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
- 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.
- To avoid numeric overflow error, you should limit the maximum value of numeric data types used in Teradata database.
- You can modify your data type in Teradata database by executing the following commands:
- SQL> EXECUTE DBMS_DATA_MINING.SET_DATA_TYPE(‘numeric_type’, ‘numeric_type_value’)
Use Teradata’s default numeric data type
- The column and data type can be changed in the Teradata SQL Developer.
- Click on your schema name in the left-hand pane of the SQL Developer tool.
- Right-click on the schema name and select Properties.
- Go to SQL and select Defaults tab.
- Change the Numeric data type to Default from Long Integer.
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Modify the SQL Statement
- If the numeric value exceeds the maximum allowed data type size, Teradata may return an overflow error.
- To resolve numeric overflow error, increase the maximum allowed size for the numeric data type.
- Open the Teradata Studio.
- In the Teradata Studio, navigate to the Teradata Studio project folder.
- Right-click on the Teradata Studio project file and select Open.
- Locate the sql_statements.sql file and open the same.
- Change the maximum numeric data type size in the sql_statements.sql file to 8.0.
- Save the changes and exit the Teradata Studio.
- Restart the Teradata Server.
- Verify the numeric overflow error is resolved.
Check the cardinality
- 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.
- If the numeric data type has more than one column, then change the data type or remove the unnecessary columns.
- 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. - Note: Sequential data type is not supported in Teradata.
Modify the query
- Check if the query has syntax error.
- Check all the parameters in the query.
- If the query is a table, try to add multiple columns.
Check if the Teradata server is running
- Check if the Teradata server is running by opening up the Teradata Database Studio.
- If Teradata is not running, start the server.
