Function validate_drop_graph_statement

graphlite/src/ast/validator.rs:2742–2780

Validate DROP GRAPH statement

(
    drop_graph: &DropGraphStatement,
    errors: &mut Vec<ValidationError>,
)

/// Validate DROP GRAPH statement
fn validate_drop_graph_statement(
    drop_graph: &DropGraphStatement,
    errors: &mut Vec<ValidationError>,
) {
    // Validate graph name is not empty
    if drop_graph.graph_path.segments.is_empty()
        || drop_graph
            .graph_path
            .segments
            .iter()
            .any(|s| s.trim().is_empty())
    {
        errors.push(ValidationError {
            message: "Invalid graph name".to_string(),
            location: Some(drop_graph.location.clone()),
            error_type: ValidationErrorType::Syntax,
        });
        return;
    }

    // Validate path structure
    match drop_graph.graph_path.segments.len() {
        1 => {
            // Single segment: warn that this requires session schema
            // This is informational since executor will handle the actual validation
            // with proper session context
        }
        2 => {
            // Full path: schema/graph - valid
        }
        _ => {
            errors.push(ValidationError {
                message: "Invalid graph path: must be either 'graph_name' (when schema is set) or '/schema_name/graph_name'".to_string(),
                location: Some(drop_graph.location.clone()),
                error_type: ValidationErrorType::Syntax,
            });
        }
    }
}