/*
 * 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.runtime.operators.sort;

import org.apache.flink.streaming.api.operators.OneInputStreamOperator;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
import org.apache.flink.table.data.RowData;
import org.apache.flink.table.runtime.operators.TableStreamOperator;
import org.apache.flink.table.runtime.util.StreamRecordCollector;
import org.apache.flink.util.Collector;

/** Operator for batch limit. TODO support stopEarly. */
public class LimitOperator extends TableStreamOperator<RowData>
        implements OneInputStreamOperator<RowData, RowData> {

    private final boolean isGlobal;
    private final long limitStart;
    private final long limitEnd;

    private transient Collector<RowData> collector;
    private transient int count = 0;

    public LimitOperator(boolean isGlobal, long limitStart, long limitEnd) {
        this.isGlobal = isGlobal;
        this.limitStart = limitStart;
        this.limitEnd = limitEnd;
    }

    @Override
    public void open() throws Exception {
        super.open();
        this.collector = new StreamRecordCollector<>(output);
    }

    @Override
    public void processElement(StreamRecord<RowData> element) throws Exception {
        if (count < limitEnd) {
            count++;
            if (!isGlobal || count > limitStart) {
                collector.collect(element.getValue());
            }
        }
    }
}

/*
 * 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.runtime.operators.sort;

import org.apache.flink.streaming.api.operators.OneInputStreamOperator;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
import org.apache.flink.table.data.RowData;
import org.apache.flink.table.runtime.operators.TableStreamOperator;

/** Operator for batch limit. TODO support stopEarly. */
public class LimitOperator extends TableStreamOperator<RowData>
        implements OneInputStreamOperator<RowData, RowData> {

    private final boolean isGlobal;
    private final long limitStart;
    private final long limitEnd;

    private transient int count = 0;

    public LimitOperator(boolean isGlobal, long limitStart, long limitEnd) {
        this.isGlobal = isGlobal;
        this.limitStart = limitStart;
        this.limitEnd = limitEnd;
    }

    @Override
    public void processElement(StreamRecord<RowData> element) throws Exception {
        if (count < limitEnd) {
            count++;
            if (!isGlobal || count > limitStart) {
                output.collect(element);
            }
        }
    }
}

Remove useless collector in LimitOperator