<?php
+use Friendica\App;
use Friendica\Core\L10n;
use Friendica\Core\System;
use Friendica\Database\DBM;
use Friendica\Database\DBStructure;
use Friendica\Util\DateTimeFormat;
-require_once('include/datetime.php');
-
/**
* @class MySQL database class
*
*/
class dba {
- public static $connected = true;
+ public static $connected = false;
private static $_server_info = '';
private static $db;
private static $errorno = 0;
private static $affected_rows = 0;
private static $in_transaction = false;
+ private static $in_retrial = false;
private static $relation = [];
+ private static $db_serveraddr = '';
+ private static $db_user = '';
+ private static $db_pass = '';
+ private static $db_name = '';
- public static function connect($serveraddr, $user, $pass, $db, $install = false) {
- if (!is_null(self::$db)) {
+ public static function connect($serveraddr, $user, $pass, $db) {
+ if (!is_null(self::$db) && self::connected()) {
return true;
}
$stamp1 = microtime(true);
+ // We are storing these values for being able to perform a reconnect
+ self::$db_serveraddr = $serveraddr;
+ self::$db_user = $user;
+ self::$db_pass = $pass;
+ self::$db_name = $db;
+
$serveraddr = trim($serveraddr);
$serverdata = explode(':', $serveraddr);
$db = trim($db);
if (!(strlen($server) && strlen($user))) {
- self::$connected = false;
- self::$db = null;
return false;
}
- if ($install) {
- if (strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) {
- if (! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
- self::$error = L10n::t('Cannot locate DNS info for database server \'%s\'', $server);
- self::$connected = false;
- self::$db = null;
- return false;
- }
- }
- }
-
if (class_exists('\PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
self::$driver = 'pdo';
$connect = "mysql:host=".$server.";dbname=".$db;
self::$db = @new PDO($connect, $user, $pass);
self::$connected = true;
} catch (PDOException $e) {
- self::$connected = false;
}
}
// No suitable SQL driver was found.
if (!self::$connected) {
+ self::$driver = null;
self::$db = null;
- if (!$install) {
- System::unavailable();
- }
}
$a->save_timestamp($stamp1, "network");
- return true;
+ return self::$connected;
+ }
+
+ /**
+ * Disconnects the current database connection
+ */
+ public static function disconnect()
+ {
+ if (is_null(self::$db)) {
+ return;
+ }
+
+ switch (self::$driver) {
+ case 'pdo':
+ self::$db = null;
+ break;
+ case 'mysqli':
+ self::$db->close();
+ self::$db = null;
+ break;
+ }
+ }
+
+ /**
+ * Perform a reconnect of an existing database connection
+ */
+ public static function reconnect() {
+ self::disconnect();
+
+ $ret = self::connect(self::$db_serveraddr, self::$db_user, self::$db_pass, self::$db_name);
+ return $ret;
+ }
+
+ /**
+ * Return the database object.
+ * @return PDO|mysqli
+ */
+ public static function get_db()
+ {
+ return self::$db;
}
/**
*
* @param string $query The database query that will be analyzed
*/
- private static function log_index($query) {
+ private static function logIndex($query) {
$a = get_app();
if (empty($a->config["system"]["db_log_index"])) {
* @param array $args The parameters that are to replace the ? placeholders
* @return string The replaced SQL query
*/
- private static function replace_parameters($sql, $args) {
+ private static function replaceParameters($sql, $args) {
$offset = 0;
foreach ($args AS $param => $value) {
if (is_int($args[$param]) || is_float($args[$param])) {
// The fallback routine is called as well when there are no arguments
if (!$can_be_prepared || (count($args) == 0)) {
- $retval = self::$db->query(self::replace_parameters($sql, $args));
+ $retval = self::$db->query(self::replaceParameters($sql, $args));
if (self::$db->errno) {
self::$error = self::$db->error;
self::$errorno = self::$db->errno;
break;
}
- $params = '';
+ $param_types = '';
$values = [];
foreach ($args AS $param => $value) {
if (is_int($args[$param])) {
- $params .= 'i';
+ $param_types .= 'i';
} elseif (is_float($args[$param])) {
- $params .= 'd';
+ $param_types .= 'd';
} elseif (is_string($args[$param])) {
- $params .= 's';
+ $param_types .= 's';
} else {
- $params .= 'b';
+ $param_types .= 'b';
}
$values[] = &$args[$param];
}
if (count($values) > 0) {
- array_unshift($values, $params);
+ array_unshift($values, $param_types);
call_user_func_array([$stmt, 'bind_param'], $values);
}
$errorno = self::$errorno;
logger('DB Error '.self::$errorno.': '.self::$error."\n".
- System::callstack(8)."\n".self::replace_parameters($sql, $params));
+ System::callstack(8)."\n".self::replaceParameters($sql, $args));
+
+ // On a lost connection we try to reconnect - but only once.
+ if ($errorno == 2006) {
+ if (self::$in_retrial || !self::reconnect()) {
+ // It doesn't make sense to continue when the database connection was lost
+ if (self::$in_retrial) {
+ logger('Giving up retrial because of database error '.$errorno.': '.$error);
+ } else {
+ logger("Couldn't reconnect after database error ".$errorno.': '.$error);
+ }
+ exit(1);
+ } else {
+ // We try it again
+ logger('Reconnected after database error '.$errorno.': '.$error);
+ self::$in_retrial = true;
+ $ret = self::p($sql, $args);
+ self::$in_retrial = false;
+ return $ret;
+ }
+ }
self::$error = $error;
self::$errorno = $errorno;
@file_put_contents($a->config["system"]["db_log"], DateTimeFormat::utcNow()."\t".$duration."\t".
basename($backtrace[1]["file"])."\t".
$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
- substr(self::replace_parameters($sql, $args), 0, 2000)."\n", FILE_APPEND);
+ substr(self::replaceParameters($sql, $args), 0, 2000)."\n", FILE_APPEND);
}
}
return $retval;
$errorno = self::$errorno;
logger('DB Error '.self::$errorno.': '.self::$error."\n".
- System::callstack(8)."\n".self::replace_parameters($sql, $params));
+ System::callstack(8)."\n".self::replaceParameters($sql, $params));
self::$error = $error;
self::$errorno = $errorno;
$fields = [];
- $array_element = each($condition);
- $array_key = $array_element['key'];
- if (!is_int($array_key)) {
- $fields = [$array_key];
+ reset($condition);
+ $first_key = key($condition);
+ if (!is_int($first_key)) {
+ $fields = [$first_key];
}
$stmt = self::select($table, $fields, $condition, ['limit' => 1]);
* @return array current row
*/
public static function fetch($stmt) {
+ $a = get_app();
+
+ $stamp1 = microtime(true);
+
+ $columns = [];
+
if (!is_object($stmt)) {
return false;
}
switch (self::$driver) {
case 'pdo':
- return $stmt->fetch(PDO::FETCH_ASSOC);
+ $columns = $stmt->fetch(PDO::FETCH_ASSOC);
+ break;
case 'mysqli':
if (get_class($stmt) == 'mysqli_result') {
- return $stmt->fetch_assoc();
+ $columns = $stmt->fetch_assoc();
+ break;
}
// This code works, but is slow
$result = $stmt->result_metadata();
$fields = $result->fetch_fields();
- $columns = [];
foreach ($cols_num AS $param => $col) {
$columns[$fields[$param]->name] = $col;
}
- return $columns;
}
+
+ $a->save_timestamp($stamp1, 'database');
+
+ return $columns;
}
/**
*
* This process must only be started once, since the value is cached.
*/
- private static function build_relation_data() {
+ private static function buildRelationData() {
$definition = DBStructure::definition();
foreach ($definition AS $table => $structure) {
*
* @param string $table Table name
* @param array $conditions Field condition(s)
+ * @param array $options
+ * - cascade: If true we delete records in other tables that depend on the one we're deleting through
+ * relations (default: true)
* @param boolean $in_process Internal use: Only do a commit after the last delete
* @param array $callstack Internal use: prevent endless loops
*
* @return boolean|array was the delete successful? When $in_process is set: deletion data
*/
- public static function delete($table, array $conditions, $in_process = false, array &$callstack = [])
+ public static function delete($table, array $conditions, array $options = [], $in_process = false, array &$callstack = [])
{
if (empty($table) || empty($conditions)) {
logger('Table and conditions have to be set');
$commands[$key] = ['table' => $table, 'conditions' => $conditions];
+ $cascade = defaults($options, 'cascade', true);
+
// To speed up the whole process we cache the table relations
- if (count(self::$relation) == 0) {
- self::build_relation_data();
+ if ($cascade && count(self::$relation) == 0) {
+ self::buildRelationData();
}
// Is there a relation entry for the table?
- if (isset(self::$relation[$table])) {
+ if ($cascade && isset(self::$relation[$table])) {
// We only allow a simple "one field" relation.
$field = array_keys(self::$relation[$table])[0];
$rel_def = array_values(self::$relation[$table])[0];
if ((count($conditions) == 1) && ($field == array_keys($conditions)[0])) {
foreach ($rel_def AS $rel_table => $rel_fields) {
foreach ($rel_fields AS $rel_field) {
- $retval = self::delete($rel_table, [$rel_field => array_values($conditions)[0]], true, $callstack);
+ $retval = self::delete($rel_table, [$rel_field => array_values($conditions)[0]], $options, true, $callstack);
$commands = array_merge($commands, $retval);
}
}
while ($row = self::fetch($data)) {
// Now we accumulate the delete commands
- $retval = self::delete($table, [$field => $row[$field]], true, $callstack);
+ $retval = self::delete($table, [$field => $row[$field]], $options, true, $callstack);
$commands = array_merge($commands, $retval);
}
foreach ($commands AS $command) {
$conditions = $command['conditions'];
- $array_element = each($conditions);
- $array_key = $array_element['key'];
- if (is_int($array_key)) {
- $condition_string = " WHERE " . array_shift($conditions);
- } else {
- $condition_string = " WHERE `" . implode("` = ? AND `", array_keys($conditions)) . "` = ?";
- }
+ reset($conditions);
+ $first_key = key($conditions);
- if ((count($command['conditions']) > 1) || is_int($array_key)) {
+ $condition_string = self::buildCondition($conditions);
+
+ if ((count($command['conditions']) > 1) || is_int($first_key)) {
$sql = "DELETE FROM `" . $command['table'] . "`" . $condition_string;
- logger(self::replace_parameters($sql, $conditions), LOGGER_DATA);
+ logger(self::replaceParameters($sql, $conditions), LOGGER_DATA);
if (!self::e($sql, $conditions)) {
if ($do_transaction) {
// Split the SQL queries in chunks of 100 values
// We do the $i stuff here to make the code better readable
$i = $counter[$key_table][$key_condition];
- if (count($compacted[$key_table][$key_condition][$i]) > 100) {
+ if (isset($compacted[$key_table][$key_condition][$i]) && count($compacted[$key_table][$key_condition][$i]) > 100) {
++$i;
}
$sql = "DELETE FROM `" . $table . "` WHERE `" . $field . "` IN (" .
substr(str_repeat("?, ", count($field_values)), 0, -2) . ");";
- logger(self::replace_parameters($sql, $field_values), LOGGER_DATA);
+ logger(self::replaceParameters($sql, $field_values), LOGGER_DATA);
if (!self::e($sql, $field_values)) {
if ($do_transaction) {
$table = self::escape($table);
- $array_element = each($condition);
- $array_key = $array_element['key'];
- if (is_int($array_key)) {
- $condition_string = " WHERE ".array_shift($condition);
- } else {
- $condition_string = " WHERE `".implode("` = ? AND `", array_keys($condition))."` = ?";
- }
+ $condition_string = self::buildCondition($condition);
if (is_bool($old_fields)) {
$do_insert = $old_fields;
return false;
}
+ $table = self::escape($table);
+
if (count($fields) > 0) {
$select_fields = "`" . implode("`, `", array_values($fields)) . "`";
} else {
$condition_string = self::buildCondition($condition);
- $order_string = '';
- if (isset($params['order'])) {
- $order_string = " ORDER BY ";
- foreach ($params['order'] AS $fields => $order) {
- if (!is_int($fields)) {
- $order_string .= "`" . $fields . "` " . ($order ? "DESC" : "ASC") . ", ";
- } else {
- $order_string .= "`" . $order . "`, ";
- }
- }
- $order_string = substr($order_string, 0, -2);
- }
+ $param_string = self::buildParameter($params);
- $limit_string = '';
- if (isset($params['limit']) && is_int($params['limit'])) {
- $limit_string = " LIMIT " . $params['limit'];
- }
-
- if (isset($params['limit']) && is_array($params['limit'])) {
- $limit_string = " LIMIT " . intval($params['limit'][0]) . ", " . intval($params['limit'][1]);
- }
-
- $sql = "SELECT " . $select_fields . " FROM `" . $table . "`" . $condition_string . $order_string . $limit_string;
+ $sql = "SELECT " . $select_fields . " FROM `" . $table . "`" . $condition_string . $param_string;
$result = self::p($sql, $condition);
* @param array $condition
* @return string
*/
- private static function buildCondition(array &$condition = [])
+ public static function buildCondition(array &$condition = [])
{
$condition_string = '';
if (count($condition) > 0) {
- $array_element = each($condition);
- $array_key = $array_element['key'];
- if (is_int($array_key)) {
- $condition_string = " WHERE ".array_shift($condition);
+ reset($condition);
+ $first_key = key($condition);
+ if (is_int($first_key)) {
+ $condition_string = " WHERE (" . array_shift($condition) . ")";
} else {
- $condition_string = " WHERE `".implode("` = ? AND `", array_keys($condition))."` = ?";
+ $new_values = [];
+ $condition_string = "";
+ foreach ($condition as $field => $value) {
+ if ($condition_string != "") {
+ $condition_string .= " AND ";
+ }
+ if (is_array($value)) {
+ $new_values = array_merge($new_values, array_values($value));
+ $placeholders = substr(str_repeat("?, ", count($value)), 0, -2);
+ $condition_string .= "`" . $field . "` IN (" . $placeholders . ")";
+ } else {
+ $new_values[$field] = $value;
+ $condition_string .= "`" . $field . "` = ?";
+ }
+ }
+ $condition_string = " WHERE (" . $condition_string . ")";
+ $condition = $new_values;
}
}
return $condition_string;
}
+ /**
+ * @brief Returns the SQL parameter string built from the provided parameter array
+ *
+ * @param array $params
+ * @return string
+ */
+ public static function buildParameter(array $params = [])
+ {
+ $order_string = '';
+ if (isset($params['order'])) {
+ $order_string = " ORDER BY ";
+ foreach ($params['order'] AS $fields => $order) {
+ if (!is_int($fields)) {
+ $order_string .= "`" . $fields . "` " . ($order ? "DESC" : "ASC") . ", ";
+ } else {
+ $order_string .= "`" . $order . "`, ";
+ }
+ }
+ $order_string = substr($order_string, 0, -2);
+ }
+
+ $limit_string = '';
+ if (isset($params['limit']) && is_int($params['limit'])) {
+ $limit_string = " LIMIT " . $params['limit'];
+ }
+
+ if (isset($params['limit']) && is_array($params['limit'])) {
+ $limit_string = " LIMIT " . intval($params['limit'][0]) . ", " . intval($params['limit'][1]);
+ }
+
+ return $order_string.$limit_string;
+ }
+
/**
* @brief Fills an array with data from a query
*
* @return boolean was the close successful?
*/
public static function close($stmt) {
+ $a = get_app();
+
+ $stamp1 = microtime(true);
+
if (!is_object($stmt)) {
return false;
}
switch (self::$driver) {
case 'pdo':
- return $stmt->closeCursor();
+ $ret = $stmt->closeCursor();
+ break;
case 'mysqli':
$stmt->free_result();
- return $stmt->close();
+ $ret = $stmt->close();
+ break;
}
+
+ $a->save_timestamp($stamp1, 'database');
+
+ return $ret;
}
}
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