O Guia Definitivo do Yii 1.1

different in different DBMS, the abstract data types are independent of DBMS. When
abstract data types are used in defining table columns, the query builder will convert them
into the corresponding physical data types.
The following abstract data types are supported by the query builder.
• pk: a generic primary key type, will be converted into int(11) NOT NULL
AUTO_INCREMENT PRIMARY KEY for MySQL;
• string: string type, will be converted into varchar(255) for MySQL;
• text: text type (long string), will be converted into text for MySQL;
• integer: integer type, will be converted into int(11) for MySQL;
• float: floating number type, will be converted into float for MySQL;
• decimal: decimal number type, will be converted into decimal for MySQL;
• datetime: datetime type, will be converted into datetime for MySQL;
• timestamp: timestamp type, will be converted into timestamp for MySQL;
• time: time type, will be converted into time for MySQL;
• date: date type, will be converted into date for MySQL;
• binary: binary data type, will be converted into blob for MySQL;
• boolean: boolean type, will be converted into tinyint(1) for MySQL.
createTable
function createTable($table, $columns, $options=null)
The createTable method builds and executes a SQL statement for creating a table. The
$table parameter specifies the name of the table to be created. The $columns parameter
specifies the columns in the new table. They must be given as name-definition pairs (e.g.
'username'=>'string'). The $options parameter specifies any extra SQL fragment that
should be appended to the generated SQL. The query builder will quote the table name as
well as the column names properly.
When specifying a column definition, one can use an abstract data type as described
above. The query builder will convert the abstract data type into the corresponding
physical data type, according to the currently used DBMS. For example, string will be
converted into varchar(255) for MySQL.
A column definition can also contain non-abstract data type or specifications. They will be
put in the generated SQL without any change. For example, point is not an abstract data
type, and if used in a column definition, it will appear as is in the resulting SQL; and string
NOT NULL will be converted into varchar(255) NOT NULL (i.e., only the abstract type
string is converted).
Below is an example showing how to create a table: