Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/454#issuecomment-97451967
Thanks @sirpkt, but query results are still different.
Would you check it again?
**Tajo**
```
default> select l_partkey, l_tax, first_value(l_linestatus) over (partition
by l_partkey order by l_tax rows between 5 preceding and 8 following) from
lineitem;
l_partkey, l_tax, ?windowfunction
-------------------------------
1, 0.0, F
1, 0.0, F
1, 0.01, F
1, 0.01, F
1, 0.01, F
1, 0.02, F
1, 0.02, O
1, 0.02, F
1, 0.03, O
1, 0.03, F
1, 0.04, F
1, 0.04, O
1, 0.05, F
1, 0.05, F
1, 0.06, F
1, 0.06, O
1, 0.06, O
1, 0.06, F
1, 0.06, F
1, 0.07, F
1, 0.07, O
1, 0.07, F
1, 0.07, F
1, 0.07, O
1, 0.07, O
1, 0.08, F
1, 0.08, O
1, 0.08, F
1, 0.08, F
1, 0.08, F
1, 0.08, F
2, 0.0, O
2, 0.0, O
2, 0.0, O
2, 0.01, O
2, 0.01, O
...
```
**PostgreSQL**
```
jihoonson=# select l_partkey, l_tax, first_value(l_linestatus) over
(partition by l_partkey order by l_tax rows between 5 preceding and 8
following) from lineitem;
l_partkey | l_tax | first_value
-----------+-------+-------------
1 | 0 | O
1 | 0 | O
1 | 0.01 | O
1 | 0.01 | O
1 | 0.01 | O
1 | 0.02 | O
1 | 0.02 | F
1 | 0.02 | O
1 | 0.03 | F
1 | 0.03 | F
1 | 0.04 | F
1 | 0.04 | F
1 | 0.05 | O
1 | 0.05 | F
1 | 0.06 | F
1 | 0.06 | O
1 | 0.06 | O
1 | 0.06 | F
1 | 0.06 | F
1 | 0.07 | F
1 | 0.07 | F
1 | 0.07 | F
1 | 0.07 | O
1 | 0.07 | O
1 | 0.07 | O
1 | 0.08 | F
1 | 0.08 | O
1 | 0.08 | F
1 | 0.08 | F
1 | 0.08 | F
1 | 0.08 | O
2 | 0 | O
2 | 0 | O
2 | 0 | O
2 | 0.01 | O
2 | 0.01 | O
2 | 0.01 | O
2 | 0.02 | O
2 | 0.02 | O
2 | 0.02 | O
...
```
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