trait QueryPlan[DS <: GeoMesaDataStore[DS]] extends AnyRef
Plan for querying a GeoMesaDataStore
- DS
type of this data store
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abstract
type
Results
Type of raw results returned from the underlying database
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abstract
def
explain(explainer: Explainer, prefix: String = ""): Unit
Explains details on how this query plan will be executed
Explains details on how this query plan will be executed
- explainer
explainer to use for explanation
- prefix
prefix for explanation lines, used for nesting explanations
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abstract
def
filter: FilterStrategy
Reference back to the strategy
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abstract
def
maxFeatures: Option[Int]
Max features to return from the scan
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abstract
def
projection: Option[QueryReferenceSystems]
Geometry projection
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abstract
def
reducer: Option[FeatureReducer]
Optional reduce step for simple features coming back
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abstract
def
resultsToFeatures: ResultsToFeatures[Results]
Transform results coming back from a raw scan into features
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abstract
def
scan(ds: DS): CloseableIterator[Results]
Runs the query plan against the underlying database
Runs the query plan against the underlying database
- ds
data store - provides connection object and metadata
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abstract
def
sort: Option[Seq[(String, Boolean)]]
Sort fields and reverse order flags (true flips order to descending, false keeps order as ascending)
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