Jira issue originally created by user patxi1980:
When using the matching method of a persistentCollection with a Criteria that contains a call to isNull, the SQL generated contains "field = null" instead of "field IS null"
Comment created by patxi1980:
Seen that the code is fixed in the 2.3 branch, but it isn't in the last stable release (2.3.0)
Issue was closed with resolution "Invalid"