Cross check between enabled optimizations and triggered optimizations
Bug #854548 reported by
Philip Stoev
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Random Query Generator |
New
|
Undecided
|
Unassigned | ||
Bug Description
The following two "silent" scenarios are possible:
- an optimization transformation is disabled in DisableChosenPlan, and is therefore not tested at all.
- an optimization transformation is enabled in DisableChosenPlan, but is not exercised by the particular grammar or combination of optimizer switches;
A partial solution to the second one would be to print out a warning if there were transformations in DisableChosenPlan that were not triggered by any incoming qurey.
The solution for the first would be to fail the test if most queries passed through DisableChosenPlan without modification, as visible in EXPLAIN.
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