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fix rules documentation

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jsteemann 2017-04-20 08:56:42 +02:00
parent 16a5db1c75
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Documentation/Books/AQL/ExecutionAndPerformance/Optimizer.mdpp
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@ -136,7 +136,7 @@ Here is the meaning of these rules in context of this query:
* `remove-unnecessary-calculations`: removes *CalculationNode*s whose result values are * `remove-unnecessary-calculations`: removes *CalculationNode*s whose result values are
not used in the query. In the example this happens due to the `remove-redundant-calculations` not used in the query. In the example this happens due to the `remove-redundant-calculations`
rule having made some calculations unnecessary. rule having made some calculations unnecessary.
* `use-index`: use an index to iterate over a collection instead of performing a * `use-indexes`: use an index to iterate over a collection instead of performing a
full collection scan. In the example case this makes sense, as the index can be full collection scan. In the example case this makes sense, as the index can be
used for filtering and sorting. used for filtering and sorting.
* `use-index-for-sort`: removes a `SORT` operation if it is already satisfied by * `use-index-for-sort`: removes a `SORT` operation if it is already satisfied by
@ -443,6 +443,7 @@ The following optimizer rules may appear in the `rules` attribute of a plan:
* `inline-subqueries`: will appear when a subquery was pulled out in its surrounding scope, * `inline-subqueries`: will appear when a subquery was pulled out in its surrounding scope,
e.g. `FOR x IN (FOR y IN collection FILTER y.value >= 5 RETURN y.test) RETURN x.a` e.g. `FOR x IN (FOR y IN collection FILTER y.value >= 5 RETURN y.test) RETURN x.a`
would become `FOR tmp IN collection FILTER tmp.value >= 5 LET x = tmp.test RETURN x.a` would become `FOR tmp IN collection FILTER tmp.value >= 5 LET x = tmp.test RETURN x.a`
* `geo-index-optimizer`: will appear when a geo index is utilized (MMFiles-specific)
The following optimizer rules may appear in the `rules` attribute of cluster plans: The following optimizer rules may appear in the `rules` attribute of cluster plans: