Denys Ordynskiy created DRILL-7342:
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Summary: Drill replacing spaces with underlines in the column
names of text files with headers
Key: DRILL-7342
URL: https://issues.apache.org/jira/browse/DRILL-7342
Project: Apache Drill
Issue Type: Bug
Reporter: Denys Ordynskiy
Drill doesn't allow to query csvh columns with spaces.
*Description:*
Update Drill ctas format option to generate text file with header:
{noformat}
set `store.format` = 'csvh';
{noformat}
Create table with column names having spaces:
{noformat}
create table dfs.tmp.`csv table with spaces` (`Full Name`) as select 'James
Bond' from (values(1));
{noformat}
Drill wrote column name with space:
{noformat}
hadoop fs -cat '/tmp/csv table with spaces/0_0_0.csvh'
{noformat}
|Full Name|
|James Bond|
Try to query this table without column name:
{noformat}
select * from dfs.tmp.`csv table with spaces`;
{noformat}
|{color:#ff0000}*Full_Name*{color}|
|James Bond|
{color:#ff0000}*Drill replaced space with underline.*{color}
Try to select `Full Name` column with space:
{noformat}
select `Full Name` from dfs.tmp.`csv table with spaces`;
{noformat}
Drill
|Full Name|
| |
When I changed space to underline, query returned the data:
{noformat}
select `Full_Name` from dfs.tmp.`csv table with spaces`;
{noformat}
|Full_Name|
|James Bond|
Drill can create csvh text files with spaces in the column names. But it's
impossible to request data using the original column name.
*Expected result*
Space should be available character in the column names.
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