[jira] [Commented] (CALCITE-4362) Unable to parse queries that use BigQuery pseudo columns _PARTITIONDATE/_PARTITIONTIME

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

    [ https://issues.apache.org/jira/browse/CALCITE-4362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17223154#comment-17223154 ] 

Julian Hyde commented on CALCITE-4362:
--------------------------------------

The solution is probably to make {{_PARTITIONDATE}} and {{_PARTITIONTIME}} into system columns. Specifically:
 * When you ask a table 'Is {{_PARTITIONDATE}} one of your columns', the table will say 'yes'.
 * When you ask a table 'tell me your columns' (e.g. when expanding '*') it will not mention {{_PARTITIONDATE}}.

Oracle's {{ROWID}} is similar.

> Unable to parse queries that use BigQuery pseudo columns _PARTITIONDATE/_PARTITIONTIME
> --------------------------------------------------------------------------------------
>
>                 Key: CALCITE-4362
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4362
>             Project: Calcite
>          Issue Type: Bug
>          Components: babel
>            Reporter: Justin Swett
>            Priority: Major
>
> BigQuery supports partitioned tables using pseudo columns "_PARTITIONDATE"
> e.g. The following table has two columns you can select from but also partitions the data by creation date
> {code:java}
> CREATE or REPLACE TABLE #{table} (            
>   transaction_id STRING, 
>   order_date DATE )
> PARTITION BY _PARTITIONDATE
> {code}
>  
> The following queries cannot be validated 
> {code:java}
> select * from #{table} where _PARTITIONDATE = '2020-11-03' ;
> -- OR
> select * from #{table} where _PARTITIONTIME = '2020-11-03' ;{code}



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