[jira] [Commented] (METAMODEL-133) Support multiple consecutive join statements

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/METAMODEL-133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14551171#comment-14551171 ] 

ASF GitHub Bot commented on METAMODEL-133:
------------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/metamodel/pull/20


> Support multiple consecutive join statements
> --------------------------------------------
>
>                 Key: METAMODEL-133
>                 URL: https://issues.apache.org/jira/browse/METAMODEL-133
>             Project: Apache MetaModel
>          Issue Type: Improvement
>            Reporter: Francisco Javier Cano
>
> JOIN query:
> {code}
> SELECT c.name as category, l.name as language, COUNT(f.film_id) as films
> FROM category c
> INNER JOIN film_category fc ON c.category_id=fc.category_id
> INNER JOIN film f on f.film_id=fc.film_id
> INNER JOIN language l ON f.language_id = l.language_id
> GROUP BY c.name,l.name;
> {code}
> Error:
> {code}
> org.apache.metamodel.query.parser.QueryParserException: Not capable of parsing ON token: fc.category_id INNER JOIN film f on f.film_id=fc.film_id INNER JOIN language l ON f.language_id = l.language_id
> {code}
> I performed some debugging:
> {code}
> FromItemParser.java
> ...
> private SelectItem findSelectItem(String token, FromItem leftSide, FromItem rightSide) {
>         // first look in the original query
>         SelectItemParser selectItemParser = new SelectItemParser(_query, false);
>         SelectItem result = selectItemParser.findSelectItem(token); -> TOKEN: fc.category_id INNER JOIN film f on f.film_id=fc.film_id INNER JOIN language l ON f.language_id = l.language_id
> {code}



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