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<?php |
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namespace suda\application\database\creator; |
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use suda\database\struct\Field; |
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use suda\database\struct\TableStruct; |
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use suda\database\connection\Connection; |
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use suda\database\exception\SQLException; |
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use suda\application\database\TableCreator; |
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use suda\database\statement\QueryStatement; |
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/** |
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* 数据表链接对象 |
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* |
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*/ |
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class MySQLTableCreator extends TableCreator |
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{ |
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/** |
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* 连接 |
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* |
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* @var Connection |
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*/ |
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protected $connection; |
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/** |
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* 字段 |
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* |
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* @var TableStruct |
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*/ |
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protected $fields; |
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/** |
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* |
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*/ |
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const ENGINE_MYISAM = 'MyISAM'; |
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/** |
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* |
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*/ |
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const ENGINE_INNODB = 'InnoDB'; |
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/** |
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* @var string |
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*/ |
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protected $name; |
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/** |
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* @var string |
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*/ |
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protected $engine = self::ENGINE_INNODB; |
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/** |
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* @var |
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*/ |
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protected $comment; |
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/** |
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* @var |
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*/ |
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protected $collate; |
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/** |
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* @var string |
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*/ |
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protected $charset = 'utf8mb4'; |
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/** |
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* @var |
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*/ |
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protected $auto; |
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/** |
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* @param Connection $connection |
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* @param TableStruct $fields |
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* @return bool |
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* @throws SQLException |
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*/ |
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public function create(Connection $connection, TableStruct $fields) |
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{ |
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$this->name = $fields->getName(); |
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$this->fields = $fields; |
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$this->connection = $connection; |
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$statement = new QueryStatement($this->toSQL()); |
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$statement->setType(QueryStatement::WRITE); |
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return $this->connection->query($statement) > 0; |
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} |
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/** |
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* @return string |
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*/ |
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public function toSQL() |
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{ |
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$content = []; |
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foreach ($this->fields->all() as $field) { |
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$content[] = $this->createField($field); |
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} |
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$content[] = $this->parsePrimaryKeys(); |
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$content = $this->parseUniqueKeys($content); |
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$content = $this->parseIndexKeys($content); |
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$content = $this->parseKeys($content); |
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$content = $this->parseForeignKeys($content); |
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$table = $this->fields->getRealTableName($this->connection); |
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$sql = "CREATE TABLE IF NOT EXISTS `{$table}` (\r\n\t"; |
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$sql .= implode(",\r\n\t", array_filter($content, 'strlen')); |
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$auto = null === $this->auto?'':'AUTO_INCREMENT='.$this->auto; |
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$collate = null === $this->collate?'':'COLLATE '.$this->collate; |
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$sql .= "\r\n) ENGINE={$this->engine} {$collate} {$auto} DEFAULT CHARSET={$this->charset};"; |
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return $sql; |
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} |
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/** |
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* @return string |
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*/ |
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protected function parsePrimaryKeys() |
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{ |
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$primary = []; |
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foreach ($this->fields->all() as $field) { |
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if ($field->getType() === Field::PRIMARY) { |
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$primary[] = '`'.$field->getName().'`'; |
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} |
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} |
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if (count($primary)) { |
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return 'PRIMARY KEY ('. implode(',', $primary).')'; |
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} |
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return ''; |
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} |
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/** |
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* @param array $content |
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* @return array |
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*/ |
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protected function parseUniqueKeys(array $content) |
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{ |
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foreach ($this->fields->all() as $field) { |
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if ($field->getType() === Field::UNIQUE) { |
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$content[] = 'UNIQUE KEY `'.$field->getName().'` (`'.$field->getName().'`)'; |
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} |
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} |
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return $content; |
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} |
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/** |
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* @param array $content |
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* @return array |
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*/ |
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protected function parseIndexKeys(array $content) |
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{ |
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foreach ($this->fields->all() as $field) { |
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if ($field->getType() === Field::INDEX) { |
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$content[] = 'INDEX (`'.$field->getName().'`)'; |
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} |
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} |
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return $content; |
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} |
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/** |
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* @param array $content |
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* @return array |
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*/ |
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protected function parseKeys(array $content) |
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{ |
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foreach ($this->fields->all() as $field) { |
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if ($field->getType() === Field::KEY) { |
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$content[] = 'KEY `'.$field->getName().'` (`'.$field->getName().'`)'; |
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} |
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} |
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return $content; |
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} |
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/** |
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* @param array $content |
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* @return array |
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*/ |
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protected function parseForeignKeys(array $content) |
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{ |
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foreach ($this->fields->all() as $field) { |
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if ($field->getForeignKey() !== null) { |
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$content[] = sprintf( |
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"FOREIGN KEY (`%s`) REFERENCES `_:%s` (`%s`)", |
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$field->getName(), |
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$field->getTableName(), |
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$field->getName() |
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); |
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} |
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} |
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return $content; |
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} |
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/** |
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* @param $length |
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* @return string |
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*/ |
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protected function parseLength($length) |
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{ |
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if ($length !== null) { |
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if (is_string($length) || is_int($length)) { |
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return '('.$length.')'; |
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} |
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if (is_array($length)) { |
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return '('.implode(',', $length).')'; |
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} |
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} |
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return ''; |
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} |
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/** |
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* @param Field $field |
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* @return string |
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*/ |
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protected function createField(Field $field) |
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{ |
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$type = strtoupper($field->getValueType()).$this->parseLength($field->getLength()); |
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$auto = $field->getAuto() ?'AUTO_INCREMENT':''; |
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$null = $field->isNullable() === null? '': $field->isNullable() === true ? 'NULL':'NOT NULL'; |
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$attr = $field->getAttribute() ?strtoupper($field->getAttribute()):''; |
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$comment = $field->getComment() ?('COMMENT \''.addcslashes($field->getComment(), '\'').'\''):''; |
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// default设置 |
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if ($field->hasDefault()) { |
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if (null === $field->getDefault()) { |
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$default = 'DEFAULT NULL'; |
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} else { |
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$default = 'DEFAULT \''.addcslashes($field->getDefault(), '\'').'\''; |
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} |
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} else { |
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$default = ''; |
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} |
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$list = ['`'.$field->getName().'`', $type, $attr, $field->getCharset(), $null, $default, $auto, $comment]; |
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return implode(' ', array_filter(array_map('trim', $list), 'strlen')); |
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} |
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} |
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