Help Center/ MapReduce Service/ User Guide (Kuala Lumpur Region)/ MRS Cluster Component Operation Gudie/ Using CarbonData (for MRS 3.x or Later)/ CarbonData FAQ/ Why Does INSERT INTO CARBON TABLE Command Fail?
Updated on 2022-08-12 GMT+08:00
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Why Does INSERT INTO CARBON TABLE Command Fail?

Question

Why does the INSERT INTO CARBON TABLE command fail and the following error message is displayed?

Data load failed due to bad record

Answer

The INSERT INTO CARBON TABLE command fails in the following scenarios:

  • If the data type of source and target table columns are not the same, the data from the source table will be treated as bad records and the INSERT INTO command fails.
  • If the result of aggregation function on a source column exceeds the maximum range of the target column, then the INSERT INTO command fails.

    Solution:

    You can use the cast function on corresponding columns when inserting records.

    For example:

    1. Run the DESCRIBE command to query the target and source table.

      DESCRIBE newcarbontable;

      Result:

      col1 int
col2 bigint

      DESCRIBE sourcetable;

      Result:

      col1 int
col2 int
    2. Add the cast function to convert bigint value to integer.

      INSERT INTO newcarbontable select col1, cast(col2 as integer) from sourcetable;

Parent topic: CarbonData FAQ