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

Description

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;
}

Environment

MySQL Datasource, Hibernate 3.2.4.sp1

Status

Assignee

Strong Liu

Reporter

Benjamin Gniza

Fix versions

Labels

None

backPortable

None

Suitable for new contributors

None

Requires Release Note

None

Pull Request

None

backportDecision

None

Affects versions

3.2.4.sp1

Priority

Minor