Get the total number of sdrecords in this sditerator.
Synopsis
length()
Description
Returns the total number of sdrecords that are found in this sditerator.
Note that for the flat-table data set, this may require examining each
row of the table to see if there is more than one sdrecord stored in
that row hence this may be an expensive operation for that type of table.
Using
more and
next
is always a faster way to step through (iterate)
an sditerator (rather than using
length and
setlocation in a for loop).
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