tbl_indexes.php

WEBGAME源码,有架设说明,只是非常简单

<?php
/* $Id: tbl_indexes.php 9602 2006-10-25 12:25:01Z nijel $ */
// vim: expandtab sw=4 ts=4 sts=4:

/**
 * Gets some core libraries
 */
require_once('./libraries/common.lib.php');
require_once('./libraries/tbl_indexes.lib.php');

/**
 * Defines the index types ("FULLTEXT" is available since MySQL 3.23.23)
 */
$index_types       = PMA_get_indextypes();
$index_types_cnt   = count($index_types);

/**
 * Ensures the db & table are valid, then loads headers and gets indexes
 * informations.
 * Skipped if this script is called by "tbl_sql.php"
 */
if (!defined('PMA_IDX_INCLUDED')) {
    // Not a valid db name -> back to the welcome page
    if ( isset($db) && strlen($db) ) {
        $is_db = PMA_DBI_select_db($db);
    }
    if ( !isset($db) || !strlen($db) || !$is_db ) {
        $uri_params = array( 'reload' => '1' );
        if ( isset($message) ) {
            $uri_params['message'] = $message;
        }
        PMA_sendHeaderLocation($cfg['PmaAbsoluteUri'] . 'main.php'
            . PMA_generate_common_url($uri_params, '&'));
        exit;
    }
    // Not a valid table name -> back to the default db sub-page
    if ( isset($table) && strlen($table) ) {
        $is_table = PMA_DBI_query('SHOW TABLES LIKE \''
            . PMA_sqlAddslashes($table, TRUE) . '\'', null, PMA_DBI_QUERY_STORE);
    }
    if ( ! isset($table) || ! strlen($table)
      || !( $is_table && PMA_DBI_num_rows($is_table) ) ) {
        $uri_params = array( 'reload' => '1', 'db' => $db );
        if ( isset($message) ) {
            $uri_params['message'] = $message;
        }
        PMA_sendHeaderLocation($cfg['PmaAbsoluteUri']
            . $cfg['DefaultTabDatabase']
            . PMA_generate_common_url($uri_params, '&'));
        exit;
    } elseif ( isset($is_table) ) {
        PMA_DBI_free_result($is_table);
    }

    // Displays headers (if needed)
    $js_to_run = isset($index) && isset($do_save_data)
        ? 'functions.js'
        : 'indexes.js';
    require_once('./libraries/header.inc.php');
} // end if


/**
 * Gets fields and indexes informations
 */
if (!defined('PMA_IDX_INCLUDED')) {
    $err_url_0 = 'db_sql.php?' . PMA_generate_common_url($db);
}

//  Gets table keys and store them in arrays
$indexes      = array();
$indexes_info = array();
$indexes_data = array();
// keys had already been grabbed in "tbl_sql.php"
if (!defined('PMA_IDX_INCLUDED')) {
    $ret_keys = PMA_get_indexes($table, $err_url_0);
}

PMA_extract_indexes($ret_keys, $indexes, $indexes_info, $indexes_data);

// Get fields and stores their name/type
// fields had already been grabbed in "tbl_sql.php"
if (!defined('PMA_IDX_INCLUDED')) {
    $fields_rs   = PMA_DBI_query('SHOW FIELDS FROM '
        . PMA_backquote($table) . ';');
    $save_row   = array();
    while ($row = PMA_DBI_fetch_assoc($fields_rs)) {
        $save_row[] = $row;
    }
}

$fields_names           = array();
$fields_types           = array();
foreach ($save_row AS $saved_row_key => $row) {
    $fields_names[]     = $row['Field'];
    // loic1: set or enum types: slashes single quotes inside options
    if (preg_match('@^(set|enum)\((.+)\)$@i', $row['Type'], $tmp)) {
        $tmp[2]         = substr(preg_replace('@([^,])\'\'@', '\\1\\\'',
            ',' . $tmp[2]), 1);
        $fields_types[] = $tmp[1] . '(' . str_replace(',', ', ', $tmp[2]) . ')';
    } else {
        $fields_types[] = $row['Type'];
    }
} // end while

if ($fields_rs) {
    PMA_DBI_free_result($fields_rs);
}


/**
 * Do run the query to build the new index and moves back to
 * "tbl_sql.php"
 */
if (!defined('PMA_IDX_INCLUDED')
    && (isset($index) && isset($do_save_data))) {

    $err_url     = 'tbl_indexes.php?' . PMA_generate_common_url($db, $table);
    if (empty($old_index)) {
        $err_url .= '&amp;create_index=1&amp;idx_num_fields=' . $idx_num_fields;
    } else {
        $err_url .= '&amp;index=' . urlencode($old_index);
    }

    if ($index_type == 'PRIMARY') {
        if ($index == '') {
            $index = 'PRIMARY';
        } elseif ($index != 'PRIMARY') {
            PMA_mysqlDie($strPrimaryKeyName, '', FALSE, $err_url);
        }
    } elseif ($index == 'PRIMARY') {
         PMA_mysqlDie($strCantRenameIdxToPrimary, '', FALSE, $err_url);
    }


    // $sql_query is the one displayed in the query box
    $sql_query         = 'ALTER TABLE ' . PMA_backquote($table);

    // Drops the old index
    if (!empty($old_index)) {
        if ($old_index == 'PRIMARY') {
            $sql_query .= ' DROP PRIMARY KEY,';
        } else {
            $sql_query .= ' DROP INDEX ' . PMA_backquote($old_index) .',';
        }
    } // end if

    // Builds the new one
    switch ($index_type) {
        case 'PRIMARY':
            $sql_query .= ' ADD PRIMARY KEY (';
            break;
        case 'FULLTEXT':
            $sql_query .= ' ADD FULLTEXT '
                . (empty($index) ? '' : PMA_backquote($index)) . ' (';
            break;
        case 'UNIQUE':
            $sql_query .= ' ADD UNIQUE '
                . (empty($index) ? '' : PMA_backquote($index)) . ' (';
            break;
        case 'INDEX':
            $sql_query .= ' ADD INDEX '
                . (empty($index) ? '' : PMA_backquote($index)) . ' (';
            break;
    } // end switch
    $index_fields         = '';
    foreach ($column AS $i => $name) {
        if ($name != '--ignore--') {
            $index_fields .= (empty($index_fields) ? '' : ',')
                          . PMA_backquote($name)
                          . (empty($sub_part[$i])
                                ? ''
                                : '(' . $sub_part[$i] . ')');
        }
    } // end while
    if (empty($index_fields)){
        PMA_mysqlDie($strNoIndexPartsDefined, '', FALSE, $err_url);
    } else {
        $sql_query .= $index_fields . ')';
    }

    $result    = PMA_DBI_query($sql_query);
    $message   = $strTable . ' ' . htmlspecialchars($table) . ' '
        . $strHasBeenAltered;

    $active_page = 'tbl_structure.php';
    require('./tbl_structure.php');
} // end builds the new index


/**
 * Edits an index or defines a new one
 */
elseif (!defined('PMA_IDX_INCLUDED')
         && (isset($index) || isset($create_index))) {

    // Prepares the form values
    if (!isset($index)) {
        $index                                = '';
    }
    if (!isset($old_index)){
        $old_index                            = $index;
    }
    if (!isset($index_type)) {
        $index_type                           = '';
    }
    if ($old_index == '' || !isset($indexes_info[$old_index])) {
        $edited_index_info['Sequences']       = array();
        $edited_index_data                    = array();
        for ($i = 1; $i <= $idx_num_fields; $i++) {
            $edited_index_info['Sequences'][] = $i;
            $edited_index_data[$i]            = array('Column_name' => '',
                'Sub_part' => '');
        } // end for
        if ($old_index == ''
            && !isset($indexes_info['PRIMARY'])
            && ($index_type == '' || $index_type == 'PRIMARY')) {
            $old_index                        = 'PRIMARY';
        }
    } else {
        $edited_index_info                    = $indexes_info[$old_index];
        $edited_index_data                    = $indexes_data[$old_index];


        if ((PMA_MYSQL_INT_VERSION < 40002
            && $edited_index_info['Comment'] == 'FULLTEXT')
          || (PMA_MYSQL_INT_VERSION >= 40002
            && $edited_index_info['Index_type'] == 'FULLTEXT')) {
            $index_type                       = 'FULLTEXT';
        } elseif ($index == 'PRIMARY') {
            $index_type                       = 'PRIMARY';
        } elseif ($edited_index_info['Non_unique'] == '0') {
            $index_type                       = 'UNIQUE';
        } else {
            $index_type                       = 'INDEX';
        }
    } // end if... else...

    if (isset($add_fields)) {
        if (isset($prev_add_fields)) {
            $added_fields += $prev_add_fields;
        }
        $field_cnt = count($edited_index_info['Sequences']) + 1;
        for ($i = $field_cnt; $i < ($added_fields + $field_cnt); $i++) {