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https://issues.apache.org/jira/browse/TAJO-1436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14386336#comment-14386336
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ASF GitHub Bot commented on TAJO-1436:
--------------------------------------
Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/456#discussion_r27371479
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/planner/physical/SeqScanExec.java
---
@@ -197,6 +206,9 @@ public Tuple next() throws IOException {
if (fragments == null) {
return null;
}
+ if (scanner == null) {
+ System.out.println("[SeqScanExec/next] ");
--- End diff --
Please remove debug codes.
> Add Bind method to EvalNode
> ---------------------------
>
> Key: TAJO-1436
> URL: https://issues.apache.org/jira/browse/TAJO-1436
> Project: Tajo
> Issue Type: Improvement
> Components: operator/expression
> Reporter: Hyunsik Choi
> Assignee: Navis
> Fix For: 0.11.0
>
>
> EvalNode just has eval() method to evaluate some tuples. It does not have any
> method to prepare actual execution.
> For example, FieldEval should know an actual field index of an input tuple.
> This process is also performed in eval() method.
> It has some problems:
> * eval() method should involve two works, and it does different behavior
> with some flag or null check.
> * 'if condition' in eval() method for different behaviors involves
> unnecessary branches, causing performance degradation.
> So, we should add {{bind(Schema)}} method to EvalNode and then move some
> preparation code from eval() to bind(Schame) method.
> Also, we should refactor the signature {{eval(Schema, Tuple)}} to
> {{eval(Tuple)}}.
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