Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/454#discussion_r28209868
--- Diff:
tajo-algebra/src/main/java/org/apache/tajo/algebra/WindowSpec.java ---
@@ -128,12 +128,14 @@ public boolean equals(Object obj) {
public static enum WindowFrameStartBoundType {
UNBOUNDED_PRECEDING,
CURRENT_ROW,
- PRECEDING
+ PRECEDING,
+ FOLLOWING
}
--- End diff --
Right. I hope that you read a couple of comments in the thread of the link.
As I commented there, there is only one rule that the end bound cannot precede
the start bound. So, naturally, the start bound cannot be unbounded following.
I think that we can make some codes simpler with the unified bound type.
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