io.questdb.cairo.sql.PageFrameCursor Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
 *
 *  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.
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package io.questdb.cairo.sql;

import io.questdb.cairo.SymbolMapReader;
import org.jetbrains.annotations.Nullable;

import java.io.Closeable;

public interface PageFrameCursor extends Closeable {
    @Override
    void close(); // we don't throw IOException

    @Nullable PageFrame next();

    void toTop();

    long size();

    SymbolMapReader getSymbolMapReader(int columnIndex);
}