sql.php

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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * @todo    we must handle the case if sql.php is called directly with a query
 *          what returns 0 rows - to prevent cyclic redirects or includes
 * @version $Id: sql.php 12163 2009-01-01 21:39:21Z lem9 $
 */

/**
 * Gets some core libraries
 */
require_once './libraries/common.inc.php';
require_once './libraries/Table.class.php';
require_once './libraries/check_user_privileges.lib.php';
require_once './libraries/bookmark.lib.php';

$GLOBALS['js_include'][] = 'mootools.js';

/**
 * Defines the url to return to in case of error in a sql statement
 */
// Security checkings
if (! empty($goto)) {
    $is_gotofile     = preg_replace('@^([^?]+).*$@s', '\\1', $goto);
    if (! @file_exists('./' . $is_gotofile)) {
        unset($goto);
    } else {
        $is_gotofile = ($is_gotofile == $goto);
    }
} else {
    $goto = (! strlen($table)) ? $cfg['DefaultTabDatabase'] : $cfg['DefaultTabTable'];
    $is_gotofile  = true;
} // end if

if (!isset($err_url)) {
    $err_url = (!empty($back) ? $back : $goto)
             . '?' . PMA_generate_common_url($db)
             . ((strpos(' ' . $goto, 'db_') != 1 && strlen($table)) ? '&amp;table=' . urlencode($table) : '');
} // end if

// Coming from a bookmark dialog
if (isset($fields['query'])) {
    $sql_query = $fields['query'];
}

// This one is just to fill $db
if (isset($fields['dbase'])) {
    $db = $fields['dbase'];
}

// Default to browse if no query set and we have table
// (needed for browsing from DefaultTabTable)
if (empty($sql_query) && strlen($table) && strlen($db)) {
    require_once './libraries/bookmark.lib.php';
    $book_sql_query = PMA_Bookmark_get($db, '\'' . PMA_sqlAddslashes($table) . '\'',
        'label');

    if (! empty($book_sql_query)) {
        $sql_query = $book_sql_query;
    } else {
        $sql_query = 'SELECT * FROM ' . PMA_backquote($table);
    }
    unset($book_sql_query);

    // set $goto to what will be displayed if query returns 0 rows
    $goto = 'tbl_structure.php';
} else {
    // Now we can check the parameters
    PMA_checkParameters(array('sql_query'));
}

// instead of doing the test twice
$is_drop_database = preg_match('/DROP[[:space:]]+(DATABASE|SCHEMA)[[:space:]]+/i',
    $sql_query);

/**
 * Check rights in case of DROP DATABASE
 *
 * This test may be bypassed if $is_js_confirmed = 1 (already checked with js)
 * but since a malicious user may pass this variable by url/form, we don't take
 * into account this case.
 */
if (!defined('PMA_CHK_DROP')
 && !$cfg['AllowUserDropDatabase']
 && $is_drop_database
 && !$is_superuser) {
    require_once './libraries/header.inc.php';
    PMA_mysqlDie($strNoDropDatabases, '', '', $err_url);
} // end if

require_once './libraries/display_tbl.lib.php';
PMA_displayTable_checkConfigParams();

/**
 * Need to find the real end of rows?
 */
if (isset($find_real_end) && $find_real_end) {
    $unlim_num_rows = PMA_Table::countRecords($db, $table, true, true);
    $_SESSION['userconf']['pos'] = @((ceil($unlim_num_rows / $_SESSION['userconf']['max_rows']) - 1) * $_SESSION['userconf']['max_rows']);
}


/**
 * Bookmark add
 */
if (isset($store_bkm)) {
    PMA_Bookmark_save($fields, (isset($bkm_all_users) && $bkm_all_users == 'true' ? true : false));
    PMA_sendHeaderLocation($cfg['PmaAbsoluteUri'] . $goto);
} // end if

/**
 * Parse and analyze the query
 */
require_once './libraries/parse_analyze.lib.php';

/**
 * Sets or modifies the $goto variable if required
 */
if ($goto == 'sql.php') {
    $is_gotofile = false;
    $goto = 'sql.php?'
          . PMA_generate_common_url($db, $table)
          . '&amp;sql_query=' . urlencode($sql_query);
} // end if


/**
 * Go back to further page if table should not be dropped
 */
if (isset($btnDrop) && $btnDrop == $strNo) {
    if (!empty($back)) {
        $goto = $back;
    }
    if ($is_gotofile) {
        if (strpos($goto, 'db_') === 0 && strlen($table)) {
            $table = '';
        }
        $active_page = $goto;
        require './' . PMA_securePath($goto);
    } else {
        PMA_sendHeaderLocation($cfg['PmaAbsoluteUri'] . str_replace('&amp;', '&', $goto));
    }
    exit();
} // end if


/**
 * Displays the confirm page if required
 *
 * This part of the script is bypassed if $is_js_confirmed = 1 (already checked
 * with js) because possible security issue is not so important here: at most,
 * the confirm message isn't displayed.
 *
 * Also bypassed if only showing php code.or validating a SQL query
 */
if (! $cfg['Confirm'] || isset($_REQUEST['is_js_confirmed']) || isset($btnDrop)
 // if we are coming from a "Create PHP code" or a "Without PHP Code"
 // dialog, we won't execute the query anyway, so don't confirm
 || isset($GLOBALS['show_as_php'])
 || !empty($GLOBALS['validatequery'])) {
    $do_confirm = false;
} else {
    $do_confirm = isset($analyzed_sql[0]['queryflags']['need_confirm']);
}

if ($do_confirm) {
    $stripped_sql_query = $sql_query;
    require_once './libraries/header.inc.php';
    if ($is_drop_database) {
        echo '<h1 class="warning">' . $strDropDatabaseStrongWarning . '</h1>';
    }
    echo '<form action="sql.php" method="post">' . "\n"
        .PMA_generate_common_hidden_inputs($db, $table);
    ?>
    <input type="hidden" name="sql_query" value="<?php echo htmlspecialchars($sql_query); ?>" />
    <input type="hidden" name="zero_rows" value="<?php echo isset($zero_rows) ? PMA_sanitize($zero_rows) : ''; ?>" />
    <input type="hidden" name="goto" value="<?php echo $goto; ?>" />
    <input type="hidden" name="back" value="<?php echo isset($back) ? PMA_sanitize($back) : ''; ?>" />
    <input type="hidden" name="reload" value="<?php echo isset($reload) ? PMA_sanitize($reload) : 0; ?>" />
    <input type="hidden" name="purge" value="<?php echo isset($purge) ? PMA_sanitize($purge) : ''; ?>" />
    <input type="hidden" name="cpurge" value="<?php echo isset($cpurge) ? PMA_sanitize($cpurge) : ''; ?>" />
    <input type="hidden" name="purgekey" value="<?php echo isset($purgekey) ? PMA_sanitize($purgekey) : ''; ?>" />
    <input type="hidden" name="show_query" value="<?php echo isset($show_query) ? PMA_sanitize($show_query) : ''; ?>" />
    <?php
    echo '<fieldset class="confirmation">' . "\n"
        .'    <legend>' . $strDoYouReally . '</legend>'
        .'    <tt>' . htmlspecialchars($stripped_sql_query) . '</tt>' . "\n"
        .'</fieldset>' . "\n"
        .'<fieldset class="tblFooters">' . "\n";
    ?>
    <input type="submit" name="btnDrop" value="<?php echo $strYes; ?>" id="buttonYes" />
    <input type="submit" name="btnDrop" value="<?php echo $strNo; ?>" id="buttonNo" />
    <?php
    echo '</fieldset>' . "\n"
       . '</form>' . "\n";

    /**
     * Displays the footer and exit
     */
    require_once './libraries/footer.inc.php';
} // end if $do_confirm


// Defines some variables
// A table has to be created, renamed, dropped -> navi frame should be reloaded
/**
 * @todo use the parser/analyzer
 */

if (empty($reload)
    && preg_match('/^(CREATE|ALTER|DROP)\s+(VIEW|TABLE|DATABASE|SCHEMA)\s+/i', $sql_query)) {
    $reload = 1;
}

// SK -- Patch: $is_group added for use in calculation of total number of
//              rows.
//              $is_count is changed for more correct "LIMIT" clause
//              appending in queries like
//                "SELECT COUNT(...) FROM ... GROUP BY ..."

/**
 * @todo detect all this with the parser, to avoid problems finding
 * those strings in comments or backquoted identifiers
 */

$is_explain = $is_count = $is_export = $is_delete = $is_insert = $is_affected = $is_show = $is_maint = $is_analyse = $is_group = $is_func = $is_replace = false;
if ($is_select) { // see line 141
    $is_group = preg_match('@(GROUP[[:space:]]+BY|HAVING|SELECT[[:space:]]+DISTINCT)[[:space:]]+@i', $sql_query);
    $is_func =  !$is_group && (preg_match('@[[:space:]]+(SUM|AVG|STD|STDDEV|MIN|MAX|BIT_OR|BIT_AND)\s*\(@i', $sql_query));
    $is_count = !$is_group && (preg_match('@^SELECT[[:space:]]+COUNT\((.*\.+)?.*\)@i', $sql_query));
    $is_export   = (preg_match('@[[:space:]]+INTO[[:space:]]+OUTFILE[[:space:]]+@i', $sql_query));
    $is_analyse  = (preg_match('@[[:space:]]+PROCEDURE[[:space:]]+ANALYSE@i', $sql_query));
} elseif (preg_match('@^EXPLAIN[[:space:]]+@i', $sql_query)) {
    $is_explain  = true;
} elseif (preg_match('@^DELETE[[:space:]]+@i', $sql_query)) {
    $is_delete   = true;
    $is_affected = true;
} elseif (preg_match('@^(INSERT|LOAD[[:space:]]+DATA|REPLACE)[[:space:]]+@i', $sql_query)) {
    $is_insert   = true;
    $is_affected = true;
    if (preg_match('@^(REPLACE)[[:space:]]+@i', $sql_query)) {
        $is_replace = true;
    }
} elseif (preg_match('@^UPDATE[[:space:]]+@i', $sql_query)) {
    $is_affected = true;
} elseif (preg_match('@^[[:space:]]*SHOW[[:space:]]+@i', $sql_query)) {
    $is_show     = true;
} elseif (preg_match('@^(CHECK|ANALYZE|REPAIR|OPTIMIZE)[[:space:]]+TABLE[[:space:]]+@i', $sql_query)) {
    $is_maint    = true;
}

// Do append a "LIMIT" clause?
if ((! $cfg['ShowAll'] || $_SESSION['userconf']['max_rows'] != 'all')
 && ! ($is_count || $is_export || $is_func || $is_analyse)
 && isset($analyzed_sql[0]['queryflags']['select_from'])
 && ! isset($analyzed_sql[0]['queryflags']['offset'])
 && empty($analyzed_sql[0]['limit_clause'])
 ) {
    $sql_limit_to_append = ' LIMIT ' . $_SESSION['userconf']['pos'] . ', ' . $_SESSION['userconf']['max_rows'] . " ";

    $full_sql_query  = $analyzed_sql[0]['section_before_limit'] . "\n" . $sql_limit_to_append . $analyzed_sql[0]['section_after_limit'];
    /**
     * @todo pretty printing of this modified query
     */
    if (isset($display_query)) {
        // if the analysis of the original query revealed that we found
        // a section_after_limit, we now have to analyze $display_query
        // to display it correctly

        if (!empty($analyzed_sql[0]['section_after_limit']) && trim($analyzed_sql[0]['section_after_limit']) != ';') {
            $analyzed_display_query = PMA_SQP_analyze(PMA_SQP_parse($display_query));
            $display_query  = $analyzed_display_query[0]['section_before_limit'] . "\n" . $sql_limit_to_append . $analyzed_display_query[0]['section_after_limit'];
        }
    }

} else {
    $full_sql_query      = $sql_query;
} // end if...else

if (strlen($db)) {
    PMA_DBI_select_db($db);
}

//  E x e c u t e    t h e    q u e r y

// Only if we didn't ask to see the php code (mikebeck)
if (isset($GLOBALS['show_as_php']) || !empty($GLOBALS['validatequery'])) {
    unset($result);
    $num_rows = 0;
} else {
    if (isset($_SESSION['profiling']) && PMA_profilingSupported()) {
        PMA_DBI_query('SET PROFILING=1;');
    }

    // garvin: Measure query time.
    // TODO-Item http://sourceforge.net/tracker/index.php?func=detail&aid=571934&group_id=23067&atid=377411
    $querytime_before = array_sum(explode(' ', microtime()));

    $result   = @PMA_DBI_try_query($full_sql_query, null, PMA_DBI_QUERY_STORE);

    $querytime_after = array_sum(explode(' ', microtime()));

    $GLOBALS['querytime'] = $querytime_after - $querytime_before;

    // Displays an error message if required and stop parsing the script
    if ($error        = PMA_DBI_getError()) {
        if ($is_gotofile) {
            if (strpos($goto, 'db_') === 0 && strlen($table)) {
                $table = '';
            }
            $active_page = $goto;
            $message = PMA_Message::rawError($error);
            require './' . PMA_securePath($goto);
        } else {
            require_once './libraries/header.inc.php';
            $full_err_url = (preg_match('@^(db|tbl)_@', $err_url))
                          ? $err_url . '&amp;show_query=1&amp;sql_query=' . urlencode($sql_query)
                          : $err_url;
            PMA_mysqlDie($error, $full_sql_query, '', $full_err_url);
        }
        exit;
    }
    unset($error);

    // Gets the number of rows affected/returned
    // (This must be done immediately after the query because
    // mysql_affected_rows() reports about the last query done)

    if (!$is_affected) {
        $num_rows = ($result) ? @PMA_DBI_num_rows($result) : 0;
    } elseif (!isset($num_rows)) {
        $num_rows = @PMA_DBI_affected_rows();
    }

    // Grabs the profiling results
    if (isset($_SESSION['profiling']) && PMA_profilingSupported()) {
        $profiling_results = PMA_DBI_fetch_result('SHOW PROFILE;');
    }

    // Checks if the current database has changed
    // This could happen if the user sends a query like "USE `database`;"
    /**
     * commented out auto-switching to active database - really required?
     * bug #1814718 win: table list disappears (mixed case db names)
     * https://sourceforge.net/support/tracker.php?aid=1814718
     * @todo RELEASE test and comit or rollback before release
    $current_db = PMA_DBI_fetch_value('SELECT DATABASE()');
    if ($db !== $current_db) {
        $db     = $current_db;
        $reload = 1;
    }