Make case-insensitive substring search as fast as case-sensitive variant
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Key: HIVE-1747
URL: https://issues.apache.org/jira/browse/HIVE-1747
Project: Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.7.0
Reporter: John Sichi
WHERE str_col like '%XYZ%'
is very fast because the pattern matching code is special-cased. However,
WHERE str_col rlike '(?i)%XYZ%'
is very slow because it goes through the generic Java pattern matching.
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