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gnu-social/extlib/DB/oci8.php

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include external libs in a subdir to make install easier darcs-hash:20080822131714-84dde-6978424ded2ed1041a65142a25560654ac717fcd.gz
2008-08-22 09:17:14 -04:00
<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* The PEAR DB driver for PHP's oci8 extension
* for interacting with Oracle databases
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Database
* @package DB
* @author James L. Pine <jlp@valinux.com>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: oci8.php,v 1.116 2007/11/28 02:22:39 aharvey Exp $
* @link http://pear.php.net/package/DB
*/
/**
* Obtain the DB_common class so it can be extended from
*/
require_once 'DB/common.php';
/**
* The methods PEAR DB uses to interact with PHP's oci8 extension
* for interacting with Oracle databases
*
* Definitely works with versions 8 and 9 of Oracle.
*
* These methods overload the ones declared in DB_common.
*
* Be aware... OCIError() only appears to return anything when given a
* statement, so functions return the generic DB_ERROR instead of more
* useful errors that have to do with feedback from the database.
*
* @category Database
* @package DB
* @author James L. Pine <jlp@valinux.com>
* @author Daniel Convissor <danielc@php.net>
* @copyright 1997-2007 The PHP Group
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: 1.7.14RC1
* @link http://pear.php.net/package/DB
*/
class DB_oci8 extends DB_common
{
// {{{ properties
/**
* The DB driver type (mysql, oci8, odbc, etc.)
* @var string
*/
var $phptype = 'oci8';
/**
* The database syntax variant to be used (db2, access, etc.), if any
* @var string
*/
var $dbsyntax = 'oci8';
/**
* The capabilities of this DB implementation
*
* The 'new_link' element contains the PHP version that first provided
* new_link support for this DBMS. Contains false if it's unsupported.
*
* Meaning of the 'limit' element:
* + 'emulate' = emulate with fetch row by number
* + 'alter' = alter the query
* + false = skip rows
*
* @var array
*/
var $features = array(
'limit' => 'alter',
'new_link' => '5.0.0',
'numrows' => 'subquery',
'pconnect' => true,
'prepare' => true,
'ssl' => false,
'transactions' => true,
);
/**
* A mapping of native error codes to DB error codes
* @var array
*/
var $errorcode_map = array(
1 => DB_ERROR_CONSTRAINT,
900 => DB_ERROR_SYNTAX,
904 => DB_ERROR_NOSUCHFIELD,
913 => DB_ERROR_VALUE_COUNT_ON_ROW,
921 => DB_ERROR_SYNTAX,
923 => DB_ERROR_SYNTAX,
942 => DB_ERROR_NOSUCHTABLE,
955 => DB_ERROR_ALREADY_EXISTS,
1400 => DB_ERROR_CONSTRAINT_NOT_NULL,
1401 => DB_ERROR_INVALID,
1407 => DB_ERROR_CONSTRAINT_NOT_NULL,
1418 => DB_ERROR_NOT_FOUND,
1476 => DB_ERROR_DIVZERO,
1722 => DB_ERROR_INVALID_NUMBER,
2289 => DB_ERROR_NOSUCHTABLE,
2291 => DB_ERROR_CONSTRAINT,
2292 => DB_ERROR_CONSTRAINT,
2449 => DB_ERROR_CONSTRAINT,
12899 => DB_ERROR_INVALID,
);
/**
* The raw database connection created by PHP
* @var resource
*/
var $connection;
/**
* The DSN information for connecting to a database
* @var array
*/
var $dsn = array();
/**
* Should data manipulation queries be committed automatically?
* @var bool
* @access private
*/
var $autocommit = true;
/**
* Stores the $data passed to execute() in the oci8 driver
*
* Gets reset to array() when simpleQuery() is run.
*
* Needed in case user wants to call numRows() after prepare/execute
* was used.
*
* @var array
* @access private
*/
var $_data = array();
/**
* The result or statement handle from the most recently executed query
* @var resource
*/
var $last_stmt;
/**
* Is the given prepared statement a data manipulation query?
* @var array
* @access private
*/
var $manip_query = array();
/**
* Store of prepared SQL queries.
* @var array
* @access private
*/
var $_prepared_queries = array();
// }}}
// {{{ constructor
/**
* This constructor calls <kbd>$this->DB_common()</kbd>
*
* @return void
*/
function DB_oci8()
{
$this->DB_common();
}
// }}}
// {{{ connect()
/**
* Connect to the database server, log in and open the database
*
* Don't call this method directly. Use DB::connect() instead.
*
* If PHP is at version 5.0.0 or greater:
* + Generally, oci_connect() or oci_pconnect() are used.
* + But if the new_link DSN option is set to true, oci_new_connect()
* is used.
*
* When using PHP version 4.x, OCILogon() or OCIPLogon() are used.
*
* PEAR DB's oci8 driver supports the following extra DSN options:
* + charset The character set to be used on the connection.
* Only used if PHP is at version 5.0.0 or greater
* and the Oracle server is at 9.2 or greater.
* Available since PEAR DB 1.7.0.
* + new_link If set to true, causes subsequent calls to
* connect() to return a new connection link
* instead of the existing one. WARNING: this is
* not portable to other DBMS's.
* Available since PEAR DB 1.7.0.
*
* @param array $dsn the data source name
* @param bool $persistent should the connection be persistent?
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function connect($dsn, $persistent = false)
{
if (!PEAR::loadExtension('oci8')) {
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
}
$this->dsn = $dsn;
if ($dsn['dbsyntax']) {
$this->dbsyntax = $dsn['dbsyntax'];
}
// Backwards compatibility with DB < 1.7.0
if (empty($dsn['database']) && !empty($dsn['hostspec'])) {
$db = $dsn['hostspec'];
} else {
$db = $dsn['database'];
}
if (function_exists('oci_connect')) {
if (isset($dsn['new_link'])
&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true))
{
$connect_function = 'oci_new_connect';
} else {
$connect_function = $persistent ? 'oci_pconnect'
: 'oci_connect';
}
if (isset($this->dsn['port']) && $this->dsn['port']) {
$db = '//'.$db.':'.$this->dsn['port'];
}
$char = empty($dsn['charset']) ? null : $dsn['charset'];
$this->connection = @$connect_function($dsn['username'],
$dsn['password'],
$db,
$char);
$error = OCIError();
if (!empty($error) && $error['code'] == 12541) {
// Couldn't find TNS listener. Try direct connection.
$this->connection = @$connect_function($dsn['username'],
$dsn['password'],
null,
$char);
}
} else {
$connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';
if ($db) {
$this->connection = @$connect_function($dsn['username'],
$dsn['password'],
$db);
} elseif ($dsn['username'] || $dsn['password']) {
$this->connection = @$connect_function($dsn['username'],
$dsn['password']);
}
}
if (!$this->connection) {
$error = OCIError();
$error = (is_array($error)) ? $error['message'] : null;
return $this->raiseError(DB_ERROR_CONNECT_FAILED,
null, null, null,
$error);
}
return DB_OK;
}
// }}}
// {{{ disconnect()
/**
* Disconnects from the database server
*
* @return bool TRUE on success, FALSE on failure
*/
function disconnect()
{
if (function_exists('oci_close')) {
$ret = @oci_close($this->connection);
} else {
$ret = @OCILogOff($this->connection);
}
$this->connection = null;
return $ret;
}
// }}}
// {{{ simpleQuery()
/**
* Sends a query to the database server
*
* To determine how many rows of a result set get buffered using
* ocisetprefetch(), see the "result_buffering" option in setOptions().
* This option was added in Release 1.7.0.
*
* @param string the SQL query string
*
* @return mixed + a PHP result resrouce for successful SELECT queries
* + the DB_OK constant for other successful queries
* + a DB_Error object on failure
*/
function simpleQuery($query)
{
$this->_data = array();
$this->last_parameters = array();
$this->last_query = $query;
$query = $this->modifyQuery($query);
$result = @OCIParse($this->connection, $query);
if (!$result) {
return $this->oci8RaiseError();
}
if ($this->autocommit) {
$success = @OCIExecute($result,OCI_COMMIT_ON_SUCCESS);
} else {
$success = @OCIExecute($result,OCI_DEFAULT);
}
if (!$success) {
return $this->oci8RaiseError($result);
}
$this->last_stmt = $result;
if ($this->_checkManip($query)) {
return DB_OK;
} else {
@ocisetprefetch($result, $this->options['result_buffering']);
return $result;
}
}
// }}}
// {{{ nextResult()
/**
* Move the internal oracle result pointer to the next available result
*
* @param a valid oci8 result resource
*
* @access public
*
* @return true if a result is available otherwise return false
*/
function nextResult($result)
{
return false;
}
// }}}
// {{{ fetchInto()
/**
* Places a row from the result set into the given array
*
* Formating of the array and the data therein are configurable.
* See DB_result::fetchInto() for more information.
*
* This method is not meant to be called directly. Use
* DB_result::fetchInto() instead. It can't be declared "protected"
* because DB_result is a separate object.
*
* @param resource $result the query result resource
* @param array $arr the referenced array to put the data in
* @param int $fetchmode how the resulting array should be indexed
* @param int $rownum the row number to fetch (0 = first row)
*
* @return mixed DB_OK on success, NULL when the end of a result set is
* reached or on failure
*
* @see DB_result::fetchInto()
*/
function fetchInto($result, &$arr, $fetchmode, $rownum = null)
{
if ($rownum !== null) {
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
}
if ($fetchmode & DB_FETCHMODE_ASSOC) {
$moredata = @OCIFetchInto($result,$arr,OCI_ASSOC+OCI_RETURN_NULLS+OCI_RETURN_LOBS);
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE &&
$moredata)
{
$arr = array_change_key_case($arr, CASE_LOWER);
}
} else {
$moredata = OCIFetchInto($result,$arr,OCI_RETURN_NULLS+OCI_RETURN_LOBS);
}
if (!$moredata) {
return null;
}
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) {
$this->_rtrimArrayValues($arr);
}
if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) {
$this->_convertNullArrayValuesToEmpty($arr);
}
return DB_OK;
}
// }}}
// {{{ freeResult()
/**
* Deletes the result set and frees the memory occupied by the result set
*
* This method is not meant to be called directly. Use
* DB_result::free() instead. It can't be declared "protected"
* because DB_result is a separate object.
*
* @param resource $result PHP's query result resource
*
* @return bool TRUE on success, FALSE if $result is invalid
*
* @see DB_result::free()
*/
function freeResult($result)
{
return is_resource($result) ? OCIFreeStatement($result) : false;
}
/**
* Frees the internal resources associated with a prepared query
*
* @param resource $stmt the prepared statement's resource
* @param bool $free_resource should the PHP resource be freed too?
* Use false if you need to get data
* from the result set later.
*
* @return bool TRUE on success, FALSE if $result is invalid
*
* @see DB_oci8::prepare()
*/
function freePrepared($stmt, $free_resource = true)
{
if (!is_resource($stmt)) {
return false;
}
if ($free_resource) {
@ocifreestatement($stmt);
}
if (isset($this->prepare_types[(int)$stmt])) {
unset($this->prepare_types[(int)$stmt]);
unset($this->manip_query[(int)$stmt]);
} else {
return false;
}
return true;
}
// }}}
// {{{ numRows()
/**
* Gets the number of rows in a result set
*
* Only works if the DB_PORTABILITY_NUMROWS portability option
* is turned on.
*
* This method is not meant to be called directly. Use
* DB_result::numRows() instead. It can't be declared "protected"
* because DB_result is a separate object.
*
* @param resource $result PHP's query result resource
*
* @return int the number of rows. A DB_Error object on failure.
*
* @see DB_result::numRows(), DB_common::setOption()
*/
function numRows($result)
{
// emulate numRows for Oracle. yuck.
if ($this->options['portability'] & DB_PORTABILITY_NUMROWS &&
$result === $this->last_stmt)
{
$countquery = 'SELECT COUNT(*) FROM ('.$this->last_query.')';
$save_query = $this->last_query;
$save_stmt = $this->last_stmt;
$count = $this->query($countquery);
// Restore the last query and statement.
$this->last_query = $save_query;
$this->last_stmt = $save_stmt;
if (DB::isError($count) ||
DB::isError($row = $count->fetchRow(DB_FETCHMODE_ORDERED)))
{
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
}
return $row[0];
}
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
}
// }}}
// {{{ numCols()
/**
* Gets the number of columns in a result set
*
* This method is not meant to be called directly. Use
* DB_result::numCols() instead. It can't be declared "protected"
* because DB_result is a separate object.
*
* @param resource $result PHP's query result resource
*
* @return int the number of columns. A DB_Error object on failure.
*
* @see DB_result::numCols()
*/
function numCols($result)
{
$cols = @OCINumCols($result);
if (!$cols) {
return $this->oci8RaiseError($result);
}
return $cols;
}
// }}}
// {{{ prepare()
/**
* Prepares a query for multiple execution with execute().
*
* With oci8, this is emulated.
*
* prepare() requires a generic query as string like <code>
* INSERT INTO numbers VALUES (?, ?, ?)
* </code>. The <kbd>?</kbd> characters are placeholders.
*
* Three types of placeholders can be used:
* + <kbd>?</kbd> a quoted scalar value, i.e. strings, integers
* + <kbd>!</kbd> value is inserted 'as is'
* + <kbd>&</kbd> requires a file name. The file's contents get
* inserted into the query (i.e. saving binary
* data in a db)
*
* Use backslashes to escape placeholder characters if you don't want
* them to be interpreted as placeholders. Example: <code>
* "UPDATE foo SET col=? WHERE col='over \& under'"
* </code>
*
* @param string $query the query to be prepared
*
* @return mixed DB statement resource on success. DB_Error on failure.
*
* @see DB_oci8::execute()
*/
function prepare($query)
{
$tokens = preg_split('/((?<!\\\)[&?!])/', $query, -1,
PREG_SPLIT_DELIM_CAPTURE);
$binds = count($tokens) - 1;
$token = 0;
$types = array();
$newquery = '';
foreach ($tokens as $key => $val) {
switch ($val) {
case '?':
$types[$token++] = DB_PARAM_SCALAR;
unset($tokens[$key]);
break;
case '&':
$types[$token++] = DB_PARAM_OPAQUE;
unset($tokens[$key]);
break;
case '!':
$types[$token++] = DB_PARAM_MISC;
unset($tokens[$key]);
break;
default:
$tokens[$key] = preg_replace('/\\\([&?!])/', "\\1", $val);
if ($key != $binds) {
$newquery .= $tokens[$key] . ':bind' . $token;
} else {
$newquery .= $tokens[$key];
}
}
}
$this->last_query = $query;
$newquery = $this->modifyQuery($newquery);
if (!$stmt = @OCIParse($this->connection, $newquery)) {
return $this->oci8RaiseError();
}
$this->prepare_types[(int)$stmt] = $types;
$this->manip_query[(int)$stmt] = DB::isManip($query);
$this->_prepared_queries[(int)$stmt] = $newquery;
return $stmt;
}
// }}}
// {{{ execute()
/**
* Executes a DB statement prepared with prepare().
*
* To determine how many rows of a result set get buffered using
* ocisetprefetch(), see the "result_buffering" option in setOptions().
* This option was added in Release 1.7.0.
*
* @param resource $stmt a DB statement resource returned from prepare()
* @param mixed $data array, string or numeric data to be used in
* execution of the statement. Quantity of items
* passed must match quantity of placeholders in
* query: meaning 1 for non-array items or the
* quantity of elements in the array.
*
* @return mixed returns an oic8 result resource for successful SELECT
* queries, DB_OK for other successful queries.
* A DB error object is returned on failure.
*
* @see DB_oci8::prepare()
*/
function &execute($stmt, $data = array())
{
$data = (array)$data;
$this->last_parameters = $data;
$this->last_query = $this->_prepared_queries[(int)$stmt];
$this->_data = $data;
$types = $this->prepare_types[(int)$stmt];
if (count($types) != count($data)) {
$tmp = $this->raiseError(DB_ERROR_MISMATCH);
return $tmp;
}
$i = 0;
foreach ($data as $key => $value) {
if ($types[$i] == DB_PARAM_MISC) {
/*
* Oracle doesn't seem to have the ability to pass a
* parameter along unchanged, so strip off quotes from start
* and end, plus turn two single quotes to one single quote,
* in order to avoid the quotes getting escaped by
* Oracle and ending up in the database.
*/
$data[$key] = preg_replace("/^'(.*)'$/", "\\1", $data[$key]);
$data[$key] = str_replace("''", "'", $data[$key]);
} elseif ($types[$i] == DB_PARAM_OPAQUE) {
$fp = @fopen($data[$key], 'rb');
if (!$fp) {
$tmp = $this->raiseError(DB_ERROR_ACCESS_VIOLATION);
return $tmp;
}
$data[$key] = fread($fp, filesize($data[$key]));
fclose($fp);
} elseif ($types[$i] == DB_PARAM_SCALAR) {
// Floats have to be converted to a locale-neutral
// representation.
if (is_float($data[$key])) {
$data[$key] = $this->quoteFloat($data[$key]);
}
}
if (!@OCIBindByName($stmt, ':bind' . $i, $data[$key], -1)) {
$tmp = $this->oci8RaiseError($stmt);
return $tmp;
}
$this->last_query = preg_replace("/:bind$i/",$this->quoteSmart($data[$key]),$this->last_query,1);
$i++;
}
if ($this->autocommit) {
$success = @OCIExecute($stmt, OCI_COMMIT_ON_SUCCESS);
} else {
$success = @OCIExecute($stmt, OCI_DEFAULT);
}
if (!$success) {
$tmp = $this->oci8RaiseError($stmt);
return $tmp;
}
$this->last_stmt = $stmt;
if ($this->manip_query[(int)$stmt] || $this->_next_query_manip) {
$this->_last_query_manip = true;
$this->_next_query_manip = false;
$tmp = DB_OK;
} else {
$this->_last_query_manip = false;
@ocisetprefetch($stmt, $this->options['result_buffering']);
$tmp = new DB_result($this, $stmt);
}
return $tmp;
}
// }}}
// {{{ autoCommit()
/**
* Enables or disables automatic commits
*
* @param bool $onoff true turns it on, false turns it off
*
* @return int DB_OK on success. A DB_Error object if the driver
* doesn't support auto-committing transactions.
*/
function autoCommit($onoff = false)
{
$this->autocommit = (bool)$onoff;;
return DB_OK;
}
// }}}
// {{{ commit()
/**
* Commits the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function commit()
{
$result = @OCICommit($this->connection);
if (!$result) {
return $this->oci8RaiseError();
}
return DB_OK;
}
// }}}
// {{{ rollback()
/**
* Reverts the current transaction
*
* @return int DB_OK on success. A DB_Error object on failure.
*/
function rollback()
{
$result = @OCIRollback($this->connection);
if (!$result) {
return $this->oci8RaiseError();
}
return DB_OK;
}
// }}}
// {{{ affectedRows()
/**
* Determines the number of rows affected by a data maniuplation query
*
* 0 is returned for queries that don't manipulate data.
*
* @return int the number of rows. A DB_Error object on failure.
*/
function affectedRows()
{
if ($this->last_stmt === false) {
return $this->oci8RaiseError();
}
$result = @OCIRowCount($this->last_stmt);
if ($result === false) {
return $this->oci8RaiseError($this->last_stmt);
}
return $result;
}
// }}}
// {{{ modifyQuery()
/**
* Changes a query string for various DBMS specific reasons
*
* "SELECT 2+2" must be "SELECT 2+2 FROM dual" in Oracle.
*
* @param string $query the query string to modify
*
* @return string the modified query string
*
* @access protected
*/
function modifyQuery($query)
{
if (preg_match('/^\s*SELECT/i', $query) &&
!preg_match('/\sFROM\s/i', $query)) {
$query .= ' FROM dual';
}
return $query;
}
// }}}
// {{{ modifyLimitQuery()
/**
* Adds LIMIT clauses to a query string according to current DBMS standards
*
* @param string $query the query to modify
* @param int $from the row to start to fetching (0 = the first row)
* @param int $count the numbers of rows to fetch
* @param mixed $params array, string or numeric data to be used in
* execution of the statement. Quantity of items
* passed must match quantity of placeholders in
* query: meaning 1 placeholder for non-array
* parameters or 1 placeholder per array element.
*
* @return string the query string with LIMIT clauses added
*
* @access protected
*/
function modifyLimitQuery($query, $from, $count, $params = array())
{
// Let Oracle return the name of the columns instead of
// coding a "home" SQL parser
if (count($params)) {
$result = $this->prepare("SELECT * FROM ($query) "
. 'WHERE NULL = NULL');
$tmp = $this->execute($result, $params);
} else {
$q_fields = "SELECT * FROM ($query) WHERE NULL = NULL";
if (!$result = @OCIParse($this->connection, $q_fields)) {
$this->last_query = $q_fields;
return $this->oci8RaiseError();
}
if (!@OCIExecute($result, OCI_DEFAULT)) {
$this->last_query = $q_fields;
return $this->oci8RaiseError($result);
}
}
$ncols = OCINumCols($result);
$cols = array();
for ( $i = 1; $i <= $ncols; $i++ ) {
$cols[] = '"' . OCIColumnName($result, $i) . '"';
}
$fields = implode(', ', $cols);
// XXX Test that (tip by John Lim)
//if (preg_match('/^\s*SELECT\s+/is', $query, $match)) {
// // Introduce the FIRST_ROWS Oracle query optimizer
// $query = substr($query, strlen($match[0]), strlen($query));
// $query = "SELECT /* +FIRST_ROWS */ " . $query;
//}
// Construct the query
// more at: http://marc.theaimsgroup.com/?l=php-db&m=99831958101212&w=2
// Perhaps this could be optimized with the use of Unions
$query = "SELECT $fields FROM".
" (SELECT rownum as linenum, $fields FROM".
" ($query)".
' WHERE rownum <= '. ($from + $count) .
') WHERE linenum >= ' . ++$from;
return $query;
}
// }}}
// {{{ nextId()
/**
* Returns the next free id in a sequence
*
* @param string $seq_name name of the sequence
* @param boolean $ondemand when true, the seqence is automatically
* created if it does not exist
*
* @return int the next id number in the sequence.
* A DB_Error object on failure.
*
* @see DB_common::nextID(), DB_common::getSequenceName(),
* DB_oci8::createSequence(), DB_oci8::dropSequence()
*/
function nextId($seq_name, $ondemand = true)
{
$seqname = $this->getSequenceName($seq_name);
$repeat = 0;
do {
$this->expectError(DB_ERROR_NOSUCHTABLE);
$result = $this->query("SELECT ${seqname}.nextval FROM dual");
$this->popExpect();
if ($ondemand && DB::isError($result) &&
$result->getCode() == DB_ERROR_NOSUCHTABLE) {
$repeat = 1;
$result = $this->createSequence($seq_name);
if (DB::isError($result)) {
return $this->raiseError($result);
}
} else {
$repeat = 0;
}
} while ($repeat);
if (DB::isError($result)) {
return $this->raiseError($result);
}
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
return $arr[0];
}
/**
* Creates a new sequence
*
* @param string $seq_name name of the new sequence
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::createSequence(), DB_common::getSequenceName(),
* DB_oci8::nextID(), DB_oci8::dropSequence()
*/
function createSequence($seq_name)
{
return $this->query('CREATE SEQUENCE '
. $this->getSequenceName($seq_name));
}
// }}}
// {{{ dropSequence()
/**
* Deletes a sequence
*
* @param string $seq_name name of the sequence to be deleted
*
* @return int DB_OK on success. A DB_Error object on failure.
*
* @see DB_common::dropSequence(), DB_common::getSequenceName(),
* DB_oci8::nextID(), DB_oci8::createSequence()
*/
function dropSequence($seq_name)
{
return $this->query('DROP SEQUENCE '
. $this->getSequenceName($seq_name));
}
// }}}
// {{{ oci8RaiseError()
/**
* Produces a DB_Error object regarding the current problem
*
* @param int $errno if the error is being manually raised pass a
* DB_ERROR* constant here. If this isn't passed
* the error information gathered from the DBMS.
*
* @return object the DB_Error object
*
* @see DB_common::raiseError(),
* DB_oci8::errorNative(), DB_oci8::errorCode()
*/
function oci8RaiseError($errno = null)
{
if ($errno === null) {
$error = @OCIError($this->connection);
return $this->raiseError($this->errorCode($error['code']),
null, null, null, $error['message']);
} elseif (is_resource($errno)) {
$error = @OCIError($errno);
return $this->raiseError($this->errorCode($error['code']),
null, null, null, $error['message']);
}
return $this->raiseError($this->errorCode($errno));
}
// }}}
// {{{ errorNative()
/**
* Gets the DBMS' native error code produced by the last query
*
* @return int the DBMS' error code. FALSE if the code could not be
* determined
*/
function errorNative()
{
if (is_resource($this->last_stmt)) {
$error = @OCIError($this->last_stmt);
} else {
$error = @OCIError($this->connection);
}
if (is_array($error)) {
return $error['code'];
}
return false;
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* NOTE: only supports 'table' and 'flags' if <var>$result</var>
* is a table name.
*
* NOTE: flags won't contain index information.
*
* @param object|string $result DB_result object from a query or a
* string containing the name of a table.
* While this also accepts a query result
* resource identifier, this behavior is
* deprecated.
* @param int $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A DB_Error object on failure.
*
* @see DB_common::tableInfo()
*/
function tableInfo($result, $mode = null)
{
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
$case_func = 'strtolower';
} else {
$case_func = 'strval';
}
$res = array();
if (is_string($result)) {
/*
* Probably received a table name.
* Create a result resource identifier.
*/
$result = strtoupper($result);
$q_fields = 'SELECT column_name, data_type, data_length, '
. 'nullable '
. 'FROM user_tab_columns '
. "WHERE table_name='$result' ORDER BY column_id";
$this->last_query = $q_fields;
if (!$stmt = @OCIParse($this->connection, $q_fields)) {
return $this->oci8RaiseError(DB_ERROR_NEED_MORE_DATA);
}
if (!@OCIExecute($stmt, OCI_DEFAULT)) {
return $this->oci8RaiseError($stmt);
}
$i = 0;
while (@OCIFetch($stmt)) {
$res[$i] = array(
'table' => $case_func($result),
'name' => $case_func(@OCIResult($stmt, 1)),
'type' => @OCIResult($stmt, 2),
'len' => @OCIResult($stmt, 3),
'flags' => (@OCIResult($stmt, 4) == 'N') ? 'not_null' : '',
);
if ($mode & DB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & DB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
$i++;
}
if ($mode) {
$res['num_fields'] = $i;
}
@OCIFreeStatement($stmt);
} else {
if (isset($result->result)) {
/*
* Probably received a result object.
* Extract the result resource identifier.
*/
$result = $result->result;
}
$res = array();
if ($result === $this->last_stmt) {
$count = @OCINumCols($result);
if ($mode) {
$res['num_fields'] = $count;
}
for ($i = 0; $i < $count; $i++) {
$res[$i] = array(
'table' => '',
'name' => $case_func(@OCIColumnName($result, $i+1)),
'type' => @OCIColumnType($result, $i+1),
'len' => @OCIColumnSize($result, $i+1),
'flags' => '',
);
if ($mode & DB_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & DB_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
} else {
return $this->raiseError(DB_ERROR_NOT_CAPABLE);
}
}
return $res;
}
// }}}
// {{{ getSpecialQuery()
/**
* Obtains the query string needed for listing a given type of objects
*
* @param string $type the kind of objects you want to retrieve
*
* @return string the SQL query string or null if the driver doesn't
* support the object type requested
*
* @access protected
* @see DB_common::getListOf()
*/
function getSpecialQuery($type)
{
switch ($type) {
case 'tables':
return 'SELECT table_name FROM user_tables';
case 'synonyms':
return 'SELECT synonym_name FROM user_synonyms';
case 'views':
return 'SELECT view_name FROM user_views';
default:
return null;
}
}
// }}}
// {{{ quoteFloat()
/**
* Formats a float value for use within a query in a locale-independent
* manner.
*
* @param float the float value to be quoted.
* @return string the quoted string.
* @see DB_common::quoteSmart()
* @since Method available since release 1.7.8.
*/
function quoteFloat($float) {
return $this->escapeSimple(str_replace(',', '.', strval(floatval($float))));
}
// }}}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
?>
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