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Use server_info to fallback from ANY_VALUE if needed

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This commit is contained in:
Alexandre Alapetite 2017-04-15 12:40:32 +02:00
parent d2b3e0daf5
commit 5007be3cf5
1 changed files with 23 additions and 15 deletions
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24
include/dba.php
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@ -20,6 +20,7 @@ class dba {
private $driver;
public $connected = false;
public $error = false;
private $_server_info = '';
function __construct($server, $user, $pass, $db, $install = false) {
$a = get_app();
@ -103,18 +104,20 @@ class dba {
* @return string
*/
public function server_info() {
if ($this->_server_info == '') {
switch ($this->driver) {
case 'pdo':
$version = $this->db->getAttribute(PDO::ATTR_SERVER_VERSION);
$this->_server_info = $this->db->getAttribute(PDO::ATTR_SERVER_VERSION);
break;
case 'mysqli':
$version = $this->db->server_info;
$this->_server_info = $this->db->server_info;
break;
case 'mysql':
$version = mysql_get_server_info($this->db);
$this->_server_info = mysql_get_server_info($this->db);
break;
}
return $version;
}
return $this->_server_info;
}
/**
@ -505,11 +508,16 @@ function dbesc($str) {
}
function any_value_fallback($sql) {
global $db;
$server_info = $db->server_info();
//Considerations for Standard SQL, or MySQL with ONLY_FULL_GROUP_BY (default since 5.7.5).
//ANY_VALUE() is available from MySQL 5.7 https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
//A standard fallback is to use MIN(), or nothing () in old MySQL 5.6-
//TODO: Skip this line when we know we are on a platform supporting ANY_VALUE()
return str_ireplace('ANY_VALUE(', 'MIN(', $sql);
//ANY_VALUE() is available from MySQL 5.7.5 https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
//A standard fallback is to use MIN()
if (version_compare($server_info, '5.7.5', '<') ||
(stripos($server_info, 'MariaDB') !== false)) {
$sql = str_ireplace('ANY_VALUE(', 'MIN(', $sql);
}
return $sql;
}
// Function: q($sql,$args);