Why Does the "--hivevar" Option I Specified in the Command for Starting spark-beeline Fail to Take Effect?

Question

Why does the --hivevar option I specified in the command for starting spark-beeline fail to take effect?

In the V100R002C60 version, if I use the --hivevar <VAR_NAME>=<var_value> option to define a variable in the command for starting spark-beeline, no error is reported in spark-beeline. However, if the variable <VAR_NAME> is used in SQL, the variable cannot be parsed and the <VAR_NAME> exception is reported.

For example:

  1. Run the following command to start the spark-beeline:

    spark-beeline --hivevar <VAR_NAME>=<var_value>

  1. After spark-beeline is started successfully, I run the SQL statements DROP TABLE ${VAR_NAME} in spark-beeline. The VAR_NAME exception occurs.

Answer

In the V100R002C60 version, the --hivevar <VAR_NAME>=<var_value> feature of Hive is not supported in Spark because multi-session management function is added. Therefore, the --hivevar option in the command for starting spark-beeline is invalid.

Parent topic: Spark SQL and DataFrame