return getMetaData().getImportedKeys(getCatalog(), getSchemaPattern(), tableNamePattern);
return getMetaData().getIndexInfo(getCatalog(), getSchemaPattern(), tableNamePattern, unique, approximate);
    public ResultSet getIndices(String tableNamePattern, boolean unique, boolean approximate) throws SQLException    {        return getMetaData().getImportedKeys(getCatalog(), getSchemaPattern(), tableNamePattern);    }