What Is CTE (Common Table Expression)?
CTEs are temporary named result sets defined using the WITH clause. They make complex queries easier to read and support recursion in PostgreSQL.
Why It Matters for PostgreSQL Performance
In PostgreSQL performance work, CTE (Common Table Expression) affects throughput, latency, or operational reliability depending on workload and configuration.
Practical Benchmarking Context
When benchmarking with pgbench, track how CTE (Common Table Expression) changes behavior across scale factor, client concurrency, and storage conditions.
Use this term together with workload shape, concurrency level, and scale factor when interpreting pgbench outputs. Isolated values can be misleading without full run context.
Example
Usage: WITH sales_total AS (...) SELECT * FROM sales_total;