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Forge.php
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265 lines (226 loc) · 7.73 KB
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<?php
declare(strict_types=1);
/**
* 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\MySQLi;
use CodeIgniter\Database\Forge as BaseForge;
/**
* Forge for MySQLi
*/
class Forge extends BaseForge
{
/**
* CREATE DATABASE statement
*
* @var string
*/
protected $createDatabaseStr = 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s';
/**
* CREATE DATABASE IF statement
*
* @var string
*/
protected $createDatabaseIfStr = 'CREATE DATABASE IF NOT EXISTS %s CHARACTER SET %s COLLATE %s';
/**
* DROP CONSTRAINT statement
*
* @var string
*/
protected $dropConstraintStr = 'ALTER TABLE %s DROP FOREIGN KEY %s';
/**
* CREATE TABLE keys flag
*
* Whether table keys are created from within the
* CREATE TABLE statement.
*
* @var bool
*/
protected $createTableKeys = true;
/**
* UNSIGNED support
*
* @var array
*/
protected $_unsigned = [
'TINYINT',
'SMALLINT',
'MEDIUMINT',
'INT',
'INTEGER',
'BIGINT',
'REAL',
'DOUBLE',
'DOUBLE PRECISION',
'FLOAT',
'DECIMAL',
'NUMERIC',
];
/**
* Table Options list which required to be quoted
*
* @var array
*/
protected $_quoted_table_options = [
'COMMENT',
'COMPRESSION',
'CONNECTION',
'DATA DIRECTORY',
'INDEX DIRECTORY',
'ENCRYPTION',
'PASSWORD',
];
/**
* 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
{
$sql = '';
foreach (array_keys($attributes) as $key) {
if (is_string($key)) {
$sql .= ' ' . strtoupper($key) . ' = ';
if (in_array(strtoupper($key), $this->_quoted_table_options, true)) {
$sql .= $this->db->escape($attributes[$key]);
} else {
$sql .= $this->db->escapeString($attributes[$key]);
}
}
}
if ($this->db->charset !== '' && ! str_contains($sql, 'CHARACTER SET') && ! str_contains($sql, 'CHARSET')) {
$sql .= ' DEFAULT CHARACTER SET = ' . $this->db->escapeString($this->db->charset);
}
if ($this->db->DBCollat !== '' && ! str_contains($sql, 'COLLATE')) {
$sql .= ' COLLATE = ' . $this->db->escapeString($this->db->DBCollat);
}
return $sql;
}
/**
* ALTER TABLE
*
* @param string $alterType ALTER type
* @param string $table Table name
* @param array|string $processedFields Processed column definitions
* or column names to DROP
*
* @return ($alterType is 'DROP' ? string : list<string>)
*/
protected function _alterTable(string $alterType, string $table, $processedFields)
{
if ($alterType === 'DROP') {
return parent::_alterTable($alterType, $table, $processedFields);
}
$sql = 'ALTER TABLE ' . $this->db->escapeIdentifiers($table);
foreach ($processedFields as $i => $field) {
if ($field['_literal'] !== false) {
$processedFields[$i] = ($alterType === 'ADD') ? "\n\tADD " . $field['_literal'] : "\n\tMODIFY " . $field['_literal'];
} else {
if ($alterType === 'ADD') {
$processedFields[$i]['_literal'] = "\n\tADD ";
} else {
$processedFields[$i]['_literal'] = empty($field['new_name']) ? "\n\tMODIFY " : "\n\tCHANGE ";
}
$processedFields[$i] = $processedFields[$i]['_literal'] . $this->_processColumn($processedFields[$i]);
}
}
return [$sql . implode(',', $processedFields)];
}
/**
* Process column
*/
protected function _processColumn(array $processedField): string
{
$extraClause = isset($processedField['after']) ? ' AFTER ' . $this->db->escapeIdentifiers($processedField['after']) : '';
if (empty($extraClause) && isset($processedField['first']) && $processedField['first'] === true) {
$extraClause = ' FIRST';
}
return $this->db->escapeIdentifiers($processedField['name'])
. (empty($processedField['new_name']) ? '' : ' ' . $this->db->escapeIdentifiers($processedField['new_name']))
. ' ' . $processedField['type'] . $processedField['length']
. $processedField['unsigned']
. $processedField['null']
. $processedField['default']
. $processedField['auto_increment']
. $processedField['unique']
. (empty($processedField['comment']) ? '' : ' COMMENT ' . $processedField['comment'])
. $extraClause;
}
/**
* Generates SQL to add indexes
*
* @param bool $asQuery When true returns stand alone SQL, else partial SQL used with CREATE TABLE
*/
protected function _processIndexes(string $table, bool $asQuery = false): array
{
$sqls = [''];
$index = 0;
for ($i = 0, $c = count($this->keys); $i < $c; $i++) {
$index = $i;
if ($asQuery === false) {
$index = 0;
}
if (isset($this->keys[$i]['fields'])) {
for ($i2 = 0, $c2 = count($this->keys[$i]['fields']); $i2 < $c2; $i2++) {
if (! isset($this->fields[$this->keys[$i]['fields'][$i2]])) {
unset($this->keys[$i]['fields'][$i2]);
continue;
}
}
}
if (! is_array($this->keys[$i]['fields'])) {
$this->keys[$i]['fields'] = [$this->keys[$i]['fields']];
}
$unique = in_array($i, $this->uniqueKeys, true) ? 'UNIQUE ' : '';
$keyName = $this->db->escapeIdentifiers(($this->keys[$i]['keyName'] === '') ?
implode('_', $this->keys[$i]['fields']) :
$this->keys[$i]['keyName']);
if ($asQuery) {
$sqls[$index] = 'ALTER TABLE ' . $this->db->escapeIdentifiers($table) . " ADD {$unique}KEY "
. $keyName
. ' (' . implode(', ', $this->db->escapeIdentifiers($this->keys[$i]['fields'])) . ')';
} else {
$sqls[$index] .= ",\n\t{$unique}KEY " . $keyName
. ' (' . implode(', ', $this->db->escapeIdentifiers($this->keys[$i]['fields'])) . ')';
}
}
$this->keys = [];
return $sqls;
}
/**
* Drop Key
*/
public function dropKey(string $table, string $keyName, bool $prefixKeyName = true): bool
{
$sql = sprintf(
$this->dropIndexStr,
$this->db->escapeIdentifiers($keyName),
$this->db->escapeIdentifiers($this->db->DBPrefix . $table),
);
return $this->db->query($sql);
}
/**
* Drop Primary Key
*/
public function dropPrimaryKey(string $table, string $keyName = ''): bool
{
$sql = sprintf(
'ALTER TABLE %s DROP PRIMARY KEY',
$this->db->escapeIdentifiers($this->db->DBPrefix . $table),
);
return $this->db->query($sql);
}
}