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<?php
class LayerPGSQL extends AbstractLayer
{
# Generic
public static function protect($value,$alias=NULL)
{
return '"'.str_replace('.','"."',$value).'"'.($alias?' "'.$alias.'"':'');
}
# saveloadlist
public static function Keywords($table,$keyword='')
{
$req = '
SELECT
';
if($keyword)
$req .= ' '.self::protect('xmldata').' ';
else
$req .= ' '.self::protect('keyword').' ';
$req .= '
FROM '.self::protect($table).'
';
if($keyword)
$req .= ' WHERE '.self::protect('keyword').' = ? ';
else
$req .= ' ORDER BY '.self::protect('dt').' DESC ';
$q = self::$pdo->prepare($req);
if($keyword)
$q->bindValue($keyword,'string');
return $q->execute();
}
public static function KeywordsInsert($table,$keyword,$data)
{
$req = '
INSERT INTO '.self::protect($table).'
('.self::protect('keyword').', '.self::protect('xmldata').')
VALUES (?, ?)
';
return self::$pdo->prepare($req)->bindValue($keyword,'string')->bindValue($data,'string')->execute();
}
public static function KeywordsUpdate($table,$keyword,$data)
{
$req = '
UPDATE '.self::protect($table).'
SET '.self::protect('xmldata').' = ?
WHERE '.self::protect('keyword').' = ?
';
return self::$pdo->prepare($req)->bindValue($data,'string')->bindValue($keyword,'string')->execute();
}
# datatypes
public static function DatatypesFile()
{
return dirname(__FILE__).'/../../db/postgresql/datatypes.xml';
}
# model
public static function Tables()
{
$req = '
SELECT
'.self::protect('relname').' as '.self::protect('name').',
'.self::protect('c.oid').' as '.self::protect('oid').',
(SELECT pg_catalog.obj_description('.self::protect('c.oid').', \'pg_class\')) as '.self::protect('comment').'
FROM pg_catalog.pg_class '.self::protect('c').'
WHERE
'.self::protect('c.relname').' !~ \'^(pg_|sql_)\'
AND '.self::protect('c.relkind').' = \'r\'
';
return self::$pdo->prepare($req)->execute()->fetchAll();
}
private static $columns = array();
public static function Columns($table)
{
if(isset(self::$columns[$table['name']]))
return self::$columns[$table['name']];
if(!empty(self::$columns))
return array();
$req = '
SELECT
'.self::protect('table_name').' as '.self::protect('table').',
'.self::protect('column_name').' as '.self::protect('name').',
'.self::protect('data_type').' as '.self::protect('type').',
'.self::protect('is_nullable').' as '.self::protect('null').',
'.self::protect('column_default').' as '.self::protect('default')/*.',
* col_description(? ,ordinal_position) as '.self::protect('comment').'*/.'
FROM information_schema.columns
ORDER BY '.self::protect('ordinal_position').'
';
$columns = self::$pdo->prepare($req)->execute()->fetchAll();
foreach($columns as $k=>$column)
{
$column['type'] = strtoupper($column['type']);
$column['null'] = ($column['null'] == 'YES' ? '1' : '0');
$column['default'] = ($column['default'] == 'NULL' ? '' : $column['default']);
$column['autoincrement'] = '0';
self::$columns[$column['table']][] = $column;
}
return self::$columns[$table['name']];
}
private static $relations = array();
public static function Relations($table,$column)
{
if(isset(self::$relations[$table['name']][$column['name']]))
return self::$relations[$table['name']][$column['name']];
if(!empty(self::$relations))
return array();
$req = '
SELECT
'.self::protect('kku.table_name').' as '.self::protect('table_src').',
'.self::protect('kku.column_name').' as '.self::protect('column_src').',
'.self::protect('ccu.table_name').' as '.self::protect('table').',
'.self::protect('ccu.column_name').' as '.self::protect('column').'
FROM '.self::protect('information_schema.table_constraints','tc').'
LEFT JOIN '.self::protect('information_schema.constraint_column_usage','ccu').'
ON '.self::protect('tc.constraint_name').' = '.self::protect('ccu.constraint_name').'
LEFT JOIN '.self::protect('information_schema.key_column_usage','kku').'
ON '.self::protect('kku.constraint_name').' = '.self::protect('ccu.constraint_name').'
WHERE
'.self::protect('constraint_type').' = ?
';
$relations = self::$pdo->prepare($req)->bindValue('FOREIGN KEY','string')->execute()->fetchAll();
foreach($relations as $relation)
self::$relations[$relation['table_src']][$relation['column_src']][] = $relation;
if(isset(self::$relations[$table['name']][$column['name']]))
return self::$relations[$table['name']][$column['name']];
return array();
}
private static $keys = array();
public static function Keys($table)
{
if(isset(self::$keys[$table['name']]))
return self::$keys[$table['name']];
if(!empty(self::$keys))
return array();
$req = '
SELECT
'.self::protect('tc.table_name').' as '.self::protect('table').',
'.self::protect('tc.constraint_name').' as '.self::protect('name').',
'.self::protect('tc.constraint_type').' as '.self::protect('type').',
'.self::protect('kcu.column_name').' as '.self::protect('column').'
FROM '.self::protect('information_schema.table_constraints','tc').'
LEFT JOIN '.self::protect('information_schema.key_column_usage','kcu').'
ON '.self::protect('tc.constraint_catalog').' = '.self::protect('tc.constraint_catalog').'
AND '.self::protect('tc.constraint_schema').' = '.self::protect('kcu.constraint_schema').'
AND '.self::protect('tc.constraint_name').' = '.self::protect('kcu.constraint_name').'
WHERE
'.self::protect('constraint_type').' != ?
ORDER BY '.self::protect('tc.constraint_name').'
';
$contraints = self::$pdo->prepare($req)->bindValue('FOREIGN KEY','string')->execute()->fetchAll();
$req = '
SELECT
'.self::protect('pci.relname').' as '.self::protect('table').',
'.self::protect('pcx.relname').' as '.self::protect('name').',
'.self::protect('pa.attname').' as '.self::protect('column').',
'.self::protect('indisunique').' as '.self::protect('unique').',
'.self::protect('indisprimary').' as '.self::protect('primary').'
FROM '.self::protect('pg_index','pi').'
LEFT JOIN '.self::protect('pg_class','pcx').'
ON '.self::protect('pi.indexrelid').' = '.self::protect('pcx.oid').'
LEFT JOIN '.self::protect('pg_class','pci').'
ON '.self::protect('pi.indrelid').' = '.self::protect('pci.oid').'
LEFT JOIN '.self::protect('pg_attribute','pa').'
ON '.self::protect('pa.attrelid').' = '.self::protect('pci.oid').'
AND '.self::protect('pa.attnum').' = ANY('.self::protect('pi.indkey').')
ORDER BY '.self::protect('pa.attnum').'
';
$indexes = self::$pdo->prepare($req)->execute()->fetchAll();
$keys = array();
foreach($contraints as $constraint)
{
if($constraint['type'] == 'CHECK')
continue;
if($constraint['type'] == 'PRIMARY KEY')
$constraint['type'] = 'PRIMARY';
self::$keys[$constraint['table']][$constraint['name']]['type'] = $constraint['type'];
self::$keys[$constraint['table']][$constraint['name']]['columns'][] = $constraint['column'];
}
foreach($indexes as $index)
{
if($index['unique'] == 't' || $index['primary'] == 't')
continue;
self::$keys[$index['table']][$index['name']]['type'] = 'INDEX';
self::$keys[$index['table']][$index['name']]['columns'][] = $index['column'];
}
return self::$keys[$table['name']];
}
}
?>
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