mckoitransferhelper.java

hsqldb是100％java实现的数据库,是一个开放源代码的JAVA数据库 l 具有标准的SQL语法和JAVA接口 l HSQLDB可以自由使用和分发 l 非常简洁和快速的

/* Copyright (c) 2001-2005, The HSQL Development Group
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
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 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
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 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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package org.hsqldb.util;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

/**
 * Helper class for conversion from a different databases
 *
 * @author sqlbob@users
 * @version 1.7.0
 */
class McKoiTransferHelper extends TransferHelper {

    McKoiTransferHelper() {
        super();
    }

    String fixupColumnDefRead(TransferTable t, ResultSetMetaData meta,
                              String columnType, ResultSet columnDesc,
                              int columnIndex) throws SQLException {

        String CompareString = "UNIQUEKEY(\'" + t.Stmts.sDestTable + "\'";

        if (columnType.indexOf(CompareString) > 0) {

            // We just found a increment
            columnType = "SERIAL";
        }

        return (columnType);
    }

    public McKoiTransferHelper(TransferDb database, Traceable t, String q) {
        super(database, t, q);
    }

    String fixupColumnDefWrite(TransferTable t, ResultSetMetaData meta,
                               String columnType, ResultSet columnDesc,
                               int columnIndex) throws SQLException {

        if (columnType.equals("SERIAL")) {
            columnType = "INTEGER DEFAULT UNIQUEKEY (\'"
                         + t.Stmts.sSourceTable + "\')";
        }

        return (columnType);
    }

    boolean needTransferTransaction() {
        return (true);
    }
}