Scrollable cursors
Informix®
Informix SQL and Genero BDL support scrollable
cursors when you specify the
SCROLL clause in the DECLARE
cursor instruction:DECLARE c1 SCROLL CURSOR FOR SELECT ...Important:
Informix does not allow to fetch TEXT/BYTE columns with
scrollable cursors. If you declare a scroll cursor with a SELECT containing
TEXT/BYTE columns, Informix will produce the SQL error -611 when executing the
OPEN instruction.
Netezza®
Netezza does not support scrollable cursors.
Solution
The Netezza database driver emulates scrollable cursors by fetching rows in a temporary file.