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https://issues.apache.org/jira/browse/CALCITE-5724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17728448#comment-17728448
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Julian Hyde commented on CALCITE-5724:
--------------------------------------
Let's suppose you have
{code}ORDER BY x, '3.14159' DESC NULLS FIRST, z{code}
On every SQL database I know, that is equivalent to
{code}ORDER BY x, z{code}
You can safely discard constant sort keys.
> Generated SQL uses literal values in ORDER BY clauses
> -----------------------------------------------------
>
> Key: CALCITE-5724
> URL: https://issues.apache.org/jira/browse/CALCITE-5724
> Project: Calcite
> Issue Type: Bug
> Reporter: Joey Moore
> Assignee: Joey Moore
> Priority: Major
>
> Current behavior in the SqlImplementor will generate SqlCharStringLiterals in
> ORDER BY fields when there is a Literal value in the SELECT clause. This
> happens in languages with isSortByOrdinal(). This leads to errors in dialects
> in which cannot have literal values in ORDER BY clauses such as BigQuery.
> Proposed fix is to use ordinals in all cases where a literal value is present
> in the SELECT clause.
> Example of current implementation:
> {code:java}
> select 3.14159265 as pi
> from \"product\"
> order by 1;
> {code}
> Will return
> {code:java}
> SELECT 3.14159265 AS \"PI\"
> FROM \"foodmart\".\"product\"
> ORDER BY '3.14159265'{code}
> Proposed implementation will return :
> {code:java}
> SELECT 3.14159265 AS \"PI\"
> FROM \"foodmart\".\"product\"
> ORDER BY 1{code}
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