Package org.apache.calcite.rel.metadata

Class BuiltInMetadata

java.lang.Object

org.apache.calcite.rel.metadata.BuiltInMetadata

public abstract class BuiltInMetadata
extends Object

Contains the interfaces for several common forms of metadata.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	BuiltInMetadata.AllPredicates	Metadata about the predicates that hold in the rows emitted from a relational expression.
static interface	BuiltInMetadata.Collation	Metadata about which columns are sorted.
static interface	BuiltInMetadata.ColumnOrigin	Metadata about the origins of columns.
static interface	BuiltInMetadata.ColumnUniqueness	Metadata about whether a set of columns uniquely identifies a row.
static interface	BuiltInMetadata.CumulativeCost	Metadata about the cost of evaluating a relational expression, including all of its inputs.
static interface	BuiltInMetadata.DistinctRowCount	Metadata about the number of distinct rows returned by a set of columns in a relational expression.
static interface	BuiltInMetadata.Distribution	Metadata about how a relational expression is distributed.
static interface	BuiltInMetadata.ExplainVisibility	Metadata about whether a relational expression should appear in a plan.
static interface	BuiltInMetadata.ExpressionLineage	Metadata about the origins of expressions.
static interface	BuiltInMetadata.LowerBoundCost	Metadata to get the lower bound cost of a RelNode.
static interface	BuiltInMetadata.MaxRowCount	Metadata about the maximum number of rows returned by a relational expression.
static interface	BuiltInMetadata.Measure	Metadata about whether a column is a measure and, if so, what is the expression to evaluate that measure in the current context.
static interface	BuiltInMetadata.Memory	Metadata about the memory use of an operator.
static interface	BuiltInMetadata.MinRowCount	Metadata about the minimum number of rows returned by a relational expression.
static interface	BuiltInMetadata.NodeTypes	Metadata about the node types in a relational expression.
static interface	BuiltInMetadata.NonCumulativeCost	Metadata about the cost of evaluating a relational expression, not including its inputs.
static interface	BuiltInMetadata.Parallelism	Metadata about the degree of parallelism of a relational expression, and how its operators are assigned to processes with independent resource pools.
static interface	BuiltInMetadata.PercentageOriginalRows	Metadata about the proportion of original rows that remain in a relational expression.
static interface	BuiltInMetadata.PopulationSize	Metadata about the number of distinct values in the original source of a column or set of columns.
static interface	BuiltInMetadata.Predicates	Metadata about the predicates that hold in the rows emitted from a relational expression.
static interface	BuiltInMetadata.RowCount	Metadata about the number of rows returned by a relational expression.
static interface	BuiltInMetadata.Selectivity	Metadata about the selectivity of a predicate.
static interface	BuiltInMetadata.Size	Metadata about the size of rows and columns.
static interface	BuiltInMetadata.TableReferences	Metadata to obtain references to tables used by a given expression.
static interface	BuiltInMetadata.UniqueKeys	Metadata about which combinations of columns are unique identifiers.

Constructor Summary

Constructors

Constructor	Description
BuiltInMetadata()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BuiltInMetadata

public BuiltInMetadata()