IDXFORMAT
The IDXFORMAT option specifies the format to use when creating indexed
files.
Syntax:
IDXFORMAT=integer
Parameters:
0 |
Default format for the operating system. For Net Express
this is equivalent to format 3. For Server Express this is equivalent to format
1 for fixed-length files and format 3 for variable-length files. |
1 |
C-ISAM |
3 |
Micro Focus default indexed file format |
4 |
Optimized format for fast duplicate key handling |
5 |
Net Express |
Btrieve with ANSI conformance |
Server Express |
Reserved |
|
6 |
Net Express |
Btrieve without ANSI conformance |
Server Express |
Reserved |
|
8 |
Large indexed file format |
Properties:
Comments:
The duplicate occurrence value is a unique identifier, which is added to
the key, which has duplicates in order to make it unique. When a new key is
added, where keys of the same value exist, then the occurrence value of the
last added key is incremented by one and used for the newly added key. If keys
are deleted, no change is made to the keys, which are not deleted and so if the
highest occurrence of the series of duplicates is not deleted, then the highest
value does not change. If the highest occurrence is deleted, then the highest
occurrence value reduces to the next lower still existing occurrence value.