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

Class DirectConvertRule

java.lang.Object

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

All Implemented Interfaces:

CallExpressionConvertRule

@Internal
public class DirectConvertRule
extends Object
implements CallExpressionConvertRule

A CallExpressionConvertRule that performs a simple one-to-one mapping between FunctionDefinition and a corresponding SqlOperator.

Nested Class Summary

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

CallExpressionConvertRule.ConvertContext

Constructor Summary

Constructors

Constructor	Description
DirectConvertRule()

Method Summary

Modifier and Type	Method	Description
Optional<org.apache.calcite.rex.RexNode>	convert(CallExpression call, CallExpressionConvertRule.ConvertContext context)	Convert call expression with context to RexNode.
static DirectConvertRule	instance(boolean isBatchMode)

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectConvertRule

public DirectConvertRule()

Method Detail

instance

public static DirectConvertRule instance(boolean isBatchMode)

convert

public Optional<org.apache.calcite.rex.RexNode> convert(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().