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https://issues.apache.org/jira/browse/HIVE-20847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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BELUGA BEHR updated HIVE-20847:
-------------------------------
Status: Patch Available (was: Open)
> Review of NullScan Code
> -----------------------
>
> Key: HIVE-20847
> URL: https://issues.apache.org/jira/browse/HIVE-20847
> Project: Hive
> Issue Type: Improvement
> Components: Physical Optimizer
> Affects Versions: 4.0.0, 3.2.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Minor
> Attachments: HIVE-20847.1.patch, HIVE-20847.1.patch,
> HIVE-20847.1.patch, HIVE-20847.2.patch, HIVE-20847.3.patch, HIVE-20847.4.patch
>
>
> What got me looking at this class was the verboseness of some of the logging.
> I would like to request that we DEBUG the logging since this level of detail
> means nothing to a cluster admin.
> Also... this {{contains}} call would be better applied onto a {{HashSet}}
> instead of an {{ArrayList}}.
> {code:java|title=NullScanTaskDispatcher.java}
> private void processAlias(MapWork work, Path path, ArrayList<String>
> aliasesAffected, ArrayList<String> aliases) {
> // the aliases that are allowed to map to a null scan.
> ArrayList<String> allowed = new ArrayList<String>();
> for (String alias : aliasesAffected) {
> if (aliases.contains(alias)) {
> allowed.add(alias);
> }
> }
> {code}
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