Retrieving query from java.sql.PreparedStatement

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I have used java.sql.PreparedStatement in order to execute the setString() method for populating the wildcards. But I wanted to know if I can fetch the final query before I execute the executeQuery() method?

Oct 12, 2018 in Java by misc.edu04
• 1,380 points
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1 answer to this question.

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By using prepared statements, you can't retrieve the query :

  • You have a statement, containing placeholders
    • it is sent to the DB server
    • and prepared there
    • which means the SQL statement is "analyzed", parsed, some data-structure representing it is prepared in the memory
  • And, then, you have bound variables
    • which are sent to the server
    • and the prepared statement is executed -- working on those data

But there is no reconstruction of an actual real SQL query -- neither on the Java-side, nor on the database side. So, there is no way to get the prepared statement's SQL -- as there is no such query. And, if you are using it for debugging purpose you can try following:

  • Output the code of the statement, with the placeholders and the list of data
  • Or "build" some SQL query "by hand
answered Oct 12, 2018 by code.reaper12
• 3,450 points

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