Help Center/ MapReduce Service/ User Guide (Kuala Lumpur Region)/ MRS Cluster Component Operation Gudie/ Using CarbonData (for MRS 3.x or Later)/ CarbonData Syntax Reference/ DML/ DELETE RECORDS from CARBON TABLE
Updated on 2024-03-18 GMT+08:00
View PDF
Share

DELETE RECORDS from CARBON TABLE

Function

This command is used to delete records from a CarbonData table.

Syntax

DELETE FROM CARBON_TABLE [WHERE expression];

Parameter Description

Table 1 DELETE RECORDS parameters

Parameter

Description

CARBON TABLE

Name of the CarbonData table in which the DELETE operation is performed

Precautions

  • If a segment is deleted, all secondary indexes associated with the segment are deleted as well.
  • If the carbon.input.segments property has been set for the queried table, the DELETE operation fails. To solve this problem, run the following statement before the query:

    Syntax:

    SET carbon.input.segments. <database_name>.<table_name>=*;

Examples

  • Example 1:

    delete from columncarbonTable1 d where d.column1 = 'country';

  • Example 2:

    delete from dest where column1 IN ('country1', 'country2');

  • Example 3:

    delete from columncarbonTable1 where column1 IN (select column11 from sourceTable2);

  • Example 4:

    delete from columncarbonTable1 where column1 IN (select column11 from sourceTable2 where column1 = '***');

  • Example 5:

    delete from columncarbonTable1 where column2 >= 4;

System Response

Success or failure will be recorded in the driver log and on the client.

Parent topic: DML