org.apache.flink.table.planner.plan.metadata

Interface FlinkMetadata.FilteredColumnInterval

All Superinterfaces:

org.apache.calcite.rel.metadata.Metadata

Enclosing class:

FlinkMetadata

public static interface FlinkMetadata.FilteredColumnInterval
extends org.apache.calcite.rel.metadata.Metadata

Metadata about the interval of given column under the given filter argument from a specified relational expression.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	FlinkMetadata.FilteredColumnInterval.Handler Handler API.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.calcite.rel.metadata.MetadataDef<FlinkMetadata.FilteredColumnInterval>	DEF
static Method	METHOD

Method Summary

Modifier and Type	Method and Description
ValueInterval	getFilteredColumnInterval(int columnIndex, int filterArg) Returns the interval value of the given column under the given filter argument from a specified relational expression.

Methods inherited from interface org.apache.calcite.rel.metadata.Metadata

rel

Field Detail

METHOD

static final Method METHOD

DEF

static final org.apache.calcite.rel.metadata.MetadataDef<FlinkMetadata.FilteredColumnInterval> DEF

Method Detail

getFilteredColumnInterval

ValueInterval getFilteredColumnInterval(int columnIndex,
                                        int filterArg)

Returns the interval value of the given column under the given filter argument from a specified relational expression.

Parameters:

columnIndex - the index of the given column in a specified relational expression

filterArg - the index of the filter argument, -1 when no filter argument existed

Returns:

the interval of the given column. Returns null if interval cannot be estimated, Returns [[NullValueInterval]] if column values does not contains any value except for null.