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Posted to issues@drill.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/05/04 00:17:00 UTC
[jira] [Commented] (DRILL-7238) Drill does not use DirectScan for
non-existent columns
[ https://issues.apache.org/jira/browse/DRILL-7238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16832951#comment-16832951 ]
ASF GitHub Bot commented on DRILL-7238:
---------------------------------------
dvjyothsna commented on issue #1781: DRILL-7238: Fixed ConvertCountToDirectScan to handle non-existent columns
URL: https://github.com/apache/drill/pull/1781#issuecomment-489275905
@amansinha100 Please review
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> Drill does not use DirectScan for non-existent columns
> ------------------------------------------------------
>
> Key: DRILL-7238
> URL: https://issues.apache.org/jira/browse/DRILL-7238
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Venkata Jyothsna Donapati
> Assignee: Venkata Jyothsna Donapati
> Priority: Major
>
> This query does not use the summary metadata cache file:
> select count(int_nulls_id), count(int_id), count(ss_ticket_number), count(extra) from store_sales_null_blocks_int;
> In this query, extra is a column that does not exist (non-existent column).
> Here is the explain plan:
> {noformat}
> | 00-00 Screen
> 00-01 Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$2=[$2], EXPR$3=[$3])
> 00-02 StreamAgg(group=[{}], EXPR$0=[$SUM0($0)], EXPR$1=[$SUM0($1)], EXPR$2=[$SUM0($2)], EXPR$3=[$SUM0($3)])
> 00-03 UnionExchange
> 01-01 StreamAgg(group=[{}], EXPR$0=[COUNT($0)], EXPR$1=[COUNT($1)], EXPR$2=[COUNT($2)], EXPR$3=[COUNT($3)])
> 01-02 Scan(table=[[dfs, parquet_metadata_cache, store_sales_null_blocks_int]], groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=/drill/testdata/metadata_cache/store_sales_null_blocks_int]], selectionRoot=/drill/testdata/metadata_cache/store_sales_null_blocks_int, numFiles=1, numRowGroups=11, usedMetadataFile=true, cacheFileRoot=/drill/testdata/metadata_cache/store_sales_null_blocks_int, columns=[`int_nulls_id`, `int_id`, `ss_ticket_number`, `extra`]]])
> {noformat}
> This is a regression from Drill 1.15.
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