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https://issues.apache.org/jira/browse/TORQUE-322?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Fox reassigned TORQUE-322:
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Assignee: Thomas Fox
> Support for SQL Set Operations (UNION, INTERSECT, ...)
> ------------------------------------------------------
>
> Key: TORQUE-322
> URL: https://issues.apache.org/jira/browse/TORQUE-322
> Project: Torque
> Issue Type: New Feature
> Affects Versions: 4.0
> Reporter: Michael Wa
> Assignee: Thomas Fox
>
> * It would be nice to support sql constructs like:
> SELECT * FROM sales2005 UNION SELECT * FROM sales2006;
> * If you want to realize the UNION operator you have to do something like
> that:
> [...]
> Criteria criteriaA = new Criteria();
> criteriaA.where( ... );
> criteriaA.addSelectColumn(COLUMNX);
> Query queryA = SqlBuilder.buildQuery(criteriaA);
> String sqlA = queryA.toString();
> List<Object> replacementsA = queryA.getPreparedStatementReplacements();
> Criteria criteriaB = new Criteria();
> criteriaB.where( ... );
> criteriaB.addSelectColumn(...);
> Query queryB = SqlBuilder.buildQuery(criteriaB);
> String sqlB = queryB.toString();
> List<Object> replacementsB = queryB.getPreparedStatementReplacements();
> List<Object> replacements = Lists.newArrayList();
> replacements.addAll(replacementsA);
> replacements.addAll(replacementsB);
> String sql = COLUMNX + " IN (" + sqlA + " UNION " + sqlB + ")";
> mainCriteria.whereVerbatimSql(sql, replacements.toArray());
> [...]
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