Package org.apache.calcite.plan.volcano
Class VolcanoRelMetadataProvider
java.lang.Object
org.apache.calcite.plan.volcano.VolcanoRelMetadataProvider
- All Implemented Interfaces:
RelMetadataProvider
Deprecated.
VolcanoRelMetadataProvider implements the
RelMetadataProvider
interface by combining metadata from the rels making up an equivalence class.-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescription<@Nullable M extends @Nullable Metadata>
@Nullable UnboundMetadata<M>Deprecated.boolean
Deprecated.List<MetadataHandler<?>>
handlers
(Class<? extends MetadataHandler<?>> handlerClass) Deprecated.Retrieves a list ofMetadataHandler
for implements a particularMetadataHandler
.class.<M extends Metadata>
com.google.common.collect.Multimap<Method,MetadataHandler<M>> handlers
(MetadataDef<M> def) Deprecated.int
hashCode()
Deprecated.
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Constructor Details
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VolcanoRelMetadataProvider
public VolcanoRelMetadataProvider()Deprecated.
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Method Details
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equals
Deprecated. -
hashCode
public int hashCode()Deprecated. -
apply
@Deprecated public <@Nullable M extends @Nullable Metadata> @Nullable UnboundMetadata<M> apply(Class<? extends RelNode> relClass, Class<? extends @Nullable M> metadataClass) Deprecated.Description copied from interface:RelMetadataProvider
Retrieves metadata of a particular type and for a particular sub-class of relational expression.The object returned is a function. It can be applied to a relational expression of the given type to create a metadata object.
For example, you might call
RelMetadataProvider provider; LogicalFilter filter; RexNode predicate; Function<RelNode, Metadata> function = provider.apply(LogicalFilter.class, Selectivity.class}; Selectivity selectivity = function.apply(filter); Double d = selectivity.selectivity(predicate);
- Specified by:
apply
in interfaceRelMetadataProvider
- Parameters:
relClass
- Type of relational expressionmetadataClass
- Type of metadata- Returns:
- Function that will field a metadata instance; or null if this provider cannot supply metadata of this type
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handlers
@Deprecated public <M extends Metadata> com.google.common.collect.Multimap<Method,MetadataHandler<M>> handlers(MetadataDef<M> def) Deprecated.- Specified by:
handlers
in interfaceRelMetadataProvider
-
handlers
Deprecated.Description copied from interface:RelMetadataProvider
Retrieves a list ofMetadataHandler
for implements a particularMetadataHandler
.class. The resolution order is specificity of the relNode class, with preference given to handlers that occur earlier in the list. For instance, given a return list of {A, B, C} where A implements RelNode and Scan, B implements Scan, and C implements LogicalScan and Filter. Scan dispatches to a.method(Scan) LogicalFilter dispatches to c.method(Filter). LogicalScan dispatches to c.method(LogicalScan). Aggregate dispatches to a.method(RelNode). The behavior is undefined if the class hierarchy for dispatching is not a tree.- Specified by:
handlers
in interfaceRelMetadataProvider
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