Method evaluate_simple_case

graphlite/src/exec/executor.rs:4827–4852

Evaluate a simple CASE expression (CASE expr WHEN value1 THEN result1 ...)

(
        &self,
        simple_case: &SimpleCaseExpression,
        context: &ExecutionContext,
    )

    /// Evaluate a simple CASE expression (CASE expr WHEN value1 THEN result1 ...)
    fn evaluate_simple_case(
        &self,
        simple_case: &SimpleCaseExpression,
        context: &ExecutionContext,
    ) -> Result<Value, ExecutionError> {
        // Evaluate the test expression
        let test_value = self.evaluate_expression(&simple_case.test_expression, context)?;

        // Check each WHEN branch
        for when_branch in &simple_case.when_branches {
            for when_value_expr in &when_branch.when_values {
                let when_value = self.evaluate_expression(when_value_expr, context)?;

                // Check if test_value equals when_value
                if self.values_equal(&test_value, &when_value)? {
                    return self.evaluate_expression(&when_branch.then_expression, context);
                }
            }
        }

        // If no WHEN matched, evaluate ELSE or return NULL
        match &simple_case.else_expression {
            Some(else_expr) => self.evaluate_expression(else_expr, context),
            None => Ok(Value::Null),
        }
    }

    /// Evaluate a searched CASE expression (CASE WHEN condition1 THEN result1 ...)
    fn evaluate_searched_case(