Zend/Db/Sql/Insert - implement insert into select construction

[turrsis]

recreate the #5143

[Maks3w]

@turrsis Can you update this PR with the late bindings of #4907 ?

[turrsis]

@Maks3w see my comment in your PR

[turrsis]

@Maks3w updated.

[Maks3w]

@turrsis Could you highlight your changes? Seems that you'v added more stuff since my last review

[turrsis]

@Maks3w this PR was rebased to top develop branch and changed self to static in this lines:
https://github.com/zendframework/zf2/pull/5260/files#diff-4d52e83107f25ed8d892784fa282ca3cR269
https://github.com/zendframework/zf2/pull/5260/files#diff-4d52e83107f25ed8d892784fa282ca3cR280

[Maks3w]

Please add a use for this.

[ralphschindler]

After chewing over this, I think I'd feel better if this was a class of its own. This feels like a mostly different responsibility, one which I think most people would not directly associate with the normal use cases of INSERT. That said, what if we created a class called InsertSelect that extended Insert with this additional functionality?

[turrsis]

To my mind this is the same responsibility - http://en.wikipedia.org/wiki/Insert_(SQL)
In all manuals you can read two case, analog :

function insert($data) {
   if ($data instanceof Select) {
      $data = $data->execute()->toArray();
   } elseif ($data instanceof Url){
      ....
   }
   ...
}

As simple user i want put in $data parameter anything, such as http://www.accuweather.com/en/us/new-orleans-la/70112/weather-forecast/348585 , but programmers is limit my desires :)

[ralphschindler]

Sold. Good arguments, I'll merge to develop.

[ralphschindler]

Question on the API though- while I like select(Select $select);, using select() and values() are mutually exclusive. So why not have select() simply be a convenience method that proxies to values(), and as for teh internals, the $values property would either be an array of values or a Select object. Thoughts?

[turrsis]

@ralphschindler That's what you've suggested?

[ralphschindler]

Yeah, I think that looks pretty good.

[turrsis]

@ralphschindler Can you merge this, if ok?

[weierophinney]

@ralphschindler Based on your comments, I'm marking this for 2.3.0. Change the milestone if you feel differently.

[ralphschindler]

@turrsis Overall I like this, but I think it makes sense (until 3.0) to just use the protected $values to house the Select object. Also, (to that effect), I think it makes sense that values() accepts the Select object. I am going to start working on these small changes and unit tests to merge, unless you have an immediate objection.