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Directory : /var/www/vhosts/lautnusantara.com/httpdocs/web/system/Database/Postgre/ |
<?php
/**
* This file is part of CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <admin@codeigniter.com>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace CodeIgniter\Database\Postgre;
use CodeIgniter\Database\Forge as BaseForge;
/**
* Forge for Postgre
*/
class Forge extends BaseForge
{
/**
* CHECK DATABASE EXIST statement
*
* @var string
*/
protected $checkDatabaseExistStr = 'SELECT 1 FROM pg_database WHERE datname = ?';
/**
* DROP CONSTRAINT statement
*
* @var string
*/
protected $dropConstraintStr = 'ALTER TABLE %s DROP CONSTRAINT %s';
/**
* DROP INDEX statement
*
* @var string
*/
protected $dropIndexStr = 'DROP INDEX %s';
/**
* UNSIGNED support
*
* @var array
*/
protected $_unsigned = [
'INT2' => 'INTEGER',
'SMALLINT' => 'INTEGER',
'INT' => 'BIGINT',
'INT4' => 'BIGINT',
'INTEGER' => 'BIGINT',
'INT8' => 'NUMERIC',
'BIGINT' => 'NUMERIC',
'REAL' => 'DOUBLE PRECISION',
'FLOAT' => 'DOUBLE PRECISION',
];
/**
* NULL value representation in CREATE/ALTER TABLE statements
*
* @var string
*
* @internal
*/
protected $null = 'NULL';
/**
* CREATE TABLE attributes
*
* @param array $attributes Associative array of table attributes
*/
protected function _createTableAttributes(array $attributes): string
{
return '';
}
/**
* @param array|string $field
*
* @return array|bool|string
*/
protected function _alterTable(string $alterType, string $table, $field)
{
if (in_array($alterType, ['DROP', 'ADD'], true)) {
return parent::_alterTable($alterType, $table, $field);
}
$sql = 'ALTER TABLE ' . $this->db->escapeIdentifiers($table);
$sqls = [];
foreach ($field as $data) {
if ($data['_literal'] !== false) {
return false;
}
if (version_compare($this->db->getVersion(), '8', '>=') && isset($data['type'])) {
$sqls[] = $sql . ' ALTER COLUMN ' . $this->db->escapeIdentifiers($data['name'])
. " TYPE {$data['type']}{$data['length']}";
}
if (! empty($data['default'])) {
$sqls[] = $sql . ' ALTER COLUMN ' . $this->db->escapeIdentifiers($data['name'])
. " SET DEFAULT {$data['default']}";
}
if (isset($data['null'])) {
$sqls[] = $sql . ' ALTER COLUMN ' . $this->db->escapeIdentifiers($data['name'])
. ($data['null'] === true ? ' DROP' : ' SET') . ' NOT NULL';
}
if (! empty($data['new_name'])) {
$sqls[] = $sql . ' RENAME COLUMN ' . $this->db->escapeIdentifiers($data['name'])
. ' TO ' . $this->db->escapeIdentifiers($data['new_name']);
}
if (! empty($data['comment'])) {
$sqls[] = 'COMMENT ON COLUMN' . $this->db->escapeIdentifiers($table)
. '.' . $this->db->escapeIdentifiers($data['name'])
. " IS {$data['comment']}";
}
}
return $sqls;
}
/**
* Process column
*/
protected function _processColumn(array $field): string
{
return $this->db->escapeIdentifiers($field['name'])
. ' ' . $field['type'] . $field['length']
. $field['default']
. $field['null']
. $field['auto_increment']
. $field['unique'];
}
/**
* Performs a data type mapping between different databases.
*/
protected function _attributeType(array &$attributes)
{
// Reset field lengths for data types that don't support it
if (isset($attributes['CONSTRAINT']) && stripos($attributes['TYPE'], 'int') !== false) {
$attributes['CONSTRAINT'] = null;
}
switch (strtoupper($attributes['TYPE'])) {
case 'TINYINT':
$attributes['TYPE'] = 'SMALLINT';
$attributes['UNSIGNED'] = false;
break;
case 'MEDIUMINT':
$attributes['TYPE'] = 'INTEGER';
$attributes['UNSIGNED'] = false;
break;
case 'DATETIME':
$attributes['TYPE'] = 'TIMESTAMP';
break;
default:
break;
}
}
/**
* Field attribute AUTO_INCREMENT
*/
protected function _attributeAutoIncrement(array &$attributes, array &$field)
{
if (! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === true) {
$field['type'] = $field['type'] === 'NUMERIC' || $field['type'] === 'BIGINT' ? 'BIGSERIAL' : 'SERIAL';
}
}
/**
* Generates a platform-specific DROP TABLE string
*/
protected function _dropTable(string $table, bool $ifExists, bool $cascade): string
{
$sql = parent::_dropTable($table, $ifExists, $cascade);
if ($cascade === true) {
$sql .= ' CASCADE';
}
return $sql;
}
}