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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Db
* @subpackage Adapter
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Oracle.php 19048 2009-11-19 18:15:05Z mikaelkael $
*/
/**
* @see Zend_Db_Adapter_Abstract
*/
require_once 'Zend/Db/Adapter/Abstract.php';
/**
* @see Zend_Db_Statement_Oracle
*/
require_once 'Zend/Db/Statement/Oracle.php';
/**
* @category Zend
* @package Zend_Db
* @subpackage Adapter
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Db_Adapter_Oracle extends Zend_Db_Adapter_Abstract
{
/**
* User-provided configuration.
*
* Basic keys are:
*
* username => (string) Connect to the database as this username.
* password => (string) Password associated with the username.
* dbname => Either the name of the local Oracle instance, or the
* name of the entry in tnsnames.ora to which you want to connect.
* persistent => (boolean) Set TRUE to use a persistent connection
* @var array
*/
protected $_config = array(
'dbname' => null,
'username' => null,
'password' => null,
'persistent' => false
);
/**
* Keys are UPPERCASE SQL datatypes or the constants
* Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
*
* Values are:
* 0 = 32-bit integer
* 1 = 64-bit integer
* 2 = float or decimal
*
* @var array Associative array of datatypes to values 0, 1, or 2.
*/
protected $_numericDataTypes = array(
Zend_Db::INT_TYPE => Zend_Db::INT_TYPE,
Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
Zend_Db::FLOAT_TYPE => Zend_Db::FLOAT_TYPE,
'BINARY_DOUBLE' => Zend_Db::FLOAT_TYPE,
'BINARY_FLOAT' => Zend_Db::FLOAT_TYPE,
'NUMBER' => Zend_Db::FLOAT_TYPE,
);
/**
* @var integer
*/
protected $_execute_mode = null;
/**
* Default class name for a DB statement.
*
* @var string
*/
protected $_defaultStmtClass = 'Zend_Db_Statement_Oracle';
/**
* Check if LOB field are returned as string
* instead of OCI-Lob object
*
* @var boolean
*/
protected $_lobAsString = null;
/**
* Creates a connection resource.
*
* @return void
* @throws Zend_Db_Adapter_Oracle_Exception
*/
protected function _connect()
{
if (is_resource($this->_connection)) {
// connection already exists
return;
}
if (!extension_loaded('oci8')) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception('The OCI8 extension is required for this adapter but the extension is not loaded');
}
$this->_setExecuteMode(OCI_COMMIT_ON_SUCCESS);
$connectionFuncName = ($this->_config['persistent'] == true) ? 'oci_pconnect' : 'oci_connect';
$this->_connection = @$connectionFuncName(
$this->_config['username'],
$this->_config['password'],
$this->_config['dbname'],
$this->_config['charset']);
// check the connection
if (!$this->_connection) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception(oci_error());
}
}
/**
* Test if a connection is active
*
* @return boolean
*/
public function isConnected()
{
return ((bool) (is_resource($this->_connection)
&& get_resource_type($this->_connection) == 'oci8 connection'));
}
/**
* Force the connection to close.
*
* @return void
*/
public function closeConnection()
{
if ($this->isConnected()) {
oci_close($this->_connection);
}
$this->_connection = null;
}
/**
* Activate/deactivate return of LOB as string
*
* @param string $lob_as_string
* @return Zend_Db_Adapter_Oracle
*/
public function setLobAsString($lobAsString)
{
$this->_lobAsString = (bool) $lobAsString;
return $this;
}
/**
* Return whether or not LOB are returned as string
*
* @return boolean
*/
public function getLobAsString()
{
if ($this->_lobAsString === null) {
// if never set by user, we use driver option if it exists otherwise false
if (isset($this->_config['driver_options']) &&
isset($this->_config['driver_options']['lob_as_string'])) {
$this->_lobAsString = (bool) $this->_config['driver_options']['lob_as_string'];
} else {
$this->_lobAsString = false;
}
}
return $this->_lobAsString;
}
/**
* Returns an SQL statement for preparation.
*
* @param string $sql The SQL statement with placeholders.
* @return Zend_Db_Statement_Oracle
*/
public function prepare($sql)
{
$this->_connect();
$stmtClass = $this->_defaultStmtClass;
if (!class_exists($stmtClass)) {
require_once 'Zend/Loader.php';
Zend_Loader::loadClass($stmtClass);
}
$stmt = new $stmtClass($this, $sql);
if ($stmt instanceof Zend_Db_Statement_Oracle) {
$stmt->setLobAsString($this->getLobAsString());
}
$stmt->setFetchMode($this->_fetchMode);
return $stmt;
}
/**
* Quote a raw string.
*
* @param string $value Raw string
* @return string Quoted string
*/
protected function _quote($value)
{
if (is_int($value) || is_float($value)) {
return $value;
}
$value = str_replace("'", "''", $value);
return "'" . addcslashes($value, "\000\n\r\\\032") . "'";
}
/**
* Quote a table identifier and alias.
*
* @param string|array|Zend_Db_Expr $ident The identifier or expression.
* @param string $alias An alias for the table.
* @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
* @return string The quoted identifier and alias.
*/
public function quoteTableAs($ident, $alias = null, $auto = false)
{
// Oracle doesn't allow the 'AS' keyword between the table identifier/expression and alias.
return $this->_quoteIdentifierAs($ident, $alias, $auto, ' ');
}
/**
* Return the most recent value from the specified sequence in the database.
* This is supported only on RDBMS brands that support sequences
* (e.g. Oracle, PostgreSQL, DB2). Other RDBMS brands return null.
*
* @param string $sequenceName
* @return string
*/
public function lastSequenceId($sequenceName)
{
$this->_connect();
$sql = 'SELECT '.$this->quoteIdentifier($sequenceName, true).'.CURRVAL FROM dual';
$value = $this->fetchOne($sql);
return $value;
}
/**
* Generate a new value from the specified sequence in the database, and return it.
* This is supported only on RDBMS brands that support sequences
* (e.g. Oracle, PostgreSQL, DB2). Other RDBMS brands return null.
*
* @param string $sequenceName
* @return string
*/
public function nextSequenceId($sequenceName)
{
$this->_connect();
$sql = 'SELECT '.$this->quoteIdentifier($sequenceName, true).'.NEXTVAL FROM dual';
$value = $this->fetchOne($sql);
return $value;
}
/**
* Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
*
* As a convention, on RDBMS brands that support sequences
* (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
* from the arguments and returns the last id generated by that sequence.
* On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
* returns the last value generated for such a column, and the table name
* argument is disregarded.
*
* Oracle does not support IDENTITY columns, so if the sequence is not
* specified, this method returns null.
*
* @param string $tableName OPTIONAL Name of table.
* @param string $primaryKey OPTIONAL Name of primary key column.
* @return string
*/
public function lastInsertId($tableName = null, $primaryKey = null)
{
if ($tableName !== null) {
$sequenceName = $tableName;
if ($primaryKey) {
$sequenceName .= "_$primaryKey";
}
$sequenceName .= '_seq';
return $this->lastSequenceId($sequenceName);
}
// No support for IDENTITY columns; return null
return null;
}
/**
* Returns a list of the tables in the database.
*
* @return array
*/
public function listTables()
{
$this->_connect();
$data = $this->fetchCol('SELECT table_name FROM all_tables');
return $data;
}
/**
* Returns the column descriptions for a table.
*
* The return value is an associative array keyed by the column name,
* as returned by the RDBMS.
*
* The value of each array element is an associative array
* with the following keys:
*
* SCHEMA_NAME => string; name of schema
* TABLE_NAME => string;
* COLUMN_NAME => string; column name
* COLUMN_POSITION => number; ordinal position of column in table
* DATA_TYPE => string; SQL datatype name of column
* DEFAULT => string; default expression of column, null if none
* NULLABLE => boolean; true if column can have nulls
* LENGTH => number; length of CHAR/VARCHAR
* SCALE => number; scale of NUMERIC/DECIMAL
* PRECISION => number; precision of NUMERIC/DECIMAL
* UNSIGNED => boolean; unsigned property of an integer type
* PRIMARY => boolean; true if column is part of the primary key
* PRIMARY_POSITION => integer; position of column in primary key
* IDENTITY => integer; true if column is auto-generated with unique values
*
* @todo Discover integer unsigned property.
*
* @param string $tableName
* @param string $schemaName OPTIONAL
* @return array
*/
public function describeTable($tableName, $schemaName = null)
{
$version = $this->getServerVersion();
if (($version === null) || version_compare($version, '9.0.0', '>=')) {
$sql = "SELECT TC.TABLE_NAME, TC.OWNER, TC.COLUMN_NAME, TC.DATA_TYPE,
TC.DATA_DEFAULT, TC.NULLABLE, TC.COLUMN_ID, TC.DATA_LENGTH,
TC.DATA_SCALE, TC.DATA_PRECISION, C.CONSTRAINT_TYPE, CC.POSITION
FROM ALL_TAB_COLUMNS TC
LEFT JOIN (ALL_CONS_COLUMNS CC JOIN ALL_CONSTRAINTS C
ON (CC.CONSTRAINT_NAME = C.CONSTRAINT_NAME AND CC.TABLE_NAME = C.TABLE_NAME AND CC.OWNER = C.OWNER AND C.CONSTRAINT_TYPE = 'P'))
ON TC.TABLE_NAME = CC.TABLE_NAME AND TC.COLUMN_NAME = CC.COLUMN_NAME
WHERE UPPER(TC.TABLE_NAME) = UPPER(:TBNAME)";
$bind[':TBNAME'] = $tableName;
if ($schemaName) {
$sql .= ' AND UPPER(TC.OWNER) = UPPER(:SCNAME)';
$bind[':SCNAME'] = $schemaName;
}
$sql .= ' ORDER BY TC.COLUMN_ID';
} else {
$subSql="SELECT AC.OWNER, AC.TABLE_NAME, ACC.COLUMN_NAME, AC.CONSTRAINT_TYPE, ACC.POSITION
from ALL_CONSTRAINTS AC, ALL_CONS_COLUMNS ACC
WHERE ACC.CONSTRAINT_NAME = AC.CONSTRAINT_NAME
AND ACC.TABLE_NAME = AC.TABLE_NAME
AND ACC.OWNER = AC.OWNER
AND AC.CONSTRAINT_TYPE = 'P'
AND UPPER(AC.TABLE_NAME) = UPPER(:TBNAME)";
$bind[':TBNAME'] = $tableName;
if ($schemaName) {
$subSql .= ' AND UPPER(ACC.OWNER) = UPPER(:SCNAME)';
$bind[':SCNAME'] = $schemaName;
}
$sql="SELECT TC.TABLE_NAME, TC.OWNER, TC.COLUMN_NAME, TC.DATA_TYPE,
TC.DATA_DEFAULT, TC.NULLABLE, TC.COLUMN_ID, TC.DATA_LENGTH,
TC.DATA_SCALE, TC.DATA_PRECISION, CC.CONSTRAINT_TYPE, CC.POSITION
FROM ALL_TAB_COLUMNS TC, ($subSql) CC
WHERE UPPER(TC.TABLE_NAME) = UPPER(:TBNAME)
AND TC.OWNER = CC.OWNER(+) AND TC.TABLE_NAME = CC.TABLE_NAME(+) AND TC.COLUMN_NAME = CC.COLUMN_NAME(+)";
if ($schemaName) {
$sql .= ' AND UPPER(TC.OWNER) = UPPER(:SCNAME)';
}
$sql .= ' ORDER BY TC.COLUMN_ID';
}
$stmt = $this->query($sql, $bind);
/**
* Use FETCH_NUM so we are not dependent on the CASE attribute of the PDO connection
*/
$result = $stmt->fetchAll(Zend_Db::FETCH_NUM);
$table_name = 0;
$owner = 1;
$column_name = 2;
$data_type = 3;
$data_default = 4;
$nullable = 5;
$column_id = 6;
$data_length = 7;
$data_scale = 8;
$data_precision = 9;
$constraint_type = 10;
$position = 11;
$desc = array();
foreach ($result as $key => $row) {
list ($primary, $primaryPosition, $identity) = array(false, null, false);
if ($row[$constraint_type] == 'P') {
$primary = true;
$primaryPosition = $row[$position];
/**
* Oracle does not support auto-increment keys.
*/
$identity = false;
}
$desc[$this->foldCase($row[$column_name])] = array(
'SCHEMA_NAME' => $this->foldCase($row[$owner]),
'TABLE_NAME' => $this->foldCase($row[$table_name]),
'COLUMN_NAME' => $this->foldCase($row[$column_name]),
'COLUMN_POSITION' => $row[$column_id],
'DATA_TYPE' => $row[$data_type],
'DEFAULT' => $row[$data_default],
'NULLABLE' => (bool) ($row[$nullable] == 'Y'),
'LENGTH' => $row[$data_length],
'SCALE' => $row[$data_scale],
'PRECISION' => $row[$data_precision],
'UNSIGNED' => null, // @todo
'PRIMARY' => $primary,
'PRIMARY_POSITION' => $primaryPosition,
'IDENTITY' => $identity
);
}
return $desc;
}
/**
* Leave autocommit mode and begin a transaction.
*
* @return void
*/
protected function _beginTransaction()
{
$this->_setExecuteMode(OCI_DEFAULT);
}
/**
* Commit a transaction and return to autocommit mode.
*
* @return void
* @throws Zend_Db_Adapter_Oracle_Exception
*/
protected function _commit()
{
if (!oci_commit($this->_connection)) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception(oci_error($this->_connection));
}
$this->_setExecuteMode(OCI_COMMIT_ON_SUCCESS);
}
/**
* Roll back a transaction and return to autocommit mode.
*
* @return void
* @throws Zend_Db_Adapter_Oracle_Exception
*/
protected function _rollBack()
{
if (!oci_rollback($this->_connection)) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception(oci_error($this->_connection));
}
$this->_setExecuteMode(OCI_COMMIT_ON_SUCCESS);
}
/**
* Set the fetch mode.
*
* @todo Support FETCH_CLASS and FETCH_INTO.
*
* @param integer $mode A fetch mode.
* @return void
* @throws Zend_Db_Adapter_Oracle_Exception
*/
public function setFetchMode($mode)
{
switch ($mode) {
case Zend_Db::FETCH_NUM: // seq array
case Zend_Db::FETCH_ASSOC: // assoc array
case Zend_Db::FETCH_BOTH: // seq+assoc array
case Zend_Db::FETCH_OBJ: // object
$this->_fetchMode = $mode;
break;
case Zend_Db::FETCH_BOUND: // bound to PHP variable
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception('FETCH_BOUND is not supported yet');
break;
default:
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception("Invalid fetch mode '$mode' specified");
break;
}
}
/**
* Adds an adapter-specific LIMIT clause to the SELECT statement.
*
* @param string $sql
* @param integer $count
* @param integer $offset OPTIONAL
* @return string
* @throws Zend_Db_Adapter_Oracle_Exception
*/
public function limit($sql, $count, $offset = 0)
{
$count = intval($count);
if ($count <= 0) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception("LIMIT argument count=$count is not valid");
}
$offset = intval($offset);
if ($offset < 0) {
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception("LIMIT argument offset=$offset is not valid");
}
/**
* Oracle does not implement the LIMIT clause as some RDBMS do.
* We have to simulate it with subqueries and ROWNUM.
* Unfortunately because we use the column wildcard "*",
* this puts an extra column into the query result set.
*/
$limit_sql = "SELECT z2.*
FROM (
SELECT z1.*, ROWNUM AS \"zend_db_rownum\"
FROM (
" . $sql . "
) z1
) z2
WHERE z2.\"zend_db_rownum\" BETWEEN " . ($offset+1) . " AND " . ($offset+$count);
return $limit_sql;
}
/**
* @param integer $mode
* @throws Zend_Db_Adapter_Oracle_Exception
*/
private function _setExecuteMode($mode)
{
switch($mode) {
case OCI_COMMIT_ON_SUCCESS:
case OCI_DEFAULT:
case OCI_DESCRIBE_ONLY:
$this->_execute_mode = $mode;
break;
default:
/**
* @see Zend_Db_Adapter_Oracle_Exception
*/
require_once 'Zend/Db/Adapter/Oracle/Exception.php';
throw new Zend_Db_Adapter_Oracle_Exception("Invalid execution mode '$mode' specified");
break;
}
}
/**
* @return int
*/
public function _getExecuteMode()
{
return $this->_execute_mode;
}
/**
* Inserts a table row with specified data.
*
* Oracle does not support anonymous ('?') binds.
*
* @param mixed $table The table to insert data into.
* @param array $bind Column-value pairs.
* @return int The number of affected rows.
*/
public function insert($table, array $bind)
{
$i = 0;
// extract and quote col names from the array keys
$cols = array();
$vals = array();
foreach ($bind as $col => $val) {
$cols[] = $this->quoteIdentifier($col, true);
if ($val instanceof Zend_Db_Expr) {
$vals[] = $val->__toString();
unset($bind[$col]);
} else {
$vals[] = ':'.$col.$i;
unset($bind[$col]);
$bind[':'.$col.$i] = $val;
}
$i++;
}
// build the statement
$sql = "INSERT INTO "
. $this->quoteIdentifier($table, true)
. ' (' . implode(', ', $cols) . ') '
. 'VALUES (' . implode(', ', $vals) . ')';
// execute the statement and return the number of affected rows
$stmt = $this->query($sql, $bind);
$result = $stmt->rowCount();
return $result;
}
/**
* Check if the adapter supports real SQL parameters.
*
* @param string $type 'positional' or 'named'
* @return bool
*/
public function supportsParameters($type)
{
switch ($type) {
case 'named':
return true;
case 'positional':
default:
return false;
}
}
/**
* Retrieve server version in PHP style
*
* @return string
*/
public function getServerVersion()
{
$this->_connect();
$version = oci_server_version($this->_connection);
if ($version !== false) {
$matches = null;
if (preg_match('/((?:[0-9]{1,2}\.){1,3}[0-9]{1,2})/', $version, $matches)) {
return $matches[1];
} else {
return null;
}
} else {
return null;
}
}
}
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