[jira] [Created] (CALCITE-4323) View with ORDER BY throws AssertionError during view expansion

["Julian Hyde (Jira)" <ji...@apache.org>]

Julian Hyde created CALCITE-4323:
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             Summary: View with ORDER BY throws AssertionError during view expansion
                 Key: CALCITE-4323
                 URL: https://issues.apache.org/jira/browse/CALCITE-4323
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde


If you have a view that has an ORDER BY clause, and try to execute a query on that view, SqlToRelConverter throws AssertionError during view expansion. For example,
{noformat}
create view v as select * from "EMPLOYEES" order by "deptno";
select * from V;

java.lang.AssertionError
	at org.apache.calcite.sql2rel.SqlToRelConverter.requiredCollation(SqlToRelConverter.java:634)
	at org.apache.calcite.sql2rel.SqlToRelConverter.requiredCollation(SqlToRelConverter.java:629)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:578)
	at org.apache.calcite.prepare.CalcitePrepareImpl$CalcitePreparingStmt.expandView(CalcitePrepareImpl.java:1072)
	at org.apache.calcite.plan.ViewExpanders$1.expandView(ViewExpanders.java:52)
	at org.apache.calcite.schema.impl.ViewTable.expandView(ViewTable.java:127)
	at org.apache.calcite.schema.impl.ViewTable.toRel(ViewTable.java:120)
	at org.apache.calcite.prepare.RelOptTableImpl.toRel(RelOptTableImpl.java:285)
	at org.apache.calcite.sql2rel.SqlToRelConverter.toRel(SqlToRelConverter.java:3605)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertIdentifier(SqlToRelConverter.java:2522)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2160)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2109)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2066)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:662)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:643)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:3458)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:569)
	at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:242)
{noformat}

I suspected that it would be a problem for when the view does not project the sort column(s), but it seems to be a problem even if the columns are projected.



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