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File Interface in ABAP Release 6.10 The file interface in ABAP_RELEASE 6.10 has been completely overhauled. The changes and developments affect the following topics: ITOC
ABAP_MODIFICATION_NN Adapting to Unicode
Extensive changes to the file interface have been made as a result of the switch to Unicode.
ABAP_MODIFICATION_NN Reading and Changing File Properties at Runtime
The statement GET DATASET ... returns both the current reading or write positions and the file properties. In turn, a required file position can be set at runtime using the statement SET DATASET .... It is also possible to change the properties of the file, but the system only applies values compatible with the opening mode.
ABAP_MODIFICATION_NN New Classes for Converting Files
Three classes have been implemented for file conversion: CL_ABAP_CONV_IN_CE: Instances of this class enable the conversion of external binary data to valid ABAP data objects CL_ABAP_CONV_OUT_CE: Instances of this class convert ABAP data objects to binary data. CL_ABAP_CONV_X2X_CE: Instances of this class enable the text data of various character sets and the numeric data of various number formats to be transformed.
ABAP_MODIFICATION_NN Support for Files Greater than 2 Gigabytes
Files greater than 2 gigabytes can now be read and written on all platforms that support large files. Only the platforms OS/390 and IBM System i (previously AS/400) are currently not included in this change. Additionally, the statement OPEN DATASET has been enhanced in such a way that, when opening a file, the file pointer also addresses positions greater than 2 gigabytes.
ABAP_MODIFICATION_NN Limiting Data Range when Reading Files
The amount of data to be read can be limited using the addition MAXIMUM LENGTH maxlen. Depending on the mode in which the file was opened, maxlen defines the maximum number of characters or bytes that are to be read from the file.
