Hibernate version: 3.1.2

I'm trying to find a way to generate the following query using Criteria or HQL:

SELECT count(distinct col1, col2) FROM ...

I get the parsing exception below when I try this in HQL. It appears that only one column is allowed in the distinct. So you are not allowed to specify multiple columns or concatenations of columns. Can anyone confirm this?

Section 14.6 of the Reference doc covers count-distinct, but just shows this:

count(...), count(distinct ...), count(all...)

I interpreted the "..." to be any expression. I found the 2.x HQL BNF, but it says it's out-of-date for 3.x.

Thanks for the help!

Don

Parse Exception:

org.hibernate.hql.ast.QuerySyntaxException: expecting CLOSE, found ',' near line 1, column 24 [select count(name, startDate) from edu.foo.TestTable]
at org.hibernate.hql.ast.ErrorCounter.throwQueryException(ErrorCounter.java:59)
at org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:244)
at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:155)
at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:109)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:75)
at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:54)
at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:71)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:134)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:113)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1602)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
at $Proxy0.createQuery(Unknown Source)
at edu.stanford.irt.fap.dao.test.TestTest.testHql4(TestTest.java:96)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at edu.stanford.irt.fap.dao.test.TestTest.main(TestTest.java:105)
Caused by: line 1:24: expecting CLOSE, found ','
at antlr.Parser.match(Parser.java:211)
at org.hibernate.hql.antlr.HqlBaseParser.aggregate(HqlBaseParser.java:4385)
at org.hibernate.hql.antlr.HqlBaseParser.identPrimary(HqlBaseParser.java:4036)
at org.hibernate.hql.antlr.HqlBaseParser.primaryExpression(HqlBaseParser.java:861)
at org.hibernate.hql.antlr.HqlBaseParser.atom(HqlBaseParser.java:3422)
at org.hibernate.hql.antlr.HqlBaseParser.unaryExpression(HqlBaseParser.java:3200)
at org.hibernate.hql.antlr.HqlBaseParser.multiplyExpression(HqlBaseParser.java:3082)
at org.hibernate.hql.antlr.HqlBaseParser.additiveExpression(HqlBaseParser.java:2802)
at org.hibernate.hql.antlr.HqlBaseParser.concatenation(HqlBaseParser.java:570)
at org.hibernate.hql.antlr.HqlBaseParser.relationalExpression(HqlBaseParser.java:2586)
at org.hibernate.hql.antlr.HqlBaseParser.equalityExpression(HqlBaseParser.java:2449)
at org.hibernate.hql.antlr.HqlBaseParser.negatedExpression(HqlBaseParser.java:2413)
at org.hibernate.hql.antlr.HqlBaseParser.logicalAndExpression(HqlBaseParser.java:2331)
at org.hibernate.hql.antlr.HqlBaseParser.logicalOrExpression(HqlBaseParser.java:2296)
at org.hibernate.hql.antlr.HqlBaseParser.expression(HqlBaseParser.java:2082)
at org.hibernate.hql.antlr.HqlBaseParser.aliasedExpression(HqlBaseParser.java:2249)
at org.hibernate.hql.antlr.HqlBaseParser.selectedPropertiesList(HqlBaseParser.java:1455)
at org.hibernate.hql.antlr.HqlBaseParser.selectClause(HqlBaseParser.java:1365)
at org.hibernate.hql.antlr.HqlBaseParser.selectFrom(HqlBaseParser.java:1106)
at org.hibernate.hql.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:702)
at org.hibernate.hql.antlr.HqlBaseParser.selectStatement(HqlBaseParser.java:296)
at org.hibernate.hql.antlr.HqlBaseParser.statement(HqlBaseParser.java:159)
at org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:238)
... 32 more