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https://issues.apache.org/jira/browse/DRILL-4374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15158949#comment-15158949
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Taras Supyk commented on DRILL-4374:
------------------------------------
I've tried different jdbc drive and reproduced this bug. So now I have these
versions:
drill 1.4
postgresql 9.3.11
jdbc-driver postgresql-9.4-1205.jdbc41.jar
And this query:
create sequence user_ids;
create sequence group_ids;
create sequence book_ids;
create table users (id integer primary key default nextval('user_ids'), login
char(64), password char(64), group_id integer, book_id integer);
create table groups (id integer primary key default nextval('group_ids'), name
char(64));
create table books (id integer primary key default nextval('book_ids'), name
char(64));
select u.id from psql.drill.users u
join psql.drill.groups g on g.id = u.group_id
join psql.drill.books b on b.id = u.book_id
group by g.id, u.id;
And all this returns me DATA_READ ERROR: The JDBC storage plugin failed while
trying setup the SQL query.
> Drill rewrites Postgres query with ambiguous column references
> --------------------------------------------------------------
>
> Key: DRILL-4374
> URL: https://issues.apache.org/jira/browse/DRILL-4374
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.4.0
> Reporter: Justin Bradford
> Assignee: Taras Supyk
>
> Drill drops table references when rewriting this query, resulting in
> ambiguous column references.
> This query:
> {code:sql}
> select s.uuid as site_uuid, psc.partner_id,
> sum(psc.net_revenue_dollars) as revenue
> from app.public.partner_site_clicks psc
> join app.public.sites s on psc.site_id = s.id
> join app.public.partner_click_days pcd on pcd.id = psc.partner_click_day_id
> where s.generate_revenue_report is true and pcd.`day` = '2016-02-07'
> group by s.uuid, psc.partner_id;
> {code}
> Results in this error:
> {quote}
> DATA_READ ERROR: The JDBC storage plugin failed while trying setup the SQL
> query.
> {quote}
> Trying to run this re-written query:
> {code:sql}
> SELECT "site_uuid", "partner_id", SUM("net_revenue_dollars") AS "revenue"
> FROM (
> SELECT "uuid" AS "site_uuid", "partner_id", "net_revenue_dollars"
> FROM "public"."partner_site_clicks"
> INNER JOIN "public"."sites" ON "partner_site_clicks"."site_id" =
> "sites"."id"
> INNER JOIN "public"."partner_click_days" ON
> "partner_site_clicks"."partner_click_day_id" = "partner_click_days"."id"
> WHERE "sites"."generate_revenue_report" IS TRUE AND
> "partner_click_days"."day" = '2016-02-07'
> ) AS "t0" GROUP BY "site_uuid", "partner_id"
> {code}
> That query fails due to an ambiguous "partner_id" reference as two of the
> tables have that column.
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