func (e *Evaluator) compareSubquery(cs *ast.CompareSubqueryExpr) bool {
lv := cs.L.GetValue()
if lv == nil {
cs.SetValue(nil)
return true
}
x, err := e.checkResult(cs, lv, cs.R.GetValue().([]interface{}))
if err != nil {
e.err = errors.Trace(err)
return false
}
cs.SetValue(x)
return true
}
