If you’ve noticed some missing columns or data from your data warehouse, the root cause may be NULL values.
Stitch Replication
When Stitch loads your data, it uses the column’s data type to determine how to correctly store the data in your data warehouse. If a column only contains NULLs, Stitch’s loading processes won’t be able to infer the correct data type to store the data properly.
In short: when a column only contains NULLs, it won’t be replicated to your data warehouse.
Next Steps
If you notice some missing columns, we recommend checking to see if they contain only NULLs. If this is the case, should that column at any point contain non-NULL values in the future, the column will immediately be created in your data warehouse and populated with the non-NULL values.
Contacting Support
If you check the columns and find they contain values that are non-null, please reach out to support.
Questions? Feedback?
Did this article help? If you have questions or feedback, feel free to submit a pull request with your suggestions, open an issue on GitHub, or reach out to us.