if rv.Len() == 0 {
			builder.WriteString(" IN (NULL)")
		} else {
			builder.WriteString(" IN (")
			for i := 0; i < rv.Len(); i++ {
				if i > 0 {
					builder.WriteByte(',')
				}
				builder.AddVar(builder, rv.Index(i).Interface())
			}
			builder.WriteByte(')')
		}
	default:
		if eqNil(eq.Value) {
			builder.WriteString(" IS NULL")
		} else {
			builder.WriteString(" = ")