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Posted to dev@drill.apache.org by "Arina Ielchiieva (JIRA)" <ji...@apache.org> on 2018/07/02 16:39:00 UTC
[jira] [Created] (DRILL-6575) Add store.hive.conf.properties option
to allow set Hive properties at session level
Arina Ielchiieva created DRILL-6575:
---------------------------------------
Summary: Add store.hive.conf.properties option to allow set Hive properties at session level
Key: DRILL-6575
URL: https://issues.apache.org/jira/browse/DRILL-6575
Project: Apache Drill
Issue Type: Improvement
Affects Versions: 1.13.0
Reporter: Arina Ielchiieva
Assignee: Arina Ielchiieva
Fix For: 1.14.0
*Use case*
Hive external table ddl:
{noformat}
create external table my(key int, val string)
row format delimited
fields terminated by ','
stored as textfile
location '/data/my_tbl';
{noformat}
Path {{/data/my_tb}} contains sub directory and file in it: {{/data/my_tbl/sub_dir/data.txt}} with the following data:
{noformat}
1, value_1
2, value_2
{noformat}
When querying such table from Hive, user gets the following exception:
{noformat}
Failed with exception java.io.IOException:java.io.IOException: Not a file: file:///data/my_tbl/sub_dir
{noformat}
To be able to query this table user needs to set two properties to true: {{hive.mapred.supports.subdirectories}} and {{mapred.input.dir.recursive}}.
They can be set at system level in hive-site.xml or at session in Hive console:
{noformat}
set hive.mapred.supports.subdirectories=true;
set mapred.input.dir.recursive=true;
{noformat}
Currently to be able to query such table from Drill, user can specify this properties in Hive plugin only:
{noformat}
{
"type": "hive",
"configProps": {
"hive.metastore.uris": "thrift://localhost:9083",
"hive.metastore.sasl.enabled": "false",
"hbase.zookeeper.quorum": "localhost",
"hbase.zookeeper.property.clientPort": "5181",
"hive.mapred.supports.subdirectories": "true",
"mapred.input.dir.recursive": "true"
}
"enabled": true
}
{noformat}
*Jira scope*
This Jira aims to add new session option to Drill {{store.hive.conf.properties}} which will allow user to specify hive properties at session level.
User should write properties in string delimiter by new line symbol. Properties values should NOT be set in double-quotes or any other quotes otherwise they would be parsed incorrectly. Key and value should be separated by {{=}}. Each `alter session set` will override previously set properties at session level. If during query Drill couldn't unparse property string, warning will be logged. Properties will be parsed by loading into {{java.util.Properties}}.
Example:
{noformat}
alter session set `store.hive.conf.properties` = 'hive.mapred.supports.subdirectories=true\nmapred.input.dir.recursive=true'";
{noformat}
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