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IN Statement Query

Posted on 2009-07-04
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Last Modified: 2012-05-07
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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Question by:Micheal_Male
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Assisted Solution

by:CEHJ
CEHJ earned 25 total points
ID: 24777487
You can't parameterize (use bind variables in) a set unfortunately
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by:mrjoltcola
ID: 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#
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Guy Hengel [angelIII / a3] earned 225 total points
ID: 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:CEHJ
ID: 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 ...
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Author Comment

by:Micheal_Male
ID: 24777538
I am suing postgres DB
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by:CEHJ
ID: 24777555
>>I am suing postgres DB

What, for not allowing you to use a List as a bin variable..? ;-)
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by:CEHJ
ID: 24777557
(bind variable)
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by:Micheal_Male
ID: 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.
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Author Comment

by:Micheal_Male
ID: 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.
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by:mrjoltcola
ID: 24777599
>>I am suing postgres DB

LOL, thanks for the laugh... :)

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by:Guy Hengel [angelIII / a3]
ID: 24777623
I am also sure the function I mentioned can be translated into postgreSql ... :)
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by:Micheal_Male
ID: 24777676
Thanks All. Angel idea is the perfect and easy one. Worked perfect,.
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