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HPL/SQL is included to Apache Hive since version 2.0

lower

LOWER Function - PL/HQL Reference

LOWER function converts a string expression to lower case.

Syntax:

LOWER(expression); 

Return Data Type:

STRING

Example:

Convert a string to lower case:

LOWER('ABC');
---
abc

Compatibility: Oracle, Microsoft SQL Server, IBM DB2, Teradata, PostgreSQL, MySQL and Netezza

Version: PL/HQL 0.03