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can anyone solve this  RSS feed

 
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what is the solution for the following problem..
created a form with textfields as title_of_project, names_of_students and supervisors.
whenever i try adding in any values to the title box..
the tomcat window shows an error.
that..
java.sql.SQLException: [Microsoft][ODBC SQL Server Driver][SQL Server]The name '
mechanical' is not permitted in this context. Only constants, expressions, or va
riables allowed here. Column names are not permitted.
 
author and iconoclast
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Well, looks like you're sending a bad SQL query. I don't think we can help figure out your problem without seeing your database code.
[ December 19, 2003: Message edited by: Ernest Friedman-Hill ]
 
Ranch Hand
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Your SQL query is probably not correct.
You must have entered "mechanical" value for any of the text field title_of_project or names_of_students or supervisors and while making a database operation it is not going in quotes probably !!! try to print your query and operate it using any dB client.
[ December 19, 2003: Message edited by: Varun Khanna ]
 
Marshal
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Moving to the JDBC forum awaiting the SQL code for analysis.
bear
 
jyotsana dang
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following is the code i wrote for inserting values into the database:
<%@ page language="java" import="java.sql.*,java.io.*" %>
<%
Connection con=null;
java.sql.Statement stmt=null;
String level="";
String project_title="";
String student_names="";
String co_supervisor="";
int year=0;
String xy=(String)session.getAttribute("y");
if(xy==null)
xy="jyotsana";
level=request.getParameter("level");

project_title=request.getParameter("project_title");
student_names=request.getParameter("student_names");
co_supervisor=request.getParameter("co_supervisor");

year=Integer.parseInt(request.getParameter("year"));

System.out.println("the value of level is:"+level);
System.out.println("the value of project_title is:"+project_title);
System.out.println("the value of student_names is:"+student_names);
System.out.println("the value of co_supervisor is:"+co_supervisor);
System.out.println("the value of year is:"+year);

try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc dbc:mech_iit");
stmt=con.createStatement();
out.println("insert into project_supervised(user_login,level,project_title,student_names,co_supervisor,year) values('"+xy+"','"+level+"','"+project_title+"',"+student_names+",'"+co_supervisor+"',"+year+")");

int i=stmt.executeUpdate("insert into projects_supervised(user_login,level,project_title,student_names,co_supervisor,year) values('"+xy+"','"+level+"',"+project_title+",'"+student_names+"',"+co_supervisor+","+year+")");
System.out.println("the value of:" +i);
System.out.println("the value of:" +i);
stmt.close();

con.close();
}
catch(Exception e)
{
System.out.println(e);

}

%>

can anyone tell me where does the problem lie
Thanks
 
author & internet detective
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You are missing the single quote before the student_names variable. You may want to consider using prepared statements to avoid this problem. Then you don't have to deal with the quotes.
[ December 20, 2003: Message edited by: Jeanne Boyarsky ]
 
It is sorta covered in the JavaRanch Style Guide.
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