func newSargEq(expr *expression.Eq) *sargEq {
rv := &sargEq{}
rv.sarg = func(expr2 expression.Expression) (Spans, error) {
if expr.EquivalentTo(expr2) {
return _SELF_SPANS, nil
}
span := &Span{}
if expr.First().EquivalentTo(expr2) {
span.Range.Low = expression.Expressions{expr.Second().Static()}
} else if expr.Second().EquivalentTo(expr2) {
span.Range.Low = expression.Expressions{expr.First().Static()}
}
if len(span.Range.Low) == 0 {
return nil, nil
}
span.Range.High = span.Range.Low
span.Range.Inclusion = datastore.BOTH
return Spans{span}, nil
}
return rv
}
func (this *JSConverter) VisitEq(expr *expression.Eq) (interface{}, error) {
var buf bytes.Buffer
buf.WriteString("(")
buf.WriteString(this.Visit(expr.First()))
buf.WriteString(" == ")
buf.WriteString(this.Visit(expr.Second()))
buf.WriteString(")")
return buf.String(), nil
}
