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Posted to dev@hive.apache.org by "BELUGA BEHR (JIRA)" <ji...@apache.org> on 2018/03/08 21:38:00 UTC
[jira] [Created] (HIVE-18913) Change DataType to Collection or Set
BELUGA BEHR created HIVE-18913:
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Summary: Change DataType to Collection or Set
Key: HIVE-18913
URL: https://issues.apache.org/jira/browse/HIVE-18913
Project: Hive
Issue Type: Improvement
Components: HiveServer2
Affects Versions: 3.0.0, 2.4.0
Reporter: BELUGA BEHR
https://github.com/apache/hive/blob/9b36ffa92cc4e0f47ea03d8d167debe743342f5b/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java
Please change the signature of these methods to be {{Set}} or {{Collection}}
{code}
public static List<String> getColumnNames*
{code}
Often these calls are being used to get a list of columns, then searched through. It would be more performant (and database set-theory correct) if the returned data type was a {{Set}} and not a {{List}}. And they should probably be immutable collections returned as well.
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