[
https://issues.apache.org/jira/browse/HIVE-18487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gopal V updated HIVE-18487:
---------------------------
Affects Version/s: 3.0.0
> Vectorization: Undecoded utf-8 fast-path for _ wildcards in LIKE
> ----------------------------------------------------------------
>
> Key: HIVE-18487
> URL: https://issues.apache.org/jira/browse/HIVE-18487
> Project: Hive
> Issue Type: Improvement
> Affects Versions: 3.0.0
> Reporter: Gopal V
> Priority: Major
>
> Queries with "%" are optimized using the BoyerMooreHorspool lookups, while
> the simpler single char wildcard "_" isn't optimized to be faster.
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/AbstractFilterStringColLikeStringScalar.java]
> Has Begin, End, Middle and Chained checkers for "%", but no option to handle
> "_" in the chained mode.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
