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POHow to put a literal "?" in a Mysql query with bind variables
 

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  1. POHow to put a literal "?" in a Mysql query with bind variables
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    <p>I have the following query:</p> <pre><code>select subclasses.id,participants_subclasses.participant_id from subclasses left outer join participants_subclasses on participants_subclasses.participant_id = ? and subclasses.id = participants_subclasses.subclass_id where subclasses.classification_id = ? and subclasses.showhover order by subclasses.seq, IF(LEFT(subclasses.code, 1) = '&lt;', Extractvalue(subclasses.code, "//texts/text/content"), subclasses.code) </code></pre> <p>The above query is processing a table where the code column sometimes has text and sometimes has XML with text inside a tag. The above query works. The side-effect is that a code value cannot start with a "&lt;" which should be acceptable, but the order by would mistake it for XML content. The query below would be more specific and accurate:</p> <pre><code>select subclasses.id,participants_subclasses.participant_id from subclasses left outer join participants_subclasses on participants_subclasses.participant_id = ? and subclasses.id = participants_subclasses.subclass_id where subclasses.classification_id = ? and subclasses.showhover order by subclasses.seq, IF(LEFT(subclasses.code, 5) = '&lt;?xml', Extractvalue(subclasses.code, "//texts/text/content"), subclasses.code) </code></pre> <p>However this variation checking the XML header in the content fails with a "NameInput Array does not match ?" error in MySQL. It appears that the ? inside <code>&lt;?xml</code> literal is being mistaken for a bind target. And I am passing 2 values to be bound - which again is correct. </p> <p>So my question is - how do I get the <code>&lt;?xml</code> literal to not be mistaken for a bind value target???</p>
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    1. USTJChambers
    1. USTJChambers
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    1. COHave you tried escaping the question mark with backslash?
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      1. POHow to put a literal "?" in a Mysql query with bind variables
      1. USdeadly
    2. COYes I tried `<\?xml` and still got the above error.
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      1. USTJChambers
    3. COQuestion marks inside quotes should not be interpreted as placeholders. What language are you working in and how are you preparing the statement?
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      1. POHow to put a literal "?" in a Mysql query with bind variables
      1. USJim Garrison
 

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