SQL Formatter Web Service

Introduction

SQL code is much easier and faster to read and understand when it is formatted, especially when it is a long and complicated SQL statement you are dealing with, or you have to read other people's code. Writing a decent SQL formatter is not an easy task. In this article, I would like to create an online SQL formatter in C#. This consuming application sends unformatted SQL to the server, which will return the formatted SQL to the application.

Using the Code

A Web service at www.gudusoft.com accepts SQL code and returns formatted SQL. Take a look at the WSDL here. The important part is shown below; it describes the beautifySql method.

<wsdl:operation name="beautifySql">
   <documentation xmlns="http://schemas.xmlsoap.org/wsdl/">
      Beautify the sql
   </documentation>
   <wsdl:input message="tns:beautifySqlSoapIn" />
   <wsdl:output message="tns:beautifySqlSoapOut" />
</wsdl:operation>

Step 1: Build the proxy class

Executing the following ...

C:>wsdl.exe http://www.gudusoft.com/SQLFormatterWebService.wsdl

... results in a C# file, SQLFormatterWebService.cs, that contains a class called SQLFormatterWebService. Examine how the methods of this class correspond to those detailed in the WSDL file, especially the following method:

public string beautifySql(string dbvendor, string sql)
dbvendor: SQL dialect of which database supports MSSQL, Oracle,
          MySQL, and Access currently.
sql:      SQL code needs to be formatted.

Step 2: Compile the proxy class

Next, you have to compile the auto-generated file. The file contains no entry point, and thus has to be built as a library.

C:\>csc /t:library c:\SQLFormatterWebService.cs

This results in a new file, SQLFormatterWebService.dll.

Step 3: Create an ASP.NET application

This application, sqlformatter.aspx, consumes the SQL Formatter Web Service.

<%@Assembly Name="SQLFormatterWebService" %>

<html>
   <head>
      <title>Demo of SQL Formatter Web Service </title>
   </head>

   <body>
    <form RunAt="server">
          <asp:TextBox ID="inputsql" Text="select f1,f2 from t1"
                       TextMode="MultiLine" Rows="10" Columns="60"
                       Wrap="False" RunAt="server"/>
   <br><asp:Button Text=" Format Code " OnClick="onFormat"
                          RunAt="server" />
          <br><asp:TextBox ID="outputsql" TextMode="MultiLine"
                           Rows="10" Columns="60" Wrap="False"
                           RunAt="server"/>

   </form>
   </body>
</html>

<script language="c#" RunAt="server">
   void onFormat (Object sender, EventArgs e)
{
      SQLFormatterWebService sqlformatter =
         new SQLFormatterWebService();
      outputsql.Text =
         sqlformatter.beautifySql("mssql",inputsql.Text);
}
</script>

Step 4: Set up this ASP.NET application on your IIS server

  • 4.1 Put the sqlformatter.aspx under wwwroot, for example.
  • 4.2 Put the SQLFormatterWebService.dll into the bin directory under wwwroot.
  • 4.3 Open your browser and type in http://localhost/sqlformatter.aspx.

Enjoy it!

Points of Interest

This SQL Formatter Web Service can be used widely, especially in the forums of a database-related Web site, where a lot of SQL code will be submitted by users for discussion. It would be nice if this SQL code can be formatted before it's posted to the forum.

For further information, these sites are useful if you are interested in a SQL formatter:



Downloads

Comments

  • Another SQL Formatter online service

    Posted by guidomarcel on 01/31/2007 06:11pm

    Hi, here is another online web servie for an sql formatter: http://www.sqlinform.com Regards GuidoMarcel

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Relying on outside companies to manage your network and server environments for your business and applications to meet the needs and demands of your users can be stressful. This is especially true as many Managed Hosting organizations fail to meet their service level agreements. Read this Forrester total economic impact report and learn what makes INetU different and how they exceed their customers' managed hosting expectations.

  • Employees must exchange sensitive emails with customers and partners. These emails might contain protected health information, protected financial information, or corporate information that should not be made public. Globalscape® Mail Express® allows you to encrypt the emails that it manages so that no one but the sender and recipient--not even the administrator--can view the contents of the email. "Secure the Transfer of Sensitive Emails" is the property of GlobalSCAPE

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date