Package org.apache.flink.table.expressions

Class ModelReferenceExpression

java.lang.Object

org.apache.flink.table.expressions.ModelReferenceExpression

All Implemented Interfaces:

org.apache.flink.table.expressions.Expression, org.apache.flink.table.expressions.ResolvedExpression

@Internal
public final class ModelReferenceExpression
extends Object
implements org.apache.flink.table.expressions.ResolvedExpression

A reference to a Model in an expression context.

This expression is used when a model needs to be passed as an argument to functions or operations that accept model references. It wraps a model object and provides the necessary expression interface for use in the Table API expression system.

The expression carries a string representation of the model and uses a special data type to indicate that this is a model reference rather than a regular data value.

Constructor Summary

Constructors

Constructor	Description
ModelReferenceExpression(String name, ContextResolvedModel model, TableEnvironment env)

Method Summary

Modifier and Type	Method	Description
<R> R	accept(org.apache.flink.table.expressions.ExpressionVisitor<R> visitor)
String	asSerializableString(org.apache.flink.table.expressions.SqlFactory sqlFactory)
String	asSummaryString()
boolean	equals(Object o)
List<org.apache.flink.table.expressions.Expression>	getChildren()
org.apache.flink.table.types.DataType	getInputDataType()	Returns the input data type expected by this model reference.
ContextResolvedModel	getModel()	Returns the ContextResolvedModel associated with this model reference.
String	getName()	Returns the name of this model reference.
org.apache.flink.table.types.DataType	getOutputDataType()
List<org.apache.flink.table.expressions.ResolvedExpression>	getResolvedChildren()
TableEnvironment	getTableEnvironment()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.table.expressions.ResolvedExpression

asSerializableString

Constructor Detail

ModelReferenceExpression

public ModelReferenceExpression(String name,
                                ContextResolvedModel model,
                                TableEnvironment env)

Method Detail

getName

public String getName()

Returns the name of this model reference.

Returns:

the model reference name

getModel

public ContextResolvedModel getModel()

Returns the ContextResolvedModel associated with this model reference.

Returns:

the query context resolved model

getTableEnvironment

@Nullable
public TableEnvironment getTableEnvironment()

getInputDataType

public org.apache.flink.table.types.DataType getInputDataType()

Returns the input data type expected by this model reference.

This method extracts the input data type from the model's input schema, which describes the structure and data types that the model expects for inference operations.

Returns:

the input data type expected by the model

getOutputDataType

public org.apache.flink.table.types.DataType getOutputDataType()

Specified by:

getOutputDataType in interface org.apache.flink.table.expressions.ResolvedExpression

getResolvedChildren

public List<org.apache.flink.table.expressions.ResolvedExpression> getResolvedChildren()

Specified by:

getResolvedChildren in interface org.apache.flink.table.expressions.ResolvedExpression

asSerializableString

public String asSerializableString(org.apache.flink.table.expressions.SqlFactory sqlFactory)

Specified by:

asSerializableString in interface org.apache.flink.table.expressions.ResolvedExpression

asSummaryString

public String asSummaryString()

Specified by:

asSummaryString in interface org.apache.flink.table.expressions.Expression

getChildren

public List<org.apache.flink.table.expressions.Expression> getChildren()

Specified by:

getChildren in interface org.apache.flink.table.expressions.Expression

accept

public <R> R accept(org.apache.flink.table.expressions.ExpressionVisitor<R> visitor)

Specified by:

accept in interface org.apache.flink.table.expressions.Expression

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object