Struct ColumnInfo 

pub struct ColumnInfo {
    pub name: String,
    pub data_type: u32,
    pub nullable: bool,
    pub precision: Option<u32>,
    pub scale: Option<u32>,
}

Column information 列信息结构体，用于存储数据库列的相关元数据

Fields

name: String

列名称

data_type: u32

数据类型，使用 u32 表示类型标识

nullable: bool

标识该列是否允许为空

precision: Option<u32>

可选字段，表示列的精度，某些数据类型可能没有精度信息

scale: Option<u32>

可选字段，表示列的小数位数，某些数据类型可能没有小数位数信息

Trait Implementations

impl Clone for ColumnInfo

fn clone(&self) -> ColumnInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnInfo

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

Formats the value using the given formatter.

impl PartialEq for ColumnInfo

fn eq(&self, other: &ColumnInfo) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ColumnInfo