com.hazelcast.org.apache.calcite.sql.fun.LibraryOperator Maven / Gradle / Ivy
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* 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.fun;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* An annotation that is read by {@link SqlLibraryOperatorTableFactory} to
* add functions and operators to a library.
*
* Typically, such collections are associated with a particular dialect or
* database. For example, {@link SqlLibrary#ORACLE} is a collection of functions
* that are in the Oracle database but not the SQL standard.
*
*
In {@link SqlLibraryOperatorTableFactory} this annotation is applied to
* function definitions to include them in a particular library. It allows
* an operator to belong to more than one library.
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface LibraryOperator {
/** The set of libraries that this function or operator belongs to.
* Must not be null or empty. */
SqlLibrary[] libraries();
}