JPQL select express support alias
---------------------------------
Key: OPENJPA-690
URL: https://issues.apache.org/jira/browse/OPENJPA-690
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 1.1.0
Reporter: wilesun
Fix For: 1.1.1
I hope the JPQL supprt the templete:(it can work with hibernate jpa)
select o.id, o.name as aName, o.code aCode form A o where ..
I modifid the jpql.jtt
1.jpql.jtt
void select_expression() #SELECTEXPRESSION : { }
{
((aggregate_select_expression()
| LOOKAHEAD(path()) path()
| identification_variable()
| (<OBJECT> "(" identification_variable() ")")
| constructor_expression()
| select_extension()
| string_literal()
| numeric_literal()) [LOOKAHEAD(1)<AS>]
[LOOKAHEAD(identification_variable())identification_variable()])
}
2:openjpa-kernel\src\main\java\org\apache\openjpa\kernel\jpql\JPQLExpressionBuilder.java
private Expression assignProjections(JPQLNode parametersNode,
QueryExpressions exps) {
int count = parametersNode.getChildCount();
exps.projections = new Value[count];
exps.projectionClauses = new String[count];
exps.projectionAliases = new String[count];
Expression exp = null;
for (int i = 0; i < count; i++) {
JPQLNode parent = parametersNode.getChild(i);
JPQLNode projNode = firstChild(parent);
JPQLNode aliasNode = parent.children.length > 1 ? right(parent) :
null;;
Value proj = getValue(projNode);
String alias = aliasNode == null ? lastChild(projNode).text :
aliasNode.text;
exps.projections[i] = proj;
exps.projectionClauses[i] = assemble(projNode);
exps.projectionAliases[i] = alias;
}
return exp;
}
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