com.hazelcast.org.apache.calcite.sql.SqlUnresolvedFunction Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.org.licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.sql;
import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.rel.type.RelDataTypeFactory;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeChecker;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeInference;
import com.hazelcast.org.apache.calcite.sql.type.SqlReturnTypeInference;
import com.hazelcast.org.apache.calcite.sql.type.SqlTypeName;
import java.util.List;
/**
* Placeholder for an unresolved function.
*
* Created by the parser, then it is rewritten to proper SqlFunction by
* the validator to a function defined in a Calcite schema.
*/
public class SqlUnresolvedFunction extends SqlFunction {
/**
* Creates a placeholder SqlUnresolvedFunction for an invocation of a function
* with a possibly qualified name. This name must be resolved into either
* a builtin function or a user-defined function.
*
* @param sqlIdentifier possibly qualified identifier for function
* @param returnTypeInference strategy to use for return type inference
* @param operandTypeInference strategy to use for parameter type inference
* @param operandTypeChecker strategy to use for parameter type checking
* @param paramTypes array of parameter types
* @param funcType function category
*/
public SqlUnresolvedFunction(
SqlIdentifier sqlIdentifier,
SqlReturnTypeInference returnTypeInference,
SqlOperandTypeInference operandTypeInference,
SqlOperandTypeChecker operandTypeChecker,
List paramTypes,
SqlFunctionCategory funcType) {
super(sqlIdentifier, returnTypeInference, operandTypeInference,
operandTypeChecker, paramTypes, funcType);
}
/**
* {@inheritDoc}T
*
* The operator class for this function isn't resolved to the
* correct class. This happens in the case of user defined
* functions. Return the return type to be 'ANY', so we don't
* fail.
*/
@Override public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
final RelDataTypeFactory typeFactory = opBinding.getTypeFactory();
return typeFactory.createTypeWithNullability(
typeFactory.createSqlType(SqlTypeName.ANY), true);
}
}