PostgresDB 23502: Not null violation

Occurs when a null value is inserted into a column with a NOT NULL constraint.
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What is

PostgresDB 23502: Not null violation

 ?

When encountering a 23502: Not null violation error in PostgreSQL, the recommended immediate action is to:

  1. Identify the table and column mentioned in the error message. The error typically specifies which table and column are involved.
  2. Examine the query that caused the error, focusing on the INSERT or UPDATE statement that was trying to modify the table. Look for any columns that were not provided with values in the query.
  3. Check the table schema for the column mentioned in the error to confirm it is set as NOT NULL. Use the following SQL command:
  4. SELECT column_name, data_type, is_nullable
    FROM information_schema.columns
    WHERE table_name = 'your_table_name' AND column_name = 'your_column_name';
  5. Replace your_table_name and your_column_name with the actual table and column names.
  6. Determine if your query missed providing a value for this column or provided a null value. If the column should not receive null values based on your application's data model, revise the query to include a non-null value for this column.
  7. If the column can be null based on your new requirements, consider altering the table schema to allow null values for this column. Execute the following command only if you are sure that allowing null values is appropriate:
  8. ALTER TABLE your_table_name ALTER COLUMN your_column_name DROP NOT NULL;
  9. Again, replace your_table_name and your_column_name with the correct values.
  10. If altering the column is not suitable and the error was due to a missing value in your query, modify your application logic or the specific query to ensure a valid non-null value is provided for the column.
  11. Rerun your corrected query.

These steps will help you resolve the 23502: Not null violation error by either adjusting your query to meet the not null constraint of the column or by altering the table schema to allow null values if that's suitable for your application logic.

Attached error: 
PostgresDB 23502: Not null violation
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