java - Parameter as Left Hand Side Operator LIKE JPQL -

-

i’m trying execute following query: (using eclipselink 2.5.2, mysql 5.5)

em.createquery("select r region r (:pattern concat(r.pattern, '%'))")             .setparameter("pattern", "eu.fr.pr")             .getresultlist();

(background: i’m trying find super regions of region. super regions of eu.fr.pr eu.fr , eu.)

however throws following exception:

java.lang.illegalargumentexception: have attempted set value of type class java.lang.string parameter pattern expected type of class java.lang.boolean query string

the oracle docs state

a expression determines whether wildcard pattern matches string.

the relevant parts of region class are:

@entity @namedquery(name="region.findall", query="select r region r") public class region implements serializable {     private static final long serialversionuid = 1l;      @id     @generatedvalue(strategy=generationtype.identity)     private int id;      private string pattern;      public region() {     }      public string getpattern() {         return this.pattern;     }      public void setpattern(string pattern) {         this.pattern = pattern;     }  }

here sample data table:

+----+-------------+ | id | pattern     | +----+-------------+ |  3 | eu          | |  5 | eu.fr       | |  6 | eu.fr.al    | | 13 | eu.fr.lu    | | 14 | eu.fr.pr    | | 15 | eu.fr.pr.ba | | 16 | eu.fr.pr.ca | | 17 | eu.fr.pr.pa | | 18 | eu.fr.rh    | | 19 | eu.fr.rh.tv | | 20 | eu.fr.ro    | +----+-------------+

so why should pass boolean?

directly concatenating region query ("select r region r ('" + theregion + "' concat(r.pattern, '%'))") gives expected results not want in production. bug in eclipselink?


Comments

Post a Comment

Popular posts from this blog

python - pip install -U PySide error -

-
does know how avoid following error when running pip install -u pyside per official website instructions here: https://pypi.python.org/pypi/pyside/#installing-pyside-on-a-mac-os-x-system note have done brew install qt successfully. you using pip version 7.0.3, version 7.1.2 available. should consider upgrading via 'pip install --upgrade pip' command. collecting pyside using cached pyside-1.2.4.tar.gz installing collected packages: pyside running setup.py install pyside complete output command /applications/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-build-cpxemt/pyside/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/dy/ttgqhqqx3g9bsbsnqnxsk2z80000gq/t/pip-0r7hri-record/install-record.txt --single-version-externally-managed --compile:
Read more

arrays - C++ error: a brace-enclosed initializer is not allowed here before ‘{’ token -

-
simple question: i'm trying initialize array within c++ class declaration: using namespace std; #include <string> class myclass{ public: string myarray[] = {"a","b","c"}; }; and i'm getting error: error: brace-enclosed initializer not allowed here before ‘{’ token no, without complied c++11 compiler, cannot initialize member array in declaration. have initialize array member in constructor. , don't use open array if know number of elements initialize array.
Read more

cytoscape.js - How to add nodes to Dagre layout with Cytoscape -

-
i trying add nodes dagre graph through cityscape.js. problem nodes not painted. code have: cy.add({ group: "nodes", data: { id:"n0",name:"n0",weight: 75 }, }); $.ajax(url).done(function(jsontree){ var newnodes=[]; for(var i=1;i<6;i++){ //var child = jsontree.result[i]; newnodes.push( { group: "nodes", data: { id: "n"+i, name:"n"+i}}, { group: "edges", data: { id: "e"+i, source: "n0", target: "n"+i } } ); } cy.add(newnodes); any ideas? have used loaded function reload graph not work. not know if have use specific function reload graph. thank in advance. you need add positions new nodes. cytoscape.js docs : it important note positions of newly added nodes must defined when calling cy.add(). nodes can not placed in graph without valid position — otherwise not displayed. yo
Read more