SQLite: Fix handling of keywords as identifiers

[ad-si]

This should work:

SELECT 1 AS open

but currently yields following error:

:1:13:
SELECT 1 AS open
            ^
(line 1, column 13):
unexpected Identifier Nothing "open"

[ad-si]

Probably the same problem:

CREATE TABLE "edit" (name TEXT)

currently fails with:

edit() is not supported.