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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: Paul Cooper <pgc@ucecom.com> |
// +----------------------------------------------------------------------+
//
// $Id: pgsql.php,v 1.39.4.3 2004/03/09 15:43:40 lsmith Exp $
if(!defined('MDB_MANAGER_PGSQL_INCLUDED'))
{
define('MDB_MANAGER_PGSQL_INCLUDED', 1);
require_once('MDB/Modules/Manager/Common.php');
/**
* MDB MySQL driver for the management modules
*
* @package MDB
* @category Database
* @access private
* @author Paul Cooper <pgc@ucecom.com>
*/
class MDB_Manager_pgsql extends MDB_Manager_common
{
// {{{ createDatabase()
/**
* create a new database
*
* @param object $db 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, $name)
{
return($db->_standaloneQuery("CREATE DATABASE $name"));
}
// }}}
// {{{ dropDatabase()
/**
* drop an existing database
*
* @param object $db 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"));
}
// }}}
// {{{ createTable()
/**
* create a new table
*
* @param object $db database object that is extended by this class
* @param string $name Name of the database that should be created
* @param array $fields Associative array that contains the definition of each field of the new table
* The indexes of the array entries are the names of the fields of the table an
* the array entry values are associative arrays like those that are meant to be
* passed with the field definitions to get[Type]Declaration() functions.
*
* Example
* array(
*
* 'id' => array(
* 'type' => 'integer',
* 'unsigned' => 1
* 'notnull' => 1
* 'default' => 0
* ),
* 'name' => array(
* 'type' => 'text',
* 'length' => 12
* ),
* 'password' => array(
* 'type' => 'text',
* 'length' => 12
* )
* );
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
**/
function createTable(&$db, $name, $fields)
{
if (!isset($name) || !strcmp($name, '')) {
return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL, 'no valid table name specified'));
}
if (count($fields) == 0) {
return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL, 'no fields specified for table "'.$name.'"'));
}
$query_fields = '';
if (MDB::isError($query_fields = $db->getFieldDeclarationList($fields))) {
return($db->raiseError(MDB_ERROR_CANNOT_CREATE, NULL, NULL, 'unkown error'));
}
return($db->query("CREATE TABLE $name ($query_fields)"));
}
// }}}
// {{{ alterTable()
/**
* alter an existing table
*
* @param object $db 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 $check indicates whether the function should just check if the DBMS driver
* can perform the requested table alterations if the value is TRUE or
* actually perform them otherwise.
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
**/
function alterTable(&$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':
return($db->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL, 'database server does not support dropping table columns'));
case 'name':
case 'RenamedFields':
case 'ChangedFields':
default:
return($db->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL, 'change type "'.key($changes).'\" not yet supported'));
}
}
return(MDB_OK);
} else {
if (isSet($changes[$change = 'name']) || isSet($changes[$change = 'RenamedFields']) || isSet($changes[$change = 'ChangedFields'])) {
return($db->raiseError(MDB_ERROR_UNSUPPORTED, NULL, NULL, 'change type "'.$change.'" not yet supported'));
}
$query = '';
if (isSet($changes['AddedFields'])) {
$fields = $changes['AddedFields'];
for ($field = 0, reset($fields); $field < count($fields); next($fields), $field++) {
if (MDB::isError($result = $db->query("ALTER TABLE $name ADD ".$fields[key($fields)]['Declaration']))) {
return($result);
}
}
}
if (isSet($changes['RemovedFields'])) {
$fields = $changes['RemovedFields'];
for ($field = 0, reset($fields); $field < count($fields); next($fields), $field++) {
if (MDB::isError($result = $db->query("ALTER TABLE $name DROP ".key($fields)))) {
return($result);
}
}
}
return(MDB_OK);
}
}
// }}}
// {{{ listDatabases()
/**
* list all databases
*
* @param object $db database object that is extended by this class
* @return mixed data array on success, a MDB error on failure
* @access public
**/
function listDatabases(&$db)
{
return($db->queryCol('SELECT datname FROM pg_database'));
}
// }}}
// {{{ listUsers()
/**
* list all users
*
* @param object $db database object that is extended by this class
* @return mixed data array on success, a MDB error on failure
* @access public
**/
function listUsers(&$db)
{
return($db->queryCol('SELECT usename FROM pg_user'));
}
// }}}
// {{{ 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)
{
// gratuitously stolen from PEAR DB _getSpecialQuery in pgsql.php
$sql = 'SELECT c.relname as "Name"
FROM pg_class c, pg_user u
WHERE c.relowner = u.usesysid AND c.relkind = \'r\'
AND not exists (select 1 from pg_views where viewname = c.relname)
AND c.relname !~ \'^pg_\'
AND c.relname !~ \'^pga_\'
UNION
SELECT c.relname as "Name"
FROM pg_class c
WHERE c.relkind = \'r\'
AND not exists (select 1 from pg_views where viewname = c.relname)
AND not exists (select 1 from pg_user where usesysid = c.relowner)
AND c.relname !~ \'^pg_\'
AND c.relname !~ \'^pga_\'';
return($db->queryCol($sql));
}
// }}}
// {{{ 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(array_flip($columns));
}
// }}}
// {{{ getTableFieldDefinition()
/**
* get the stucture of a field into an array
*
* @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)
{
$result = $db->query("SELECT
attnum,attname,typname,attlen,attnotnull,
atttypmod,usename,usesysid,pg_class.oid,relpages,
reltuples,relhaspkey,relhasrules,relacl,adsrc
FROM pg_class,pg_user,pg_type,
pg_attribute left outer join pg_attrdef on
pg_attribute.attrelid=pg_attrdef.adrelid
WHERE (pg_class.relname='$table')
and (pg_class.oid=pg_attribute.attrelid)
and (pg_class.relowner=pg_user.usesysid)
and (pg_attribute.atttypid=pg_type.oid)
and attnum > 0
and attname = '$field_name'
ORDER BY attnum
");
if(MDB::isError($result)) {
return($result);
}
$columns = $db->fetchInto($result, MDB_FETCHMODE_ASSOC);
$field_column = $columns['attname'];
$type_column = $columns['typname'];
$db_type = preg_replace('/\d/','', strtolower($type_column) );
$length = $columns['attlen'];
if ($length == -1) {
$length = $columns['atttypmod']-4;
}
//$decimal = strtok('(), '); = eh?
$type = array();
switch($db_type) {
case 'int':
$type[0] = 'integer';
if($length == '1') {
$type[1] = 'boolean';
}
break;
case 'text':
case 'char':
case 'varchar':
case 'bpchar':
$type[0] = 'text';
if($length == '1') {
$type[1] = 'boolean';
} elseif(strstr($db_type, 'text'))
$type[1] = 'clob';
break;
/*
case 'enum':
preg_match_all('/\'.+\'/U',$row[$type_column], $matches);
$length = 0;
if(is_array($matches)) {
foreach($matches[0] as $value) {
$length = max($length, strlen($value)-2);
}
}
unset($decimal);
case 'set':
$type[0] = 'text';
$type[1] = 'integer';
break;
*/
case 'date':
$type[0] = 'date';
break;
case 'datetime':
case 'timestamp':
$type[0] = 'timestamp';
break;
case 'time':
$type[0] = 'time';
break;
case 'float':
case 'double':
case 'real':
$type[0] = 'float';
break;
case 'decimal':
case 'money':
case 'numeric':
$type[0] = 'decimal';
break;
case 'oid':
case 'tinyblob':
case 'mediumblob':
case 'longblob':
case 'blob':
$type[0] = 'blob';
$type[1] = 'text';
break;
case 'year':
$type[0] = 'integer';
$type[1] = 'date';
break;
default:
return($db->raiseError(MDB_ERROR_MANAGER, NULL, NULL,
'List table fields: unknown database attribute type'));
}
if ($columns['attnotnull'] == 'f') {
$notnull = 1;
}
if (!preg_match("/nextval\('([^']+)'/",$columns['adsrc'])) {
$default = substr($columns['adsrc'],1,-1);
}
$definition = array();
for($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 (preg_match("/nextval\('([^']+)'/",$columns['adsrc'],$nextvals)) {
$implicit_sequence = array();
$implicit_sequence['on'] = array();
$implicit_sequence['on']['table'] = $table;
$implicit_sequence['on']['field'] = $field_name;
$definition[1]['name'] = $nextvals[1];
$definition[1]['definition'] = $implicit_sequence;
}
// check that its not just a unique field
if(MDB::isError($indexes = $db->queryAll("SELECT
oid,indexrelid,indrelid,indkey,indisunique,indisprimary
FROm pg_index, pg_class
WHERE (pg_class.relname='$table')
AND (pg_class.oid=pg_index.indrelid)", NULL, MDB_FETCHMODE_ASSOC))) {
return $indexes;
}
$indkeys = explode(' ',$indexes['indkey']);
if (in_array($columns['attnum'],$indkeys)) {
if (MDB::isError($indexname = $db->queryAll("SELECT
relname FROM pg_class WHERE oid={$columns['indexrelid']}")) ) {
return $indexname;
}
$is_primary = ($indexes['isdisprimary'] == 't') ;
$is_unique = ($indexes['isdisunique'] == 't') ;
$implicit_index = array();
$implicit_index['unique'] = 1;
$implicit_index['FIELDS'][$field_name] = $indexname['relname'];
$definition[2]['name'] = $field_name;
$definition[2]['definition'] = $implicit_index;
}
$db->freeResult($result);
return($definition);
}
// }}}
// {{{ listViews()
/**
* list the views in the database
*
* @param object $db database object that is extended by this class
* @return mixed MDB_OK on success, a MDB error on failure
* @access public
**/
function listViews(&$db)
{
// gratuitously stolen from PEAR DB _getSpecialQuery in pgsql.php
return($db->queryCol('SELECT viewname FROM pg_views'));
}
// }}}
// {{{ listTableIndexes()
/**
* list all indexes in a table
*
* @param object $db database object that is extended by this class
* @param string $table name of table that should be used in method
* @return mixed data array on success, a MDB error on failure
* @access public
*/
function listTableIndexes(&$db, $table) {
$result = $db->query("SELECT relname
FROM pg_class WHERE oid IN
(SELECR indexrelid FROM pg_index, pg_class
WHERE (pg_class.relname='$table')
AND (pg_class.oid=pg_index.indrelid))");
return $db->fetchCol($result);
}
// }}}
// {{{ getTableIndexDefinition()
/**
* get the stucture of an index into an array
*
* @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 $index_name name of index that should be used in method
* @return mixed data array on success, a MDB error on failure
* @access public
*/
function getTableIndexDefinition(&$db, $table, $index_name)
{
$row = $db->queryAll("SELECT * from pg_index, pg_class
WHERE (pg_class.relname='$index_name')
AND (pg_class.oid=pg_index.indexrelid)", NULL, MDB_FETCHMODE_ASSOC);
if ($row[0]['relname'] != $index_name) {
return($db->raiseError(MDB_ERROR_MANAGER, NULL, NULL, 'Get table index definition: it was not specified an existing table index'));
}
$columns = $this->listTableFields($db, $table);
$definition = array();
if ($row[0]['indisunique'] == 't') {
$definition[$index_name]['unique'] = 1;
}
$index_column_numbers = explode(' ', $row[0]['indkey']);
foreach ($index_column_numbers as $number) {
$definition['FIELDS'][$columns[($number - 1)]] = array('sorting' => 'ascending');
}
return $definition;
}
// }}}
// {{{ createSequence()
/**
* create sequence
*
* @param object $db 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)
{
$seqname = $db->getSequenceName($seq_name);
return($db->query("CREATE SEQUENCE $seqname INCREMENT 1".($start < 1 ? " MINVALUE $start" : '')." START $start"));
}
// }}}
// {{{ dropSequence()
/**
* drop existing sequence
*
* @param object $db 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)
{
$seqname = $db->getSequenceName($seq_name);
return($db->query("DROP SEQUENCE $seqname"));
}
// }}}
// {{{ listSequences()
/**
* list all sequences in the current database
*
* @param object $db database object that is extended by this class
* @return mixed data array on success, a MDB error on failure
* @access public
**/
function listSequences(&$db)
{
// gratuitously stolen and adapted from PEAR DB _getSpecialQuery in pgsql.php
$sql = 'SELECT c.relname as "Name"
FROM pg_class c, pg_user u
WHERE c.relowner = u.usesysid AND c.relkind = \'S\'
AND not exists (select 1 from pg_views where viewname = c.relname)
AND c.relname !~ \'^pg_\'
UNION
SELECT c.relname as "Name"
FROM pg_class c
WHERE c.relkind = \'S\'
AND not exists (select 1 from pg_views where viewname = c.relname)
AND not exists (select 1 from pg_user where usesysid = c.relowner)
AND c.relname !~ \'^pg_\'';
return($db->queryCol($sql));
}
}
};
?>
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