Package org.apache.druid.segment
Class RowBasedCursorFactory<RowType>
- java.lang.Object
-
- org.apache.druid.segment.RowBasedCursorFactory<RowType>
-
- All Implemented Interfaces:
Expr.InputBindingInspector,ColumnInspector,CursorFactory
public class RowBasedCursorFactory<RowType> extends Object implements CursorFactory
-
-
Constructor Summary
Constructors Constructor Description RowBasedCursorFactory(Sequence<RowType> rowSequence, RowAdapter<RowType> rowAdapter, RowSignature rowSignature)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ColumnCapabilitiesgetColumnCapabilities(String column)Returns capabilities of a particular column, if known.RowSignaturegetRowSignature()Returns theRowSignatureof the data available from this cursor factory.CursorHoldermakeCursorHolder(CursorBuildSpec spec)-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
-
Methods inherited from interface org.apache.druid.segment.ColumnInspector
getType
-
Methods inherited from interface org.apache.druid.math.expr.Expr.InputBindingInspector
areNumeric, areNumeric, areSameTypes, areSameTypes, areScalar, areScalar, canVectorize, canVectorize
-
-
-
-
Constructor Detail
-
RowBasedCursorFactory
public RowBasedCursorFactory(Sequence<RowType> rowSequence, RowAdapter<RowType> rowAdapter, RowSignature rowSignature)
-
-
Method Detail
-
makeCursorHolder
public CursorHolder makeCursorHolder(CursorBuildSpec spec)
- Specified by:
makeCursorHolderin interfaceCursorFactory
-
getRowSignature
public RowSignature getRowSignature()
Description copied from interface:CursorFactoryReturns theRowSignatureof the data available from this cursor factory. For mutable segments, even though the signature may evolve over time, any particular object returned by this method is an immutable snapshot.- Specified by:
getRowSignaturein interfaceCursorFactory
-
getColumnCapabilities
@Nullable public ColumnCapabilities getColumnCapabilities(String column)
Description copied from interface:CursorFactoryReturns capabilities of a particular column, if known. May be null if the column doesn't exist, or if the column does exist but the capabilities are unknown. The latter is possible with dynamically discovered columns. Note that CursorFactory are representations of "real" segments, so they are not aware of any virtual columns that may be involved in a query. In general, query engines should instead use the methodColumnSelectorFactory.getColumnCapabilities(String), which returns capabilities for virtual columns as well.- Specified by:
getColumnCapabilitiesin interfaceColumnInspector- Specified by:
getColumnCapabilitiesin interfaceCursorFactory- Parameters:
column- column name- Returns:
- capabilities, or null
-
-