spark TableIndex 源码
spark TableIndex 代码
文件路径:/sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/index/TableIndex.java
/*
* 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.spark.sql.connector.catalog.index;
import java.util.Collections;
import java.util.Map;
import java.util.Properties;
import org.apache.spark.annotation.Evolving;
import org.apache.spark.sql.connector.expressions.NamedReference;
/**
* Index in a table
*
* @since 3.3.0
*/
@Evolving
public final class TableIndex {
private String indexName;
private String indexType;
private NamedReference[] columns;
private Map<NamedReference, Properties> columnProperties = Collections.emptyMap();
private Properties properties;
public TableIndex(
String indexName,
String indexType,
NamedReference[] columns,
Map<NamedReference, Properties> columnProperties,
Properties properties) {
this.indexName = indexName;
this.indexType = indexType;
this.columns = columns;
this.columnProperties = columnProperties;
this.properties = properties;
}
/**
* @return the Index name.
*/
public String indexName() { return indexName; }
/**
* @return the indexType of this Index.
*/
public String indexType() { return indexType; }
/**
* @return the column(s) this Index is on. Could be multi columns (a multi-column index).
*/
public NamedReference[] columns() { return columns; }
/**
* @return the map of column and column property map.
*/
public Map<NamedReference, Properties> columnProperties() { return columnProperties; }
/**
* Returns the index properties.
*/
public Properties properties() { return properties; }
}
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