[jira] [Created] (HIVE-18055) cache like pattern object using map object in like function

[wan kun (JIRA)]

wan kun created HIVE-18055:
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             Summary: cache like pattern object using map object in like 
function
                 Key: HIVE-18055
                 URL: https://issues.apache.org/jira/browse/HIVE-18055
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: wan kun
            Assignee: wan kun
            Priority: Minor
             Fix For: 1.2.3


Now, only one pattern object was cached in the like function. If the like 
function is working on one column, the pattern object will be generated 
continuously for the regular expression matching. It's very inefficient. So 
should we use LRU MAP to cache a batch of objects ?



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