POST_START

Investigating a Row Filter That Hides Expected Production Records

I recently encountered an issue where some expected production records were missing from our financial transactions table. My task was to investigate why these records weren’t showing up, even though they should have been in the dataset. I started by checking the table structure to understand what metadata might be affecting the visibility of the records.

Checking the Table Structure

I ran the DESCRIBE TABLE EXTENDED command to get detailed information about the production.finance.transactions table. This helps me understand the schema and any metadata that might be influencing how data is filtered or displayed.

DESCRIBE TABLE EXTENDED production.finance.transactions;

I saw a representative result like this:

col_name | data_type | comment
customer_id | bigint | customer identifier
customer_name | string | customer display name
region | string | sales region

From this, I learned that the table includes fields like customer_id, customer_name, and region. However, there was no immediate indication of a filter or a column that might be causing the records to be hidden. I decided to look at the data itself to see if there were any patterns or anomalies.

Examining the Data

To get a sense of the data, I ran a SELECT query to retrieve the first 100 rows from the production.finance.transactions table. This would help me identify any patterns or missing records that might be related to the issue I was investigating.

SELECT * FROM production.finance.transactions LIMIT 100;

I saw a representative result like this:

customer_id | customer_name | region | status
1001 | Maria Keller | EU | ACTIVE
1002 | Daniel Smith | US | ACTIVE
1003 | Sofia Rossi | EU | INACTIVE

At first glance, the data seemed normal. However, I noticed that some records I expected to see were missing. I decided to double-check the user context to ensure I was looking at the right dataset and permissions.

Verifying the Current User

To make sure I wasn’t missing something related to access control, I ran the SELECT current_user() command to confirm my identity and permissions within the system.

SELECT current_user();

I saw a representative result like this:

current_user()
analyst@demo.com

This confirmed that I was logged in as analyst@demo.com, and there were no immediate signs of restricted access. I realized that the issue might be related to a row filter or a query condition that wasn’t being applied correctly.

Next Steps

With the table structure and data examined, I now have a clearer idea of what might be causing the missing records. I will continue to explore the query conditions, metadata, and possibly data lineage to uncover why these expected records are not appearing in the results.