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https://issues.apache.org/jira/browse/ASTERIXDB-1779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848741#comment-15848741
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Taewoo Kim commented on ASTERIXDB-1779:
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[~tillw]: Actually, my example is wrong. I need to switch the order in the
example. My point is that whatever order that a user specifies predicates, the
optimizer needs to reorder them by increasing evaluation cost. I am not sure we
have this logic in the current code. Let me check.
{code}
for $i in dataset MyData
where edit-distance($i.name, "Arnold") < 2 and $i.id < 5
return $i;
{code}
> Processing the certain function predicates after a simple predicates
> --------------------------------------------------------------------
>
> Key: ASTERIXDB-1779
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1779
> Project: Apache AsterixDB
> Issue Type: Improvement
> Reporter: Taewoo Kim
>
> For example, if we have the following AQL query,
> {code}
> for $i in dataset MyData
> where $i.id < 5 and edit-distance($i.name, "Arnold") < 2
> return $i;
> {code}
> It may be better to process *$i.id < 5* predicate first and then process
> *edit-distance($i.name, "Arnold")* predicate since the processing cost of the
> latter is higher than that of the former.
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