[jira] [Updated] (CALCITE-1586) JDBC adapter generates wrong SQL if UNION has more than two inputs

["Julian Hyde (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-1586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde updated CALCITE-1586:
---------------------------------
    Summary: JDBC adapter generates wrong SQL if UNION has more than two inputs  (was: wrong rel-to-sql conversion when performing set operation more then two inputs.)

> JDBC adapter generates wrong SQL if UNION has more than two inputs
> ------------------------------------------------------------------
>
>                 Key: CALCITE-1586
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1586
>             Project: Calcite
>          Issue Type: Bug
>          Components: jdbc-adapter
>    Affects Versions: 1.10.0
>         Environment: NA
>            Reporter: Zhiqiang He
>            Assignee: Julian Hyde
>            Priority: Critical
>             Fix For: 1.12.0
>
>
> in union example, after UnionMergeRule, the union input is convert to three input, and rel to sql convert result is wrong.
> inputsql
>  {code:sql}
>  SELECT *
> FROM (SELECT \"product_id\"
> FROM \"foodmart\".\"product\"
> UNION ALL
> SELECT \"product_id\"
> FROM \"foodmart\".\"sales_fact_1997\")
> UNION ALL
> SELECT \"product_class_id\" AS \"PRODUCT_ID\"
> FROM \"foodmart\".\"product_class\"
>  {code}
> output sql
>  {code:sql}
> SELECT \"product_id\"
> FROM \"foodmart\".\"product\"
> UNION ALL
> SELECT \"product_id\"
> FROM \"foodmart\".\"sales_fact_199
>  {code}
> the lastest union query is lost.



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