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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. |
// +----------------------------------------------------------------------+
// | Authors: Paul Cooper <pgc@ucecom.com> |
// | Lorenzo Alberton <l.alberton@quipo.it> |
// +----------------------------------------------------------------------+
//
// $Id: pgsql.php,v 1.60 2007/03/29 18:18:06 quipo Exp $
require_once 'MDB2/Driver/Reverse/Common.php';
/**
* MDB2 PostGreSQL driver for the schema reverse engineering module
*
* @package MDB2
* @category Database
* @author Paul Cooper <pgc@ucecom.com>
*/
class MDB2_Driver_Reverse_pgsql extends MDB2_Driver_Reverse_Common
{
// {{{ getTableFieldDefinition()
/**
* Get the structure of a field into an array
*
* @param string $table name of table that should be used in method
* @param string $field_name name of field that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableFieldDefinition($table, $field_name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$result = $db->loadModule('Datatype', null, true);
if (PEAR::isError($result)) {
return $result;
}
$query = "SELECT a.attname AS name,
t.typname AS type,
CASE a.attlen
WHEN -1 THEN
CASE t.typname
WHEN 'numeric' THEN (a.atttypmod / 65536)
WHEN 'decimal' THEN (a.atttypmod / 65536)
WHEN 'money' THEN (a.atttypmod / 65536)
ELSE CASE a.atttypmod
WHEN -1 THEN NULL
ELSE a.atttypmod - 4
END
END
ELSE a.attlen
END AS length,
CASE t.typname
WHEN 'numeric' THEN (a.atttypmod % 65536) - 4
WHEN 'decimal' THEN (a.atttypmod % 65536) - 4
WHEN 'money' THEN (a.atttypmod % 65536) - 4
ELSE 0
END AS scale,
a.attnotnull,
a.atttypmod,
a.atthasdef,
(SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
FROM pg_attrdef d
WHERE d.adrelid = a.attrelid
AND d.adnum = a.attnum
AND a.atthasdef
) as default
FROM pg_attribute a,
pg_class c,
pg_type t
WHERE c.relname = ".$db->quote($table, 'text')."
AND a.atttypid = t.oid
AND c.oid = a.attrelid
AND NOT a.attisdropped
AND a.attnum > 0
AND a.attname = ".$db->quote($field_name, 'text')."
ORDER BY a.attnum";
$column = $db->queryRow($query, null, MDB2_FETCHMODE_ASSOC);
if (PEAR::isError($column)) {
return $column;
}
if (empty($column)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table column', __FUNCTION__);
}
$column = array_change_key_case($column, CASE_LOWER);
$mapped_datatype = $db->datatype->mapNativeDatatype($column);
if (PEAR::IsError($mapped_datatype)) {
return $mapped_datatype;
}
list($types, $length, $unsigned, $fixed) = $mapped_datatype;
$notnull = false;
if (!empty($column['attnotnull']) && $column['attnotnull'] == 't') {
$notnull = true;
}
$default = null;
if ($column['atthasdef'] === 't'
&& !preg_match("/nextval\('([^']+)'/", $column['default'])
) {
$default = $column['default'];#substr($column['adsrc'], 1, -1);
if (is_null($default) && $notnull) {
$default = '';
}
}
$autoincrement = false;
if (preg_match("/nextval\('([^']+)'/", $column['default'], $nextvals)) {
$autoincrement = true;
}
$definition[0] = array('notnull' => $notnull, 'nativetype' => $column['type']);
if (!is_null($length)) {
$definition[0]['length'] = $length;
}
if (!is_null($unsigned)) {
$definition[0]['unsigned'] = $unsigned;
}
if (!is_null($fixed)) {
$definition[0]['fixed'] = $fixed;
}
if ($default !== false) {
$definition[0]['default'] = $default;
}
if ($autoincrement !== false) {
$definition[0]['autoincrement'] = $autoincrement;
}
foreach ($types as $key => $type) {
$definition[$key] = $definition[0];
if ($type == 'clob' || $type == 'blob') {
unset($definition[$key]['default']);
}
$definition[$key]['type'] = $type;
$definition[$key]['mdb2type'] = $type;
}
return $definition;
}
// }}}
// {{{ getTableIndexDefinition()
/**
* Get the structure of an index into an array
*
* @param string $table name of table that should be used in method
* @param string $index_name name of index that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableIndexDefinition($table, $index_name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = 'SELECT relname, indkey FROM pg_index, pg_class';
$query.= ' WHERE pg_class.oid = pg_index.indexrelid';
$query.= " AND indisunique != 't' AND indisprimary != 't'";
$query.= ' AND pg_class.relname = %s';
$index_name_mdb2 = $db->getIndexName($index_name);
$row = $db->queryRow(sprintf($query, $db->quote($index_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
if (PEAR::isError($row) || empty($row)) {
// fallback to the given $index_name, without transformation
$row = $db->queryRow(sprintf($query, $db->quote($index_name, 'text')), null, MDB2_FETCHMODE_ASSOC);
}
if (PEAR::isError($row)) {
return $row;
}
if (empty($row)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
'it was not specified an existing table index', __FUNCTION__);
}
$row = array_change_key_case($row, CASE_LOWER);
$db->loadModule('Manager', null, true);
$columns = $db->manager->listTableFields($table);
$definition = array();
$index_column_numbers = explode(' ', $row['indkey']);
$colpos = 1;
foreach ($index_column_numbers as $number) {
$definition['fields'][$columns[($number - 1)]] = array(
'position' => $colpos++,
'sorting' => 'ascending',
);
}
return $definition;
}
// }}}
// {{{ getTableConstraintDefinition()
/**
* Get the structure of a constraint into an array
*
* @param string $table name of table that should be used in method
* @param string $constraint_name name of constraint that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*/
function getTableConstraintDefinition($table, $constraint_name)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = 'SELECT relname, indisunique, indisprimary, indkey FROM pg_index, pg_class';
$query.= ' WHERE pg_class.oid = pg_index.indexrelid';
$query.= " AND (indisunique = 't' OR indisprimary = 't')";
$query.= ' AND pg_class.relname = %s';
$constraint_name_mdb2 = $db->getIndexName($constraint_name);
$row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
if (PEAR::isError($row) || empty($row)) {
// fallback to the given $index_name, without transformation
$row = $db->queryRow(sprintf($query, $db->quote($constraint_name, 'text')), null, MDB2_FETCHMODE_ASSOC);
}
if (PEAR::isError($row)) {
return $row;
}
if (empty($row)) {
return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
$constraint_name . ' is not an existing table constraint', __FUNCTION__);
}
$row = array_change_key_case($row, CASE_LOWER);
$db->loadModule('Manager', null, true);
$columns = $db->manager->listTableFields($table);
$definition = array();
if ($row['indisprimary'] == 't') {
$definition['primary'] = true;
} elseif ($row['indisunique'] == 't') {
$definition['unique'] = true;
}
$index_column_numbers = explode(' ', $row['indkey']);
$colpos = 1;
foreach ($index_column_numbers as $number) {
$definition['fields'][$columns[($number - 1)]] = array(
'position' => $colpos++,
'sorting' => 'ascending',
);
}
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 $trigger name of trigger that should be used in method
* @return mixed data array on success, a MDB2 error on failure
* @access public
*
* @TODO: add support for plsql functions and functions with args
*/
function getTriggerDefinition($trigger)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$query = "SELECT trg.tgname AS trigger_name,
tbl.relname AS table_name,
CASE
WHEN p.proname IS NOT NULL THEN 'EXECUTE PROCEDURE ' || p.proname || '();'
ELSE ''
END AS trigger_body,
CASE trg.tgtype & cast(2 as int2)
WHEN 0 THEN 'AFTER'
ELSE 'BEFORE'
END AS trigger_type,
CASE trg.tgtype & cast(28 as int2)
WHEN 16 THEN 'UPDATE'
WHEN 8 THEN 'DELETE'
WHEN 4 THEN 'INSERT'
WHEN 20 THEN 'INSERT, UPDATE'
WHEN 28 THEN 'INSERT, UPDATE, DELETE'
WHEN 24 THEN 'UPDATE, DELETE'
WHEN 12 THEN 'INSERT, DELETE'
END AS trigger_event,
trg.tgenabled AS trigger_enabled,
obj_description(trg.oid, 'pg_trigger') AS trigger_comment
FROM pg_trigger trg,
pg_class tbl,
pg_proc p
WHERE trg.tgrelid = tbl.oid
AND trg.tgfoid = p.oid
AND trg.tgname = ". $db->quote($trigger, 'text');
$types = array(
'trigger_name' => 'text',
'table_name' => 'text',
'trigger_body' => 'text',
'trigger_type' => 'text',
'trigger_event' => 'text',
'trigger_comment' => 'text',
'trigger_enabled' => 'boolean',
);
return $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
}
// }}}
// {{{ tableInfo()
/**
* Returns information about a table or a result set
*
* NOTE: only supports 'table' and 'flags' if <var>$result</var>
* is a table name.
*
* @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 $mode a valid tableInfo mode
*
* @return array an associative array with the information requested.
* A MDB2_Error object on failure.
*
* @see MDB2_Driver_Common::tableInfo()
*/
function tableInfo($result, $mode = null)
{
if (is_string($result)) {
return parent::tableInfo($result, $mode);
}
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$resource = MDB2::isResultCommon($result) ? $result->getResource() : $result;
if (!is_resource($resource)) {
return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
'Could not generate result resource', __FUNCTION__);
}
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
if ($db->options['field_case'] == CASE_LOWER) {
$case_func = 'strtolower';
} else {
$case_func = 'strtoupper';
}
} else {
$case_func = 'strval';
}
$count = @pg_num_fields($resource);
$res = array();
if ($mode) {
$res['num_fields'] = $count;
}
$db->loadModule('Datatype', null, true);
for ($i = 0; $i < $count; $i++) {
$res[$i] = array(
'table' => function_exists('pg_field_table') ? @pg_field_table($resource, $i) : '',
'name' => $case_func(@pg_field_name($resource, $i)),
'type' => @pg_field_type($resource, $i),
'length' => @pg_field_size($resource, $i),
'flags' => '',
);
$mdb2type_info = $db->datatype->mapNativeDatatype($res[$i]);
if (PEAR::isError($mdb2type_info)) {
return $mdb2type_info;
}
$res[$i]['mdb2type'] = $mdb2type_info[0][0];
if ($mode & MDB2_TABLEINFO_ORDER) {
$res['order'][$res[$i]['name']] = $i;
}
if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
}
}
return $res;
}
}
?>
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