/**
* Rollback a transaction.
*
* @return void
*/
protected function _rollBack()
{
if (!db2_rollback($this->_connection)) {
/**
* @see Zend_Db_Adapter_Db2_Exception
*/
require_once 'Zend/Db/Adapter/Db2/Exception.php';
throw new Zend_Db_Adapter_Db2_Exception(db2_conn_errormsg($this->_connection), db2_conn_error($this->_connection));
}
$this->_setExecuteMode(DB2_AUTOCOMMIT_ON);
}
function RollbackTrans()
{
if ($this->transOff) {
return true;
}
if ($this->transCnt) {
$this->transCnt -= 1;
}
$this->_autocommit = true;
$ret = db2_rollback($this->_connectionID);
db2_autocommit($this->_connectionID, true);
return $ret;
}
/**
* Makes sure each database and extension handles BEGIN, COMMIT and ROLLBACK
*
* @param string &$sql The SQL to check for a transaction query
* @param string $result_class The type of result object to create
* @return mixed `FALSE` if normal processing should continue, otherwise an object of the type $result_class
*/
private function handleTransactionQueries(&$sql, $result_class)
{
// SQL Server supports transactions, but starts then with BEGIN TRANSACTION
if ($this->type == 'mssql' && preg_match('#^\\s*(begin|start(\\s+transaction)?)\\s*#i', $sql)) {
$sql = 'BEGIN TRANSACTION';
}
$begin = FALSE;
$commit = FALSE;
$rollback = FALSE;
// Track transactions since most databases don't support nesting
if (preg_match('#^\\s*(begin|start)(\\s+(transaction|work))?\\s*$#iD', $sql)) {
if ($this->inside_transaction) {
throw new fProgrammerException('A transaction is already in progress');
}
$this->inside_transaction = TRUE;
$begin = TRUE;
} elseif (preg_match('#^\\s*(commit)(\\s+(transaction|work))?\\s*$#iD', $sql)) {
if (!$this->inside_transaction) {
throw new fProgrammerException('There is no transaction in progress');
}
$this->inside_transaction = FALSE;
$commit = TRUE;
} elseif (preg_match('#^\\s*(rollback)(\\s+(transaction|work))?\\s*$#iD', $sql)) {
if (!$this->inside_transaction) {
throw new fProgrammerException('There is no transaction in progress');
}
$this->inside_transaction = FALSE;
$rollback = TRUE;
}
if (!$begin && !$commit && !$rollback) {
return FALSE;
}
// The PDO, OCI8 and SQLSRV extensions require special handling through methods and functions
$is_pdo = $this->extension == 'pdo';
$is_oci = $this->extension == 'oci8';
$is_sqlsrv = $this->extension == 'sqlsrv';
$is_ibm_db2 = $this->extension == 'ibm_db2';
if (!$is_pdo && !$is_oci && !$is_sqlsrv && !$is_ibm_db2) {
return FALSE;
}
$this->statement = $sql;
// PDO seems to act weird if you try to start transactions through a normal query call
if ($is_pdo) {
try {
$is_mssql = $this->type == 'mssql' && substr($this->database, 0, 4) != 'dsn:';
$is_oracle = $this->type == 'oracle' && substr($this->database, 0, 4) != 'dsn:';
if ($begin) {
// The SQL Server PDO object hasn't implemented transactions
if ($is_mssql) {
$this->connection->exec('BEGIN TRANSACTION');
} elseif ($is_oracle) {
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, FALSE);
} else {
$this->connection->beginTransaction();
}
} elseif ($commit) {
if ($is_mssql) {
$this->connection->exec('COMMIT');
} elseif ($is_oracle) {
$this->connection->exec('COMMIT');
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
} else {
$this->connection->commit();
}
} elseif ($rollback) {
if ($is_mssql) {
$this->connection->exec('ROLLBACK');
} elseif ($is_oracle) {
$this->connection->exec('ROLLBACK');
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
} else {
$this->connection->rollBack();
}
}
} catch (Exception $e) {
$db_type_map = array('db2' => 'DB2', 'mssql' => 'MSSQL', 'mysql' => 'MySQL', 'oracle' => 'Oracle', 'postgresql' => 'PostgreSQL', 'sqlite' => 'SQLite');
throw new fSQLException('%1$s error (%2$s) in %3$s', $db_type_map[$this->type], $e->getMessage(), $sql);
}
} elseif ($is_oci) {
if ($commit) {
oci_commit($this->connection);
} elseif ($rollback) {
oci_rollback($this->connection);
}
} elseif ($is_sqlsrv) {
if ($begin) {
sqlsrv_begin_transaction($this->connection);
} elseif ($commit) {
sqlsrv_commit($this->connection);
} elseif ($rollback) {
sqlsrv_rollback($this->connection);
}
} elseif ($is_ibm_db2) {
if ($begin) {
db2_autocommit($this->connection, FALSE);
} elseif ($commit) {
db2_commit($this->connection);
db2_autocommit($this->connection, TRUE);
} elseif ($rollback) {
db2_rollback($this->connection);
db2_autocommit($this->connection, TRUE);
}
}
if ($result_class) {
$result = new $result_class($this);
$result->setSQL($sql);
$result->setResult(TRUE);
return $result;
}
return TRUE;
}
function DBrollback()
{
global $DB;
$result = false;
switch ($DB['TYPE']) {
case ZBX_DB_MYSQL:
$result = DBexecute('ROLLBACK');
break;
case ZBX_DB_POSTGRESQL:
$result = DBexecute('ROLLBACK');
break;
case ZBX_DB_ORACLE:
$result = oci_rollback($DB['DB']);
break;
case ZBX_DB_DB2:
$result = db2_rollback($DB['DB']);
db2_autocommit($DB['DB'], DB2_AUTOCOMMIT_ON);
break;
case ZBX_DB_SQLITE3:
$result = DBexecute('ROLLBACK');
unlock_sqlite3_access();
break;
}
return $result;
}
/**
* This function rollbacks a transaction.
*
* @access public
* @override
* @throws Throwable_SQL_Exception indicates that the executed
* statement failed
*
* @see http://www.php.net/manual/en/function.db2-rollback.php
*/
public function rollback()
{
if (!$this->is_connected()) {
throw new Throwable_SQL_Exception('Message: Failed to rollback SQL transaction. Reason: Unable to find connection.');
}
$command = @db2_rollback($this->resource);
if ($command === FALSE) {
throw new Throwable_SQL_Exception('Message: Failed to rollback SQL transaction. Reason: :reason', array(':reason' => @db2_conn_error($this->resource)));
}
@db2_autocommit($this->resource, DB2_AUTOCOMMIT_ON);
$this->sql = 'ROLLBACK;';
}
/**
* Makes sure each database and extension handles BEGIN, COMMIT and ROLLBACK
*
* @param string|fStatement &$statement The SQL to check for a transaction query
* @param string $result_class The type of result object to create
* @return mixed `FALSE` if normal processing should continue, otherwise an object of the type $result_class
*/
private function handleTransactionQueries(&$statement, $result_class)
{
if (is_object($statement)) {
$sql = $statement->getSQL();
} else {
$sql = $statement;
}
// SQL Server supports transactions, but the statements are slightly different.
// For the interest of convenience, we do simple transaction right here.
if ($this->type == 'mssql') {
if (preg_match('#^\\s*(BEGIN|START(\\s+TRANSACTION)?)\\s*$#i', $sql)) {
$statement = 'BEGIN TRANSACTION';
} elseif (preg_match('#^\\s*SAVEPOINT\\s+("?\\w+"?)\\s*$#i', $sql, $match)) {
$statement = 'SAVE TRANSACTION ' . $match[1];
} elseif (preg_match('#^\\s*ROLLBACK\\s+TO\\s+SAVEPOINT\\s+("?\\w+"?)\\s*$#i', $sql, $match)) {
$statement = 'ROLLBACK TRANSACTION ' . $match[1];
}
}
$begin = FALSE;
$commit = FALSE;
$rollback = FALSE;
// Track transactions since most databases don't support nesting
if (preg_match('#^\\s*(BEGIN|START)(\\s+(TRAN|TRANSACTION|WORK))?\\s*$#iD', $sql)) {
if ($this->inside_transaction) {
throw new fProgrammerException('A transaction is already in progress');
}
$this->inside_transaction = TRUE;
$begin = TRUE;
} elseif (preg_match('#^\\s*COMMIT(\\s+(TRAN|TRANSACTION|WORK))?\\s*$#iD', $sql)) {
if (!$this->inside_transaction) {
throw new fProgrammerException('There is no transaction in progress');
}
$this->inside_transaction = FALSE;
$commit = TRUE;
} elseif (preg_match('#^\\s*ROLLBACK(\\s+(TRAN|TRANSACTION|WORK))?\\s*$#iD', $sql)) {
if (!$this->inside_transaction) {
throw new fProgrammerException('There is no transaction in progress');
}
$this->inside_transaction = FALSE;
$rollback = TRUE;
// MySQL needs to use this construct for starting transactions when using LOCK tables
} elseif ($this->type == 'mysql' && preg_match('#^\\s*SET\\s+autocommit\\s*=\\s*(0|1)#i', $sql, $match)) {
$this->inside_transaction = TRUE;
if ($match[1] == '0') {
$this->schema_info['mysql_autocommit'] = TRUE;
} else {
unset($this->schema_info['mysql_autocommit']);
}
// We have to track LOCK TABLES for MySQL because UNLOCK TABLES only implicitly commits if LOCK TABLES was used
} elseif ($this->type == 'mysql' && preg_match('#^\\s*LOCK\\s+TABLES#i', $sql)) {
// This command always implicitly commits
$this->inside_transaction = FALSE;
$this->schema_info['mysql_lock_tables'] = TRUE;
// MySQL has complex handling of UNLOCK TABLES
} elseif ($this->type == 'mysql' && preg_match('#^\\s*UNLOCK\\s+TABLES#i', $sql)) {
// This command only implicitly commits if LOCK TABLES was used
if (isset($this->schema_info['mysql_lock_tables'])) {
$this->inside_transaction = FALSE;
}
unset($this->schema_info['mysql_lock_tables']);
// These databases issue implicit commit commands when the following statements are run
} elseif ($this->type == 'mysql' && preg_match('#^\\s*(ALTER|CREATE(?!\\s+TEMPORARY)|DROP|RENAME|TRUNCATE|LOAD|UNLOCK|GRANT|REVOKE|SET\\s+PASSWORD|CACHE|ANALYSE|CHECK|OPTIMIZE|REPAIR|FLUSH|RESET)\\b#i', $sql)) {
$this->inside_transaction = FALSE;
} elseif ($this->type == 'oracle' && preg_match('#^\\s*(CREATE|ALTER|DROP|TRUNCATE|GRANT|REVOKE|REPLACE|ANALYZE|AUDIT|COMMENT)\\b#i', $sql)) {
$this->inside_transaction = FALSE;
} elseif ($this->type == 'db2' && preg_match('#^\\s*CALL\\s+SYSPROC\\.ADMIN_CMD\\(\'REORG\\s+TABLE\\b#i', $sql)) {
$this->inside_transaction = FALSE;
// It appears PDO tracks the transactions, but doesn't know about implicit commits
if ($this->extension == 'pdo') {
$this->connection->commit();
}
}
// If MySQL autocommit it set to 0 a new transaction is automatically started
if (!empty($this->schema_info['mysql_autocommit'])) {
$this->inside_transaction = TRUE;
}
if (!$begin && !$commit && !$rollback) {
return FALSE;
}
// The PDO, OCI8 and SQLSRV extensions require special handling through methods and functions
$is_pdo = $this->extension == 'pdo';
$is_oci = $this->extension == 'oci8';
$is_sqlsrv = $this->extension == 'sqlsrv';
$is_ibm_db2 = $this->extension == 'ibm_db2';
if (!$is_pdo && !$is_oci && !$is_sqlsrv && !$is_ibm_db2) {
return FALSE;
}
$this->statement = $statement;
// PDO seems to act weird if you try to start transactions through a normal query call
if ($is_pdo) {
try {
$is_mssql = $this->type == 'mssql';
$is_oracle = $this->type == 'oracle';
if ($begin) {
// The SQL Server PDO object hasn't implemented transactions
if ($is_mssql) {
$this->connection->exec('BEGIN TRANSACTION');
} elseif ($is_oracle) {
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, FALSE);
} else {
$this->connection->beginTransaction();
}
} elseif ($commit) {
if ($is_mssql) {
$this->connection->exec('COMMIT');
} elseif ($is_oracle) {
$this->connection->exec('COMMIT');
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
} else {
$this->connection->commit();
}
} elseif ($rollback) {
if ($is_mssql) {
$this->connection->exec('ROLLBACK');
} elseif ($is_oracle) {
$this->connection->exec('ROLLBACK');
$this->connection->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
} else {
$this->connection->rollBack();
}
}
} catch (Exception $e) {
$db_type_map = array('db2' => 'DB2', 'mssql' => 'MSSQL', 'mysql' => 'MySQL', 'oracle' => 'Oracle', 'postgresql' => 'PostgreSQL', 'sqlite' => 'SQLite');
throw new fSQLException('%1$s error (%2$s) in %3$s', $db_type_map[$this->type], $e->getMessage(), $sql);
}
} elseif ($is_oci) {
if ($commit) {
oci_commit($this->connection);
} elseif ($rollback) {
oci_rollback($this->connection);
}
} elseif ($is_sqlsrv) {
if ($begin) {
sqlsrv_begin_transaction($this->connection);
} elseif ($commit) {
sqlsrv_commit($this->connection);
} elseif ($rollback) {
sqlsrv_rollback($this->connection);
}
} elseif ($is_ibm_db2) {
if ($begin) {
db2_autocommit($this->connection, FALSE);
} elseif ($commit) {
db2_commit($this->connection);
db2_autocommit($this->connection, TRUE);
} elseif ($rollback) {
db2_rollback($this->connection);
db2_autocommit($this->connection, TRUE);
}
}
if ($result_class) {
$result = new $result_class($this);
$result->setSQL($sql);
$result->setResult(TRUE);
return $result;
}
return TRUE;
}
/**
* Rollback a transaction
*
* @param unknown_type $model
* @return boolean True on success, false on fail
* (i.e. if the database/model does not support transactions,
* or a transaction has not started).
*/
function rollback(&$model)
{
if (parent::rollback($model)) {
$this->_transactionStarted = false;
db2_autocommit($this->connection, DB2_AUTOCOMMIT_ON);
return db2_rollback($this->connection);
}
return false;
}
/**
* Rollback a transaction.
*
* @return void
*/
protected function _rollBack()
{
if (!db2_rollback($this->_connection)) {
throw new Db2Exception(db2_conn_errormsg($this->_connection), db2_conn_error($this->_connection));
}
$this->_setExecuteMode(Db2_AUTOCOMMIT_ON);
}
/**
* Cancel a transaction
*/
protected function doRollback($fname = 'DatabaseIbm_db2::rollback')
{
db2_rollback($this->mConn);
// turn auto-commit back on
// not sure if this is appropriate
db2_autocommit($this->mConn, DB2_AUTOCOMMIT_ON);
$this->mTrxLevel = 0;
}
function rollBack()
{
if (!db2_rollback($this->_conn)) {
throw new DB2Exception(db2_conn_errormsg($this->_conn));
}
db2_autocommit($this->_conn, DB2_AUTOCOMMIT_ON);
}
/**
* Rollsback pending changes to the database when the driver is setup to support transactions.
*
* @return bool true if rollback succeeded, false if it failed
*/
public function rollback()
{
if ($this->database) {
$success = db2_rollback($this->database);
$this->log->info("IBMDB2Manager.rollback(): {$success}");
return $success;
}
return false;
}
public static function rollBack($conn)
{
return db2_rollback($conn);
}
/**
* Rollback
*
* @return Connection
*/
public function rollback()
{
if (!$this->isConnected()) {
throw new Exception\RuntimeException('Must be connected before you can rollback.');
}
if (!$this->inTransaction()) {
throw new Exception\RuntimeException('Must call beginTransaction() before you can rollback.');
}
if (!db2_rollback($this->resource)) {
throw new Exception\RuntimeException('The rollback has not been successful');
}
if ($this->prevAutocommit) {
db2_autocommit($this->resource, $this->prevAutocommit);
}
$this->inTransaction = false;
return $this;
}
/**
* Cancel a transaction
*/
public function rollback()
{
db2_rollback($this->mConn);
// turn auto-commit back on
// not sure if this is appropriate
db2_autocommit($this->mConn, DB2_AUTOCOMMIT_ON);
$this->mTrxLevel = 0;
}
protected function _rollback()
{
return db2_rollback($this->handle);
}
function DBrollback()
{
global $DB;
$result = false;
if (isset($DB['DB']) && !empty($DB['DB'])) {
switch ($DB['TYPE']) {
case 'MYSQL':
$result = DBexecute('rollback');
break;
case 'POSTGRESQL':
$result = DBexecute('rollback');
break;
case 'ORACLE':
$result = ocirollback($DB['DB']);
break;
case 'IBM_DB2':
$result = db2_rollback($DB['DB']);
db2_autocommit($DB['DB'], DB2_AUTOCOMMIT_ON);
break;
case 'SQLITE3':
$result = DBexecute('rollback');
unlock_db_access();
break;
}
}
return $result;
}
