package xsql

import "fmt"

// Validate validate select statement without context.
// This is the pre-validation. In planner, there will be a more comprehensive validation after binding
func Validate(stmt *SelectStatement) error {
	if HasAggFuncs(stmt.Condition) {
		return fmt.Errorf("Not allowed to call aggregate functions in WHERE clause.")
	}

	for _, d := range stmt.Dimensions {
		if HasAggFuncs(d.Expr) {
			return fmt.Errorf("Not allowed to call aggregate functions in GROUP BY clause.")
		}
	}
	return nil
}