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From "Sean Hsuan-Yi Chu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-2054) Support `||` as "concat operator" for varchar inputs
Date Mon, 02 Feb 2015 18:46:36 GMT

     [ https://issues.apache.org/jira/browse/DRILL-2054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Hsuan-Yi Chu updated DRILL-2054:
-------------------------------------
    Description: 
For example, the query:
select n_nationkey || ' + ' || n_name || ' = ' as CONCAT, n_nationkey, ' + ' as PLUS, n_name
from cp.`tpch/nation.parquet`

should print out 
CONCAT	n_nationkey	PLUS	n_name
0 + ALGERIA = 	0	 + 	ALGERIA
1 + ARGENTINA = 	1	 + 	ARGENTINA
2 + BRAZIL = 	2	 + 	BRAZIL
3 + CANADA = 	3	 + 	CANADA
... ... ... (rows/records are omitted due to space limitation)

  was:
`||` can be used as either "logic operator" or "varchar operator"
1. For boolean inputs, it is "OR"
2. For varchar inputs, it is should be "concat" (of strings)


> Support `||` as "concat operator" for varchar inputs
> ----------------------------------------------------
>
>                 Key: DRILL-2054
>                 URL: https://issues.apache.org/jira/browse/DRILL-2054
>             Project: Apache Drill
>          Issue Type: New Feature
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>             Fix For: Future
>
>         Attachments: DRILL-2054.1.patch, DRILL-2054ForOptiq.1.patch
>
>
> For example, the query:
> select n_nationkey || ' + ' || n_name || ' = ' as CONCAT, n_nationkey, ' + ' as PLUS,
n_name from cp.`tpch/nation.parquet`
> should print out 
> CONCAT	n_nationkey	PLUS	n_name
> 0 + ALGERIA = 	0	 + 	ALGERIA
> 1 + ARGENTINA = 	1	 + 	ARGENTINA
> 2 + BRAZIL = 	2	 + 	BRAZIL
> 3 + CANADA = 	3	 + 	CANADA
> ... ... ... (rows/records are omitted due to space limitation)



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