The following example will cause the IDL compiler to generate C++ code which fails to compile
enums:
QueryPlanRankerMode:
type: string
values:
kAutomaticCE: "automaticCE"
kHistogramCE: "histogramCE"
kSamplingCE: "samplingCE"
kMultiPlanning: "multiPlanning"
server_parameters:
planRankerMode:
description: "Enable cost-based ranking of query plans."
set_at: [ startup, runtime ]
cpp_varname: planRankerMode
cpp_vartype: synchronized_value<QueryPlanRankerModeEnum>
default:
expr: QueryPlanRankerModeEnum::kAutomaticCE
redact: false
The current workaround is to generate the server parameter as a cpp_class, implement an append and setFromString function and access it at runtime using ServerParameterSet::getNodeParameterSet().
This feature request will improve the usable of IDL. I've run into two cases in the past month where this would be useful.
- is depended on by
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SERVER-93315 Delete src/mongo/db/query/framework_control.cpp
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- Blocked
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SERVER-96802 Update server param types of IDL Enum to use new IDL syntax
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- Open
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