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POExtending Propel to emulate database functions
 

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    <p>I need to translate an application from MySQL to SQL Server.</p> <p>There are many hard-coded queries involving MySQL database functions like <strong>NOW()</strong>, <strong>LCASE()</strong>, <strong>MATCH() AGAINST()</strong>, that has equivalent in SQL Server, but with a different syntax and structure.</p> <p>I choose <strong>Propel</strong> because it seems to be easy-to-use.</p> <p>I'm looking for a way to emulate database functions like <strong>NOW()</strong> <em>{MySQL}</em> and <strong>GETDATE()</strong> <em>{SQL Server}</em> by extending Propel classes.</p> <p>I think something like this:</p> <pre><code>$result = Function::NOW(); // MySQL $result = Function::GETDATE(); // SQL Server </code></pre> <p>When the function accepts parameters, like <strong>LCASE()</strong> <em>{MySQL}</em> or <strong>LOWER()</strong> <em>{SQL Server}</em>, it could be like this:</p> <pre><code>$table = new MyTable(); $result = Function::LCASE($table-&gt;getName()); // MySQL $result = Function::LOWER($table-&gt;getName()); // SQL Server </code></pre> <p>or</p> <pre><code>$table = new MyTable(); $result = Function::MD5($table-&gt;getPassword()); // MySQL $result = Function::HASHBYTES('MD5', $table-&gt;getPassword()); // SQL Server </code></pre> <p>The perfect solution would be if I can create equivalence between two functions with the same purpose from different databases (MySQL and SQL Server).</p> <p>So, instead of using <strong>Function::HASHBYTES()</strong> in my PHP code, I could always use <strong>Function::MD5()</strong>, because it is more simple, and when my application is connected to a SQL Server Database, internally, <em>HASHBYTES()</em> is invoked.</p>
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    1. COSo you need someting to abstract database function using Propel. But, is it not the role of Propel? What you want is add extract feature to [this class](https://github.com/propelorm/Propel/blob/master/runtime/lib/adapter/DBMSSQL.php)?
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    2. COI don't see a question here... what is it? Sounds like you have a plan (although I'm not exactly sure why you need the `Function::ETCETC()` pieces at all versus using PHP functions.
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    3. COThere is no class named "Function" in Propel, it is only an example what I think could be useful. I guess Propel does not abstract database functions, if you need them, you pass inside single quotes 'COUNT(fieldname)', like plain queries. Applications are commonly complex, if you need more sophisticated queries, even with Propel, you are required to use hard-coded pieces of queries.
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