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DECLARE vote_id INT;
    select id from votes where votes.question_id = question_id and vote_type_id = 3 into vote_id;

    if vote_id is null then
      ...do A
    else
      ...do B
    end if;

the condition should be true and execute A part of code but always execute B part.
How to use select with if statement? Thank you very much.

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    Maybe vote_id is never null as per your query? Commented Dec 28, 2011 at 9:35
  • I execute the 'select id...' in mysql and return id Commented Dec 28, 2011 at 9:39

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try select id from votes where votes.question_id = question_id and votes.vote_type_id = 3 into vote_id;

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