Add valuesort, new control result mode and value normalizer

[Omega359]

I've adding some functionality to support running the sqlite test suite against another database and this PR is the initial part of that work. This PR adds:

• valuesort from PR test against sqlite's test suite #123
• a new control resultmode of either valuewise or rowwise (defaulting to the latter)
• a new value normalizer to allow for different value normalization for different files

The last point is a breaking API change so I took the liberty to rev the version #. If that isn't desired feel free to revert that portion of this PR.

With this PR I am able to run a slightly cleansed sqlite test suite using the Datafusion sqllogictest harness.

[Omega359]

@xxchan - any chance this could get a review?

[alamb]

For context, we are trying to run DataFusion against the entirety of the sqlite test corpus:

• Complete / integrate sqlite sqllogictest test scripts integrattion apache/datafusion#13812

[skyzh]

LGTM, thanks, and happy holiday :)

A general question: does sqlite only do string comparison? What's their behavior of valuesort on an integer column? Currently we only sort by string, and could order 10 before 2. If they handle column types other than string, we probably need to add a custom comparator in the future?

[skyzh]

could you please also help add a test case for valuesort? (might require some modifications for FakeDB)

[Omega359]

LGTM, thanks, and happy holiday :)

Thanks, and you too!

A general question: does sqlite only do string comparison? What's their behavior of valuesort on an integer column? Currently we only sort by string, and could order 10 before 2. If they handle column types other than string, we probably need to add a custom comparator in the future?

From their docs:

Sort comparisons use strcmp() on the rendered ASCII text representation of the values. Hence, "9"
sorts after "10", not before. The "valuesort" mode works like rowsort except that it does not honor 
row groupings. Each individual result value is sorted on its own.

So it's the same string comparison as what is done here.

[skyzh]

just released a new version :)

[alamb]

just released a new version :)

Wow -- talk about speedy service with a smile. Thank you @skyzh -- very much apprecaited