If I set a DatabaseImportDescriptor for a database range in calc to
an SQL statement, when I do the import, it appears that calc *always* attempts
to parse the SQL, even when the IsNative flag is set to True. This is a problem
because I want to send a stored function query to a postgresql database; OOo
cannot parse such a query, so it must be send in Native mode (which works in
other situations like in Base queries).

Here's a basic script to show what I'm doing:

Sub Main
dbRange = ThisComponent.DatabaseRanges.getByName("mydbRange")
desc() = dbRange.ImportDescriptor
desc(0).Name = "DatabaseName"
desc(0).Value = "MyDB"
desc(1).Name = "SourceType"
desc(1).Value = com.sun.star.sheet.DataImportMode.SQL
desc(2).Name = "SourceObject"
desc(2).Value = "select * from generate_series(0,10);"
desc(3).Name = "IsNative"
desc(3).Value = True
dbRange.getReferredCells.doImport(desc())
End Sub

This macro fails with "Syntax error in SQL expression". 

However, the query works in postgresql natively and from OO-Base, provided
Native mode is selected.