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I need to create a hive.hql as follows.
HIVE.hql:
select * from tabel1;
select * from table2;
My question is: can i echo any message to my console like " results from table1 is obtained " in the hql code after table one is created like
select * from tabel1;
echo/print/output ("table 1 results obtained");
select * from table2;
667
Just give the path to your directory. The correct method is shown below. $ insert overwrite directory '/home/output' select books from table; Also, note that the insert overwrites directory basically removes all the existing files under the specified folder and then create data files as part files.
HQL or Hive Query Language is a simple yet powerful SQL like querying language which provides the users with the ability to perform data analytics on big datasets.
Hive queries are written in HiveQL, which is a query language similar to SQL. Hive allows you to project structure on largely unstructured data. After you define the structure, you can use HiveQL to query the data without knowledge of Java or MapReduce.
What is HQL? Hive defines a simple SQL-like query language to querying and managing large datasets called Hive-QL ( HQL ). It's easy to use if you're familiar with SQL Language. Hive allows programmers who are familiar with the language to write the custom MapReduce framework to perform more sophisticated analysis.
In the *.hql file insert a line as below in between the two hive queries.
!echo "table 1 results obtained";
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