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oci8.php
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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 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> |
// +----------------------------------------------------------------------+
// $Id$
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
{
// {{{ convertResult()
/**
* convert a value to a RDBMS indepdenant MDB2 type
*
* @param mixed $value value to be converted
* @param int $type constant that specifies which type to convert to
* @return mixed converted value
* @access public
*/
function convertResult($value, $type)
{
if (is_null($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'));
default:
return $this->_baseConvertResult($value, $type);
}
}
// }}}
// {{{ 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 = (array_key_exists('length', $field) ? $field['length'] : (($length = $db->options['default_text_field_length']) ? $length : 4000));
return 'VARCHAR ('.$length.')';
case 'clob':
return 'CLOB';
case 'blob':
return 'BLOB';
case 'integer':
return 'INT';
case 'boolean':
return 'CHAR (1)';
case 'date':
case 'time':
case 'timestamp':
return 'DATE';
case 'float':
return 'NUMBER';
case 'decimal':
return 'NUMBER(*,'.$db->options['decimal_places'].')';
}
}
// }}}
// {{{ _getIntegerDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an integer type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @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:
*
* unsigned
* Boolean flag that indicates whether the field should be
* declared as unsigned integer if possible.
*
* default
* Integer 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.
* @param string $table name of the current table being processed
* by alterTable(), used for autoincrement emulation
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getIntegerDeclaration($name, $field, $table = null)
{
if (array_key_exists('unsigned', $field) && $field['unsigned']) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$db->warning[] = "unsigned integer field \"$name\" is being declared as signed integer";
}
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'integer') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
}
// }}}
// {{{ _getTextDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getTextDeclaration($name, $field)
{
$type = $this->getTypeDeclaration($field);
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'text') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$type.$default.$notnull;
}
// }}}
// {{{ _getCLOBDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an character
* large object type field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the large
* object field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access public
*/
function _getCLOBDeclaration($name, $field)
{
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$notnull;
}
// }}}
// {{{ _getBLOBDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare an binary large
* object type field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the large
* object field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getBLOBDeclaration($name, $field)
{
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$notnull;
}
// }}}
// {{{ _getDateDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a date type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Date value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getDateDeclaration($name, $field)
{
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'date') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
}
// }}}
// {{{ _getTimestampDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a timestamp
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Timestamp value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getTimestampDeclaration($name, $field)
{
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'timestamp') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull; }
// }}}
// {{{ _getTimeDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a time
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Time value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getTimeDeclaration($name, $field)
{
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'time') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
}
// }}}
// {{{ _getFloatDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a float type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Float value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getFloatDeclaration($name, $field)
{
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'float') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
}
// }}}
// {{{ _getDecimalDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to declare a decimal type
* field to be used in statements like CREATE TABLE.
*
* @param string $name name the field to be declared.
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* default
* Decimal value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @access protected
*/
function _getDecimalDeclaration($name, $field)
{
$default = array_key_exists('default', $field) ? ' DEFAULT '.
$this->quote($field['default'], 'decimal') : '';
$notnull = (array_key_exists('notnull', $field) && $field['notnull']) ? ' NOT NULL' : '';
return $name.' '.$this->getTypeDeclaration($field).$default.$notnull;
}
// }}}
// {{{ _quoteCLOB()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param $value
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteCLOB($value)
{
return 'EMPTY_CLOB()';
}
// }}}
// {{{ _quoteBLOB()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param $value
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteBLOB($value)
{
return 'EMPTY_BLOB()';
}
// }}}
// {{{ _quoteDate()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteDate($value)
{
return $this->_quoteText("$value 00:00:00");
}
// }}}
// {{{ _quoteTimestamp()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteTimestamp($value)
{
return $this->_quoteText($value);
}
// }}}
// {{{ _quoteTime()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteTime($value)
{
return $this->_quoteText("0001-01-01 $value");
}
// }}}
// {{{ _quoteFloat()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteFloat($value)
{
return (float)$value;
}
// }}}
// {{{ _quoteDecimal()
/**
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
*
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteDecimal($value)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->escape($value);
}
// }}}
// {{{ writeLOBToFile()
/**
* retrieve LOB from the database
*
* @param resource $lob stream handle
* @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)
{
$lob_data = stream_get_meta_data($lob);
$lob_index = $lob_data['wrapper_data']->lob_index;
if (!@$this->lobs[$lob_index]['value']->writelobtofile($file)) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError();
}
return MDB2_OK;
}
// }}}
// {{{ _retrieveLOB()
/**
* retrieve LOB from the database
*
* @param int $lob_index from the lob array
* @return mixed MDB2_OK on success, a MDB2 error on failure
* @access protected
*/
function _retrieveLOB(&$lob)
{
if (!array_key_exists('loaded', $lob)) {
if (!is_object($lob['ressource'])) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR, null, null,
'attemped to retrieve LOB from non existing or NULL column');
}
$lob['value'] = $lob['ressource']->load();
$lob['loaded'] = true;
}
return MDB2_OK;
}
}
?>

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