| Current File : //opt/RZphp72/includes/MDB2/Driver/Datatype/ibase.php |
<?php
// vim: set et ts=4 sw=4 fdm=marker:
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2007 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith, Lorenzo Alberton |
// | 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> |
// | Lorenzo Alberton <l.alberton@quipo.it> |
// +----------------------------------------------------------------------+
//
// $Id: ibase.php,v 1.89 2007/03/28 16:58:54 quipo Exp $
require_once 'MDB2/Driver/Datatype/Common.php';
/**
* MDB2 Firebird/Interbase driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
* @author Lorenzo Alberton <l.alberton@quipo.it>
*/
class MDB2_Driver_Datatype_ibase 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;
}
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
switch ($type) {
case 'timestamp':
return substr($value, 0, strlen('YYYY-MM-DD HH:MM:SS'));
}
return parent::_baseConvertResult($value, $type, $rtrim);
}
// }}}
// {{{ _getCharsetFieldDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to set the CHARACTER SET
* of a field declaration to be used in statements like CREATE TABLE.
*
* @param string $charset name of the charset
* @return string DBMS specific SQL code portion needed to set the CHARACTER SET
* of a field declaration.
*/
function _getCharsetFieldDeclaration($charset)
{
return 'CHARACTER SET '.$charset;
}
// }}}
// {{{ _getCollationFieldDeclaration()
/**
* Obtain DBMS specific SQL code portion needed to set the COLLATION
* of a field declaration to be used in statements like CREATE TABLE.
*
* @param string $collation name of the collation
* @return string DBMS specific SQL code portion needed to set the COLLATION
* of a field declaration.
*/
function _getCollationFieldDeclaration($collation)
{
return 'COLLATE '.$collation;
}
// }}}
// {{{ 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.')' : 'VARCHAR('.$length.')';
case 'clob':
return 'BLOB SUB_TYPE 1';
case 'blob':
return 'BLOB SUB_TYPE 0';
case 'integer':
return 'INT';
case 'boolean':
return 'SMALLINT';
case 'date':
return 'DATE';
case 'time':
return 'TIME';
case 'timestamp':
return 'TIMESTAMP';
case 'float':
return 'DOUBLE PRECISION';
case 'decimal':
$length = !empty($field['length']) ? $field['length'] : 18;
$scale = !empty($field['scale']) ? $field['scale'] : $db->options['decimal_places'];
return 'DECIMAL('.$length.','.$scale.')';
}
return '';
}
// }}}
// {{{ _quoteLOB()
/**
* 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 $escape_wildcards if to escape escape wildcards
* @return string text string that represents the given argument value in
* a DBMS specific format.
* @access protected
*/
function _quoteLOB($value, $quote, $escape_wildcards)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$connection = $db->getConnection();
if (PEAR::isError($connection)) {
return $connection;
}
$close = true;
if (is_resource($value)) {
$close = false;
} elseif (preg_match('/^(\w+:\/\/)(.*)$/', $value, $match)) {
if ($match[1] == 'file://') {
$value = $match[2];
}
$value = @fopen($value, 'r');
} else {
$fp = @tmpfile();
@fwrite($fp, $value);
@rewind($fp);
$value = $fp;
}
$blob_id = @ibase_blob_import($connection, $value);
if ($close) {
@fclose($value);
}
return $blob_id;
}
// }}}
// {{{ _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 (empty($lob['handle'])) {
$lob['handle'] = @ibase_blob_open($lob['resource']);
if (!$lob['handle']) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(null, null, null,
'Could not open fetched large object field', __FUNCTION__);
}
}
$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)
{
$data = @ibase_blob_get($lob['handle'], $length);
if (!is_string($data)) {
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(null, null, null,
'Unable to read LOB', __FUNCTION__);
}
return $data;
}
// }}}
// {{{ _destroyLOB()
/**
* Free any resources allocated during the lifetime of the large object
* handler object.
*
* @param array $lob array
* @access protected
*/
function _destroyLOB(&$lob)
{
if (isset($lob['handle'])) {
@ibase_blob_close($lob['handle']);
unset($lob['handle']);
}
}
// }}}
// {{{ 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)
{
$length = $field['length'];
if ((int)$length <= 0) {
$length = null;
}
$type = array();
$unsigned = $fixed = null;
$db_type = strtolower($field['type']);
$field['field_sub_type'] = !empty($field['field_sub_type'])
? strtolower($field['field_sub_type']) : null;
switch ($db_type) {
case 'smallint':
case 'integer':
case 'int64':
//these may be 'numeric' or 'decimal'
if (isset($field['field_sub_type'])) {
$field['type'] = $field['field_sub_type'];
return $this->mapNativeDatatype($field);
}
case 'bigint':
case 'quad':
$type[] = 'integer';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
break;
case 'varchar':
$fixed = false;
case 'char':
case 'cstring':
$type[] = 'text';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'date':
$type[] = 'date';
$length = null;
break;
case 'timestamp':
$type[] = 'timestamp';
$length = null;
break;
case 'time':
$type[] = 'time';
$length = null;
break;
case 'float':
case 'double':
case 'double precision':
case 'd_float':
$type[] = 'float';
break;
case 'decimal':
case 'numeric':
$type[] = 'decimal';
$length = $field['precision'].','.$field['scale'];
break;
case 'blob':
$type[] = ($field['field_sub_type'] == 'text') ? 'clob' : 'blob';
$length = null;
break;
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);
}
// }}}
}
?>