topic Re: sequential files in Application Development and Automation Discussions

sequential files

Former Member — Sun, 17 Jun 2007 13:03:13 GMT

what are sequential files,briefly explain about them please?

Re: sequential files

Former Member — Sun, 17 Jun 2007 13:40:41 GMT

Hi,

Sequential files are files with specific format. You upload data into SAP using sequential files.

ABAP allows you to use sequential files located on the application server or presentation server. You can use these files to buffer data, or as an interface between local programs and the R/3 System.

http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3c72358411d1829f0000e829fbfe/frameset.htm

Hope this will help.

Regards,

Srilatha.

Re: sequential files

Former Member — Sun, 17 Jun 2007 19:03:33 GMT

Sequential files are the files which are stored at application server

to read them or to put the data into them we use the DATASET concepts for transfering data

OPEN data set is used to open the file

READ dataset for reading the file

TRANSFER dataset for transfering/writing the data

CLOSE dataset to close the dataset

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Regards

Anji

Re: sequential files

Former Member — Sun, 17 Jun 2007 19:18:43 GMT

Check with FILE Transaction

Re: sequential files

Former Member — Mon, 18 Jun 2007 06:42:50 GMT

In ABAP, there is a range of statements for processing data that is stored in sequential files on the application server instead of the database.

· OPEN DATASET opens a file for a particular type of access and storage.

· TRANSFER transfers the contents of a data object to a file.

· READ DATASET transfers data from a file to a data object.

· GET DATASET using the addition POSITION the current position of the file pointer in a file is ascertained. Using the addition ATTRIBUTES further characteristics of the file are obtained.

· SET DATASET using the addition POSITION the position of the file pointer is specified. Using the addition ATTRIBUTES further characteristics of the file can be specified.

· TRUNCATE DATASET sets the end of a file to a specified value, thereby changing the size of the file.

· CLOSE DATASET closes a file.

· DELETE DATASET deletes a file.

For further details about these statements and their additions, see the keyword documentation.

During sequential file operations, the system performs a range of automatic checks, some of which may lead to runtime errors.

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Girish