org.apache.flink.table.planner.expressions.converter

Class FunctionDefinitionConvertRule

java.lang.Object

org.apache.flink.table.planner.expressions.converter.FunctionDefinitionConvertRule

All Implemented Interfaces:

CallExpressionConvertRule

public class FunctionDefinitionConvertRule
extends Object
implements CallExpressionConvertRule

A call expression converter rule that converts calls to user defined functions.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.planner.expressions.converter.CallExpressionConvertRule

CallExpressionConvertRule.ConvertContext

Constructor Summary

Constructors

Constructor and Description
FunctionDefinitionConvertRule()

Method Summary

Modifier and Type	Method and Description
Optional<org.apache.calcite.rex.RexNode>	convert(org.apache.flink.table.expressions.CallExpression call, CallExpressionConvertRule.ConvertContext context) Convert call expression with context to RexNode.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionDefinitionConvertRule

public FunctionDefinitionConvertRule()

Method Detail

convert

public Optional<org.apache.calcite.rex.RexNode> convert(org.apache.flink.table.expressions.CallExpression call,
                                                        CallExpressionConvertRule.ConvertContext context)

Description copied from interface: CallExpressionConvertRule

Convert call expression with context to RexNode.

Specified by:

convert in interface CallExpressionConvertRule

Returns:

Success return RexNode of Optional.of(T), Fail return Optional.empty().