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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 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.flink.table.api;
import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.table.expressions.Expression;
import org.apache.flink.table.expressions.ExpressionParser;
import java.util.List;
/**
* Partially defined over window with partitioning.
*/
@PublicEvolving
public final class OverWindowPartitioned {
/** Defines a partitioning of the input on one or more attributes. */
private final List partitionBy;
OverWindowPartitioned(List partitionBy) {
this.partitionBy = partitionBy;
}
/**
* Specifies the time attribute on which rows are ordered.
*
* For streaming tables, reference a rowtime or proctime time attribute here
* to specify the time mode.
*
*
For batch tables, refer to a timestamp or long attribute.
*
* @param orderBy field reference
* @return an over window with defined order
*/
public OverWindowPartitionedOrdered orderBy(String orderBy) {
return this.orderBy(ExpressionParser.parseExpression(orderBy));
}
/**
* Specifies the time attribute on which rows are ordered.
*
*
For streaming tables, reference a rowtime or proctime time attribute here
* to specify the time mode.
*
*
For batch tables, refer to a timestamp or long attribute.
*
* @param orderBy field reference
* @return an over window with defined order
*/
public OverWindowPartitionedOrdered orderBy(Expression orderBy) {
return new OverWindowPartitionedOrdered(partitionBy, orderBy);
}
}