Question

IN Statement Query

Asked by: Micheal_Male

I have a count query which i am using to determine if the user exist or not. I am having an IN Statement in the query. Unfortunately everytime i run spring throws an error that the column value is greater than 2. If someone can point what i am doing wrong that would be great.

private final static String VALIDATE_USER_SQL = " select count(*) from user_table where id = ? and user in (?) ";
 
public boolean validateUser(final UserModel userModel, final List user) {
 
		if (LOG.isInfoEnabled()) {
			LOG
					.info("inside validateUser()");
		}
 
		Object[] parameters = new Object[] { new Integer(userModel.getUserId(), user };
		int[] paramTypes = { Types.INTEGER, Types.VARCHAR };
		int count = 0;
		try {
 
			count = getJdbcTemplate().queryForInt(VALIDATE_USER_SQL,
					parameters, paramTypes);
 
			if (count > 0) {
 
				if (LOG.isDebugEnabled()) {
					LOG.debug("Count is [ " + count + " ]");
				}
 
				return true;
			}
 
		}
 
		catch (final DataAccessException ex) {
 
			if (LOG.isErrorEnabled()) {
				LOG.error("DataAccessException [ " + ex.getMessage() + " ]");
			}
		}
 
		return false;
	}

                                  
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Asked On
2009-07-04 at 10:49:32ID24544047
Tags

java

Topic

Java Programming Language

Participating Experts
3
Points
250
Comments
12

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Answers

 

by: CEHJPosted on 2009-07-04 at 10:52:41ID: 24777487

You can't parameterize (use bind variables in) a set unfortunately

 

by: mrjoltcolaPosted on 2009-07-04 at 10:59:35ID: 24777508

You did not say which database; if you are using Oracle you can pass Java collections in as bind variables.  You cannot use a direct IN(:var) but you can pass it as a collection and cast it.

http://knol.google.com/k/franck-pachot/oracle-passing-a-list-as-bind-variable/17uabcrki6uux/2#

 

by: angelIIIPosted on 2009-07-04 at 11:00:16ID: 24777510

I agree.
however, if you have for example sql server, you could implement a function like I did (search for dbo.ParmsToList), and change the query like this:

private final static String VALIDATE_USER_SQL = " select count(*) from user_table where id = ? and user in ( select value from dbo.ParmsTolist(?, ',') ) ";

                                              
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by: CEHJPosted on 2009-07-04 at 11:05:06ID: 24777529

Otherwise, if you can't use that or don't want to narrow the portability of your code, just concatenate the List as part of the sql string and use the other parameter as the only bind variable. Although i must say i'm a little surprised that 'getUserId' can have any relevance to more than one user ...

 

by: Micheal_MalePosted on 2009-07-04 at 11:07:45ID: 24777538

I am suing postgres DB

 

by: CEHJPosted on 2009-07-04 at 11:11:50ID: 24777555

>>I am suing postgres DB

What, for not allowing you to use a List as a bin variable..? ;-)

 

by: CEHJPosted on 2009-07-04 at 11:12:13ID: 24777557

(bind variable)

 

by: Micheal_MalePosted on 2009-07-04 at 11:16:02ID: 24777567

LOL i am sorry i meant using heheh. I will search on bind variable and will implement the solution to see if it works. Will update.

 

by: Micheal_MalePosted on 2009-07-04 at 11:17:57ID: 24777576

Or i can use a loop to see what the user list size is and pass the id and the user in a loop. If count is > 0 then break and return true. But i was trying to find an efficient way like Bind variables. Let me see if i can implement it.

 

by: mrjoltcolaPosted on 2009-07-04 at 11:25:58ID: 24777599

>>I am suing postgres DB

LOL, thanks for the laugh... :)

 

by: angelIIIPosted on 2009-07-04 at 11:30:56ID: 24777623

I am also sure the function I mentioned can be translated into postgreSql ... :)

 

by: Micheal_MalePosted on 2009-07-04 at 11:47:50ID: 24777676

Thanks All. Angel idea is the perfect and easy one. Worked perfect,.

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