ANALYZE TABLE <table_name> COMPUTE STATISTICS- Data loading

[Sainath368]

Hi, I want some clarification regarding running ANALYZE TABLE <table_name> COMPUTE STATISTICS. Can anyone please help me understand if this command will throw errors or cause issues while data is loading into the table at the time of execution? Any insights or advice would be appreciated. Thanks!

[szymon_dybczak]

Hi @Sainath368 ,

 You can safely run ANALYZE command! Here is a detailed explanation:

Concurrency Between ANALYZE TABLE and Write/Update Operations

1. Delta Lake’s ACID Transactions

Delta Lake provides ACID (Atomicity, Consistency, Isolation, Durability) transactions. This ensures that all operations on Delta tables are transactionally safe and isolated from one another.

2. ANALYZE TABLE Operation

ANALYZE TABLE is a read-only operation. It reads the data to compute statistics but does not modify the data.

Consistent Snapshot: It operates on a consistent snapshot of the data at the time the command is executed. This means it will not include data from ongoing write or update operations that haven't been committed yet.

3. Impact on Write/Update Operations

No Interference: Since ANALYZE TABLE is read-only and operates on a consistent snapshot, it does not interfere with ongoing write or update operations on the Delta table.

Concurrency Support: Multiple read operations (like ANALYZE TABLE) and write operations can safely run concurrently without causing conflicts or data corruption.

Hope it helps!