/src/Joomla/Database/Sqlsrv/SqlsrvDriver.php
PHP | 1081 lines | 699 code | 100 blank | 282 comment | 40 complexity | a341a0d5bd0f90ad966aaf2fb2c74ded MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.1
- <?php
- /**
- * Part of the Joomla Framework Database Package
- *
- * @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
- * @license GNU General Public License version 2 or later; see LICENSE
- */
- namespace Joomla\Database\Sqlsrv;
- use Psr\Log;
- use Joomla\Database\DatabaseDriver;
- /**
- * SQL Server database driver
- *
- * @see http://msdn.microsoft.com/en-us/library/cc296152(SQL.90).aspx
- * @since 1.0
- */
- class SqlsrvDriver extends DatabaseDriver
- {
- /**
- * The name of the database driver.
- *
- * @var string
- * @since 1.0
- */
- public $name = 'sqlsrv';
- /**
- * The character(s) used to quote SQL statement names such as table names or field names,
- * etc. The child classes should define this as necessary. If a single character string the
- * same character is used for both sides of the quoted name, else the first character will be
- * used for the opening quote and the second for the closing quote.
- *
- * @var string
- * @since 1.0
- */
- protected $nameQuote;
- /**
- * The null or zero representation of a timestamp for the database driver. This should be
- * defined in child classes to hold the appropriate value for the engine.
- *
- * @var string
- * @since 1.0
- */
- protected $nullDate = '1900-01-01 00:00:00';
- /**
- * @var string The minimum supported database version.
- * @since 1.0
- */
- protected static $dbMinimum = '10.50.1600.1';
- /**
- * Test to see if the SQLSRV connector is available.
- *
- * @return boolean True on success, false otherwise.
- *
- * @since 1.0
- */
- public static function isSupported()
- {
- return (function_exists('sqlsrv_connect'));
- }
- /**
- * Constructor.
- *
- * @param array $options List of options used to configure the connection
- *
- * @since 1.0
- */
- public function __construct($options)
- {
- // Get some basic values from the options.
- $options['host'] = (isset($options['host'])) ? $options['host'] : 'localhost';
- $options['user'] = (isset($options['user'])) ? $options['user'] : '';
- $options['password'] = (isset($options['password'])) ? $options['password'] : '';
- $options['database'] = (isset($options['database'])) ? $options['database'] : '';
- $options['select'] = (isset($options['select'])) ? (bool) $options['select'] : true;
- // Finalize initialisation
- parent::__construct($options);
- }
- /**
- * Destructor.
- *
- * @since 1.0
- */
- public function __destruct()
- {
- if (is_resource($this->connection))
- {
- sqlsrv_close($this->connection);
- }
- }
- /**
- * Connects to the database if needed.
- *
- * @return void Returns void if the database connected successfully.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function connect()
- {
- if ($this->connection)
- {
- return;
- }
- // Build the connection configuration array.
- $config = array(
- 'Database' => $this->options['database'],
- 'uid' => $this->options['user'],
- 'pwd' => $this->options['password'],
- 'CharacterSet' => 'UTF-8',
- 'ReturnDatesAsStrings' => true);
- // Make sure the SQLSRV extension for PHP is installed and enabled.
- if (!function_exists('sqlsrv_connect'))
- {
- throw new \RuntimeException('PHP extension sqlsrv_connect is not available.');
- }
- // Attempt to connect to the server.
- if (!($this->connection = @ sqlsrv_connect($this->options['host'], $config)))
- {
- throw new \RuntimeException('Database sqlsrv_connect failed');
- }
- // Make sure that DB warnings are not returned as errors.
- sqlsrv_configure('WarningsReturnAsErrors', 0);
- // If auto-select is enabled select the given database.
- if ($this->options['select'] && !empty($this->options['database']))
- {
- $this->select($this->options['database']);
- }
- }
- /**
- * Disconnects the database.
- *
- * @return void
- *
- * @since 1.0
- */
- public function disconnect()
- {
- // Close the connection.
- if (is_resource($this->connection))
- {
- sqlsrv_close($this->connection);
- }
- $this->connection = null;
- }
- /**
- * Get table constraints
- *
- * @param string $tableName The name of the database table.
- *
- * @return array Any constraints available for the table.
- *
- * @since 1.0
- */
- protected function getTableConstraints($tableName)
- {
- $this->connect();
- $query = $this->getQuery(true);
- $this->setQuery(
- 'SELECT CONSTRAINT_NAME FROM' . ' INFORMATION_SCHEMA.TABLE_CONSTRAINTS' . ' WHERE TABLE_NAME = ' . $query->quote($tableName)
- );
- return $this->loadColumn();
- }
- /**
- * Rename constraints.
- *
- * @param array $constraints Array(strings) of table constraints
- * @param string $prefix A string
- * @param string $backup A string
- *
- * @return void
- *
- * @since 1.0
- */
- protected function renameConstraints($constraints = array(), $prefix = null, $backup = null)
- {
- $this->connect();
- foreach ($constraints as $constraint)
- {
- $this->setQuery('sp_rename ' . $constraint . ',' . str_replace($prefix, $backup, $constraint));
- $this->execute();
- }
- }
- /**
- * Method to escape a string for usage in an SQL statement.
- *
- * The escaping for MSSQL isn't handled in the driver though that would be nice. Because of this we need
- * to handle the escaping ourselves.
- *
- * @param string $text The string to be escaped.
- * @param boolean $extra Optional parameter to provide extra escaping.
- *
- * @return string The escaped string.
- *
- * @since 1.0
- */
- public function escape($text, $extra = false)
- {
- $result = addslashes($text);
- $result = str_replace("\'", "''", $result);
- $result = str_replace('\"', '"', $result);
- $result = str_replace('\/', '/', $result);
- if ($extra)
- {
- // We need the below str_replace since the search in sql server doesn't recognize _ character.
- $result = str_replace('_', '[_]', $result);
- }
- return $result;
- }
- /**
- * Determines if the connection to the server is active.
- *
- * @return boolean True if connected to the database engine.
- *
- * @since 1.0
- */
- public function connected()
- {
- // TODO: Run a blank query here
- return true;
- }
- /**
- * Drops a table from the database.
- *
- * @param string $tableName The name of the database table to drop.
- * @param boolean $ifExists Optionally specify that the table must exist before it is dropped.
- *
- * @return SqlsrvDriver Returns this object to support chaining.
- *
- * @since 1.0
- */
- public function dropTable($tableName, $ifExists = true)
- {
- $this->connect();
- $query = $this->getQuery(true);
- if ($ifExists)
- {
- $this->setQuery(
- 'IF EXISTS(SELECT TABLE_NAME FROM' . ' INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = ' . $query->quote($tableName) . ') DROP TABLE ' . $tableName
- );
- }
- else
- {
- $this->setQuery('DROP TABLE ' . $tableName);
- }
- $this->execute();
- return $this;
- }
- /**
- * Get the number of affected rows for the previous executed SQL statement.
- *
- * @return integer The number of affected rows.
- *
- * @since 1.0
- */
- public function getAffectedRows()
- {
- $this->connect();
- return sqlsrv_rows_affected($this->cursor);
- }
- /**
- * Method to get the database collation in use by sampling a text field of a table in the database.
- *
- * @return mixed The collation in use by the database or boolean false if not supported.
- *
- * @since 1.0
- */
- public function getCollation()
- {
- // TODO: Not fake this
- return 'MSSQL UTF-8 (UCS2)';
- }
- /**
- * Get the number of returned rows for the previous executed SQL statement.
- *
- * @param resource $cursor An optional database cursor resource to extract the row count from.
- *
- * @return integer The number of returned rows.
- *
- * @since 1.0
- */
- public function getNumRows($cursor = null)
- {
- $this->connect();
- return sqlsrv_num_rows($cursor ? $cursor : $this->cursor);
- }
- /**
- * Retrieves field information about the given tables.
- *
- * @param mixed $table A table name
- * @param boolean $typeOnly True to only return field types.
- *
- * @return array An array of fields.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function getTableColumns($table, $typeOnly = true)
- {
- $result = array();
- $table_temp = $this->replacePrefix((string) $table);
- // Set the query to get the table fields statement.
- $this->setQuery(
- 'SELECT column_name as Field, data_type as Type, is_nullable as \'Null\', column_default as \'Default\'' .
- ' FROM information_schema.columns' . ' WHERE table_name = ' . $this->quote($table_temp)
- );
- $fields = $this->loadObjectList();
- // If we only want the type as the value add just that to the list.
- if ($typeOnly)
- {
- foreach ($fields as $field)
- {
- $result[$field->Field] = preg_replace("/[(0-9)]/", '', $field->Type);
- }
- }
- else
- // If we want the whole field data object add that to the list.
- {
- foreach ($fields as $field)
- {
- $result[$field->Field] = $field;
- }
- }
- return $result;
- }
- /**
- * Shows the table CREATE statement that creates the given tables.
- *
- * This is unsupported by MSSQL.
- *
- * @param mixed $tables A table name or a list of table names.
- *
- * @return array A list of the create SQL for the tables.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function getTableCreate($tables)
- {
- $this->connect();
- return '';
- }
- /**
- * Get the details list of keys for a table.
- *
- * @param string $table The name of the table.
- *
- * @return array An array of the column specification for the table.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function getTableKeys($table)
- {
- $this->connect();
- // TODO To implement.
- return array();
- }
- /**
- * Method to get an array of all tables in the database.
- *
- * @return array An array of all the tables in the database.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function getTableList()
- {
- $this->connect();
- // Set the query to get the tables statement.
- $this->setQuery('SELECT name FROM ' . $this->getDatabase() . '.sys.Tables WHERE type = \'U\';');
- $tables = $this->loadColumn();
- return $tables;
- }
- /**
- * Get the version of the database connector.
- *
- * @return string The database connector version.
- *
- * @since 1.0
- */
- public function getVersion()
- {
- $this->connect();
- $version = sqlsrv_server_info($this->connection);
- return $version['SQLServerVersion'];
- }
- /**
- * Inserts a row into a table based on an object's properties.
- *
- * @param string $table The name of the database table to insert into.
- * @param object &$object A reference to an object whose public properties match the table fields.
- * @param string $key The name of the primary key. If provided the object property is updated.
- *
- * @return boolean True on success.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function insertObject($table, &$object, $key = null)
- {
- $fields = array();
- $values = array();
- $statement = 'INSERT INTO ' . $this->quoteName($table) . ' (%s) VALUES (%s)';
- foreach (get_object_vars($object) as $k => $v)
- {
- // Only process non-null scalars.
- if (is_array($v) or is_object($v) or $v === null)
- {
- continue;
- }
- if (!$this->checkFieldExists($table, $k))
- {
- continue;
- }
- if ($k[0] == '_')
- {
- // Internal field
- continue;
- }
- if ($k == $key && $key == 0)
- {
- continue;
- }
- $fields[] = $this->quoteName($k);
- $values[] = $this->Quote($v);
- }
- // Set the query and execute the insert.
- $this->setQuery(sprintf($statement, implode(',', $fields), implode(',', $values)));
- if (!$this->execute())
- {
- return false;
- }
- $id = $this->insertid();
- if ($key && $id)
- {
- $object->$key = $id;
- }
- return true;
- }
- /**
- * Method to get the auto-incremented value from the last INSERT statement.
- *
- * @return integer The value of the auto-increment field from the last inserted row.
- *
- * @since 1.0
- */
- public function insertid()
- {
- $this->connect();
- // TODO: SELECT IDENTITY
- $this->setQuery('SELECT @@IDENTITY');
- return (int) $this->loadResult();
- }
- /**
- * Method to get the first field of the first row of the result set from the database query.
- *
- * @return mixed The return value or null if the query failed.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function loadResult()
- {
- $ret = null;
- // Execute the query and get the result set cursor.
- if (!($cursor = $this->execute()))
- {
- return null;
- }
- // Get the first row from the result set as an array.
- if ($row = sqlsrv_fetch_array($cursor, SQLSRV_FETCH_NUMERIC))
- {
- $ret = $row[0];
- }
- // Free up system resources and return.
- $this->freeResult($cursor);
- // For SQLServer - we need to strip slashes
- $ret = stripslashes($ret);
- return $ret;
- }
- /**
- * Execute the SQL statement.
- *
- * @return mixed A database cursor resource on success, boolean false on failure.
- *
- * @since 1.0
- * @throws \Exception
- * @throws \RuntimeException
- */
- public function execute()
- {
- $this->connect();
- if (!is_resource($this->connection))
- {
- $this->log(
- Log\LogLevel::ERROR,
- 'Database query failed (error #{code}): {message}',
- array('code' => $this->errorNum, 'message' => $this->errorMsg)
- );
- throw new \RuntimeException($this->errorMsg, $this->errorNum);
- }
- // Take a local copy so that we don't modify the original query and cause issues later
- $sql = $this->replacePrefix((string) $this->sql);
- if ($this->limit > 0 || $this->offset > 0)
- {
- $sql = $this->limit($sql, $this->limit, $this->offset);
- }
- // Increment the query counter.
- $this->count++;
- // If debugging is enabled then let's log the query.
- if ($this->debug)
- {
- // Add the query to the object queue.
- $this->log(
- Log\LogLevel::DEBUG,
- '{sql}',
- array('sql' => $sql, 'category' => 'databasequery')
- );
- }
- // Reset the error values.
- $this->errorNum = 0;
- $this->errorMsg = '';
- // SQLSrv_num_rows requires a static or keyset cursor.
- if (strncmp(ltrim(strtoupper($sql)), 'SELECT', strlen('SELECT')) == 0)
- {
- $array = array('Scrollable' => SQLSRV_CURSOR_KEYSET);
- }
- else
- {
- $array = array();
- }
- // Execute the query. Error suppression is used here to prevent warnings/notices that the connection has been lost.
- $this->cursor = @sqlsrv_query($this->connection, $sql, array(), $array);
- // If an error occurred handle it.
- if (!$this->cursor)
- {
- // Check if the server was disconnected.
- if (!$this->connected())
- {
- try
- {
- // Attempt to reconnect.
- $this->connection = null;
- $this->connect();
- }
- catch (\RuntimeException $e)
- // If connect fails, ignore that exception and throw the normal exception.
- {
- // Get the error number and message.
- $errors = sqlsrv_errors();
- $this->errorNum = $errors[0]['SQLSTATE'];
- $this->errorMsg = $errors[0]['message'] . 'SQL=' . $sql;
- // Throw the normal query exception.
- $this->log(
- Log\LogLevel::ERROR,
- 'Database query failed (error #{code}): {message}',
- array('code' => $this->errorNum, 'message' => $this->errorMsg)
- );
- throw new \RuntimeException($this->errorMsg, $this->errorNum);
- }
- // Since we were able to reconnect, run the query again.
- return $this->execute();
- }
- else
- // The server was not disconnected.
- {
- // Get the error number and message.
- $errors = sqlsrv_errors();
- $this->errorNum = $errors[0]['SQLSTATE'];
- $this->errorMsg = $errors[0]['message'] . 'SQL=' . $sql;
- // Throw the normal query exception.
- $this->log(
- Log\LogLevel::ERROR,
- 'Database query failed (error #{code}): {message}',
- array('code' => $this->errorNum, 'message' => $this->errorMsg)
- );
- throw new \RuntimeException($this->errorMsg, $this->errorNum);
- }
- }
- return $this->cursor;
- }
- /**
- * This function replaces a string identifier <var>$prefix</var> with the string held is the
- * <var>tablePrefix</var> class variable.
- *
- * @param string $sql The SQL statement to prepare.
- * @param string $prefix The common table prefix.
- *
- * @return string The processed SQL statement.
- *
- * @since 1.0
- */
- public function replacePrefix($sql, $prefix = '#__')
- {
- $escaped = false;
- $startPos = 0;
- $quoteChar = '';
- $literal = '';
- $sql = trim($sql);
- $n = strlen($sql);
- while ($startPos < $n)
- {
- $ip = strpos($sql, $prefix, $startPos);
- if ($ip === false)
- {
- break;
- }
- $j = strpos($sql, "N'", $startPos);
- $k = strpos($sql, '"', $startPos);
- if (($k !== false) && (($k < $j) || ($j === false)))
- {
- $quoteChar = '"';
- $j = $k;
- }
- else
- {
- $quoteChar = "'";
- }
- if ($j === false)
- {
- $j = $n;
- }
- $literal .= str_replace($prefix, $this->tablePrefix, substr($sql, $startPos, $j - $startPos));
- $startPos = $j;
- $j = $startPos + 1;
- if ($j >= $n)
- {
- break;
- }
- // Quote comes first, find end of quote
- while (true)
- {
- $k = strpos($sql, $quoteChar, $j);
- $escaped = false;
- if ($k === false)
- {
- break;
- }
- $l = $k - 1;
- while ($l >= 0 && $sql{$l} == '\\')
- {
- $l--;
- $escaped = !$escaped;
- }
- if ($escaped)
- {
- $j = $k + 1;
- continue;
- }
- break;
- }
- if ($k === false)
- {
- // Error in the query - no end quote; ignore it
- break;
- }
- $literal .= substr($sql, $startPos, $k - $startPos + 1);
- $startPos = $k + 1;
- }
- if ($startPos < $n)
- {
- $literal .= substr($sql, $startPos, $n - $startPos);
- }
- return $literal;
- }
- /**
- * Select a database for use.
- *
- * @param string $database The name of the database to select for use.
- *
- * @return boolean True if the database was successfully selected.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function select($database)
- {
- $this->connect();
- if (!$database)
- {
- return false;
- }
- if (!sqlsrv_query($this->connection, 'USE ' . $database, null, array('scrollable' => SQLSRV_CURSOR_STATIC)))
- {
- throw new \RuntimeException('Could not connect to database');
- }
- return true;
- }
- /**
- * Set the connection to use UTF-8 character encoding.
- *
- * @return boolean True on success.
- *
- * @since 1.0
- */
- public function setUTF()
- {
- // TODO: Remove this?
- }
- /**
- * Method to commit a transaction.
- *
- * @param boolean $toSavepoint If true, commit to the last savepoint.
- *
- * @return void
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function transactionCommit($toSavepoint = false)
- {
- $this->connect();
- if (!$toSavepoint || $this->transactionDepth <= 1)
- {
- if ($this->setQuery('COMMIT TRANSACTION')->execute())
- {
- $this->transactionDepth = 0;
- }
- return;
- }
- $this->transactionDepth--;
- }
- /**
- * Method to roll back a transaction.
- *
- * @param boolean $toSavepoint If true, rollback to the last savepoint.
- *
- * @return void
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function transactionRollback($toSavepoint = false)
- {
- $this->connect();
- if (!$toSavepoint || $this->transactionDepth <= 1)
- {
- if ($this->setQuery('ROLLBACK TRANSACTION')->execute())
- {
- $this->transactionDepth = 0;
- }
- return;
- }
- $savepoint = 'SP_' . ($this->transactionDepth - 1);
- $this->setQuery('ROLLBACK TRANSACTION ' . $this->quoteName($savepoint));
- if ($this->execute())
- {
- $this->transactionDepth--;
- }
- }
- /**
- * Method to initialize a transaction.
- *
- * @param boolean $asSavepoint If true and a transaction is already active, a savepoint will be created.
- *
- * @return void
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function transactionStart($asSavepoint = false)
- {
- $this->connect();
- if (!$asSavepoint || !$this->transactionDepth)
- {
- if ($this->setQuery('BEGIN TRANSACTION')->execute())
- {
- $this->transactionDepth = 1;
- }
- return;
- }
- $savepoint = 'SP_' . $this->transactionDepth;
- $this->setQuery('BEGIN TRANSACTION ' . $this->quoteName($savepoint));
- if ($this->execute())
- {
- $this->transactionDepth++;
- }
- }
- /**
- * Method to fetch a row from the result set cursor as an array.
- *
- * @param mixed $cursor The optional result set cursor from which to fetch the row.
- *
- * @return mixed Either the next row from the result set or false if there are no more rows.
- *
- * @since 1.0
- */
- protected function fetchArray($cursor = null)
- {
- return sqlsrv_fetch_array($cursor ? $cursor : $this->cursor, SQLSRV_FETCH_NUMERIC);
- }
- /**
- * Method to fetch a row from the result set cursor as an associative array.
- *
- * @param mixed $cursor The optional result set cursor from which to fetch the row.
- *
- * @return mixed Either the next row from the result set or false if there are no more rows.
- *
- * @since 1.0
- */
- protected function fetchAssoc($cursor = null)
- {
- return sqlsrv_fetch_array($cursor ? $cursor : $this->cursor, SQLSRV_FETCH_ASSOC);
- }
- /**
- * Method to fetch a row from the result set cursor as an object.
- *
- * @param mixed $cursor The optional result set cursor from which to fetch the row.
- * @param string $class The class name to use for the returned row object.
- *
- * @return mixed Either the next row from the result set or false if there are no more rows.
- *
- * @since 1.0
- */
- protected function fetchObject($cursor = null, $class = 'stdClass')
- {
- return sqlsrv_fetch_object($cursor ? $cursor : $this->cursor, $class);
- }
- /**
- * Method to free up the memory used for the result set.
- *
- * @param mixed $cursor The optional result set cursor from which to fetch the row.
- *
- * @return void
- *
- * @since 1.0
- */
- protected function freeResult($cursor = null)
- {
- sqlsrv_free_stmt($cursor ? $cursor : $this->cursor);
- }
- /**
- * Method to check and see if a field exists in a table.
- *
- * @param string $table The table in which to verify the field.
- * @param string $field The field to verify.
- *
- * @return boolean True if the field exists in the table.
- *
- * @since 1.0
- */
- protected function checkFieldExists($table, $field)
- {
- $this->connect();
- $table = $this->replacePrefix((string) $table);
- $sql = "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS" . " WHERE TABLE_NAME = '$table' AND COLUMN_NAME = '$field'" .
- " ORDER BY ORDINAL_POSITION";
- $this->setQuery($sql);
- if ($this->loadResult())
- {
- return true;
- }
- else
- {
- return false;
- }
- }
- /**
- * Method to wrap an SQL statement to provide a LIMIT and OFFSET behavior for scrolling through a result set.
- *
- * @param string $sql The SQL statement to process.
- * @param integer $limit The maximum affected rows to set.
- * @param integer $offset The affected row offset to set.
- *
- * @return string The processed SQL statement.
- *
- * @since 1.0
- */
- protected function limit($sql, $limit, $offset)
- {
- $orderBy = stristr($sql, 'ORDER BY');
- if (is_null($orderBy) || empty($orderBy))
- {
- $orderBy = 'ORDER BY (select 0)';
- }
- $sql = str_ireplace($orderBy, '', $sql);
- $rowNumberText = ',ROW_NUMBER() OVER (' . $orderBy . ') AS RowNumber FROM ';
- $sql = preg_replace('/\\s+FROM/', '\\1 ' . $rowNumberText . ' ', $sql, 1);
- $sql = 'SELECT TOP ' . $this->limit . ' * FROM (' . $sql . ') _myResults WHERE RowNumber > ' . $this->offset;
- return $sql;
- }
- /**
- * Renames a table in the database.
- *
- * @param string $oldTable The name of the table to be renamed
- * @param string $newTable The new name for the table.
- * @param string $backup Table prefix
- * @param string $prefix For the table - used to rename constraints in non-mysql databases
- *
- * @return SqlsrvDriver Returns this object to support chaining.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function renameTable($oldTable, $newTable, $backup = null, $prefix = null)
- {
- $constraints = array();
- if (!is_null($prefix) && !is_null($backup))
- {
- $constraints = $this->getTableConstraints($oldTable);
- }
- if (!empty($constraints))
- {
- $this->renameConstraints($constraints, $prefix, $backup);
- }
- $this->setQuery("sp_rename '" . $oldTable . "', '" . $newTable . "'");
- return $this->execute();
- }
- /**
- * Locks a table in the database.
- *
- * @param string $tableName The name of the table to lock.
- *
- * @return SqlsrvDriver Returns this object to support chaining.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function lockTable($tableName)
- {
- return $this;
- }
- /**
- * Unlocks tables in the database.
- *
- * @return SqlsrvDriver Returns this object to support chaining.
- *
- * @since 1.0
- * @throws \RuntimeException
- */
- public function unlockTables()
- {
- return $this;
- }
- }