Php 什么是Varien_Db_Ddl_表：：在mysql/magento中键入_文本

我在magento mysql安装或升级脚本中看到，他们使用以下方式添加列：

$installer->getTable('catalog/eav_attribute'),
    'tooltip',
    array(
        'type'      => Varien_Db_Ddl_Table::TYPE_TEXT,
        'nullable'  => true,
        'comment'   => 'Tooltip'
    )

---

我想知道什么是Varien_Db_Ddl_Table:：TYPE_TEXT？如果我想在mysql表中手动添加工具提示列，那么在类型部分应该使用什么？它只是“TEXT”？

Varien\u Db\u Ddl\u表：：TYPE\u TEXT

只不过是列的类型，就像

char、varchar、int、tinyint等一样。

您可以使用任何人输入以下内容

const TYPE_BOOLEAN          = 'boolean';
const TYPE_SMALLINT         = 'smallint';
const TYPE_INTEGER          = 'integer';
const TYPE_BIGINT           = 'bigint';
const TYPE_FLOAT            = 'float';
const TYPE_NUMERIC          = 'numeric';
const TYPE_DECIMAL          = 'decimal';
const TYPE_DATE             = 'date';
const TYPE_TIMESTAMP        = 'timestamp'; // Capable to support date-time from 1970 + auto-triggers in some RDBMS
const TYPE_DATETIME         = 'datetime'; // Capable to support long date-time before 1970
const TYPE_TEXT             = 'text';
const TYPE_BLOB             = 'blob'; // Used for back compatibility, when query param can't use statement options
const TYPE_VARBINARY        = 'varbinary'; // A real blob, stored as binary inside DB

// Deprecated column types, support is left only in MySQL adapter.
const TYPE_TINYINT          = 'tinyint';        // Internally converted to TYPE_SMALLINT
const TYPE_CHAR             = 'char';           // Internally converted to TYPE_TEXT
const TYPE_VARCHAR          = 'varchar';        // Internally converted to TYPE_TEXT
const TYPE_LONGVARCHAR      = 'longvarchar';    // Internally converted to TYPE_TEXT
const TYPE_CLOB             = 'cblob';          // Internally converted to TYPE_TEXT
const TYPE_DOUBLE           = 'double';         // Internally converted to TYPE_FLOAT
const TYPE_REAL             = 'real';           // Internally converted to TYPE_FLOAT
const TYPE_TIME             = 'time';           // Internally converted to TYPE_TIMESTAMP
const TYPE_BINARY           = 'binary';         // Internally converted to TYPE_BLOB
const TYPE_LONGVARBINARY    = 'longvarbinary';  // Internally converted to TYPE_BLOB

---

为了获得更多信息，请参考

lib\Varien\Db\Ddl\Table.php

我在magento 2中也有同样的疑问，后来我在\vendor\magento\framework\Db\Ddl\Table.php中找到了Table.php中的声明

longtext

和

mediumtext

类型呢？