class Connection in Drupal 8
Same name in this branch
- 8 core/lib/Drupal/Core/Database/Connection.php \Drupal\Core\Database\Connection
- 8 core/tests/fixtures/database_drivers/custom/corefake/Connection.php \Drupal\Driver\Database\corefake\Connection
- 8 core/tests/fixtures/database_drivers/custom/fake/Connection.php \Drupal\Driver\Database\fake\Connection
- 8 core/tests/fixtures/database_drivers/core/corefake/Connection.php \Drupal\Core\Database\Driver\corefake\Connection
- 8 core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php \Drupal\Core\Database\Driver\sqlite\Connection
- 8 core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php \Drupal\Core\Database\Driver\pgsql\Connection
- 8 core/lib/Drupal/Core/Database/Driver/mysql/Connection.php \Drupal\Core\Database\Driver\mysql\Connection
- 8 core/modules/system/tests/modules/database_statement_monitoring_test/src/sqlite/Connection.php \Drupal\database_statement_monitoring_test\sqlite\Connection
- 8 core/modules/system/tests/modules/database_statement_monitoring_test/src/pgsql/Connection.php \Drupal\database_statement_monitoring_test\pgsql\Connection
- 8 core/modules/system/tests/modules/database_statement_monitoring_test/src/mysql/Connection.php \Drupal\database_statement_monitoring_test\mysql\Connection
- 8 core/tests/fixtures/database_drivers/module/corefake/src/Driver/Database/corefake/Connection.php \Drupal\corefake\Driver\Database\corefake\Connection
- 8 core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysql/Connection.php \Drupal\driver_test\Driver\Database\DrivertestMysql\Connection
- 8 core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestPgsql/Connection.php \Drupal\driver_test\Driver\Database\DrivertestPgsql\Connection
- 8 core/modules/system/tests/modules/driver_test/src/Driver/Database/DrivertestMysqlDeprecatedVersion/Connection.php \Drupal\driver_test\Driver\Database\DrivertestMysqlDeprecatedVersion\Connection
Same name and namespace in other branches
- 9 core/lib/Drupal/Core/Database/Driver/mysql/Connection.php \Drupal\Core\Database\Driver\mysql\Connection
- 10 core/lib/Drupal/Core/Database/Driver/mysql/Connection.php \Drupal\Core\Database\Driver\mysql\Connection
MySQL implementation of \Drupal\Core\Database\Connection.
Hierarchy
- class \Drupal\Core\Database\Connection
- class \Drupal\Core\Database\Driver\mysql\Connection
Expanded class hierarchy of Connection
Related topics
4 files declare their use of Connection
- Connection.php in core/
modules/ system/ tests/ modules/ database_statement_monitoring_test/ src/ mysql/ Connection.php - Connection.php in core/
modules/ system/ tests/ modules/ driver_test/ src/ Driver/ Database/ DrivertestMysql/ Connection.php - Connection.php in core/
modules/ system/ tests/ modules/ driver_test/ src/ Driver/ Database/ DrivertestMysqlDeprecatedVersion/ Connection.php - Tasks.php in core/
lib/ Drupal/ Core/ Database/ Driver/ mysql/ Install/ Tasks.php
File
- core/
lib/ Drupal/ Core/ Database/ Driver/ mysql/ Connection.php, line 22
Namespace
Drupal\Core\Database\Driver\mysqlView source
class Connection extends DatabaseConnection {
/**
* Error code for "Unknown database" error.
*/
const DATABASE_NOT_FOUND = 1049;
/**
* Error code for "Access denied" error.
*/
const ACCESS_DENIED = 1045;
/**
* Error code for "Can't initialize character set" error.
*/
const UNSUPPORTED_CHARSET = 2019;
/**
* Driver-specific error code for "Unknown character set" error.
*/
const UNKNOWN_CHARSET = 1115;
/**
* SQLSTATE error code for "Syntax error or access rule violation".
*/
const SQLSTATE_SYNTAX_ERROR = 42000;
/**
* Flag to indicate if the cleanup function in __destruct() should run.
*
* @var bool
*/
protected $needsCleanup = FALSE;
/**
* The minimal possible value for the max_allowed_packet setting of MySQL.
*
* @link https://mariadb.com/kb/en/mariadb/server-system-variables/#max_allowed_packet
* @link https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_max_allowed_packet
*
* @var int
*/
const MIN_MAX_ALLOWED_PACKET = 1024;
/**
* The list of MySQL reserved key words.
*
* @link https://dev.mysql.com/doc/refman/8.0/en/keywords.html
*/
private $reservedKeyWords = [
'accessible',
'add',
'admin',
'all',
'alter',
'analyze',
'and',
'as',
'asc',
'asensitive',
'before',
'between',
'bigint',
'binary',
'blob',
'both',
'by',
'call',
'cascade',
'case',
'change',
'char',
'character',
'check',
'collate',
'column',
'condition',
'constraint',
'continue',
'convert',
'create',
'cross',
'cube',
'cume_dist',
'current_date',
'current_time',
'current_timestamp',
'current_user',
'cursor',
'database',
'databases',
'day_hour',
'day_microsecond',
'day_minute',
'day_second',
'dec',
'decimal',
'declare',
'default',
'delayed',
'delete',
'dense_rank',
'desc',
'describe',
'deterministic',
'distinct',
'distinctrow',
'div',
'double',
'drop',
'dual',
'each',
'else',
'elseif',
'empty',
'enclosed',
'escaped',
'except',
'exists',
'exit',
'explain',
'false',
'fetch',
'first_value',
'float',
'float4',
'float8',
'for',
'force',
'foreign',
'from',
'fulltext',
'function',
'generated',
'get',
'grant',
'group',
'grouping',
'groups',
'having',
'high_priority',
'hour_microsecond',
'hour_minute',
'hour_second',
'if',
'ignore',
'in',
'index',
'infile',
'inner',
'inout',
'insensitive',
'insert',
'int',
'int1',
'int2',
'int3',
'int4',
'int8',
'integer',
'interval',
'into',
'io_after_gtids',
'io_before_gtids',
'is',
'iterate',
'join',
'json_table',
'key',
'keys',
'kill',
'lag',
'last_value',
'lead',
'leading',
'leave',
'left',
'like',
'limit',
'linear',
'lines',
'load',
'localtime',
'localtimestamp',
'lock',
'long',
'longblob',
'longtext',
'loop',
'low_priority',
'master_bind',
'master_ssl_verify_server_cert',
'match',
'maxvalue',
'mediumblob',
'mediumint',
'mediumtext',
'middleint',
'minute_microsecond',
'minute_second',
'mod',
'modifies',
'natural',
'not',
'no_write_to_binlog',
'nth_value',
'ntile',
'null',
'numeric',
'of',
'on',
'optimize',
'optimizer_costs',
'option',
'optionally',
'or',
'order',
'out',
'outer',
'outfile',
'over',
'partition',
'percent_rank',
'persist',
'persist_only',
'precision',
'primary',
'procedure',
'purge',
'range',
'rank',
'read',
'reads',
'read_write',
'real',
'recursive',
'references',
'regexp',
'release',
'rename',
'repeat',
'replace',
'require',
'resignal',
'restrict',
'return',
'revoke',
'right',
'rlike',
'row',
'rows',
'row_number',
'schema',
'schemas',
'second_microsecond',
'select',
'sensitive',
'separator',
'set',
'show',
'signal',
'smallint',
'spatial',
'specific',
'sql',
'sqlexception',
'sqlstate',
'sqlwarning',
'sql_big_result',
'sql_calc_found_rows',
'sql_small_result',
'ssl',
'starting',
'stored',
'straight_join',
'system',
'table',
'terminated',
'then',
'tinyblob',
'tinyint',
'tinytext',
'to',
'trailing',
'trigger',
'true',
'undo',
'union',
'unique',
'unlock',
'unsigned',
'update',
'usage',
'use',
'using',
'utc_date',
'utc_time',
'utc_timestamp',
'values',
'varbinary',
'varchar',
'varcharacter',
'varying',
'virtual',
'when',
'where',
'while',
'window',
'with',
'write',
'xor',
'year_month',
'zerofill',
];
/**
* Constructs a Connection object.
*/
public function __construct(\PDO $connection, array $connection_options = []) {
parent::__construct($connection, $connection_options);
// This driver defaults to transaction support, except if explicitly passed FALSE.
$this->transactionSupport = !isset($connection_options['transactions']) || $connection_options['transactions'] !== FALSE;
// MySQL never supports transactional DDL.
$this->transactionalDDLSupport = FALSE;
$this->connectionOptions = $connection_options;
}
/**
* {@inheritdoc}
*/
public function query($query, array $args = [], $options = []) {
try {
return parent::query($query, $args, $options);
} catch (DatabaseException $e) {
if ($e
->getPrevious()->errorInfo[1] == 1153) {
// If a max_allowed_packet error occurs the message length is truncated.
// This should prevent the error from recurring if the exception is
// logged to the database using dblog or the like.
$message = Unicode::truncateBytes($e
->getMessage(), self::MIN_MAX_ALLOWED_PACKET);
$e = new DatabaseExceptionWrapper($message, $e
->getCode(), $e
->getPrevious());
}
throw $e;
}
}
/**
* {@inheritdoc}
*/
public static function open(array &$connection_options = []) {
if (isset($connection_options['_dsn_utf8_fallback']) && $connection_options['_dsn_utf8_fallback'] === TRUE) {
// Only used during the installer version check, as a fallback from utf8mb4.
$charset = 'utf8';
}
else {
$charset = 'utf8mb4';
}
// The DSN should use either a socket or a host/port.
if (isset($connection_options['unix_socket'])) {
$dsn = 'mysql:unix_socket=' . $connection_options['unix_socket'];
}
else {
// Default to TCP connection on port 3306.
$dsn = 'mysql:host=' . $connection_options['host'] . ';port=' . (empty($connection_options['port']) ? 3306 : $connection_options['port']);
}
// Character set is added to dsn to ensure PDO uses the proper character
// set when escaping. This has security implications. See
// https://www.drupal.org/node/1201452 for further discussion.
$dsn .= ';charset=' . $charset;
if (!empty($connection_options['database'])) {
$dsn .= ';dbname=' . $connection_options['database'];
}
// Allow PDO options to be overridden.
$connection_options += [
'pdo' => [],
];
$connection_options['pdo'] += [
\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
// So we don't have to mess around with cursors and unbuffered queries by default.
\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => TRUE,
// Make sure MySQL returns all matched rows on update queries including
// rows that actually didn't have to be updated because the values didn't
// change. This matches common behavior among other database systems.
\PDO::MYSQL_ATTR_FOUND_ROWS => TRUE,
// Because MySQL's prepared statements skip the query cache, because it's dumb.
\PDO::ATTR_EMULATE_PREPARES => TRUE,
// Limit SQL to a single statement like mysqli.
\PDO::MYSQL_ATTR_MULTI_STATEMENTS => FALSE,
];
try {
$pdo = new \PDO($dsn, $connection_options['username'], $connection_options['password'], $connection_options['pdo']);
} catch (\PDOException $e) {
if ($e
->getCode() == static::DATABASE_NOT_FOUND) {
throw new DatabaseNotFoundException($e
->getMessage(), $e
->getCode(), $e);
}
if ($e
->getCode() == static::ACCESS_DENIED) {
throw new DatabaseAccessDeniedException($e
->getMessage(), $e
->getCode(), $e);
}
throw $e;
}
// Force MySQL to use the UTF-8 character set. Also set the collation, if a
// certain one has been set; otherwise, MySQL defaults to
// 'utf8mb4_general_ci' (MySQL 5) or 'utf8mb4_0900_ai_ci' (MySQL 8) for
// utf8mb4.
if (!empty($connection_options['collation'])) {
$pdo
->exec('SET NAMES ' . $charset . ' COLLATE ' . $connection_options['collation']);
}
else {
$pdo
->exec('SET NAMES ' . $charset);
}
// Set MySQL init_commands if not already defined. Default Drupal's MySQL
// behavior to conform more closely to SQL standards. This allows Drupal
// to run almost seamlessly on many different kinds of database systems.
// These settings force MySQL to behave the same as postgresql, or sqlite
// in regards to syntax interpretation and invalid data handling. See
// https://www.drupal.org/node/344575 for further discussion. Also, as MySQL
// 5.5 changed the meaning of TRADITIONAL we need to spell out the modes one
// by one.
$connection_options += [
'init_commands' => [],
];
$sql_mode = 'ANSI,STRICT_TRANS_TABLES,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,ONLY_FULL_GROUP_BY';
// NO_AUTO_CREATE_USER is removed in MySQL 8.0.11
// https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-11.html#mysqld-8-0-11-deprecation-removal
$version_server = $pdo
->getAttribute(\PDO::ATTR_SERVER_VERSION);
if (version_compare($version_server, '8.0.11', '<')) {
$sql_mode .= ',NO_AUTO_CREATE_USER';
}
$connection_options['init_commands'] += [
'sql_mode' => "SET sql_mode = '{$sql_mode}'",
];
// Execute initial commands.
foreach ($connection_options['init_commands'] as $sql) {
$pdo
->exec($sql);
}
return $pdo;
}
/**
* {@inheritdoc}
*/
public function escapeField($field) {
$field = parent::escapeField($field);
return $this
->quoteIdentifier($field);
}
/**
* {@inheritdoc}
*/
public function escapeAlias($field) {
// Quote fields so that MySQL reserved words like 'function' can be used
// as aliases.
$field = parent::escapeAlias($field);
return $this
->quoteIdentifier($field);
}
/**
* Quotes an identifier if it matches a MySQL reserved keyword.
*
* @param string $identifier
* The field to check.
*
* @return string
* The identifier, quoted if it matches a MySQL reserved keyword.
*/
private function quoteIdentifier($identifier) {
// Quote identifiers so that MySQL reserved words like 'function' can be
// used as column names. Sometimes the 'table.column_name' format is passed
// in. For example,
// \Drupal\Core\Entity\Sql\SqlContentEntityStorage::buildQuery() adds a
// condition on "base.uid" while loading user entities.
if (strpos($identifier, '.') !== FALSE) {
list($table, $identifier) = explode('.', $identifier, 2);
}
if (in_array(strtolower($identifier), $this->reservedKeyWords, TRUE)) {
// Quote the string for MySQL reserved keywords.
$identifier = '"' . $identifier . '"';
}
return isset($table) ? $table . '.' . $identifier : $identifier;
}
/**
* {@inheritdoc}
*/
public function serialize() {
// Cleanup the connection, much like __destruct() does it as well.
if ($this->needsCleanup) {
$this
->nextIdDelete();
}
$this->needsCleanup = FALSE;
return parent::serialize();
}
/**
* {@inheritdoc}
*/
public function __destruct() {
if ($this->needsCleanup) {
$this
->nextIdDelete();
}
}
public function queryRange($query, $from, $count, array $args = [], array $options = []) {
return $this
->query($query . ' LIMIT ' . (int) $from . ', ' . (int) $count, $args, $options);
}
public function queryTemporary($query, array $args = [], array $options = []) {
$tablename = $this
->generateTemporaryTableName();
$this
->query('CREATE TEMPORARY TABLE {' . $tablename . '} Engine=MEMORY ' . $query, $args, $options);
return $tablename;
}
public function driver() {
return 'mysql';
}
public function databaseType() {
return 'mysql';
}
/**
* Overrides \Drupal\Core\Database\Connection::createDatabase().
*
* @param string $database
* The name of the database to create.
*
* @throws \Drupal\Core\Database\DatabaseNotFoundException
*/
public function createDatabase($database) {
// Escape the database name.
$database = Database::getConnection()
->escapeDatabase($database);
try {
// Create the database and set it as active.
$this->connection
->exec("CREATE DATABASE {$database}");
$this->connection
->exec("USE {$database}");
} catch (\Exception $e) {
throw new DatabaseNotFoundException($e
->getMessage());
}
}
public function mapConditionOperator($operator) {
// We don't want to override any of the defaults.
return NULL;
}
public function nextId($existing_id = 0) {
$new_id = $this
->query('INSERT INTO {sequences} () VALUES ()', [], [
'return' => Database::RETURN_INSERT_ID,
]);
// This should only happen after an import or similar event.
if ($existing_id >= $new_id) {
// If we INSERT a value manually into the sequences table, on the next
// INSERT, MySQL will generate a larger value. However, there is no way
// of knowing whether this value already exists in the table. MySQL
// provides an INSERT IGNORE which would work, but that can mask problems
// other than duplicate keys. Instead, we use INSERT ... ON DUPLICATE KEY
// UPDATE in such a way that the UPDATE does not do anything. This way,
// duplicate keys do not generate errors but everything else does.
$this
->query('INSERT INTO {sequences} (value) VALUES (:value) ON DUPLICATE KEY UPDATE value = value', [
':value' => $existing_id,
]);
$new_id = $this
->query('INSERT INTO {sequences} () VALUES ()', [], [
'return' => Database::RETURN_INSERT_ID,
]);
}
$this->needsCleanup = TRUE;
return $new_id;
}
public function nextIdDelete() {
// While we want to clean up the table to keep it up from occupying too
// much storage and memory, we must keep the highest value in the table
// because InnoDB uses an in-memory auto-increment counter as long as the
// server runs. When the server is stopped and restarted, InnoDB
// reinitializes the counter for each table for the first INSERT to the
// table based solely on values from the table so deleting all values would
// be a problem in this case. Also, TRUNCATE resets the auto increment
// counter.
try {
$max_id = $this
->query('SELECT MAX(value) FROM {sequences}')
->fetchField();
// We know we are using MySQL here, no need for the slower ::delete().
$this
->query('DELETE FROM {sequences} WHERE value < :value', [
':value' => $max_id,
]);
} catch (DatabaseException $e) {
}
}
/**
* Overridden to work around issues to MySQL not supporting transactional DDL.
*/
protected function popCommittableTransactions() {
// Commit all the committable layers.
foreach (array_reverse($this->transactionLayers) as $name => $active) {
// Stop once we found an active transaction.
if ($active) {
break;
}
// If there are no more layers left then we should commit.
unset($this->transactionLayers[$name]);
if (empty($this->transactionLayers)) {
$this
->doCommit();
}
else {
// Attempt to release this savepoint in the standard way.
try {
$this
->query('RELEASE SAVEPOINT ' . $name);
} catch (DatabaseExceptionWrapper $e) {
// However, in MySQL (InnoDB), savepoints are automatically committed
// when tables are altered or created (DDL transactions are not
// supported). This can cause exceptions due to trying to release
// savepoints which no longer exist.
//
// To avoid exceptions when no actual error has occurred, we silently
// succeed for MySQL error code 1305 ("SAVEPOINT does not exist").
if ($e
->getPrevious()->errorInfo[1] == '1305') {
// If one SAVEPOINT was released automatically, then all were.
// Therefore, clean the transaction stack.
$this->transactionLayers = [];
// We also have to explain to PDO that the transaction stack has
// been cleaned-up.
$this
->doCommit();
}
else {
throw $e;
}
}
}
}
}
}
Members
Name | Modifiers | Type | Description | Overrides |
---|---|---|---|---|
Connection:: |
protected | property | The actual PDO connection. | |
Connection:: |
protected | property | The connection information for this connection object. | |
Connection:: |
protected | property | Index of what driver-specific class to use for various operations. | |
Connection:: |
protected | property | List of escaped aliases names, keyed by unescaped aliases. | |
Connection:: |
protected | property | List of escaped database, table, and field names, keyed by unescaped names. | |
Connection:: |
protected | property | The key representing this connection. | |
Connection:: |
protected | property | The current database logging object for this connection. | |
Connection:: |
protected | property | Flag to indicate if the cleanup function in __destruct() should run. | |
Connection:: |
protected | property | The prefixes used by this database connection. | |
Connection:: |
protected | property | List of replacement values for use in prefixTables(). | |
Connection:: |
protected | property | List of search values for use in prefixTables(). | |
Connection:: |
private | property | The list of MySQL reserved key words. | |
Connection:: |
protected | property | Post-root (non-nested) transaction commit callbacks. | |
Connection:: |
protected | property | The schema object for this connection. | |
Connection:: |
protected | property | The name of the Statement class for this connection. | |
Connection:: |
protected | property | The database target this connection is for. | |
Connection:: |
protected | property | An index used to generate unique temporary table names. | |
Connection:: |
protected | property | Whether this database connection supports transactional DDL. | |
Connection:: |
protected | property | Tracks the number of "layers" of transactions currently active. | |
Connection:: |
protected | property | Whether this database connection supports transactions. | |
Connection:: |
protected | property | List of un-prefixed table names, keyed by prefixed table names. | |
Connection:: |
constant | Error code for "Access denied" error. | ||
Connection:: |
public | function | Adds a root transaction end callback. | |
Connection:: |
public | function | Returns the version of the database client. | |
Connection:: |
public | function | Throws an exception to deny direct access to transaction commits. | |
Connection:: |
public | function | Prepares and returns a CONDITION query object. | |
Connection:: |
public static | function | Creates an array of database connection options from a URL. | 1 |
Connection:: |
public | function |
Overrides \Drupal\Core\Database\Connection::createDatabase(). Overrides Connection:: |
|
Connection:: |
public static | function | Creates a URL from an array of database connection options. | 1 |
Connection:: |
public | function |
Returns the name of the PDO driver for this connection. Overrides Connection:: |
|
Connection:: |
constant | Error code for "Unknown database" error. | ||
Connection:: |
protected | function | Returns the default query options for any given query. | |
Connection:: |
public | function | Prepares and returns a DELETE query object. | |
Connection:: |
public | function | Destroys this Connection object. | |
Connection:: |
protected | function | Do the actual commit, invoke post-commit callbacks. | |
Connection:: |
public | function |
Returns the type of database driver. Overrides Connection:: |
|
Connection:: |
public | function |
Escapes an alias name string. Overrides Connection:: |
|
Connection:: |
public | function | Escapes a database name string. | |
Connection:: |
public | function |
Escapes a field name string. Overrides Connection:: |
|
Connection:: |
public | function | Escapes characters that work as wildcard characters in a LIKE pattern. | |
Connection:: |
public | function | Escapes a table name string. | 1 |
Connection:: |
protected | function | Expands out shorthand placeholders. | |
Connection:: |
protected | function | Sanitize a query comment string. | |
Connection:: |
protected | function | Generates a temporary table name. | |
Connection:: |
public | function | Returns the connection information for this connection object. | |
Connection:: |
public | function | Gets the driver-specific override class if any for the specified class. | |
Connection:: |
public | function | Get a fully qualified table name. | 2 |
Connection:: |
public | function | Returns the key this connection is associated with. | |
Connection:: |
public | function | Gets the current logging object for this connection. | |
Connection:: |
protected static | function | Extracts the SQLSTATE error from the PDOException. | |
Connection:: |
public | function | Returns the target this connection is associated with. | |
Connection:: |
public | function | Gets a list of individually prefixed table names. | |
Connection:: |
protected | function | Wraps and re-throws any PDO exception thrown by static::query(). | 1 |
Connection:: |
public | function | Prepares and returns an INSERT query object. | |
Connection:: |
public | function | Determines if there is an active transaction open. | |
Connection:: |
public | function | Flatten an array of query comments into a single comment string. | |
Connection:: |
public | function | Creates the appropriate sequence name for a given table and serial field. | |
Connection:: |
public | function |
Gets any special processing requirements for the condition operator. Overrides Connection:: |
|
Connection:: |
public | function | Prepares and returns a MERGE query object. | |
Connection:: |
constant | The minimal possible value for the max_allowed_packet setting of MySQL. | ||
Connection:: |
public | function |
Retrieves an unique ID from a given sequence. Overrides Connection:: |
|
Connection:: |
public | function | ||
Connection:: |
public static | function |
Opens a PDO connection. Overrides Connection:: |
|
Connection:: |
protected | function |
Overridden to work around issues to MySQL not supporting transactional DDL. Overrides Connection:: |
|
Connection:: |
public | function | Decreases the depth of transaction nesting. | |
Connection:: |
public | function | Appends a database prefix to all tables in a query. | |
Connection:: |
public | function | Prepares a statement for execution and returns a statement object | 1 |
Connection:: |
public | function | Prepares a query string and returns the prepared statement. | 2 |
Connection:: |
public | function | Increases the depth of transaction nesting. | |
Connection:: |
public | function |
Executes a query string against the database. Overrides Connection:: |
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Connection:: |
public | function |
Runs a limited-range query on this database object. Overrides Connection:: |
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Connection:: |
public | function |
Runs a SELECT query and stores its results in a temporary table. Overrides Connection:: |
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Connection:: |
public | function | Quotes a string for use in a query. | |
Connection:: |
private | function | Quotes an identifier if it matches a MySQL reserved keyword. | |
Connection:: |
public | function | Rolls back the transaction entirely or to a named savepoint. | |
Connection:: |
public | function | Returns a DatabaseSchema object for manipulating the schema. | |
Connection:: |
public | function | Prepares and returns a SELECT query object. | |
Connection:: |
public | function | ||
Connection:: |
public | function | Tells this connection object what its key is. | |
Connection:: |
public | function | Associates a logging object with this connection. | |
Connection:: |
protected | function | Set the list of prefixes used by this database connection. | |
Connection:: |
public | function | Tells this connection object what its target value is. | |
Connection:: |
constant | SQLSTATE error code for "Syntax error or access rule violation". | ||
Connection:: |
public | function | Returns a new DatabaseTransaction object on this connection. | |
Connection:: |
public | function | Determines if this driver supports transactional DDL. | |
Connection:: |
public | function | Determines if this driver supports transactions. | |
Connection:: |
public | function | Find the prefix for a table. | |
Connection:: |
public | function | Determines the current transaction depth. | |
Connection:: |
public | function | Prepares and returns a TRUNCATE query object. | |
Connection:: |
constant | Driver-specific error code for "Unknown character set" error. | ||
Connection:: |
constant | Error code for "Can't initialize character set" error. | ||
Connection:: |
public | function | Prepares and returns an UPDATE query object. | |
Connection:: |
public | function | Prepares and returns an UPSERT query object. | 1 |
Connection:: |
public | function | Returns the version of the database server. | 1 |
Connection:: |
public | function |
Constructs a Connection object. Overrides Connection:: |
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Connection:: |
public | function | ||
Connection:: |
public | function | Prevents the database connection from being serialized. |