Package org.apache.calcite.plan

Class VisitorDataContext

java.lang.Object

org.apache.calcite.plan.VisitorDataContext

All Implemented Interfaces:

DataContext

public class VisitorDataContext
extends Object
implements DataContext

DataContext for evaluating a RexExpression.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.DataContext

DataContext.Variable

Field Summary

Fields inherited from interface org.apache.calcite.DataContext

ROOT

Constructor Summary

Constructors

Constructor	Description
VisitorDataContext(@Nullable Object[] values)

Method Summary

Modifier and Type	Method	Description
@Nullable Object	get(String name)	Returns a context variable.
QueryProvider	getQueryProvider()	Returns the query provider.
SchemaPlus	getRootSchema()	Returns a sub-schema with a given name, or null.
JavaTypeFactory	getTypeFactory()	Returns the type factory.
static @Nullable Pair<Integer,? extends @Nullable Object>	getValue(@Nullable RexNode inputRef, @Nullable RexNode literal)
static @Nullable DataContext	of(RelNode targetRel, LogicalFilter queryRel)
static @Nullable DataContext	of(RelDataType rowType, List<? extends Pair<RexInputRef,? extends @Nullable RexNode>> usageList)
static @Nullable DataContext	of(RelDataType rowType, RexNode rex)

Methods inherited from class java.lang.Object

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

Constructor Details

VisitorDataContext

public VisitorDataContext(@Nullable Object[] values)

Method Details

getRootSchema

public SchemaPlus getRootSchema()

Description copied from interface: DataContext

Returns a sub-schema with a given name, or null.

Specified by:

getRootSchema in interface DataContext

getTypeFactory

public JavaTypeFactory getTypeFactory()

Description copied from interface: DataContext

Returns the type factory.

Specified by:

getTypeFactory in interface DataContext

getQueryProvider

public QueryProvider getQueryProvider()

Description copied from interface: DataContext

Returns the query provider.

Specified by:

getQueryProvider in interface DataContext

get

public @Nullable Object get(String name)

Description copied from interface: DataContext

Returns a context variable.

Supported variables include: "sparkContext", "currentTimestamp", "localTimestamp".

Specified by:

get in interface DataContext

Parameters:

name - Name of variable

of

public static @Nullable DataContext of(RelNode targetRel,
 LogicalFilter queryRel)

of

public static @Nullable DataContext of(RelDataType rowType,
 RexNode rex)

of

public static @Nullable DataContext of(RelDataType rowType,
 List<? extends Pair<RexInputRef,? extends @Nullable RexNode>> usageList)

getValue

public static @Nullable Pair<Integer,? extends @Nullable Object> getValue(@Nullable RexNode inputRef,
 @Nullable RexNode literal)