HPL/SQL is included to Apache Hive since version 2.0
HPL/SQL includes a Hive UDF function that allows you to execute HPL/SQL scripts (user-defined functions written in HPL/SQL language) in Hive queries.
For example, let's call the following function from a Hive query:
CREATE FUNCTION hello(text STRING) RETURNS STRING BEGIN RETURN 'Hello, ' || text || '!'; END;
Put this script to hplsqlrc file, then register HPL/SQL UDF in Hive as follows (set your path for jars and configuration files):
ADD JAR /home/pl/hplsql.jar; ADD JAR /home/pl/antlr-runtime-4.5.jar; ADD FILE /home/pl/hplsql-site.xml; ADD FILE /home/pl/hplsqlrc; CREATE TEMPORARY FUNCTION hplsql AS 'org.apache.hive.hplsql.Udf';
Now let's use hello function written in HPL/SQL language in Hive:
SELECT hplsql('hello(:1)', name) FROM users;
When you run HPL/SQL scripts using HPL/SQL CLI tool you can just use user-defined functions the same way as you use built-in functions:
SELECT hello(name) FROM users;
HPL/SQL CLI tool automatically puts referenced HPL/SQL user-defined functions and stored procedures to Distributed Cache, registers the Hive UDF and modifies the function call in the SQL statements.
For more information, see User-Defined Functions and Stored Procedures.
Version: HPL/SQL 0.3.1