[jbossseam-issues] [JBoss JIRA] Closed: (JBSEAM-1682) query restriction example: in ejbql the use of + operator appears to be wrong

query restriction example: in ejbql the use of + operator appears to be wrong ----------------------------------------------------------------------------- Key: JBSEAM-1682 URL: http://jira.jboss.com/jira/browse/JBSEAM-1682 Project: JBoss Seam Issue Type: Bug Components: Documentation Environment: Seam2.0.0.B1 MySQL5.0.27 Reporter: Wolfgang Schwendt Assigned To: Gavin King Priority: Trivial Fix For: 2.0.0.CR1 The Seam reference manual, chapter "The Seam Application Framework", section "Query Objects", contains an example how one can specify optional restrictions for a query. More precisely, an XML definition of an EntityQuery component named "people" is shown. Two restrictions are defined, and it appears that the use of the + operator in these restrictions is wrong. In these restriction definitions the use of the + operator is intended for string concatenation, but according to JSR 220/EJB Persistence specification V.3.0 Final Release, the + operator is only listed in the category "arithmetic operators". At least when tested with Seam2.0.0B1 and MySQL, these restrictions (with the + operator) don't work as expected. Solution: replace the + operator by the concat() function as follows: <framework:entity-query name="people" ejbql="select p from Person p" order="lastName" max-results="20"> <framework:restrictions> <value>lower(firstName) like lower(concat ( #{examplePerson.firstName} , '%' ))</value> <value>lower(lastName) like lower(concat( #{examplePerson.lastName} + '%' ))</value> </framework:restrictions> </framework:entity-query>