[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2697) Can't use := for variable assignment within a SQL-Statement

[Benjamin Gniza (JIRA)]

Can't use := for variable assignment within a SQL-Statement
-----------------------------------------------------------

                 Key: HHH-2697
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2697
             Project: Hibernate3
          Issue Type: Bug
    Affects Versions: 3.2.4.sp1
         Environment: MySQL Datasource, Hibernate 3.2.4.sp1
            Reporter: Benjamin Gniza
            Priority: Minor


i found a kind of bug in org.hibernate.engine.query.ParameterParser.java:
I have an exotic mysql-statement where I want to use mysql variables.
VERY SIMPLE example:
SET @pos=0;
SELECT @pos:=@pos+1 FROM TABLE;

Steps to reproduce:
Session s = sessionFactory.openSession();
s.createSQLQuery("SET @pos=0").executeUpdate();
SQLQuery qry = s.createSQLQuery("select @pos:=@pos from SomeTable");
List lst = qry.list();

Exception:
org.hibernate.QueryException: Space is not allowed after parameter prefix ':' 'SELECT @pos:=@pos+1 FROM TABLE'
	at org.hibernate.engine.query.ParameterParser.parse(ParameterParser.java:68)
	...
	...

Suggested fix:
ParameterParser Lines 62 to 73:
				if (c == ':' && (indx + 1 >= stringLength || sqlString.charAt(indx + 1) != '=')) {
					// named parameter
					int right = StringHelper.firstIndexOfChar( sqlString, ParserHelper.HQL_SEPARATORS, indx + 1 );
					int chopLocation = right < 0 ? sqlString.length() : right;
					String param = sqlString.substring( indx + 1, chopLocation );
					if ( StringHelper.isEmpty( param ) ) {
						throw new QueryException("Space is not allowed after parameter prefix ':' '"
								+ sqlString + "'");
					}
					recognizer.namedParameter( param, indx );
					indx = chopLocation - 1;
				}


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