Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about how to use custom variables in Beeline. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

1. Purpose of document writing

When users use the hive and beeline commands to execute SQL, there is a need to dynamically specify parameters in the SQL statement. How can this be realized? This article Fayson focuses on how to use custom variables in Beeline. This article applies to the CDH5 version.

Test environment description

1.CM5.15.0 and CDH5.14.2

Use of 2.Beeline custom variables

When using Beeline (a new HiveServer2-based client) on CDH5.x, you need to use the passed variables displayed by the parameters (such as:-- hivevar key=value). The following Fayson illustrates with an example

1. Define a sql file with Hive execution statements in it

[root@cdh03 ~] # more test.sql

Select * from ${TBNAME} limit 10

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Here, the table name in the SQL statement is used as a dynamic parameter.

two。 Add a custom parameter to the beeline command line and execute it, passing the table name dynamically

[root@cdh03] # beeline-- hivevar TBNAME=ods_user-u "jdbc:hive2://cdh01.fayson.com:10000"-n testa-p '123 QAZ'-f test.sql

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This is how to use custom variables in Beeline shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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