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<?php
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB 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: Frank M. Kromann <frank@kromann.info |
// +----------------------------------------------------------------------+
//
// $Id: mssql.php,v 1.4.4.8 2004/04/10 08:02:31 lsmith Exp $
//
if(!defined('MDB_MANAGER_MSSQL_INCLUDED'))
{
define('MDB_MANAGER_MSSQL_INCLUDED',1);
require_once('MDB/Modules/Manager/Common.php');
/**
* MDB MSSQL driver for the management modules
*
* @package MDB
* @category Database
* @author Frank M. Kromann <frank@kromann.info
*/
class MDB_Manager_mssql extends MDB_Manager_Common
{
// }}}
// {{{ createDatabase()
/**
* create a new database
*
* @param object $dbs database object that is extended by this class
* @param string $name name of the database that should be created
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
*/
function createDatabase(&$db, $name)
{
$DatabaseDevice = isset($db->options["DatabaseDevice"]) ? $db->options["DatabaseDevice"] : "DEFAULT";
$DatabaseSize = isset($db->options["DatabaseSize"]) ? ", SIZE=".$db->options["DatabaseSize"] : "";
return($db->standaloneQuery("CREATE DATABASE $name ON ".$DatabaseDevice.$DatabaseSize));
}
// }}}
// {{{ dropDatabase()
/**
* drop an existing database
*
* @param object $dbs database object that is extended by this class
* @param string $name name of the database that should be dropped
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
*/
function dropDatabase(&$db, $name)
{
return($db->standaloneQuery("DROP DATABASE $name"));
}
// }}}
// {{{ alterTable()
/**
* alter an existing table
*
* @param object $dbs database object that is extended by this class
* @param string $name name of the table that is intended to be changed.
* @param array $changes associative array that contains the details of each type
* of change that is intended to be performed. The types of
* changes that are currently supported are defined as follows:
*
* name
*
* New name for the table.
*
* AddedFields
*
* Associative array with the names of fields to be added as
* indexes of the array. The value of each entry of the array
* should be set to another associative array with the properties
* of the fields to be added. The properties of the fields should
* be the same as defined by the Metabase parser.
*
* Additionally, there should be an entry named Declaration that
* is expected to contain the portion of the field declaration already
* in DBMS specific SQL code as it is used in the CREATE TABLE statement.
*
* RemovedFields
*
* Associative array with the names of fields to be removed as indexes
* of the array. Currently the values assigned to each entry are ignored.
* An empty array should be used for future compatibility.
*
* RenamedFields
*
* Associative array with the names of fields to be renamed as indexes
* of the array. The value of each entry of the array should be set to
* another associative array with the entry named name with the new
* field name and the entry named Declaration that is expected to contain
* the portion of the field declaration already in DBMS specific SQL code
* as it is used in the CREATE TABLE statement.
*
* ChangedFields
*
* Associative array with the names of the fields to be changed as indexes
* of the array. Keep in mind that if it is intended to change either the
* name of a field and any other properties, the ChangedFields array entries
* should have the new names of the fields as array indexes.
*
* The value of each entry of the array should be set to another associative
* array with the properties of the fields to that are meant to be changed as
* array entries. These entries should be assigned to the new values of the
* respective properties. The properties of the fields should be the same
* as defined by the Metabase parser.
*
* If the default property is meant to be added, removed or changed, there
* should also be an entry with index ChangedDefault assigned to 1. Similarly,
* if the notnull constraint is to be added or removed, there should also be
* an entry with index ChangedNotNull assigned to 1.
*
* Additionally, there should be an entry named Declaration that is expected
* to contain the portion of the field changed declaration already in DBMS
* specific SQL code as it is used in the CREATE TABLE statement.
* Example
* array(
* 'name' => 'userlist',
* 'AddedFields' => array(
* 'quota' => array(
* 'type' => 'integer',
* 'unsigned' => 1
* 'Declaration' => 'quota INT'
* )
* ),
* 'RemovedFields' => array(
* 'file_limit' => array(),
* 'time_limit' => array()
* ),
* 'ChangedFields' => array(
* 'gender' => array(
* 'default' => 'M',
* 'ChangeDefault' => 1,
* 'Declaration' => "gender CHAR(1) DEFAULT 'M'"
* )
* ),
* 'RenamedFields' => array(
* 'sex' => array(
* 'name' => 'gender',
* 'Declaration' => "gender CHAR(1) DEFAULT 'M'"
* )
* )
* )
*
* @param boolean $check indicates whether the function should just check if the DBMS driver
* can perform the requested table alterations if the value is true or
* actually perform them otherwise.
* @access public
*
* @return mixed MDB_OK on success, a MDB error on failure
*/
function alterTable(&$db, $name, $changes, $check)
{
if ($check) {
for ($change = 0, reset($changes);
$change < count($changes);
next($changes), $change++
) {
switch (key($changes)) {
case "AddedFields":
break;
case "RemovedFields":
case "name":
case "RenamedFields":
case "ChangedFields":
default:
return($db->raiseError(MDB_ERROR_CANNOT_ALTER, NULL, NULL,
'Alter table: change type "'.key($changes).'" not yet supported'));
}
}
return(MDB_OK);
} else {
if (isset($changes[$change = 'RemovedFields'])
|| isset($changes[$change = 'name'])
|| isset($changes[$change = 'RenamedFields'])
|| isset($changes[$change = 'ChangedFields'])
) {
return($db->raiseError(MDB_ERROR_CANNOT_ALTER, NULL, NULL,
'Alter table: change type "'.$change.'" is not supported by the server"'));
}
$query='';
if (isset($changes['AddedFields'])) {
if(strcmp($query, '')) {
$query.= ', ';
}
$query.= 'ADD ';
$fields = $changes['AddedFields'];
for ($field = 0, reset($fields);
$field < count($fields);
next($fields), $field++)
{
if (strcmp($query, '')) {
$query.= ', ';
}
$query.= $fields[key($fields)]['Declaration'];
}
}
return(strcmp($query, '') ? $db->query("ALTER TABLE $name $query") : MDB_OK);
}
}
// }}}
// {{{ listTables()
/**
* list all tables in the current database
*
* @param object $db database object that is extended by this class
* @return mixed data array on success, a MDB error on failure
* @access public
**/
function listTables(&$db)
{
$query = 'EXECUTE sp_tables @table_type = "\'TABLE\'"';
$table_names = $db->queryCol($query, null, 2);
if (MDB::isError($table_names)) {
return($table_names);
}
$tables = array();
for ($i = 0, $j = count($table_names); $i <$j; ++$i) {
if (!$this->_isSequenceName($db, $table_names[$i])) {
$tables[] = $table_names[$i];
}
}
return($tables);
}
// }}}
// {{{ listTableFields()
/**
* list all fields in a tables in the current database
*
* @param object $db database object that is extended by this class
* @param string $table name of table that should be used in method
* @return mixed data array on success, a MDB error on failure
* @access public
*/
function listTableFields(&$db, $table)
{
$result = $db->query("SELECT * FROM $table");
if( MDB::isError($result)) {
return($result);
}
$columns = $db->getColumnNames($result);
if (MDB::isError($columns)) {
$db->freeResult($columns);
return $columns;
}
return(array_flip($columns));
}
// }}}
// {{{ getTableFieldDefinition()
/**
* get the stucture of a field into an array; this method is still alpha quality!
*
* @param object $db database object that is extended by this class
* @param string $table name of table that should be used in method
* @param string $field_name name of field that should be used in method
* @return mixed data array on success, a MDB error on failure
* @access public
*/
function getTableFieldDefinition(&$db, $table, $field_name)
{
$columns = $db->queryRow("EXEC sp_columns @table_name='$table',
@column_name='$field_name'", NULL, MDB_FETCHMODE_ASSOC );
if (MDB::isError($columns)) {
return($columns);
}
if ($db->options['optimize'] != 'portability') {
array_change_key_case($columns);
}
if (!isset($columns[$column = 'column_name'])
|| !isset($columns[$column = 'type_name'])
) {
return($db->raiseError(MDB_ERROR_MANAGER, NULL, NULL,
'Get table field definition: no result, please check table '.
$table.' and field '.$field_name.' are correct'));
}
$field_column = $columns['column_name'];
$type_column = $columns['type_name'];
$db_type = strtolower($type_column);
if (strpos($type_column, ' ') !== FALSE) {
$db_type = strtok($db_type, ' ');
}
$length = $columns['precision'];
$decimal = $columns['scale'];
$type = array();
switch ($db_type) {
case 'bigint':
case 'int':
case 'smallint':
case 'tinyint':
$type[0] = 'integer';
if ($length == '1') {
$type[1] = 'boolean';
}
break;
case 'bit':
$type[0] = 'integer';
$type[1] = 'boolean';
break;
case 'decimal':
case 'numeric':
$type[0] = 'decimal';
break;
case 'money':
case 'smallmoney':
$type[0] = 'decimal';
$type[1] = 'float';
break;
case 'float':
case 'real':
$type[0] = 'float';
break;
case 'datetime':
case 'smalldatetime':
$type[0] = 'timestamp';
break;
case 'char':
case 'varchar':
case 'nchar':
case 'nvarchar':
$type[0] = 'text';
if ($length == '1') {
$type[1] = 'boolean';
}
break;
case 'text':
case 'ntext':
$type[0] = 'clob';
$type[1] = 'text';
break;
case 'binary':
case 'varbinary':
case 'image':
$type[0] = 'blob';
break;
case 'timestamp':
$type[0] = 'blob';
break;
default:
return($db->raiseError(MDB_ERROR_MANAGER, NULL, NULL,
'List table fields: unknown database attribute type'));
}
unset($notnull);
if ($columns['nullable'] == 0) {
$notnull = 1;
}
unset($default);
if (isset($columns['column_def']) && ($columns['column_def'] != NULL)) {
if (($type[0] = 'integer') OR ($type[0] = 'boolean')) {
$columns['column_def'] = str_replace( '(', '', $columns['column_def'] );
$columns['column_def'] = str_replace( ')', '', $columns['column_def'] );
}
$default = $columns['column_def'];
}
$definition = array();
for ($field_choices = array(), $datatype = 0; $datatype < count($type); $datatype++) {
$field_choices[$datatype] = array('type' => $type[$datatype]);
if (isset($notnull)) {
$field_choices[$datatype]['notnull'] = 1;
}
if (isset($default)) {
$field_choices[$datatype]['default'] = $default;
}
if ($type[$datatype] != 'boolean'
&& $type[$datatype] != 'time'
&& $type[$datatype] != 'date'
&& $type[$datatype] != 'timestamp'
) {
if (strlen($length)) {
$field_choices[$datatype]['length'] = $length;
}
}
}
$definition[0] = $field_choices;
if (strpos($type_column, 'identity') !== FALSE) {
$implicit_sequence = array();
$implicit_sequence['on'] = array();
$implicit_sequence['on']['table'] = $table;
$implicit_sequence['on']['field'] = $field_name;
$definition[1]['name'] = $table.'_'.$field_name;
$definition[1]['definition'] = $implicit_sequence;
}
if (MDB::isError($indexes = $db->queryAll("EXEC sp_pkeys @table_name='$table'"
, NULL, MDB_FETCHMODE_ASSOC)))
{
return $indexes;
}
if ($indexes != NULL) {
$is_primary = FALSE;
foreach ($indexes as $index) {
if ($index['column_name'] == $field_name) {
$is_primary = TRUE;
break;
}
}
if ($is_primary) {
$implicit_index = array();
$implicit_index['unique'] = 1;
$implicit_index['FIELDS'][$field_name] = '';
$definition[2]['name'] = $field_name;
$definition[2]['definition'] = $implicit_index;
}
}
return($definition);
}
// }}}
// {{{ createSequence()
/**
* create sequence
*
* @param object $dbs database object that is extended by this class
* @param string $seq_name name of the sequence to be created
* @param string $start start value of the sequence; default is 1
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
*/
function createSequence(&$db, $seq_name, $start)
{
$sequence_name = $db->getSequenceName($seq_name);
$query = "CREATE TABLE $sequence_name (".$db->options['sequence_col_name']." INT NOT NULL IDENTITY($start,1) PRIMARY KEY CLUSTERED)";
return($db->query($query));
}
// }}}
// {{{ dropSequence()
/**
* drop existing sequence
*
* @param object $dbs database object that is extended by this class
* @param string $seq_name name of the sequence to be dropped
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
*/
function dropSequence(&$db, $seq_name)
{
$sequence_name = $db->getSequenceName($seq_name);
return($db->Query("DROP TABLE $sequence_name"));
}
}
};
?>
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