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https://issues.apache.org/jira/browse/DRILL-1152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jacques Nadeau resolved DRILL-1152.
-----------------------------------
Resolution: Invalid
When Drill is interacting with data of unknown schemas (e.g. JSON), columns
need to be qualified when using a join.
> mondrian query - sql parser error: SqlValidatorException:[ Column 'fullname'
> is ambiguous ]"
> --------------------------------------------------------------------------------------------
>
> Key: DRILL-1152
> URL: https://issues.apache.org/jira/browse/DRILL-1152
> Project: Apache Drill
> Issue Type: Bug
> Components: SQL Parser
> Reporter: Chun Chang
> Priority: Minor
>
> #Mon Jul 14 10:10:52 PDT 2014
> git.commit.id.abbrev=699851b
> The following mondrian query (query12.q) failed sql parser:
> 0: jdbc:drill:schema=dfs> select customer.country as c0,
> customer.state_province as c1, customer.city as c2, customer.customer_id as
> c3, fullname as c4, fullname as c5, customer.gender as c6,
> customer.marital_status as c7, customer.education as c8,
> customer.yearly_income as c9 from customer as customer, sales_fact_1997 as
> sales_fact_1997, time_by_day as time_by_day where sales_fact_1997.customer_id
> = customer.customer_id and sales_fact_1997.time_id = time_by_day.time_id and
> time_by_day.the_year = 1997 group by customer.country,
> customer.state_province, customer.city, customer.customer_id, fullname,
> customer.gender, customer.marital_status, customer.education,
> customer.yearly_income having fullname LIKE '%Jeanne%' order by
> customer.country ASC NULLS LAST, customer.state_province ASC NULLS LAST,
> customer.city ASC NULLS LAST, fullname ASC NULLS LAST;
> Query failed: org.apache.drill.exec.rpc.RpcException: Remote failure while
> running query.[error_id: "18220efe-a9f8-450c-bbf7-4ef1cf873cd0"
> endpoint {
> address: "qa-node120.qa.lab"
> user_port: 31010
> control_port: 31011
> data_port: 31012
> }
> error_type: 0
> message: "Failure while parsing sql. < ValidationException:[
> org.eigenbase.util.EigenbaseContextException: From line 1, column 571 to line
> 1, column 578 ] < EigenbaseContextException:[ From line 1, column 571 to line
> 1, column 578 ] < SqlValidatorException:[ Column 'fullname' is ambiguous ]"
> ]
> Error: exception while executing query (state=,code=0)
> If I qualify the column name 'fullname' as 'customer.fullname', then query
> works.
> The thing is with similar but a bit simplified query that I do not qualify
> the column name, it works fine. Only fails for this particular query. So far,
> I failed to isolate the problem. For example, the following query works
> without qualifying the column name:
> 0: jdbc:drill:schema=dfs> select customer.country as c0, fullname as c4 from
> customer as customer group by customer.country, fullname limit 4;
> +------------+------------+
> | c0 | c4 |
> +------------+------------+
> | [B@6fe52815 | [B@2daab417 |
> | [B@2215696d | [B@2bbc8496 |
> | [B@65a4aa48 | [B@1da7911a |
> | [B@6427512b | [B@5142116b |
> +------------+------------+
> 4 rows selected (0.491 seconds)
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