More arguments to dbListObjects() to narrow result set

[krlmlr]

Default: NA.

[krlmlr]

I don't remember what this was about. We already have a prefix = NULL argument. Further restricting the number of returned objects may be important for an object browser, but is discussed elsewhere.

[krlmlr]

Definitely, this was about filtering. I think we should:

• offer an option to restrict the number of objects returned
• offer ways to further restrict the objects on the database: "starts with", "ends with", "contains", ...

[krlmlr]

Reference: r-dbi/odbc#158 (comment).

[krlmlr]

I no longer think dbListObjects() is a good API -- dm_meta() is more promising.