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<?php
declare(strict_types=1);
namespace PhpMyAdmin\Query;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Util;
use function in_array;
use function is_string;
use function strlen;
use function strpos;
use function strtoupper;
use function substr;
/**
* Handles data compatibility from SQL query results
*/
class Compatibility
{
public static function getISCompatForGetTablesFull(array $eachTables, string $eachDatabase): array
{
foreach ($eachTables as $table_name => $_) {
if (! isset($eachTables[$table_name]['Type']) && isset($eachTables[$table_name]['Engine'])) {
// pma BC, same parts of PMA still uses 'Type'
$eachTables[$table_name]['Type'] =& $eachTables[$table_name]['Engine'];
} elseif (! isset($eachTables[$table_name]['Engine']) && isset($eachTables[$table_name]['Type'])) {
// old MySQL reports Type, newer MySQL reports Engine
$eachTables[$table_name]['Engine'] =& $eachTables[$table_name]['Type'];
}
// Compatibility with INFORMATION_SCHEMA output
$eachTables[$table_name]['TABLE_SCHEMA'] = $eachDatabase;
$eachTables[$table_name]['TABLE_NAME'] =& $eachTables[$table_name]['Name'];
$eachTables[$table_name]['ENGINE'] =& $eachTables[$table_name]['Engine'];
$eachTables[$table_name]['VERSION'] =& $eachTables[$table_name]['Version'];
$eachTables[$table_name]['ROW_FORMAT'] =& $eachTables[$table_name]['Row_format'];
$eachTables[$table_name]['TABLE_ROWS'] =& $eachTables[$table_name]['Rows'];
$eachTables[$table_name]['AVG_ROW_LENGTH'] =& $eachTables[$table_name]['Avg_row_length'];
$eachTables[$table_name]['DATA_LENGTH'] =& $eachTables[$table_name]['Data_length'];
$eachTables[$table_name]['MAX_DATA_LENGTH'] =& $eachTables[$table_name]['Max_data_length'];
$eachTables[$table_name]['INDEX_LENGTH'] =& $eachTables[$table_name]['Index_length'];
$eachTables[$table_name]['DATA_FREE'] =& $eachTables[$table_name]['Data_free'];
$eachTables[$table_name]['AUTO_INCREMENT'] =& $eachTables[$table_name]['Auto_increment'];
$eachTables[$table_name]['CREATE_TIME'] =& $eachTables[$table_name]['Create_time'];
$eachTables[$table_name]['UPDATE_TIME'] =& $eachTables[$table_name]['Update_time'];
$eachTables[$table_name]['CHECK_TIME'] =& $eachTables[$table_name]['Check_time'];
$eachTables[$table_name]['TABLE_COLLATION'] =& $eachTables[$table_name]['Collation'];
$eachTables[$table_name]['CHECKSUM'] =& $eachTables[$table_name]['Checksum'];
$eachTables[$table_name]['CREATE_OPTIONS'] =& $eachTables[$table_name]['Create_options'];
$eachTables[$table_name]['TABLE_COMMENT'] =& $eachTables[$table_name]['Comment'];
if (
strtoupper($eachTables[$table_name]['Comment'] ?? '') === 'VIEW'
&& $eachTables[$table_name]['Engine'] == null
) {
$eachTables[$table_name]['TABLE_TYPE'] = 'VIEW';
} elseif ($eachDatabase === 'information_schema') {
$eachTables[$table_name]['TABLE_TYPE'] = 'SYSTEM VIEW';
} else {
/**
* @todo difference between 'TEMPORARY' and 'BASE TABLE'
* but how to detect?
*/
$eachTables[$table_name]['TABLE_TYPE'] = 'BASE TABLE';
}
}
return $eachTables;
}
public static function getISCompatForGetColumnsFull(array $columns, string $database, string $table): array
{
$ordinal_position = 1;
foreach ($columns as $column_name => $_) {
// Compatibility with INFORMATION_SCHEMA output
$columns[$column_name]['COLUMN_NAME'] =& $columns[$column_name]['Field'];
$columns[$column_name]['COLUMN_TYPE'] =& $columns[$column_name]['Type'];
$columns[$column_name]['COLLATION_NAME'] =& $columns[$column_name]['Collation'];
$columns[$column_name]['IS_NULLABLE'] =& $columns[$column_name]['Null'];
$columns[$column_name]['COLUMN_KEY'] =& $columns[$column_name]['Key'];
$columns[$column_name]['COLUMN_DEFAULT'] =& $columns[$column_name]['Default'];
$columns[$column_name]['EXTRA'] =& $columns[$column_name]['Extra'];
$columns[$column_name]['PRIVILEGES'] =& $columns[$column_name]['Privileges'];
$columns[$column_name]['COLUMN_COMMENT'] =& $columns[$column_name]['Comment'];
$columns[$column_name]['TABLE_CATALOG'] = null;
$columns[$column_name]['TABLE_SCHEMA'] = $database;
$columns[$column_name]['TABLE_NAME'] = $table;
$columns[$column_name]['ORDINAL_POSITION'] = $ordinal_position;
$colType = $columns[$column_name]['COLUMN_TYPE'];
$colType = is_string($colType) ? $colType : '';
$colTypePosComa = strpos($colType, '(');
$colTypePosComa = $colTypePosComa !== false ? $colTypePosComa : strlen($colType);
$columns[$column_name]['DATA_TYPE'] = substr($colType, 0, $colTypePosComa);
/**
* @todo guess CHARACTER_MAXIMUM_LENGTH from COLUMN_TYPE
*/
$columns[$column_name]['CHARACTER_MAXIMUM_LENGTH'] = null;
/**
* @todo guess CHARACTER_OCTET_LENGTH from CHARACTER_MAXIMUM_LENGTH
*/
$columns[$column_name]['CHARACTER_OCTET_LENGTH'] = null;
$columns[$column_name]['NUMERIC_PRECISION'] = null;
$columns[$column_name]['NUMERIC_SCALE'] = null;
$colCollation = $columns[$column_name]['COLLATION_NAME'];
$colCollation = is_string($colCollation) ? $colCollation : '';
$colCollationPosUnderscore = strpos($colCollation, '_');
$colCollationPosUnderscore = $colCollationPosUnderscore !== false
? $colCollationPosUnderscore
: strlen($colCollation);
$columns[$column_name]['CHARACTER_SET_NAME'] = substr($colCollation, 0, $colCollationPosUnderscore);
$ordinal_position++;
}
return $columns;
}
public static function isMySqlOrPerconaDb(): bool
{
$serverType = Util::getServerType();
return $serverType === 'MySQL' || $serverType === 'Percona Server';
}
public static function isMariaDb(): bool
{
$serverType = Util::getServerType();
return $serverType === 'MariaDB';
}
public static function isCompatibleRenameIndex(int $serverVersion): bool
{
if (self::isMySqlOrPerconaDb()) {
return $serverVersion >= 50700;
}
// @see https://mariadb.com/kb/en/alter-table/#rename-indexkey
if (self::isMariaDb()) {
return $serverVersion >= 100502;
}
return false;
}
public static function isIntegersLengthRestricted(DatabaseInterface $dbi): bool
{
// MySQL made restrictions on the integer types' length from versions >= 8.0.18
// See: https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-19.html
$serverType = Util::getServerType();
$serverVersion = $dbi->getVersion();
return $serverType === 'MySQL' && $serverVersion >= 80018;
}
public static function supportsReferencesPrivilege(DatabaseInterface $dbi): bool
{
// See: https://mariadb.com/kb/en/grant/#table-privileges
// Unused
if ($dbi->isMariaDB()) {
return false;
}
// https://dev.mysql.com/doc/refman/5.6/en/privileges-provided.html#priv_references
// This privilege is unused before MySQL 5.6.22.
// As of 5.6.22, creation of a foreign key constraint
// requires at least one of the SELECT, INSERT, UPDATE, DELETE,
// or REFERENCES privileges for the parent table.
return $dbi->getVersion() >= 50622;
}
public static function isIntegersSupportLength(string $type, string $length, DatabaseInterface $dbi): bool
{
// MySQL Removed the Integer types' length from versions >= 8.0.18
// except TINYINT(1).
// See: https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-19.html
$integerTypes = ['SMALLINT', 'MEDIUMINT', 'INT', 'BIGINT'];
$typeLengthNotAllowed = in_array($type, $integerTypes) || $type === 'TINYINT' && $length !== '1';
return ! (self::isIntegersLengthRestricted($dbi) && $typeLengthNotAllowed);
}
/**
* Returns whether the database server supports virtual columns
*/
public static function isVirtualColumnsSupported(int $serverVersion): bool
{
if (self::isMySqlOrPerconaDb()) {
return $serverVersion >= 50705;
}
// @see https://daniel-bartholomew.com/2010/09/30/road-to-mariadb-5-2-virtual-columns/
if (self::isMariaDb()) {
return $serverVersion >= 50200;
}
return false;
}
/**
* Returns whether the database server supports virtual columns
*/
public static function supportsStoredKeywordForVirtualColumns(int $serverVersion): bool
{
// @see https://mariadb.com/kb/en/generated-columns/#mysql-compatibility-support
if (self::isMariaDb()) {
return $serverVersion >= 100201;
}
return false;
}
/**
* @see https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-6.html#mysqld-5-7-6-account-management
* @see https://mariadb.com/kb/en/mariadb-1042-release-notes/#notable-changes
*
* @psalm-pure
*/
public static function hasAccountLocking(bool $isMariaDb, int $version): bool
{
return $isMariaDb && $version >= 100402 || ! $isMariaDb && $version >= 50706;
}
}
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