title: DDL meta:

  • name: description content: The Database Definition Language (DDL) is a language used to describe real-world entities to be stored in a database. Easyswoole provides a DDL library that is easy for users to define a database table structure.
  • name: keywords content: swoole|swoole extension|swoole framework|Easyswoole|DDL|database statement generation|sql DDL

DDL

The Database Definition Language (DDL) is a language used to describe real-world entities to be stored in a database. Easyswoole provides a DDL library that is easy for users to define a database table structure.

Installation

  1. composer require easyswoole/ddl

Test code

  1. use EasySwoole\DDL\Blueprint\Table;
  2. use EasySwoole\DDL\DDLBuilder;
  3. use EasySwoole\DDL\Enum\Character;
  4. use EasySwoole\DDL\Enum\Engine;
  6. $sql = DDLBuilder::table('user', function (Table $table) {
  8.     $table->setTableComment('User table')//Set the table name/
  9.     ->setTableEngine(Engine::MYISAM)//Setting the table engine
  10.     ->setTableCharset(Character::UTF8MB4_GENERAL_CI);//Set table character set
  11.     $table->colInt('user_id', 10)->setColumnComment('User ID')->setIsAutoIncrement()->setIsPrimaryKey();
  12.     $table->colVarChar('username')->setColumnLimit(30)->setIsNotNull()->setColumnComment('用户名');
  13.     $table->colChar('sex', 1)->setIsNotNull()->setDefaultValue(1)->setColumnComment('Gender: 1 male, 2 female');
  14.     $table->colTinyInt('age')->setIsUnsigned()->setColumnComment('age')->setIsNotNull();
  15.     $table->colInt('created_at', 10)->setIsNotNull()->setColumnComment('Creation time');
  16.     $table->colInt('updated_at', 10)->setIsNotNull()->setColumnComment('Update time');
  17.     $table->indexUnique('username_index', 'username');//Setting index
  18. });
  19. echo $sql;
  21. //Results are as follows
  24. CREATE TABLE `user` (
  25.   `user_id` int(10) NOT NULL PRIMARY KEY AUTO_INCREMENT COMMENT '用户ID',
  26.   `username` varchar(30) NOT NULL COMMENT 'username',
  27.   `sex` char(1) NOT NULL COMMENT 'Gender: 1 male, 2 female',
  28.   `age` tinyint UNSIGNED NOT NULL COMMENT 'age',
  29.   `created_at` int(10) NOT NULL COMMENT 'Creation time',
  30.   `updated_at` int(10) NOT NULL COMMENT 'Update time',
  31.   UNIQUE INDEX `username_index` (`username`)
  32. )
  33. ENGINE = MYISAM DEFAULT COLLATE = 'utf8mb4_general_ci' COMMENT = 'user table';