Github user tzolkincz commented on the pull request:
https://github.com/apache/incubator-phoenix/pull/30#issuecomment-43854734
I've finally rewrite syntax, as was mentioned. So there is summary:
```
SELECT LAST_VALUE(val) WITHIN GROUP (ORDER BY date ASC) FROM table GROUP BY
column
```
```
SELECT NTH_VALUE(val, 2) WITHIN GROUP (ORDER BY date DESC) FROM table GROUP
BY column
```
and for sake of completeness alias of LAST_VALUE with inverted order
```
SELECT FIRST_VALUE(val) WITHIN GROUP (ORDER BY date ASC) FROM table GROUP
BY column
````
@jtaylor-sfdc I had to change some code at ParseNodeFactory (L 366), could
you please review it?
And what do you think about FIRST_VALUE alias?
Thanks
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