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https://issues.apache.org/jira/browse/ASTERIXDB-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dmitry Lychagin resolved ASTERIXDB-2934.
----------------------------------------
Resolution: Fixed
> Query fails with internal error
> --------------------------------
>
> Key: ASTERIXDB-2934
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-2934
> Project: Apache AsterixDB
> Issue Type: Bug
> Components: COMP - Compiler
> Affects Versions: 0.9.6
> Reporter: Dmitry Lychagin
> Assignee: Dmitry Lychagin
> Priority: Major
> Fix For: 0.9.8
>
>
> The following query fails with NullPointerException at compile time.
> {noformat}
> SELECT x, y, COUNT(*) AS cnt
> GROUP BY ROLLUP(x, y);
> {noformat}
> Exception
> {noformat}
> java.lang.NullPointerException: Cannot invoke "java.util.List.size()" because
> "fieldList" is null
> at
> org.apache.asterix.lang.sqlpp.visitor.DeepCopyVisitor.copyFieldList(DeepCopyVisitor.java:560)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.visitor.DeepCopyVisitor.visit(DeepCopyVisitor.java:319)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.visitor.DeepCopyVisitor.visit(DeepCopyVisitor.java:76)
> ~[classes/:?]
> at
> org.apache.asterix.lang.common.clause.GroupbyClause.accept(GroupbyClause.java:109)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.visitor.DeepCopyVisitor.visit(DeepCopyVisitor.java:171)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.visitor.DeepCopyVisitor.visit(DeepCopyVisitor.java:76)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.clause.SelectBlock.accept(SelectBlock.java:55)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.util.SqlppRewriteUtil.deepCopy(SqlppRewriteUtil.java:60)
> ~[classes/:?]
> at
> org.apache.asterix.lang.sqlpp.rewrites.visitor.SqlppGroupingSetsVisitor.rewriteMultipleGroupingSets(SqlppGroupingSetsVisitor.java:338)
> ~[classes/:?]
> {noformat}
> This query has SELECT clause with GROUP BY clause, but without FROM clause.
> This combination should not be allowed. If GROUP BY clause is present then
> FROM clause should be required. If FROM clause is absent then the only
> allowed clauses should be SELECT, LET and WHERE. i.e. SELECT ... LET ...
> WHERE ...
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