informixtransferhelper.java

一个用java写的开源的数据库系统

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package org.hsqldb.util;

import java.sql.*;

// fredt@users 20020215 - patch 516309 by Nicolas Bazin - transfer Informix
// sqlbob@users 20020325 - patch 1.7.0 - reengineering

/**
 * Conversions from Informix databases
 *
 * @author Nichola Bazin
 * @version 1.7.0
 */
class InformixTransferHelper extends TransferHelper {

    public InformixTransferHelper() {
        super();
    }

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

    void setSchema(String _Schema) {
        sSchema = "\"" + _Schema + "\"";
    }

    int convertFromType(int type) {

        //Correct a bug in Informix JDBC driver that maps:
        // DATETIME YEAR TO FRACTION to TIME and
        // DATETIME HOUR TO SECOND to TIMESTAMP
        if (type == Types.TIMESTAMP) {
            type = Types.TIME;

            tracer.trace("Converted INFORMIX TIMESTAMP to TIME");
        } else if (type == Types.TIME) {
            type = Types.TIMESTAMP;

            tracer.trace("Converted INFORMIX TIME to TIMESTAMP");
        }

        return (type);
    }

    int convertToType(int type) {

        //Correct a bug in Informix JDBC driver that maps:
        // DATETIME YEAR TO FRACTION to TIME and
        // DATETIME HOUR TO SECOND to TIMESTAMP
        if (type == Types.TIMESTAMP) {
            type = Types.TIME;

            tracer.trace("Converted TIMESTAMP to INFORMIX TIME");
        } else if (type == Types.TIME) {
            type = Types.TIMESTAMP;

            tracer.trace("Converted TIME to INFORMIX TIMESTAMP");
        }

        return (type);
    }
}