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

Class OverConvertRule

java.lang.Object

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

All Implemented Interfaces:

CallExpressionConvertRule

public class OverConvertRule
extends Object
implements CallExpressionConvertRule

A CallExpressionConvertRule that converts BuiltInFunctionDefinitions.OVER.

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
OverConvertRule()

Method Summary

Modifier and Type	Method and Description
Optional<org.apache.calcite.rex.RexNode>	convert(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

OverConvertRule

public OverConvertRule()

Method Detail

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().