[DRILL-2760] Quoted strings from CSV file appear in query output in different forms

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 1.2.0
• Component/s: Storage - Text & CSV

Environment

9d92b8e319f2d46e8659d903d355450e15946533

DRILL-2580: Exit early from HashJoinBatch if build side is empty

26.03.2015 @ 16:13:53 EDT 4 node cluster on CentOS

• Assignee: Steven Phillips
• Reporter: Khurram Faraaz
• Created: 10/Apr/15 22:01
• Updated: 02/Sep/15 01:07
• Resolved: 07/Jul/15 01:22

Description

Quoted strings appear in query output in different forms, as shown in the section below.
Quotes should NOT appear in query output. Strings must be stripped of their leading and prevailing quotes. (I am referring to this character - " )

Snippet of data from airports.cv file, first three lines, the first line has header information.

[root@centos-01 airport_CSV_data]# head -3 airports.csv
"id","ident","type","name","latitude_deg","longitude_deg","elevation_ft","continent","iso_country","iso_region","municipality","scheduled_service","gps_code","iata_code","local_code","home_link","wikipedia_link","keywords"
6523,"00A","heliport","Total Rf Heliport",40.07080078125,-74.9336013793945,11,"NA","US","US-PA","Bensalem","no","00A",,"00A",,,
6524,"00AK","small_airport","Lowell Field",59.94919968,-151.695999146,450,"NA","US","US-AK","Anchor Point","no","00AK",,"00AK",,,

case 1) In this case quotes are not escaped, they appear in the output as is.

0: jdbc:drill:> select columns[0] id,columns[1] ident,columns[2] type,columns[3] name,columns[4] latitude_deg,columns[5] longitude_deg,columns[6] elevation_ft,columns[7] continent,columns[8] iso_country,columns[9] iso_region,columns[10] municipality,columns[11] scheduled_service,columns[12] gps_code,columns[13] iata_code, columns[14] local_code,columns[15] home_link,columns[16] wikipedia_link,columns[17] keywords from `airports.csv` limit 3;
+------------+------------+------------+------------+--------------+---------------+--------------+------------+-------------+------------+--------------+-------------------+------------+------------+------------+------------+----------------+------------+
|     id     |   ident    |    type    |    name    | latitude_deg | longitude_deg | elevation_ft | continent  | iso_country | iso_region | municipality | scheduled_service |  gps_code  | iata_code  | local_code | home_link  | wikipedia_link |  keywords  |
+------------+------------+------------+------------+--------------+---------------+--------------+------------+-------------+------------+--------------+-------------------+------------+------------+------------+------------+----------------+------------+
| "id"       | "ident"    | "type"     | "name"     | "latitude_deg" | "longitude_deg" | "elevation_ft" | "continent" | "iso_country" | "iso_region" | "municipality" | "scheduled_service" | "gps_code" | "iata_code" | "local_code" | "home_link" | "wikipedia_link" | "keywords" |
| 6523       | "00A"      | "heliport" | "Total Rf Heliport" | 40.07080078125 | -74.9336013793945 | 11           | "NA"       | "US"        | "US-PA"    | "Bensalem"   | "no"              | "00A"      |            | "00A"      |            |                | null       |
| 6524       | "00AK"     | "small_airport" | "Lowell Field" | 59.94919968  | -151.695999146 | 450          | "NA"       | "US"        | "US-AK"    | "Anchor Point" | "no"              | "00AK"     |            | "00AK"     |            |                | null       |
+------------+------------+------------+------------+--------------+---------------+--------------+------------+-------------+------------+--------------+-------------------+------------+------------+------------+------------+----------------+------------+
3 rows selected (0.155 seconds)

In this case quotes appear in the query output but they are escaped with backslash character in the output.

0: jdbc:drill:> select * from `airports.csv` limit 3;
+------------+
|  columns   |
+------------+
| ["\"id\"","\"ident\"","\"type\"","\"name\"","\"latitude_deg\"","\"longitude_deg\"","\"elevation_ft\"","\"continent\"","\"iso_country\"","\"iso_region\"","\"municipality\"","\"scheduled_service\"","\"gps_code\"","\"iata_code\"","\"local_code\"","\"home_link\"","\"wikipedia_link\"","\"keywords\""] |
| ["6523","\"00A\"","\"heliport\"","\"Total Rf Heliport\"","40.07080078125","-74.9336013793945","11","\"NA\"","\"US\"","\"US-PA\"","\"Bensalem\"","\"no\"","\"00A\"","","\"00A\"","",""] |
| ["6524","\"00AK\"","\"small_airport\"","\"Lowell Field\"","59.94919968","-151.695999146","450","\"NA\"","\"US\"","\"US-AK\"","\"Anchor Point\"","\"no\"","\"00AK\"","","\"00AK\"","",""] |
+------------+
3 rows selected (0.097 seconds)