[Enhancement]Remove redundant expression

[jchrys]

we need to remove redundant expression.

• MysqlResult.RELEASE
• MySqlResult.SUM
• PreparedExecuteMessage.DISPOSE
• e.t.c.

[JohnNiang]

Hi @jchrys , I'm willing to contribute this issue.

But I would like to know the reason why we remove those expressions. IMO, these variables are the same as lambda expression. I'm looking forward to your reply.

[jchrys]

Thank you for your comment and willingness to contribute.
Regarding the issue of removing it, I believed that caching the lambda wouldn't serve a significant purpose and wouldn't necessarily enhance the code's readability.

            return OperatorUtils.discardOnCancel(Flux.fromIterable(buffers))
                .doOnDiscard(ByteBuf.class, RELEASE) // Should lookup RELEASE and RELEASE is used on only one place. :(
                .map(this::consume);

            return OperatorUtils.discardOnCancel(Flux.fromIterable(buffers))
                .doOnDiscard(ByteBuf.class, ByteBuf::release) // no need to lookup if you're familiar with Netty.
                .map(this::consume);