[jira] [Created] (CALCITE-3440) RelToSqlConverter does not properly alias ambiguous ORDER BY

["Steven Talbot (Jira)" <ji...@apache.org>]

Steven Talbot created CALCITE-3440:
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             Summary: RelToSqlConverter does not properly alias ambiguous ORDER BY
                 Key: CALCITE-3440
                 URL: https://issues.apache.org/jira/browse/CALCITE-3440
             Project: Calcite
          Issue Type: Bug
            Reporter: Steven Talbot


Best illustrated by a test that will fail if you put it in RelToSqlConverterTest

 
{code:java}
@Test public void testSelectQueryWithAmbiguousOrderByClause() {
  String query = "select \"product_id\" as \"p\", \"net_weight\" as \"product_id\"  from \"product\" order by 1";
  final String expected = "SELECT \"product_id\" AS \"p\", \"net_weight\" AS \"product_id\"\n"
          + "FROM \"foodmart\".\"product\"\n"
          + "ORDER BY \"product\".\"product_id\"";
  sql(query).ok(expected);
}{code}
 

Kind of a strange case, but basically you select a column, alias it, and order by it. And then you select something else and alias it as that column. RelToSqlConverter will ORDER BY just the column, unaliased ("product_id"), which, at least on HyperSQL and MySQL where I tested, ends up ordering by the aliased expression ("net_weight" as "product_id") vs the column  (either "product"."product_id" or "p" would work in this case).



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