tbl_relation.php

一个用PHP编写的

<?php
/* $Id: tbl_relation.php,v 2.31.2.1 2006/04/11 17:51:03 cybot_tm Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:

/**
 * Gets some core libraries
 */
require_once('./libraries/common.lib.php');
require_once('./libraries/tbl_properties_common.php');
$url_query .= '&amp;goto=tbl_properties.php';


/**
 * Gets tables informations
 */
require_once('./libraries/tbl_properties_table_info.inc.php');

// Note: in libraries/tbl_properties_links.inc.php we get and display the table comment.
// For InnoDB, this comment contains the REFER information but any update
// has not been done yet (will be done in tbl_relation.php later).
$avoid_show_comment = TRUE;

/**
 * Displays top menu links
 */
require_once('./libraries/tbl_properties_links.inc.php');

require_once('./libraries/relation.lib.php');

$options_array = array('CASCADE' => 'CASCADE', 'SET_NULL' => 'SET NULL', 'NO_ACTION' => 'NO ACTION', 'RESTRICT' => 'RESTRICT');

/**
 * Generate dropdown choices
 *
 * @param   string   Message to display
 * @param   string   Name of the <select> field
 * @param   array    Choices for dropdown
 * @return  string   The existing value (for selected)
 *
 * @access  public
 */
function PMA_generate_dropdown($dropdown_question, $radio_name, $choices, $selected_value)
{
    echo $dropdown_question . '&nbsp;&nbsp;';

    echo '<select name="' . $radio_name . '">' . "\n";
    echo '<option value="nix">--</option>' . "\n";

    foreach ($choices AS $one_value => $one_label) {
        echo '<option value="' . $one_value . '"';
        if ($selected_value == $one_value) {
            echo ' selected="selected" ';
        }
        echo '>' . $one_label . '</option>' . "\n";
    }
    echo '</select>' . "\n";
    echo "\n";
}


/**
 * Gets the relation settings
 */
$cfgRelation = PMA_getRelationsParam();


/**
 * Updates
 */

// ensure we are positionned to our current db (since the previous reading
// of relations makes pmadb the current one, maybe depending on the MySQL version)
PMA_DBI_select_db($db);

if ($cfgRelation['relwork']) {
    $existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if ($tbl_type=='INNODB') {
    $existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
}
if ($cfgRelation['displaywork']) {
    $disp     = PMA_getDisplayField($db, $table);
}

// u p d a t e s   f o r   I n t e r n a l    r e l a t i o n s
if (isset($destination) && $cfgRelation['relwork']) {

    foreach ($destination AS $master_field => $foreign_string) {
        if ($foreign_string != 'nix') {
            list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
            if (!isset($existrel[$master_field])) {
                $upd_query  = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
                            . '(master_db, master_table, master_field, foreign_db, foreign_table, foreign_field)'
                            . ' values('
                            . '\'' . PMA_sqlAddslashes($db) . '\', '
                            . '\'' . PMA_sqlAddslashes($table) . '\', '
                            . '\'' . PMA_sqlAddslashes($master_field) . '\', '
                            . '\'' . PMA_sqlAddslashes($foreign_db) . '\', '
                            . '\'' . PMA_sqlAddslashes($foreign_table) . '\','
                            . '\'' . PMA_sqlAddslashes($foreign_field) . '\')';
            } elseif ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
                $upd_query  = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation']) . ' SET'
                            . ' foreign_db       = \'' . PMA_sqlAddslashes($foreign_db) . '\', '
                            . ' foreign_table    = \'' . PMA_sqlAddslashes($foreign_table) . '\', '
                            . ' foreign_field    = \'' . PMA_sqlAddslashes($foreign_field) . '\' '
                            . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
                            . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
                            . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
            } // end if... else....
        } elseif (isset($existrel[$master_field])) {
            $upd_query      = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
                            . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
                            . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
                            . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
        } // end if... else....
        if (isset($upd_query)) {
            $upd_rs         = PMA_query_as_cu($upd_query);
            unset($upd_query);
        }
    } // end while
} // end if (updates for internal relations)

// u p d a t e s   f o r   I n n o D B
// ( for now, one index name only; we keep the definitions if the
// foreign db is not the same)
if (isset($_REQUEST['destination_innodb'])) {
    foreach ($_REQUEST['destination_innodb'] as $master_field => $foreign_string) {
        if ($foreign_string != 'nix') {
            list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
            if (!isset($existrel_innodb[$master_field])) {
                // no key defined for this field

                // The next few lines are repeated below, so they
                // could be put in an include file
                // Note: I tried to enclose the db and table name with
                // backquotes but MySQL 4.0.16 did not like the syntax
                // (for example: `base2`.`table1` )

                $upd_query  = 'ALTER TABLE ' . PMA_backquote($table)
                            . ' ADD FOREIGN KEY ('
                            . PMA_backquote($master_field) . ')'
                            . ' REFERENCES '
                            . PMA_backquote($foreign_db) . '.'
                            . PMA_backquote($foreign_table) . '('
                            . PMA_backquote($foreign_field) . ')';

                if ($_REQUEST['on_delete'][$master_field] != 'nix') {
                    $upd_query   .= ' ON DELETE ' . $options_array[$_REQUEST['on_delete'][$master_field]];
                }
                if ($_REQUEST['on_update'][$master_field] != 'nix') {
                    $upd_query   .= ' ON UPDATE ' . $options_array[$_REQUEST['on_update'][$master_field]];
                }

                // end repeated code

            } elseif (($existrel_innodb[$master_field]['foreign_db'] . '.' .$existrel_innodb[$master_field]['foreign_table'] . '.' . $existrel_innodb[$master_field]['foreign_field'] != $foreign_string)
              || ( $_REQUEST['on_delete'][$master_field] != (!empty($existrel_innodb[$master_field]['on_delete']) ? $existrel_innodb[$master_field]['on_delete'] : ''))
              || ( $_REQUEST['on_update'][$master_field] != (!empty($existrel_innodb[$master_field]['on_update']) ? $existrel_innodb[$master_field]['on_update'] : ''))
                   ) {
                // another foreign key is already defined for this field
                // or
                // an option has been changed for ON DELETE or ON UPDATE

                // remove existing key
                if (PMA_MYSQL_INT_VERSION >= 40013) {
                    $upd_query  = 'ALTER TABLE ' . PMA_backquote($table)
                                . ' DROP FOREIGN KEY '
                                . PMA_backquote($existrel_innodb[$master_field]['constraint']);

                    // I tried to send both in one query but it failed
                    $upd_rs     = PMA_DBI_query($upd_query);
                }

                // add another
                $upd_query  = 'ALTER TABLE ' . PMA_backquote($table)
                            . ' ADD FOREIGN KEY ('
                            . PMA_backquote($master_field) . ')'
                            . ' REFERENCES '
                            . PMA_backquote($foreign_db) . '.'
                            . PMA_backquote($foreign_table) . '('
                            . PMA_backquote($foreign_field) . ')';

                if ($_REQUEST['on_delete'][$master_field] != 'nix') {
                    $upd_query   .= ' ON DELETE '
                        . $options_array[$_REQUEST['on_delete'][$master_field]];
                }
                if ($_REQUEST['on_update'][$master_field] != 'nix') {
                    $upd_query   .= ' ON UPDATE '
                        . $options_array[$_REQUEST['on_update'][$master_field]];
                }

            } // end if... else....
        } elseif (isset($existrel_innodb[$master_field])) {
                if (PMA_MYSQL_INT_VERSION >= 40013) {
                    $upd_query  = 'ALTER TABLE ' . PMA_backquote($table)
                            . ' DROP FOREIGN KEY '
                            . PMA_backquote($existrel_innodb[$master_field]['constraint']);
                }
        } // end if... else....

        if (isset($upd_query)) {
            $upd_rs    = PMA_DBI_try_query($upd_query);
            $tmp_error = PMA_DBI_getError();
            if (substr($tmp_error, 1, 4) == '1216') {
                PMA_mysqlDie($tmp_error, $upd_query, FALSE, '', FALSE);
                echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
            }
            if (substr($tmp_error, 1, 4) == '1005') {
                echo '<p class="warning">' . $strNoIndex . ' (' . $master_field
                    .')</p>'  . PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
            }
            unset($upd_query, $tmp_error);
        }
    } // end while
} // end if isset($destination_innodb)


// U p d a t e s   f o r   d i s p l a y   f i e l d

if ($cfgRelation['displaywork']
    && isset($display_field)) {

    if ($disp) {
        if ($display_field != '') {
            $upd_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
                       . ' SET display_field = \'' . PMA_sqlAddslashes($display_field) . '\''
                       . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
        } else {
            $upd_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
                       . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
                       . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
        }
    } elseif ($display_field != '') {
        $upd_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
                   . '(db_name, table_name, display_field) '
                   . ' VALUES('
                   . '\'' . PMA_sqlAddslashes($db) . '\','
                   . '\'' . PMA_sqlAddslashes($table) . '\','
                   . '\'' . PMA_sqlAddslashes($display_field) . '\')';
    }

    if (isset($upd_query)) {
        $upd_rs    = PMA_query_as_cu($upd_query);
    }
} // end if

// If we did an update, refresh our data
if (isset($destination) && $cfgRelation['relwork']) {
    $existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if (isset($destination_innodb) && $tbl_type=='INNODB') {
    $existrel_innodb = PMA_getForeigners($db, $table, '', 'innodb');
}

if ($cfgRelation['displaywork']) {
    $disp     = PMA_getDisplayField($db, $table);
}


/**
 * Dialog
 */

// common form
echo '<form method="post" action="tbl_relation.php">' . "\n";
echo PMA_generate_common_hidden_inputs($db, $table);


// relations

if ($cfgRelation['relwork'] || $tbl_type=='INNODB') {
    // To choose relations we first need all tables names in current db