The following bug has been logged on the website:
Bug reference: 8837
Logged by: Kurt Rayner
Email address: kurt(at)alphasoftware(dot)com
PostgreSQL version: 9.3.2
Operating system: Windows
Description:
The PostgreSQL ANSI ODBC driver reports 42P18 - ERROR: could not determine
data type of parameter $<n>; when preparing SQL with an expression of the
form:
<bound parameter> IS NULL.
This is a breaking change to existing code that depends on being able to
check the NULL-ness of a parameter.
This behavior is new as of 9.03.01.00.