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Using logical processing
Using LCDS Print Description Language 3-21
– If the operator is NE, LT, GT, LE, or GE, the system tests
the variable data against only the first value in the TABLE
CONSTANT statement.
Performance
considerations
with the CRITERIA
VALUE parameter
CRITERIA VALUE affects system performance in relation to the
number of characters per page involved. This is a function of the
number of tests performed, the number of character columns in
each test, and the number of lines in which the criteria is
evaluated.
The following actions can help you reduce the impact of
CRITERIA VALUE processing on your printer throughput speed
when printing your applications:
• Restrict the range of lines tested via the LINENUM
parameter. This avoids time spent with unnecessary testing
of lines that are not supposed to meet the criteria in any case.
For example, in a forms application with an address field at
the top and mailing information at the bottom, you might use
the LINENUM command to prevent tests on the data
associated with the address label and mailing info.
• Restrict the columns tested in the CRITERIA VALUE
parameter to the shortest possible length, to avoid testing
blank space. However, you should be sure that you are
providing for all possible values. For example, you should not
limit the column size to space enough for only $999,999 if
there is a chance that $1,000,000 might occur on a rare
occasion.
• For applications in which either CRITERIA VALUE or
CRITERIA CONSTANT can be used, choose CRITERIA
CONSTANT, because it has less performance impact.
• When coding numeric values into TABLE CONSTANTs, for
maximum performance, specify the shortest possible numeric
string. Omit superfluous leading zeros, trailing zeros, white
space, and “thousands” separators. For example, use
‘50000’ instead of ’050,000.00.’ Because the former
expresses the same value as the latter but with only half as
many characters, it takes much less time to process.
CRITERIA VALUE
parameter syntax
example
criid: CRITERIA VALUE=(offset, length, GT, tabid),
LINENUM=(init, count);