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POJava regex to remove SQL comments from a string
 

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  1. POJava regex to remove SQL comments from a string
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    <p>Hope someone can help me out with this one !</p> <p>I have a sql file that looks like this:</p> <pre><code>CREATE TABLE IF NOT EXISTS users( id INT UNSIGNED NOT NULL AUTO_INCREMENT, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, PRIMARY KEY (id), CONSTRAINT UNIQUE (firstname,lastname) ) ENGINE=InnoDB ; INSERT IGNORE INTO users (firstname,lastname) VALUES ('x','y'); /* INSERT IGNORE INTO users (firstname,lastname) VALUES ('a','b'); */ </code></pre> <p>I have buit a web application that initializes a mysql database at startup with this function:</p> <pre><code>public static void initDatabase(ConnectionPool pool, File sqlFile){ Connection con = null; Statement st = null; String mySb=null; try{ con = pool.getConnection(); mySb=IOUtils.copyToString(sqlFile); // We use ";" as a delimiter for each request then we are sure to have well formed statements String[] inst = mySb.split(";"); st = con.createStatement(); for(int i = 0; i&lt;inst.length; i++){ // we ensure that there is no spaces before or after the request string // in order not to execute empty statements if(!inst[i].trim().isEmpty()){ st.executeUpdate(inst[i]); } } st.close(); }catch(IOException e){ throw new RuntimeException(e); }catch(SQLException e){ throw new RuntimeException(e); }finally{ SQLUtils.safeClose(st); pool.close(con); } } </code></pre> <p>(This function was found on the web. Author, please forgive me for not citing your name, I lost it !!)</p> <p>It works perfectly as long as there is not SQL comment blocks.</p> <p>The <code>copyToString()</code> function basically does what it says. What I would like now is build a regex that will remove block comments from the string. I only have block comments <code>/* */</code> in the file, no <code>--</code>. </p> <p>What I have tried so far:</p> <pre><code>mySb = mySb.replaceAll("/\\*.*\\*/", ""); </code></pre> <p>Unfortunatly, I'm not very good at regex...</p> <p>I get all the troubles of "The matched string look something like <code>/* comment */ real statement /* another comment*/</code> " and so on...</p>
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