A data storage structure.
A MultiValue file is a data storage structure created using Caché global variables. It is a fundamental part of MultiValue database architecture, corresponding to the UniVerse or UniData hashed data or dictionary file.
A MultiValue file is created using the CREATE.FILE
verb. It is cataloged in the VOC file as a global variable, and can be concurrently accessed by multiple processes. You can use the FILEINFO
function to determine the pathname of the global variable.
statement opens a MultiValue file and returns the filevar
local variable. This filevar
is used for all subsequent MVBasic operations on this MultiValue file:
is used to write data to a MultiValue file.
is used to read data from a MultiValue file.
is used to delete a data record from a MultiValue file.
is used to delete all data records in a MultiValue file.
is used to read the record identifiers from a MultiValue file into a select list. These record identifiers can then be individually read using the READNEXT
is used to close a MultiValue file, resetting filevar
function is used to determine the status of filevar
and other information about a MultiValue file.