected when the
file is opened.
To get data compression on an individual file, use $SET statements
in your source so that this directive is in effect only for the
part of the source containing the file's SELECT statement.
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