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Util.php
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Util.php
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<?php
declare(strict_types=1);
namespace PhpMyAdmin;
use PhpMyAdmin\Dbal\ResultInterface;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Html\MySQLDocumentation;
use PhpMyAdmin\Query\Compatibility;
use PhpMyAdmin\Query\Utilities;
use PhpMyAdmin\SqlParser\Components\Expression;
use PhpMyAdmin\SqlParser\Context;
use PhpMyAdmin\SqlParser\Token;
use PhpMyAdmin\Utils\SessionCache;
use Stringable;
use function __;
use function _pgettext;
use function abs;
use function array_key_exists;
use function array_map;
use function array_merge;
use function array_shift;
use function array_unique;
use function basename;
use function bin2hex;
use function chr;
use function count;
use function ctype_digit;
use function date;
use function decbin;
use function explode;
use function extension_loaded;
use function fclose;
use function floatval;
use function floor;
use function fread;
use function function_exists;
use function html_entity_decode;
use function htmlentities;
use function htmlspecialchars;
use function htmlspecialchars_decode;
use function implode;
use function in_array;
use function ini_get;
use function is_array;
use function is_callable;
use function is_object;
use function is_scalar;
use function is_string;
use function log10;
use function mb_detect_encoding;
use function mb_strlen;
use function mb_strpos;
use function mb_strrpos;
use function mb_strstr;
use function mb_strtolower;
use function mb_substr;
use function number_format;
use function ord;
use function parse_url;
use function preg_match;
use function preg_quote;
use function preg_replace;
use function random_bytes;
use function range;
use function reset;
use function round;
use function rtrim;
use function set_time_limit;
use function sort;
use function sprintf;
use function str_contains;
use function str_pad;
use function str_replace;
use function strcasecmp;
use function strftime;
use function strlen;
use function strrev;
use function strtolower;
use function strtr;
use function substr;
use function time;
use function trim;
use function uksort;
use const ENT_COMPAT;
use const ENT_QUOTES;
use const PHP_INT_SIZE;
use const PHP_MAJOR_VERSION;
use const STR_PAD_LEFT;
/**
* Misc functions used all over the scripts.
*/
class Util
{
/**
* Checks whether configuration value tells to show icons.
*
* @param string $value Configuration option name
*/
public static function showIcons($value): bool
{
return in_array($GLOBALS['cfg'][$value], ['icons', 'both']);
}
/**
* Checks whether configuration value tells to show text.
*
* @param string $value Configuration option name
*/
public static function showText($value): bool
{
return in_array($GLOBALS['cfg'][$value], ['text', 'both']);
}
/**
* Returns the formatted maximum size for an upload
*
* @param int|float|string $maxUploadSize the size
*
* @return string the message
*/
public static function getFormattedMaximumUploadSize($maxUploadSize): string
{
// I have to reduce the second parameter (sensitiveness) from 6 to 4
// to avoid weird results like 512 kKib
[$maxSize, $maxUnit] = self::formatByteDown($maxUploadSize, 4);
return '(' . sprintf(__('Max: %s%s'), $maxSize, $maxUnit) . ')';
}
/**
* Add slashes before "_" and "%" characters for using them in MySQL
* database, table and field names.
* Note: This function does not escape backslashes!
*
* @param string $name the string to escape
*
* @return string the escaped string
*/
public static function escapeMysqlWildcards($name): string
{
return strtr($name, ['_' => '\\_', '%' => '\\%']);
}
/**
* removes slashes before "_" and "%" characters
* Note: This function does not unescape backslashes!
*
* @param string $name the string to escape
*
* @return string the escaped string
*/
public static function unescapeMysqlWildcards($name): string
{
return strtr($name, ['\\_' => '_', '\\%' => '%']);
}
/**
* removes quotes (',",`) from a quoted string
*
* checks if the string is quoted and removes this quotes
*
* @param string $quotedString string to remove quotes from
* @param string $quote type of quote to remove
*
* @return string unquoted string
*/
public static function unQuote(string $quotedString, ?string $quote = null): string
{
$quotes = [];
if ($quote === null) {
$quotes[] = '`';
$quotes[] = '"';
$quotes[] = "'";
} else {
$quotes[] = $quote;
}
foreach ($quotes as $quote) {
if (mb_substr($quotedString, 0, 1) === $quote && mb_substr($quotedString, -1, 1) === $quote) {
$unquotedString = mb_substr($quotedString, 1, -1);
// replace escaped quotes
$unquotedString = str_replace($quote . $quote, $quote, $unquotedString);
return $unquotedString;
}
}
return $quotedString;
}
/**
* Get a URL link to the official MySQL documentation
*
* @param string $link contains name of page/anchor that is being linked
* @param string $anchor anchor to page part
*
* @return string the URL link
*/
public static function getMySQLDocuURL(string $link, string $anchor = ''): string
{
global $dbi;
// Fixup for newly used names:
$link = str_replace('_', '-', mb_strtolower($link));
if (empty($link)) {
$link = 'index';
}
$mysql = '5.5';
$lang = 'en';
if (isset($dbi)) {
$serverVersion = $dbi->getVersion();
if ($serverVersion >= 80000) {
$mysql = '8.0';
} elseif ($serverVersion >= 50700) {
$mysql = '5.7';
} elseif ($serverVersion >= 50600) {
$mysql = '5.6';
} elseif ($serverVersion >= 50500) {
$mysql = '5.5';
}
}
$url = 'https://dev.mysql.com/doc/refman/'
. $mysql . '/' . $lang . '/' . $link . '.html';
if (! empty($anchor)) {
$url .= '#' . $anchor;
}
return Core::linkURL($url);
}
/**
* Get a URL link to the official documentation page of either MySQL
* or MariaDB depending on the database server
* of the user.
*
* @param bool $isMariaDB if the database server is MariaDB
*
* @return string The URL link
*/
public static function getDocuURL(bool $isMariaDB = false): string
{
if ($isMariaDB) {
$url = 'https://mariadb.com/kb/en/documentation/';
return Core::linkURL($url);
}
return self::getMySQLDocuURL('');
}
/**
* Check the correct row count
*
* @param string $db the db name
* @param array $table the table infos
*
* @return int the possibly modified row count
*/
private static function checkRowCount($db, array $table)
{
global $dbi;
$rowCount = 0;
if ($table['Rows'] === null) {
// Do not check exact row count here,
// if row count is invalid possibly the table is defect
// and this would break the navigation panel;
// but we can check row count if this is a view or the
// information_schema database
// since Table::countRecords() returns a limited row count
// in this case.
// set this because Table::countRecords() can use it
$tableIsView = $table['TABLE_TYPE'] === 'VIEW';
if ($tableIsView || Utilities::isSystemSchema($db)) {
$rowCount = $dbi
->getTable($db, $table['Name'])
->countRecords();
}
}
return $rowCount;
}
/**
* returns array with tables of given db with extended information and grouped
*
* @param string $db
*
* @return array (recursive) grouped table list
*/
public static function getTableList($db): array
{
global $dbi;
$sep = $GLOBALS['cfg']['NavigationTreeTableSeparator'];
$tables = $dbi->getTablesFull($db);
if ($GLOBALS['cfg']['NaturalOrder']) {
uksort($tables, 'strnatcasecmp');
}
if (count($tables) < 1) {
return $tables;
}
$default = [
'Name' => '',
'Rows' => 0,
'Comment' => '',
'disp_name' => '',
];
$tableGroups = [];
foreach ($tables as $table) {
/** @var string $tableName */
$tableName = $table['TABLE_NAME'];
$table['Rows'] = self::checkRowCount($db, $table);
// in $group we save the reference to the place in $table_groups
// where to store the table info
if ($GLOBALS['cfg']['NavigationTreeEnableGrouping'] && $sep && mb_strstr($tableName, $sep)) {
$parts = explode($sep, $tableName);
$group =& $tableGroups;
$i = 0;
$groupNameFull = '';
$partsCount = count($parts) - 1;
while (($i < $partsCount) && ($i < $GLOBALS['cfg']['NavigationTreeTableLevel'])) {
$groupName = $parts[$i] . $sep;
$groupNameFull .= $groupName;
if (! isset($group[$groupName])) {
$group[$groupName] = [];
$group[$groupName]['is' . $sep . 'group'] = true;
$group[$groupName]['tab' . $sep . 'count'] = 1;
$group[$groupName]['tab' . $sep . 'group'] = $groupNameFull;
} elseif (! isset($group[$groupName]['is' . $sep . 'group'])) {
$table = $group[$groupName];
$group[$groupName] = [];
$group[$groupName][$groupName] = $table;
$group[$groupName]['is' . $sep . 'group'] = true;
$group[$groupName]['tab' . $sep . 'count'] = 1;
$group[$groupName]['tab' . $sep . 'group'] = $groupNameFull;
} else {
$group[$groupName]['tab' . $sep . 'count']++;
}
$group =& $group[$groupName];
$i++;
}
} else {
if (! isset($tableGroups[$tableName])) {
$tableGroups[$tableName] = [];
}
$group =& $tableGroups;
}
$table['disp_name'] = $table['Name'];
$group[$tableName] = array_merge($default, $table);
}
return $tableGroups;
}
/* ----------------------- Set of misc functions ----------------------- */
/**
* Adds backquotes on both sides of a database, table or field name.
* and escapes backquotes inside the name with another backquote
*
* example:
* <code>
* echo backquote('owner`s db'); // `owner``s db`
*
* </code>
*
* @param Stringable|string|null $identifier the database, table or field name to "backquote"
*/
public static function backquote($identifier): string
{
return static::backquoteCompat($identifier, 'NONE', true);
}
/**
* Adds backquotes on both sides of a database, table or field name.
* in compatibility mode
*
* example:
* <code>
* echo backquoteCompat('owner`s db'); // `owner``s db`
*
* </code>
*
* @param Stringable|string|null $identifier the database, table or field name to "backquote"
* @param string $compatibility string compatibility mode (used by dump functions)
* @param bool|null $doIt a flag to bypass this function (used by dump functions)
*/
public static function backquoteCompat(
$identifier,
string $compatibility = 'MSSQL',
$doIt = true
): string {
$identifier = (string) $identifier;
if ($identifier === '' || $identifier === '*') {
return $identifier;
}
if (! $doIt && ! ((int) Context::isKeyword($identifier) & Token::FLAG_KEYWORD_RESERVED)) {
return $identifier;
}
$quote = '`';
$escapeChar = '`';
if ($compatibility === 'MSSQL') {
$quote = '"';
$escapeChar = '\\';
}
return $quote . str_replace($quote, $escapeChar . $quote, $identifier) . $quote;
}
/**
* Formats $value to byte view
*
* @param float|int|string|null $value the value to format
* @param int $limes the sensitiveness
* @param int $comma the number of decimals to retain
*
* @return array|null the formatted value and its unit
*/
public static function formatByteDown($value, $limes = 6, $comma = 0): ?array
{
if ($value === null) {
return null;
}
if (is_string($value)) {
$value = (float) $value;
}
$byteUnits = [
/* l10n: shortcuts for Byte */
__('B'),
/* l10n: shortcuts for Kilobyte */
__('KiB'),
/* l10n: shortcuts for Megabyte */
__('MiB'),
/* l10n: shortcuts for Gigabyte */
__('GiB'),
/* l10n: shortcuts for Terabyte */
__('TiB'),
/* l10n: shortcuts for Petabyte */
__('PiB'),
/* l10n: shortcuts for Exabyte */
__('EiB'),
];
$dh = 10 ** $comma;
$li = 10 ** $limes;
$unit = $byteUnits[0];
for ($d = 6, $ex = 15; $d >= 1; $d--, $ex -= 3) {
$unitSize = $li * 10 ** $ex;
if (isset($byteUnits[$d]) && $value >= $unitSize) {
// use 1024.0 to avoid integer overflow on 64-bit machines
$value = round($value / (1024 ** $d / $dh)) / $dh;
$unit = $byteUnits[$d];
break 1;
}
}
if ($unit != $byteUnits[0]) {
// if the unit is not bytes (as represented in current language)
// reformat with max length of 5
// 4th parameter=true means do not reformat if value < 1
$returnValue = self::formatNumber($value, 5, $comma, true, false);
} else {
// do not reformat, just handle the locale
$returnValue = self::formatNumber($value, 0);
}
return [
trim($returnValue),
$unit,
];
}
/**
* Formats $value to the given length and appends SI prefixes
* with a $length of 0 no truncation occurs, number is only formatted
* to the current locale
*
* examples:
* <code>
* echo formatNumber(123456789, 6); // 123,457 k
* echo formatNumber(-123456789, 4, 2); // -123.46 M
* echo formatNumber(-0.003, 6); // -3 m
* echo formatNumber(0.003, 3, 3); // 0.003
* echo formatNumber(0.00003, 3, 2); // 0.03 m
* echo formatNumber(0, 6); // 0
* </code>
*
* @param float|int|string $value the value to format
* @param int $digitsLeft number of digits left of the comma
* @param int $digitsRight number of digits right of the comma
* @param bool $onlyDown do not reformat numbers below 1
* @param bool $noTrailingZero removes trailing zeros right of the comma (default: true)
*
* @return string the formatted value and its unit
*/
public static function formatNumber(
$value,
$digitsLeft = 3,
$digitsRight = 0,
$onlyDown = false,
$noTrailingZero = true
) {
if ($value == 0) {
return '0';
}
if (is_string($value)) {
$value = (float) $value;
}
$originalValue = $value;
//number_format is not multibyte safe, str_replace is safe
if ($digitsLeft === 0) {
$value = number_format(
(float) $value,
$digitsRight,
/* l10n: Decimal separator */
__('.'),
/* l10n: Thousands separator */
__(',')
);
if (($originalValue != 0) && (floatval($value) == 0)) {
$value = ' <' . (1 / 10 ** $digitsRight);
}
return $value;
}
// this units needs no translation, ISO
$units = [
-8 => 'y',
-7 => 'z',
-6 => 'a',
-5 => 'f',
-4 => 'p',
-3 => 'n',
-2 => 'µ',
-1 => 'm',
0 => ' ',
1 => 'k',
2 => 'M',
3 => 'G',
4 => 'T',
5 => 'P',
6 => 'E',
7 => 'Z',
8 => 'Y',
];
/* l10n: Decimal separator */
$decimalSep = __('.');
/* l10n: Thousands separator */
$thousandsSep = __(',');
// check for negative value to retain sign
if ($value < 0) {
$sign = '-';
$value = abs($value);
} else {
$sign = '';
}
$dh = 10 ** $digitsRight;
/*
* This gives us the right SI prefix already,
* but $digits_left parameter not incorporated
*/
$d = floor(log10((float) $value) / 3);
/*
* Lowering the SI prefix by 1 gives us an additional 3 zeros
* So if we have 3,6,9,12.. free digits ($digits_left - $cur_digits)
* to use, then lower the SI prefix
*/
$curDigits = floor(log10($value / 1000 ** $d) + 1);
if ($digitsLeft > $curDigits) {
$d -= floor(($digitsLeft - $curDigits) / 3);
}
if ($d < 0 && $onlyDown) {
$d = 0;
}
$value = round($value / (1000 ** $d / $dh)) / $dh;
$unit = $units[$d];
// number_format is not multibyte safe, str_replace is safe
$formattedValue = number_format($value, $digitsRight, $decimalSep, $thousandsSep);
// If we don't want any zeros, remove them now
if ($noTrailingZero && str_contains($formattedValue, $decimalSep)) {
$formattedValue = preg_replace('/' . preg_quote($decimalSep, '/') . '?0+$/', '', $formattedValue);
}
if ($originalValue != 0 && floatval($value) == 0) {
return ' <' . number_format(1 / 10 ** $digitsRight, $digitsRight, $decimalSep, $thousandsSep) . ' ' . $unit;
}
return $sign . $formattedValue . ' ' . $unit;
}
/**
* Returns the number of bytes when a formatted size is given
*
* @param string|int $formattedSize the size expression (for example 8MB)
*
* @return int|float The numerical part of the expression (for example 8)
*/
public static function extractValueFromFormattedSize($formattedSize)
{
$returnValue = -1;
$formattedSize = (string) $formattedSize;
if (preg_match('/^[0-9]+GB$/', $formattedSize)) {
$returnValue = (int) mb_substr($formattedSize, 0, -2) * 1024 ** 3;
} elseif (preg_match('/^[0-9]+MB$/', $formattedSize)) {
$returnValue = (int) mb_substr($formattedSize, 0, -2) * 1024 ** 2;
} elseif (preg_match('/^[0-9]+K$/', $formattedSize)) {
$returnValue = (int) mb_substr($formattedSize, 0, -1) * 1024 ** 1;
}
return $returnValue;
}
/**
* Writes localised date
*
* @param int $timestamp the current timestamp
* @param string $format format
*
* @return string the formatted date
*/
public static function localisedDate($timestamp = -1, $format = '')
{
$month = [
/* l10n: Short month name */
__('Jan'),
/* l10n: Short month name */
__('Feb'),
/* l10n: Short month name */
__('Mar'),
/* l10n: Short month name */
__('Apr'),
/* l10n: Short month name */
_pgettext('Short month name', 'May'),
/* l10n: Short month name */
__('Jun'),
/* l10n: Short month name */
__('Jul'),
/* l10n: Short month name */
__('Aug'),
/* l10n: Short month name */
__('Sep'),
/* l10n: Short month name */
__('Oct'),
/* l10n: Short month name */
__('Nov'),
/* l10n: Short month name */
__('Dec'),
];
$dayOfWeek = [
/* l10n: Short week day name for Sunday */
_pgettext('Short week day name for Sunday', 'Sun'),
/* l10n: Short week day name for Monday */
__('Mon'),
/* l10n: Short week day name for Tuesday */
__('Tue'),
/* l10n: Short week day name for Wednesday */
__('Wed'),
/* l10n: Short week day name for Thursday */
__('Thu'),
/* l10n: Short week day name for Friday */
__('Fri'),
/* l10n: Short week day name for Saturday */
__('Sat'),
];
if ($format == '') {
/* l10n: See https://www.php.net/manual/en/function.strftime.php */
$format = __('%B %d, %Y at %I:%M %p');
}
if ($timestamp == -1) {
$timestamp = time();
}
$date = (string) preg_replace(
'@%[aA]@',
$dayOfWeek[(int) @strftime('%w', (int) $timestamp)],
$format
);
$date = (string) preg_replace(
'@%[bB]@',
$month[(int) @strftime('%m', (int) $timestamp) - 1],
$date
);
/* Fill in AM/PM */
$hours = (int) date('H', (int) $timestamp);
if ($hours >= 12) {
$amPm = _pgettext('AM/PM indication in time', 'PM');
} else {
$amPm = _pgettext('AM/PM indication in time', 'AM');
}
$date = (string) preg_replace('@%[pP]@', $amPm, $date);
// Can return false on windows for Japanese language
// See https://github.com/phpmyadmin/phpmyadmin/issues/15830
$ret = @strftime($date, (int) $timestamp);
// Some OSes such as Win8.1 Traditional Chinese version did not produce UTF-8
// output here. See https://github.com/phpmyadmin/phpmyadmin/issues/10598
if ($ret === false || mb_detect_encoding($ret, 'UTF-8', true) !== 'UTF-8') {
$ret = date('Y-m-d H:i:s', (int) $timestamp);
}
return $ret;
}
/**
* Splits a URL string by parameter
*
* @param string $url the URL
*
* @return array<int, string> the parameter/value pairs, for example [0] db=sakila
*/
public static function splitURLQuery($url): array
{
// decode encoded url separators
$separator = Url::getArgSeparator();
// on most places separator is still hard coded ...
if ($separator !== '&') {
// ... so always replace & with $separator
$url = str_replace([htmlentities('&'), '&'], [$separator, $separator], $url);
}
$url = str_replace(htmlentities($separator), $separator, $url);
// end decode
$urlParts = parse_url($url);
if (is_array($urlParts) && isset($urlParts['query']) && strlen($separator) > 0) {
return explode($separator, $urlParts['query']);
}
return [];
}
/**
* Returns a given timespan value in a readable format.
*
* @param int $seconds the timespan
*
* @return string the formatted value
*/
public static function timespanFormat($seconds): string
{
$days = floor($seconds / 86400);
if ($days > 0) {
$seconds -= $days * 86400;
}
$hours = floor($seconds / 3600);
if ($days > 0 || $hours > 0) {
$seconds -= $hours * 3600;
}
$minutes = floor($seconds / 60);
if ($days > 0 || $hours > 0 || $minutes > 0) {
$seconds -= $minutes * 60;
}
return sprintf(
__('%s days, %s hours, %s minutes and %s seconds'),
(string) $days,
(string) $hours,
(string) $minutes,
(string) $seconds
);
}
/**
* Function added to avoid path disclosures.
* Called by each script that needs parameters, it displays
* an error message and, by default, stops the execution.
*
* @param string[] $params The names of the parameters needed by the calling
* script
* @param bool $request Check parameters in request
*/
public static function checkParameters($params, $request = false): void
{
$reportedScriptName = basename($GLOBALS['PMA_PHP_SELF']);
$foundError = false;
$errorMessage = '';
if ($request) {
$array = $_REQUEST;
} else {
$array = $GLOBALS;
}
foreach ($params as $param) {
if (isset($array[$param])) {
continue;
}
$errorMessage .= $reportedScriptName
. ': ' . __('Missing parameter:') . ' '
. $param
. MySQLDocumentation::showDocumentation('faq', 'faqmissingparameters', true)
. '[br]';
$foundError = true;
}
if (! $foundError) {
return;
}
Core::fatalError($errorMessage);
}
/**
* Build a condition and with a value
*
* @param string|int|float|null $row The row value
* @param FieldMetadata $meta The field metadata
* @param int $fieldsCount A number of fields
* @param string $conditionKey A key used for BINARY fields functions
* @param string $condition The condition
*
* @return array<int,string|null>
* @psalm-return array{string|null, string}
*/
private static function getConditionValue(
$row,
FieldMetadata $meta,
int $fieldsCount,
string $conditionKey,
string $condition
): array {
global $dbi;
if ($row === null) {
return ['IS NULL', $condition];
}
$conditionValue = '';
$isBinaryString = $meta->isType(FieldMetadata::TYPE_STRING) && $meta->isBinary();
// 63 is the binary charset, see: https://dev.mysql.com/doc/internals/en/charsets.html
$isBlobAndIsBinaryCharset = $meta->isType(FieldMetadata::TYPE_BLOB) && $meta->charsetnr === 63;
if ($meta->isNumeric) {
$conditionValue = '= ' . $row;
} elseif ($isBlobAndIsBinaryCharset || (! empty($row) && $isBinaryString)) {
// hexify only if this is a true not empty BLOB or a BINARY
// do not waste memory building a too big condition
$rowLength = mb_strlen((string) $row);
if ($rowLength > 0 && $rowLength < 1000) {
// use a CAST if possible, to avoid problems
// if the field contains wildcard characters % or _
$conditionValue = '= CAST(0x' . bin2hex((string) $row) . ' AS BINARY)';
} elseif ($fieldsCount === 1) {
// when this blob is the only field present
// try settling with length comparison
$condition = ' CHAR_LENGTH(' . $conditionKey . ') ';
$conditionValue = ' = ' . $rowLength;
} else {
// this blob won't be part of the final condition
$conditionValue = null;
}
} elseif ($meta->isMappedTypeGeometry && ! empty($row)) {
// do not build a too big condition
if (mb_strlen((string) $row) < 5000) {
$condition .= '= CAST(0x' . bin2hex((string) $row) . ' AS BINARY)';
} else {
$condition = '';
}
} elseif ($meta->isMappedTypeBit) {
$conditionValue = "= b'"
. self::printableBitValue((int) $row, (int) $meta->length) . "'";
} else {
$conditionValue = '= \''
. $dbi->escapeString((string) $row) . '\'';
}
return [$conditionValue, $condition];
}
/**
* Function to generate unique condition for specified row.
*
* @param int $fieldsCount number of fields
* @param FieldMetadata[] $fieldsMeta meta information about fields
* @param array $row current row
* @param bool $forceUnique generate condition only on pk or unique
* @param string|bool $restrictToTable restrict the unique condition to this table or false if none
* @param Expression[] $expressions An array of Expression instances.
* @psalm-param array<int, mixed> $row
*
* @return array the calculated condition and whether condition is unique
*/
public static function getUniqueCondition(
$fieldsCount,
array $fieldsMeta,
array $row,
$forceUnique = false,
$restrictToTable = false,
array $expressions = []
): array {
global $dbi;
$primaryKey = '';
$uniqueKey = '';
$nonPrimaryCondition = '';
$preferredCondition = '';
$primaryKeyArray = [];
$uniqueKeyArray = [];
$nonPrimaryConditionArray = [];
$conditionArray = [];
for ($i = 0; $i < $fieldsCount; ++$i) {
$meta = $fieldsMeta[$i];
// do not use a column alias in a condition
if ($meta->orgname === '') {
$meta->orgname = $meta->name;
foreach ($expressions as $expression) {
if (empty($expression->alias) || empty($expression->column)) {
continue;
}
if (strcasecmp($meta->name, $expression->alias) == 0) {
$meta->orgname = $expression->column;
break;
}
}
}
// Do not use a table alias in a condition.
// Test case is:
// select * from galerie x WHERE
//(select count(*) from galerie y where y.datum=x.datum)>1
//
// But orgtable is present only with mysqli extension so the
// fix is only for mysqli.
// Also, do not use the original table name if we are dealing with
// a view because this view might be updatable.
// (The isView() verification should not be costly in most cases
// because there is some caching in the function).
if (
$meta->table !== $meta->orgtable
&& ! $dbi->getTable($GLOBALS['db'], $meta->table)->isView()
) {
$meta->table = $meta->orgtable;
}
// If this field is not from the table which the unique clause needs
// to be restricted to.
if ($restrictToTable && $restrictToTable != $meta->table) {
continue;
}
// to fix the bug where float fields (primary or not)
// can't be matched because of the imprecision of
// floating comparison, use CONCAT
// (also, the syntax "CONCAT(field) IS NULL"
// that we need on the next "if" will work)
if ($meta->isType(FieldMetadata::TYPE_REAL)) {
$conKey = 'CONCAT(' . self::backquote($meta->table) . '.'