+-------------------------------IBM Extension--------------------------------+
Null-capable fields are supported when the READ statement is performed on a file which is found on a DISK or DATABASE device.
However, null values are only supported for DATABASE files that have ALWNULL specified on their ASSIGN clause. If ALWNULL is not specified, the READ operation will fail and file status 90 will be returned, if a field contains a null value. You should also specify NULL-MAP/NULL-KEY-MAP on your READ statement, so you can see which fields contain the null value.
+----------------------------End of IBM Extension----------------------------+
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