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what is importance of 'MAPFLD' IN OPNQRYF FILE ?
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Answer / elan
Specifies the definition of query fields that are
mapped or derived from other fields. MAPFLD is generally
not needed if the field names specified on other parameters
are simple field names that exist in only one of the file,
member, and record format elements specified for the File
specifications (FILE) parameter.
Up to 50 mapped field definitions can be specified.
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