/*
* 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 compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.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 org.apache.ignite.internal.processors.query.h2.sql;
/**
* AST for SQL.
*/
public interface GridSqlAst {
/**
* @return Generate sql from this AST.
*/
public String getSQL();
/**
* @return Number of child nodes.
*/
public int size();
/**
* Get child by index.
*
* @param childIdx Index of the requested child.
* @return Child element.
*/
public <E extends GridSqlAst> E child(int childIdx);
/**
* Get the first child.
*
* @return Child element.
*/
public <E extends GridSqlAst> E child();
/**
* Set child.
*
* @param childIdx Index of the requested child.
* @param child Child element.
*/
public <E extends GridSqlAst> void child(int childIdx, E child);
/**
* @return Optional expression result type (if this is an expression and result type is known).
*/
public GridSqlType resultType();
}