Forces the immediate display of the heading without waiting for the next non-suppressed data row.
{IMMHEADING}
Under normal circumstances, the heading only appears when at least one
non-suppressed row is ready to be output on the current page. For this
reason, when any suppression commands are turned on (such as SUPMISSING
or SUPZEROS), and an entire page is suppressed, those page headers are
normally skipped entirely.
An occurrence of the IMMHEADING command prints the header immediately,
even if there is no current row to print. This command does not unsuppress
data, but simply prints its headings.
This command is useful for inserting special formatting between the heading and the first output record. This is usually impossible because the header does not print until it is ready to output data immediately, that is, after any formats associated with the row have been processed.
See the example for STARTHEADING for an example of a heading.
ENDHEADING
HEADING
STARTHEADING
SUPHEADING
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