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<h1 class="topictitle1">Conversion between zoned decimal and character or hexadecimal in a
DDS file</h1>
<div><p>You can convert zoned decimal fields to character or hexadecimal
fields and the converse, provided that the field lengths are the same.</p>
<p>The data type of the field in your program is the data type specified in
the logical file. No error occurs in an I/O operation if the data passed contains
only numeric characters (0 through 9). However, your program cannot send an
I/O operation that attempts to pass characters other than 0 through 9 from
a character or hexadecimal field to a zoned decimal field. The operating system
sends a message and the I/O operation cannot be completed.</p>
<p>For example, suppose that a field is zoned decimal in the
physical file. If you specify character type (A) for presentation to your
programs, you must ensure that the field contains only numeric characters
(0 through 9) when it is returned through the logical file to the physical
file.</p>
<p>In another example, suppose a field is a character field in the physical
file. If you specify the field as a zoned decimal field and as a key field
in the logical file, you cannot create the logical file unless all records
in the physical file contain only numeric characters (0 through 9).</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="ldata.htm" title="For a physical file, use this position to specify the data type of the field within the database. Specify data type in a logical file only to override or change the data type of the corresponding field in the physical file on which this logical file is based.">Data type for physical and logical files (position 35)</a></div>
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