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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Author: Lukas Smith <smith@pooteeweet.org> |
// +----------------------------------------------------------------------+
// $Id: oci8.php,v 1.72 2007/03/28 16:58:54 quipo Exp $
require_once 'MDB2/Driver/Datatype/Common.php';
/**
* MDB2 OCI8 driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Datatype_oci8 extends MDB2_Driver_Datatype_Common
{
// {{{ _baseConvertResult()
/**
* general type conversion method
*
* @param mixed $value refernce to a value to be converted
* @param string $type specifies which type to convert to
* @param boolean $rtrim [optional] when TRUE [default], apply rtrim() to text
* @return object a MDB2 error on failure
* @access protected
*/
function _baseConvertResult($value, $type, $rtrim = true)
{
if (is_null($value)) {
return null;
}
switch ($type) {
case 'date':
return substr($value, 0, strlen('YYYY-MM-DD'));
case 'time':
return substr($value, strlen('YYYY-MM-DD '), strlen('HH:MI:SS'));
}
return parent::_baseConvertResult($value, $type, $rtrim);
}
// }}}
// {{{ getTypeDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function getTypeDeclaration($field)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
switch ($field['type']) {
case 'text':
$length = !empty($field['length'])
? $field['length'] : $db->options['default_text_field_length'];
$fixed = !empty($field['fixed']) ? $field['fixed'] : false;
return $fixed ? 'CHAR('.$length.')' : 'VARCHAR2('.$length.')';
case 'clob':
return 'CLOB';
case 'blob':
return 'BLOB';
case 'integer':
if (!empty($field['length'])) {
switch((int)$field['length']) {
case 1: $digit = 3; break;
case 2: $digit = 5; break;
case 3: $digit = 8; break;
case 4: $digit = 10; break;
case 5: $digit = 13; break;
case 6: $digit = 15; break;
case 7: $digit = 17; break;
case 8: $digit = 20; break;
default: $digit = 10;
}
return 'NUMBER('.$digit.')';
}
return 'INT';
case 'boolean':
return 'NUMBER(1)';
case 'date':
case 'time':
case 'timestamp':
return 'DATE';
case 'float':
return 'NUMBER';
case 'decimal':
$scale = !empty($field['scale']) ? $field['scale'] : $db->options['decimal_places'];
return 'NUMBER(*,'.$scale.')';
}
}
// }}}
// {{{ _quoteCLOB()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @param bool $quote determines if the value should be quoted and escaped
* @param bool $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteCLOB($value, $quote, $escape_wildcards)
{
return 'EMPTY_CLOB()';
}
// }}}
// {{{ _quoteBLOB()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @param bool $quote determines if the value should be quoted and escaped
* @param bool $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteBLOB($value, $quote, $escape_wildcards)
{
return 'EMPTY_BLOB()';
}
// }}}
// {{{ _quoteDate()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @param bool $quote determines if the value should be quoted and escaped
* @param bool $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteDate($value, $quote, $escape_wildcards)
{
return $this->_quoteText("$value 00:00:00", $quote, $escape_wildcards);
}
// }}}
// {{{ _quoteTimestamp()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @param bool $quote determines if the value should be quoted and escaped
* @param bool $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteTimestamp($value, $quote, $escape_wildcards)
{
return $this->_quoteText($value, $quote, $escape_wildcards);
}
// }}}
// {{{ _quoteTime()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @param bool $quote determines if the value should be quoted and escaped
* @param bool $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteTime($value, $quote, $escape_wildcards)
{
return $this->_quoteText("0001-01-01 $value", $quote, $escape_wildcards);
}
// }}}
// {{{ writeLOBToFile()
/**
* retrieve LOB from the database
*
* @param array $lob array
* @param string $file name of the file into which the LOb should be fetched
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access protected
*/
function writeLOBToFile($lob, $file)
{
if (preg_match('/^(\w+:\/\/)(.*)$/', $file, $match)) {
if ($match[1] == 'file://') {
$file = $match[2];
}
}
$lob_data = stream_get_meta_data($lob);
$lob_index = $lob_data['wrapper_data']->lob_index;
$result = $this->lobs[$lob_index]['resource']->writetofile($file);
$this->lobs[$lob_index]['resource']->seek(0);
if (!$result) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(null, null, null,
'Unable to write LOB to file', __FUNCTION__);
}
return MDB2_OK;
}
// }}}
// {{{ _retrieveLOB()
/**
* retrieve LOB from the database
*
* @param array $lob array
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access protected
*/
function _retrieveLOB(&$lob)
{
if (!is_object($lob['resource'])) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'attemped to retrieve LOB from non existing or NULL column', __FUNCTION__);
}
if (!$lob['loaded']
# && !method_exists($lob['resource'], 'read')
) {
$lob['value'] = $lob['resource']->load();
$lob['resource']->seek(0);
}
$lob['loaded'] = true;
return MDB2_OK;
}
// }}}
// {{{ _readLOB()
/**
* Read data from large object input stream.
*
* @param array $lob array
* @param blob $data reference to a variable that will hold data to be
* read from the large object input stream
* @param int $length integer value that indicates the largest ammount of
* data to be read from the large object input stream.
* @return mixed length on success, a MDB2 error on failure
* @access protected
*/
function _readLOB($lob, $length)
{
if ($lob['loaded']) {
return parent::_readLOB($lob, $length);
}
if (!is_object($lob['resource'])) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'attemped to retrieve LOB from non existing or NULL column', __FUNCTION__);
}
$data = $lob['resource']->read($length);
if (!is_string($data)) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(null, null, null,
'Unable to read LOB', __FUNCTION__);
}
return $data;
}
// }}}
// {{{ patternEscapeString()
/**
* build string to define escape pattern string
*
* @access public
*
*
* @return string define escape pattern
*/
function patternEscapeString()
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return " ESCAPE '". $db->string_quoting['escape_pattern'] ."'";
}
// }}}
// {{{ _mapNativeDatatype()
/**
* Maps a native array description of a field to a MDB2 datatype and length
*
* @param array $field native field description
* @return array containing the various possible types, length, sign, fixed
* @access public
*/
function _mapNativeDatatype($field)
{
$db_type = strtolower($field['type']);
$type = array();
$length = $unsigned = $fixed = null;
if (!empty($field['length'])) {
$length = $field['length'];
}
switch ($db_type) {
case 'integer':
case 'pls_integer':
case 'binary_integer':
$type[] = 'integer';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
break;
case 'varchar':
case 'varchar2':
case 'nvarchar2':
$fixed = false;
case 'char':
case 'nchar':
$type[] = 'text';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'date':
case 'timestamp':
$type[] = 'timestamp';
$length = null;
break;
case 'float':
$type[] = 'float';
break;
case 'number':
if (!empty($field['scale'])) {
$type[] = 'decimal';
$length = $length.','.$field['scale'];
} else {
$type[] = 'integer';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
}
break;
case 'long':
$type[] = 'text';
case 'clob':
case 'nclob':
$type[] = 'clob';
break;
case 'blob':
case 'raw':
case 'long raw':
case 'bfile':
$type[] = 'blob';
$length = null;
break;
case 'rowid':
case 'urowid':
default:
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'unknown database attribute type: '.$db_type, __FUNCTION__);
}
if ((int)$length <= 0) {
$length = null;
}
return array($type, $length, $unsigned, $fixed);
}
}
?>