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Replacing a segment(REPL call):

The REPL call is used to update the segment occurrence of the database. This has to be preceded by a successful Get-Hold call. Once the segment is in the I/O area, the program can make any desired changes other than modifying the key field. Suppose, if a SHIPTO segment is to be modified.

The following is the DL/I call sequence required to this task.

Step2 :	REPL

After retrieving the desired SHIPTO segment with the Get-Hold call and making the necessary changes to the segment image in the I/O area, the program then issues a call using the REPL function code.

When a program uses a Get-Hold path call to bring more than one segment into the I/O area, the Get-Hold path call can be followed by a replace call that references one or more SSAs. When multiple segments are retrieved using a Get-Hold path call and a Replace call is issued with no SSAs, all the retrieved segments are replaced. The Replace call can reference SSAs that include the N command code to indicate which segments are not to be replaced.

Status Code Check:

When REPL call is issued to delete segment occurrences of a database, the status codes for the following codes needs to be checked. " "(Blank), "DJ", "DA".

Blank indicates that the replace call is successful. Return Status "DJ" indicates that the program has issued a replace call without a preceding Get-Hold call. The "DA" status code is returned, if the key field of the segment image in the I/O area is changed before the program issues the replace call.

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