Venkata Jyothsna Donapati created DRILL-7238:
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Summary: 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
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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