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RELEASE

Description

The RELEASE statement enables a program to explicitly release record locks without updating the records using WRITE. It takes the general form:

RELEASE {{variable,} expression}

Where:

If variable is specified it should be a valid file descriptor variable (i.e. It should have been the subject of an OPEN statement)

If an expression is supplied it should evaluate to the record key of a record whose lock the program wishes to free.

If variable was specified the record lock in the file described by it is released. If variable was not specified the record lock in it releases the file described by the default file variable If RELEASE is issued without arguments then all record locks in all files that were set by the current program will be released.

Note: 

Where possible the program should avoid the use of RELEASE without arguments; this is less efficient and can be dangerous - especially in subroutines.

An example of use is as:

READU Rec FROM File, "Record" ELSE ABORT 203, "Record"
IF Rec<1> = "X" THEN
    RELEASE File, "Record"
END


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