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

Class LegacyScalarFunctionConvertRule

java.lang.Object

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

All Implemented Interfaces:

CallExpressionConvertRule

public class LegacyScalarFunctionConvertRule
extends Object
implements CallExpressionConvertRule

CallExpressionConvertRule to convert ScalarFunctionDefinition.

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
LegacyScalarFunctionConvertRule()

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

LegacyScalarFunctionConvertRule

public LegacyScalarFunctionConvertRule()

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().