org.teiid.query.sql.symbol.Expression Maven / Gradle / Ivy
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* Copyright Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags and
* the COPYRIGHT.txt file distributed with this work.
*
* Licensed 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
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*/
package org.teiid.query.sql.symbol;
import org.teiid.query.sql.LanguageObject;
/**
* This is the interface for an expression in a SQL string. Expressions can be of several
* types (see subclasses), but all expressions have a type. These types are used for
* type checking.
*/
public interface Expression extends LanguageObject {
/**
* Get the return type of this expression.
* @return Java class may be null prior to being resolved
*/
Class getType();
}