%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* This file is part of the Dibi, smart database abstraction layer (https://dibiphp.com)
* Copyright (c) 2005 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Dibi\Drivers;
use Dibi;
/**
* The reflector for MySQL databases.
* @internal
*/
class MySqlReflector implements Dibi\Reflector
{
use Dibi\Strict;
/** @var Dibi\Driver */
private $driver;
public function __construct(Dibi\Driver $driver)
{
$this->driver = $driver;
}
/**
* Returns list of tables.
*/
public function getTables(): array
{
$res = $this->driver->query('SHOW FULL TABLES');
$tables = [];
while ($row = $res->fetch(false)) {
$tables[] = [
'name' => $row[0],
'view' => isset($row[1]) && $row[1] === 'VIEW',
];
}
return $tables;
}
/**
* Returns metadata for all columns in a table.
*/
public function getColumns(string $table): array
{
$res = $this->driver->query("SHOW FULL COLUMNS FROM {$this->driver->escapeIdentifier($table)}");
$columns = [];
while ($row = $res->fetch(true)) {
$type = explode('(', $row['Type']);
$columns[] = [
'name' => $row['Field'],
'table' => $table,
'nativetype' => strtoupper($type[0]),
'size' => isset($type[1]) ? (int) $type[1] : null,
'nullable' => $row['Null'] === 'YES',
'default' => $row['Default'],
'autoincrement' => $row['Extra'] === 'auto_increment',
'vendor' => $row,
];
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
*/
public function getIndexes(string $table): array
{
$res = $this->driver->query("SHOW INDEX FROM {$this->driver->escapeIdentifier($table)}");
$indexes = [];
while ($row = $res->fetch(true)) {
$indexes[$row['Key_name']]['name'] = $row['Key_name'];
$indexes[$row['Key_name']]['unique'] = !$row['Non_unique'];
$indexes[$row['Key_name']]['primary'] = $row['Key_name'] === 'PRIMARY';
$indexes[$row['Key_name']]['columns'][$row['Seq_in_index'] - 1] = $row['Column_name'];
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
* @throws Dibi\NotSupportedException
*/
public function getForeignKeys(string $table): array
{
$data = $this->driver->query("SELECT `ENGINE` FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = {$this->driver->escapeText($table)}")->fetch(true);
if ($data['ENGINE'] !== 'InnoDB') {
throw new Dibi\NotSupportedException("Foreign keys are not supported in {$data['ENGINE']} tables.");
}
$res = $this->driver->query("
SELECT rc.CONSTRAINT_NAME, rc.UPDATE_RULE, rc.DELETE_RULE, kcu.REFERENCED_TABLE_NAME,
GROUP_CONCAT(kcu.REFERENCED_COLUMN_NAME ORDER BY kcu.ORDINAL_POSITION) AS REFERENCED_COLUMNS,
GROUP_CONCAT(kcu.COLUMN_NAME ORDER BY kcu.ORDINAL_POSITION) AS COLUMNS
FROM information_schema.REFERENTIAL_CONSTRAINTS rc
INNER JOIN information_schema.KEY_COLUMN_USAGE kcu ON
kcu.CONSTRAINT_NAME = rc.CONSTRAINT_NAME
AND kcu.CONSTRAINT_SCHEMA = rc.CONSTRAINT_SCHEMA
WHERE rc.CONSTRAINT_SCHEMA = DATABASE()
AND rc.TABLE_NAME = {$this->driver->escapeText($table)}
GROUP BY rc.CONSTRAINT_NAME
");
$foreignKeys = [];
while ($row = $res->fetch(true)) {
$keyName = $row['CONSTRAINT_NAME'];
$foreignKeys[$keyName]['name'] = $keyName;
$foreignKeys[$keyName]['local'] = explode(',', $row['COLUMNS']);
$foreignKeys[$keyName]['table'] = $row['REFERENCED_TABLE_NAME'];
$foreignKeys[$keyName]['foreign'] = explode(',', $row['REFERENCED_COLUMNS']);
$foreignKeys[$keyName]['onDelete'] = $row['DELETE_RULE'];
$foreignKeys[$keyName]['onUpdate'] = $row['UPDATE_RULE'];
}
return array_values($foreignKeys);
}
}
Zerion Mini Shell 1.0