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Common.php
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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: Common.php 273526 2009-01-14 15:01:21Z quipo $
//
/**
* @package MDB2
* @category Database
*/
/**
* These are constants for the tableInfo-function
* they are bitwised or'ed. so if there are more constants to be defined
* in the future, adjust MDB2_TABLEINFO_FULL accordingly
*/
define('MDB2_TABLEINFO_ORDER', 1);
define('MDB2_TABLEINFO_ORDERTABLE', 2);
define('MDB2_TABLEINFO_FULL', 3);
/**
* Base class for the schema reverse engineering module that is extended by each MDB2 driver
*
* To load this module in the MDB2 object:
* $mdb->loadModule('Reverse');
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Reverse_Common extends MDB2_Module_Common
{
// {{{ splitTableSchema()
/**
* Split the "[owner|schema].table" notation into an array
*
* @param string $table [schema and] table name
*
* @return array array(schema, table)
* @access private
*/
function splitTableSchema($table)
{
$ret = array();
if (strpos($table, '.') !== false) {
return explode('.', $table);
}
return array(null, $table);
}
// }}}
// {{{ getTableFieldDefinition()
/**
* Get the structure of a field into an array
*
* @param string $table name of table that should be used in method
* @param string $field name of field that should be used in method
* @return mixed data array on success, a MDB2 error on failure.
* The returned array contains an array for each field definition,
* with all or some of these indices, depending on the field data type:
* [notnull] [nativetype] [length] [fixed] [default] [type] [mdb2type]
* @access public
*/
function getTableFieldDefinition($table, $field)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ getTableIndexDefinition()
/**
* Get the structure of an index into an array
*
* @param string $table name of table that should be used in method
* @param string $index name of index that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* The returned array has this structure:
* </pre>
* array (
* [fields] => array (
* [field1name] => array() // one entry per each field covered
* [field2name] => array() // by the index
* [field3name] => array(
* [sorting] => ascending
* )
* )
* );
* </pre>
* @access public
*/
function getTableIndexDefinition($table, $index)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ getTableConstraintDefinition()
/**
* Get the structure of an constraints into an array
*
* @param string $table name of table that should be used in method
* @param string $index name of index that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* The returned array has this structure:
* <pre>
* array (
* [primary] => 0
* [unique] => 0
* [foreign] => 1
* [check] => 0
* [fields] => array (
* [field1name] => array() // one entry per each field covered
* [field2name] => array() // by the index
* [field3name] => array(
* [sorting] => ascending
* [position] => 3
* )
* )
* [references] => array(
* [table] => name
* [fields] => array(
* [field1name] => array( //one entry per each referenced field
* [position] => 1
* )
* )
* )
* [deferrable] => 0
* [initiallydeferred] => 0
* [onupdate] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
* [ondelete] => CASCADE|RESTRICT|SET NULL|SET DEFAULT|NO ACTION
* [match] => SIMPLE|PARTIAL|FULL
* );
* </pre>
* @access public
*/
function getTableConstraintDefinition($table, $index)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ getSequenceDefinition()
/**
* Get the structure of a sequence into an array
*
* @param string $sequence name of sequence that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* The returned array has this structure:
* <pre>
* array (
* [start] => n
* );
* </pre>
* @access public
*/
function getSequenceDefinition($sequence)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$start = $db->currId($sequence);
if (PEAR::isError($start)) {
return $start;
}
if ($db->supports('current_id')) {
$start++;
} else {
$db->warnings[] = 'database does not support getting current
sequence value, the sequence value was incremented';
}
$definition = array();
if ($start != 1) {
$definition = array('start' => $start);
}
return $definition;
}
// }}}
// {{{ getTriggerDefinition()
/**
* Get the structure of a trigger into an array
*
* EXPERIMENTAL
*
* WARNING: this function is experimental and may change the returned value
* at any time until labelled as non-experimental
*
* @param string $trigger name of trigger that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* The returned array has this structure:
* <pre>
* array (
* [trigger_name] => 'trigger name',
* [table_name] => 'table name',
* [trigger_body] => 'trigger body definition',
* [trigger_type] => 'BEFORE' | 'AFTER',
* [trigger_event] => 'INSERT' | 'UPDATE' | 'DELETE'
* //or comma separated list of multiple events, when supported
* [trigger_enabled] => true|false
* [trigger_comment] => 'trigger comment',
* );
* </pre>
* The oci8 driver also returns a [when_clause] index.
* @access public
*/
function getTriggerDefinition($trigger)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* The format of the resulting array depends on which <var>$mode</var>
* you select. The sample output below is based on this query:
* <pre>
* SELECT tblFoo.fldID, tblFoo.fldPhone, tblBar.fldId
* FROM tblFoo
* JOIN tblBar ON tblFoo.fldId = tblBar.fldId
* </pre>
*
* <ul>
* <li>
*
* <kbd>null</kbd> (default)
* <pre>
* [0] => Array (
* [table] => tblFoo
* [name] => fldId
* [type] => int
* [len] => 11
* [flags] => primary_key not_null
* )
* [1] => Array (
* [table] => tblFoo
* [name] => fldPhone
* [type] => string
* [len] => 20
* [flags] =>
* )
* [2] => Array (
* [table] => tblBar
* [name] => fldId
* [type] => int
* [len] => 11
* [flags] => primary_key not_null
* )
* </pre>
*
* </li><li>
*
* <kbd>MDB2_TABLEINFO_ORDER</kbd>
*
* <p>In addition to the information found in the default output,
* a notation of the number of columns is provided by the
* <samp>num_fields</samp> element while the <samp>order</samp>
* element provides an array with the column names as the keys and
* their location index number (corresponding to the keys in the
* the default output) as the values.</p>
*
* <p>If a result set has identical field names, the last one is
* used.</p>
*
* <pre>
* [num_fields] => 3
* [order] => Array (
* [fldId] => 2
* [fldTrans] => 1
* )
* </pre>
*
* </li><li>
*
* <kbd>MDB2_TABLEINFO_ORDERTABLE</kbd>
*
* <p>Similar to <kbd>MDB2_TABLEINFO_ORDER</kbd> but adds more
* dimensions to the array in which the table names are keys and
* the field names are sub-keys. This is helpful for queries that
* join tables which have identical field names.</p>
*
* <pre>
* [num_fields] => 3
* [ordertable] => Array (
* [tblFoo] => Array (
* [fldId] => 0
* [fldPhone] => 1
* )
* [tblBar] => Array (
* [fldId] => 2
* )
* )
* </pre>
*
* </li>
* </ul>
*
* The <samp>flags</samp> element contains a space separated list
* of extra information about the field. This data is inconsistent
* between DBMS's due to the way each DBMS works.
* + <samp>primary_key</samp>
* + <samp>unique_key</samp>
* + <samp>multiple_key</samp>
* + <samp>not_null</samp>
*
* Most DBMS's only provide the <samp>table</samp> and <samp>flags</samp>
* elements if <var>$result</var> is a table name. The following DBMS's
* provide full information from queries:
* + fbsql
* + mysql
*
* If the 'portability' option has <samp>MDB2_PORTABILITY_FIX_CASE</samp>
* turned on, the names of tables and fields will be lower or upper cased.
*
* @param object|string $result MDB2_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 $mode either unused or one of the tableInfo modes:
* <kbd>MDB2_TABLEINFO_ORDERTABLE</kbd>,
* <kbd>MDB2_TABLEINFO_ORDER</kbd> or
* <kbd>MDB2_TABLEINFO_FULL</kbd> (which does both).
* These are bitwise, so the first two can be
* combined using <kbd>|</kbd>.
*
* @return array an associative array with the information requested.
* A MDB2_Error object on failure.
*
* @see MDB2_Driver_Common::setOption()
*/
function tableInfo($result, $mode = null)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
if (!is_string($result)) {
return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
}
$db->loadModule('Manager', null, true);
$fields = $db->manager->listTableFields($result);
if (PEAR::isError($fields)) {
return $fields;
}
$flags = array();
$idxname_format = $db->getOption('idxname_format');
$db->setOption('idxname_format', '%s');
$indexes = $db->manager->listTableIndexes($result);
if (PEAR::isError($indexes)) {
$db->setOption('idxname_format', $idxname_format);
return $indexes;
}
foreach ($indexes as $index) {
$definition = $this->getTableIndexDefinition($result, $index);
if (PEAR::isError($definition)) {
$db->setOption('idxname_format', $idxname_format);
return $definition;
}
if (count($definition['fields']) > 1) {
foreach ($definition['fields'] as $field => $sort) {
$flags[$field] = 'multiple_key';
}
}
}
$constraints = $db->manager->listTableConstraints($result);
if (PEAR::isError($constraints)) {
return $constraints;
}
foreach ($constraints as $constraint) {
$definition = $this->getTableConstraintDefinition($result, $constraint);
if (PEAR::isError($definition)) {
$db->setOption('idxname_format', $idxname_format);
return $definition;
}
$flag = !empty($definition['primary'])
? 'primary_key' : (!empty($definition['unique'])
? 'unique_key' : false);
if ($flag) {
foreach ($definition['fields'] as $field => $sort) {
if (empty($flags[$field]) || $flags[$field] != 'primary_key') {
$flags[$field] = $flag;
}
}
}
}
$res = array();
if ($mode) {
$res['num_fields'] = count($fields);
}
foreach ($fields as $i => $field) {
$definition = $this->getTableFieldDefinition($result, $field);
if (PEAR::isError($definition)) {
$db->setOption('idxname_format', $idxname_format);
return $definition;
}
$res[$i] = $definition[0];
$res[$i]['name'] = $field;
$res[$i]['table'] = $result;
$res[$i]['type'] = preg_replace('/^([a-z]+).*$/i', '\\1', trim($definition[0]['nativetype']));
// 'primary_key', 'unique_key', 'multiple_key'
$res[$i]['flags'] = empty($flags[$field]) ? '' : $flags[$field];
// not_null', 'unsigned', 'auto_increment', 'default_[rawencodedvalue]'
if (!empty($res[$i]['notnull'])) {
$res[$i]['flags'].= ' not_null';
}
if (!empty($res[$i]['unsigned'])) {
$res[$i]['flags'].= ' unsigned';
}
if (!empty($res[$i]['auto_increment'])) {
$res[$i]['flags'].= ' autoincrement';
}
if (!empty($res[$i]['default'])) {
$res[$i]['flags'].= ' default_'.rawurlencode($res[$i]['default']);
}
if ($mode & MDB2_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
$db->setOption('idxname_format', $idxname_format);
return $res;
}
}
?>

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