Julian Hyde created CALCITE-4323:
------------------------------------
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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