Additional Notes
What signifies inefficient index usage in an execution plan?
Track: Java
Topic: SQL for Java Devs
Focus: Indexes
Java: Indexes
Answer
Full table scans despite available indexes indicate inefficiency.
If a query execution plan shows full table scans where indexes exist, it suggests the indexes aren't helping. This might be due to poor query design or inappropriate indexing strategy. For example, using `EXPLAIN` might reveal a full scan in `SELECT * FROM orders WHERE customer_id = 123` if the 'customer_id' index isn't used.
If a query execution plan shows full table scans where indexes exist, it suggests the indexes aren't helping. This might be due to poor query design or inappropriate indexing strategy. For example, using `EXPLAIN` might reveal a full scan in `SELECT * FROM orders WHERE customer_id = 123` if the 'customer_id' index isn't used.
Topics: Indexes Java SQL for Java Devs