Struct ColumnMetadata 

pub struct ColumnMetadata {
    pub name: String,
    pub data_type: ResolvedType,
    pub not_null: bool,
    pub primary_key: bool,
    pub unique: bool,
    pub default: Option<Expr>,
}

Metadata for a column in a table.

Contains the column name, data type, and constraint information.

Examples

use alopex_sql::catalog::ColumnMetadata;
use alopex_sql::planner::types::ResolvedType;

let column = ColumnMetadata::new("id", ResolvedType::Integer)
    .with_not_null(true)
    .with_primary_key(true);

assert_eq!(column.name, "id");
assert_eq!(column.data_type, ResolvedType::Integer);
assert!(column.not_null);
assert!(column.primary_key);

Fields

name: String

Column name.

data_type: ResolvedType

Column data type (normalized).

not_null: bool

NOT NULL constraint.

primary_key: bool

PRIMARY KEY constraint.

unique: bool

UNIQUE constraint.

default: Option<Expr>

DEFAULT value expression.

Implementations

impl ColumnMetadata

pub fn new(name: impl Into<String>, data_type: ResolvedType) -> Self

Create a new column metadata with the given name and data type.

All constraints default to false, and default is None.

pub fn with_not_null(self, not_null: bool) -> Self

Set the NOT NULL constraint.

pub fn with_primary_key(self, primary_key: bool) -> Self

Set the PRIMARY KEY constraint.

pub fn with_unique(self, unique: bool) -> Self

Set the UNIQUE constraint.

pub fn with_default(self, default: Expr) -> Self

Set the DEFAULT value.

Trait Implementations

impl Clone for ColumnMetadata

fn clone(&self) -> ColumnMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnMetadata

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

Formats the value using the given formatter.