Struct Column 

pub struct Column {
    pub name: String,
    pub index: usize,
    pub type_name: String,
    pub nullable: bool,
    pub max_length: Option<u32>,
    pub precision: Option<u8>,
    pub scale: Option<u8>,
}

Column metadata describing a result set column.

Fields

name: String

Column name.

index: usize

Column index (0-based).

type_name: String

SQL type name (e.g., “INT”, “NVARCHAR”).

nullable: bool

Whether the column allows NULL values.

max_length: Option<u32>

Maximum length for variable-length types.

precision: Option<u8>

Precision for numeric types.

scale: Option<u8>

Scale for numeric types.

Implementations

impl Column

pub fn new( name: impl Into<String>, index: usize, type_name: impl Into<String>, ) -> Self

Create a new column with basic metadata.

pub fn with_nullable(self, nullable: bool) -> Self

Set whether the column is nullable.

pub fn with_max_length(self, max_length: u32) -> Self

Set the maximum length.

pub fn with_precision_scale(self, precision: u8, scale: u8) -> Self

Set precision and scale for numeric types.

pub fn to_type_info(&self) -> TypeInfo

Convert column metadata to TDS TypeInfo for decoding.

Maps type names to TDS type IDs and constructs appropriate TypeInfo.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Column

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

Formats the value using the given formatter.