Talk:Java Persistence/Tables

Tables with special characters and mixed case
"This is normally not a big deal with JPA where you rarely use the table and column names directly from your application, but can be an issue in certain cases if using native SQL queries." - which databases, what circumstances? A link to some common caveats would be useful here.

Table qualifiers, schemas, or creators
"In JPA a table qualifier can be set on a table through the schema or catalog attribute. Generally it does not matter which attribute is used as both just result in prefixing the table name. Technically you could even include the full name "schema.table" as the table's name and it would work. The benefit of setting the prefix in the schema or catalog is a default table qualifier can be set for the entire persistence unit, also not setting the real table name may impact native SQL queries."

What is a qualifier? What is it used for? This section assumes knowledge about something I might want to use, but have got to visit google to find out about...