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https://issues.apache.org/jira/browse/DRILL-1681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14226200#comment-14226200
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Jim Bates commented on DRILL-1681:
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What is "large numbers of files"? 1000? 100,000?
> select with limit on directory with csv files takes quite long to terminate
> ---------------------------------------------------------------------------
>
> Key: DRILL-1681
> URL: https://issues.apache.org/jira/browse/DRILL-1681
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Flow
> Reporter: Suresh Ollala
> Fix For: Future
>
>
> query like select * from `/drill/data` limit 100 takes quite long to
> terminate, about 20+ seconds.
> /drill/data includes overall 1100 csv files, all in single directory.
> select * from `/drill/data/d2.csv` limit 100; terminates in 0.2 seconds.
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