select instances aka databases with one query

[dgf-hogrefe]

In a server environment with thousands of databases, the original iterative retrieval of database information is extremely slow and results in a Puppet run taking minutes to complete. This change replaces these queries with a single one by querying all relevant attributes from the information schema.

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[jst-cyr]

Hey there @dgf-hogrefe , I'm sorry there hasn't been any activity here yet. I'm reviewing old PRs and am wondering if this is still an issue you are seeing?

[jst-cyr]

Closing for now. If a need comes up in the future, we can reopen.