Struct SchemaValidator 

pub struct SchemaValidator { /* private fields */ }

Validates a LogicalPlan against a schema catalogue.

Build the validator with SchemaValidator::new, register tables via SchemaValidator::add_table, then call SchemaValidator::validate.

Example

use oxisql_parse::{parse_one, plan_statement, SchemaValidator};

let mut v = SchemaValidator::new();
v.add_table("users", &["id", "name", "age"]);

let stmt = parse_one("SELECT * FROM users").unwrap();
let plan = plan_statement(&stmt).unwrap();
assert!(v.validate(&plan).is_ok());

Implementations

impl SchemaValidator

pub fn new() -> Self

Create a new, empty SchemaValidator.

pub fn add_table(&mut self, name: &str, columns: &[&str])

Register a table with its column list.

Both name and every element of columns are stored in lower-case so comparisons are case-insensitive.

pub fn validate(&self, plan: &LogicalPlan) -> Result<(), ValidationError>

Validate plan against the registered schema.

Returns Ok(()) when all referenced tables and columns are known.

Errors

Returns the first ValidationError encountered during the tree walk.

Trait Implementations

impl Default for SchemaValidator

fn default() -> Self

Returns the “default value” for a type.