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Obsolete IDL Features: Routines with Obsolete Arguments or Keywords |
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The following keywords to the READU procedure are obsolete.
| Note The obsolete VMS routines FORRD, and FORRD_KEY have been replaced by the READU command used with the following keywords. |
The index key to be used (primary = 0, first alternate key = 1, etc...) when accessing data from a file with indexed organization. If this keyword is omitted, the primary key is used.
The relation to be used when matching the supplied key with key field values (EQ = 0, GE = 1, GT = 2) when accessing data from a file with indexed organization. If this keyword is omitted, the equality relation (0) is used.
The value of a key to be found when accessing data from a file with indexed organization. This value must match the key definition that is determined when the file was created in terms of type and size—no conversions are performed. If this keyword is omitted, the previous key value is used.
IDL Online Help (March 06, 2007)