Resolving numeric overflow error in teradata: A Step-by-Step Guide

By / March 5, 2023

Teradata is one of the most popular DBMS and allows users to perform complex operations.
However, Teradata is known for being extremely resource-intensive and often causing errors.
One such issue is being flagged as numeric overflow error, which can occur due to a variety of reasons.
In this article, we will explore some of the possible reasons for numeric overflow error and troubleshooting tips to help you resolve this error.

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    Modify your numeric data type

    1. In Teradata, all numeric data types except DECIMAL(-8) are signed. Numeric data in the Teradata database cannot exceed the maximum value of the signed data type.
    2. To avoid numeric overflow error, you should limit the maximum value of numeric data types used in Teradata database.
      To avoid numeric overflow error, you should limit the maximum value of numeric data types used in Teradata database.
    3. You can modify your data type in Teradata database by executing the following commands:
    4. SQL> EXECUTE DBMS_DATA_MINING.SET_DATA_TYPE(‘numeric_type’, ‘numeric_type_value’)

    Use Teradata’s default numeric data type

    1. The column and data type can be changed in the Teradata SQL Developer.
    2. Click on your schema name in the left-hand pane of the SQL Developer tool.
      Click on your schema name in the left-hand pane of the SQL Developer tool.
    3. Right-click on the schema name and select Properties.
    4. Go to SQL and select Defaults tab.
    5. Change the Numeric data type to Default from Long Integer.

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    • Modify the SQL Statement

    1. If the numeric value exceeds the maximum allowed data type size, Teradata may return an overflow error.
    2. To resolve numeric overflow error, increase the maximum allowed size for the numeric data type.
      To resolve numeric overflow error, increase the maximum allowed size for the numeric data type.
    3. Open the Teradata Studio.
    4. In the Teradata Studio, navigate to the Teradata Studio project folder.
    5. Right-click on the Teradata Studio project file and select Open.
    6. Locate the sql_statements.sql file and open the same.
      Locate the sql_statements.sql file and open the same.
    7. Change the maximum numeric data type size in the sql_statements.sql file to 8.0.
    8. Save the changes and exit the Teradata Studio.
    9. Restart the Teradata Server.
    10. Verify the numeric overflow error is resolved.
      Verify the numeric overflow error is resolved.

    Check the cardinality

    1. Cardinality refers to the number of attributes or columns in a table. Teradata has a predefined upper limit for the number of columns in a table.
      Cardinality refers to the number of attributes or columns in a table. Teradata has a predefined upper limit for the number of columns in a table.
    2. If the numeric data type has more than one column, then change the data type or remove the unnecessary columns.
    3. Change your data type
      If the numeric data type is getting truncated, then change the data type of that column from numeric to character data type.
    4. Note: Sequential data type is not supported in Teradata.

    Modify the query

    1. Check if the query has syntax error.
      Check if the query has syntax error.
    2. Check all the parameters in the query.
    3. If the query is a table, try to add multiple columns.
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    Check if the Teradata server is running

    1. Check if the Teradata server is running by opening up the Teradata Database Studio.
    2. If Teradata is not running, start the server.
      If Teradata is not running, start the server.
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