Dmitry Lychagin created ASTERIXDB-2934:
------------------------------------------
Summary: 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
Fix For: 0.9.7
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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