On 1/11/19 8:10 PM, Robert Haas wrote:
> WITH cte_name [[NOT] MATERIALIZED] AS (query) main_query...
Hm, when would one want "NOT MATERIALIZED"? I am not sure I see the
usefulness of forcing inlining other than if we by default do not inline
when a CTE is referenced multiple times.
Do you imaging it working something like the below?
1. Default
# Not inlined
- Referenced multiple times
- Includes FOR UPDATE|SHARE
- Includes volatile functions
- Recurisve
- DML
# Inlined
- Simple case (no side effects, referenced once)
2. MATERIALIZED
# Not inlined
- Everything
# Inlined
- (none)
3. NOT MATERIALIZED
# Not inlined
- Recursive
- DML
# Inlined
- Everything else
Andreas
