Struct Column 

pub struct Column<'a> { /* private fields */ }

数据库表中列的元数据字段模型

Implementations

impl<'a> Column<'a>

pub fn new(name: &'a str, type_name: &'a str, not_null: bool) -> Self

创建实例

pub fn set_default_value(&mut self, default_value: &'a str)

设置默认值.

pub fn set_index_type(&mut self, index_type: &'a str)

设置索引类型.

pub fn set_reference(&mut self, reference: Reference<'a>)

设置外键引用.

pub fn name(&self) -> &'a str

返回列字段名称.

pub fn type_name(&self) -> &'a str

返回列字段类型.

pub fn is_not_null(&self) -> bool

返回字段值是否允许为null.

pub fn default_value(&self) -> Option<&'a str>

返回列字段的默认值.

pub fn index_type(&self) -> Option<&'a str>

返回字段的索引类型.

pub fn reference(&self) -> Option<&'a str>

返回列字段的引用 reference.

pub fn auto_increment(&self) -> bool

如果列字段的默认值为 auto_increment,那么就返回 true

pub fn schema(&self) -> Schema

根据列的字段类型，返回 Apache Avro Scheme.

pub fn record_filed(&self) -> RecordField

根据 Apache Avro Schema 返回 Avro Schema 字段类型 RecordField

Trait Implementations

impl<'a> Clone for Column<'a>

fn clone(&self) -> Column<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for Column<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Serialize for Column<'a>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.