http://www.perlmonks.org?node_id=1096136


in reply to Using Two Different Database types in Perl

You definitely need to reduce this to a test-case that clearly demonstrates the (minimal) problem.   My suspicions of a bug in your program are aroused by what you say ... “the same SQL.”   You need to be absolutely certain that you are performing the same steps each time:   connect, prepare the SQL query (from a text string), execute the query, close everything, disconnect.   Leaving out none of these steps, and not re-using any Perl object.   That’s why a short piece of example code is needed.