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.