Help Center/ MapReduce Service/ Component Operation Guide (LTS) (Paris Region)/ Using Hudi/ Hudi SQL Syntax Reference/ DML/ SET/RESET
Updated on 2022-12-14 GMT+08:00
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SET/RESET

Function

This command is used to dynamically add, update, display, or reset Hudi parameters without restarting the driver.

Syntax

  • Add or update a parameter value:

    SET parameter_name=parameter_value

    This command is used to add or update the value of parameter_name.

  • Display a parameter value:

    SET parameter_name

    This command is used to display the value of parameter_name.

  • Display session parameters:

    SET

    This command is used to display all supported session parameters.

  • Display session parameters along with usage details:

    SET -v

    This command is used to display all supported session parameters and their usage details.

  • Reset parameter values:

    RESET

    This command is used to reset all session parameters.

Parameter Description

Table 1 Parameters

Parameter

Description

parameter_name

Name of the parameter to be dynamically added, updated, or displayed.

parameter_value

New value to be set for parameter_name.

Precautions

The following table lists the properties to be used in the SET or RESET commands.

Table 2 Properties

Property

Description

hoodie.insert.shuffle.parallelism

Degree of parallelism (DOP) of Spark shuffle for writing data in insert mode.

hoodie.upsert.shuffle.parallelism

DOP of Spark shuffle for writing data in upsert mode.

hoodie.delete.shuffle.parallelism

DOP of Spark shuffle for deleting data in delete mode.

hoodie.sql.insert.mode

Insert mode. The value can be strict, non-strict, or upsert.

hoodie.sql.bulk.insert.enable

Whether to enable bulk insert.

spark.sql.hive.convertMetastoreParquet

Converts the parquet table into a data source table for reading. If the provider of Hudi is Hive and Spark SQL or Spark Beeline is used to read data, set this parameter to false.

Examples

  • Add or Update command: 
    set hoodie.insert.shuffle.parallelism = 100;
set hoodie.upsert.shuffle.parallelism = 100;
set hoodie.delete.shuffle.parallelism = 100;
  • Reset command: 
    RESET

System Response

  • You can view the success result in driver logs.
  • You can view the failure result on the UI.
Parent topic: DML