When using the new statements, it is possible to employ freely definable file link names to address SAM and ISAM files. Here, it is essential that at least the file name is entered in the Task File Table.
In the case of existing files only a few of the attributes are taken over from the Task File Table. These are (if specified):
FILE-NAME WRITE-CHECK
In the case of ISAM files, the following attributes are also taken over:
WRITE-IMMEDIATE DUPLICATE-KEY PADDING-FACTOR SHARED-UPDATE
All the other specifications are ignored and are taken over from the existing file.
In the case of newly created files, more of the attributes specified in the Task File Table are taken over. These are (if specified):
FILE-NAME ACCESS-METHOD RECORD-FORMAT RECORD-SIZE PRINT-CONTROL BLOCK-SIZE BLOCK-CONTROL WRITE-CHECK
In the case of ISAM files, the following attributes are also taken over:
KEY-LENGTH KEY-POSITION WRITE-IMMEDIATE DUPLICATE-KEY PADDING-FACTOR VALUE-FLAG-LENGTH PROPAGATE-VALUE-FLAG LOGICAL-FLAG-LENGTH SHARED-UPDATE
All other specifications are always ignored.
The access method specification is only used if there is no explicit specification in the corresponding statement.