/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
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 *  http://www.apache.org/licenses/LICENSE-2.0
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 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
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package org.jooq;

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// ...
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import static org.jooq.SQLDialect.POSTGRES;
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/**
 * An intermediate step in the construction of a {@link WindowSpecification}.
 * <p>
 * Example: <code><pre>
 * WindowSpecification spec =
 * DSL.partitionBy(BOOK.AUTHOR_ID)
 *    .orderBy(BOOK.ID)
 *    .rowsBetweenUnboundedPreceding()
 *    .andCurrentRow();
 * </pre></code>
 *
 * @author Lukas Eder
 */
public interface WindowSpecificationRowsAndStep {

    /**
     * Add a <code>... AND UNBOUNDED PRECEDING</code> frame clause to the window
     * specification.
     */
    @Support({ POSTGRES })
    WindowSpecificationFinalStep andUnboundedPreceding();

    /**
     * Add a <code>... AND [number] PRECEDING</code> frame clause to the window
     * specification.
     */
    @Support({ POSTGRES })
    WindowSpecificationFinalStep andPreceding(int number);

    /**
     * Add a <code>... AND CURRENT ROW</code> frame clause to the window
     * specification.
     */
    @Support({ POSTGRES })
    WindowSpecificationFinalStep andCurrentRow();

    /**
     * Add a <code>... AND UNBOUNDED FOLLOWING</code> frame clause to the window
     * specification.
     */
    @Support({ POSTGRES })
    WindowSpecificationFinalStep andUnboundedFollowing();

    /**
     * Add a <code>... AND [number] FOLLOWING</code> frame clause to the window
     * specification.
     */
    @Support({ POSTGRES })
    WindowSpecificationFinalStep andFollowing(int number);

}