如何将双引号括起来并由制表符分隔的CSV数据加载到HIVE表中?

问题描述

我正在尝试从 csv 文件加载数据，其中的值用双引号 '"' 和制表符分隔 '' 括起来.但是当我尝试将它加载到配置单元时，它不会抛出任何错误并且加载数据时没有任何错误，但我认为所有数据都被加载到单个列中，并且大多数值显示为 NULL.下面是我的创建表语句.

I am trying to load data from a csv file in which the values are enclosed by double quotes '"' and tab separated '' .But when I try to load that into hive its not throwing any error and data is loaded without any error but I think all the data is getting loaded into a single column and most of the values it showing as NULL.below is my create table statement.

CREATE TABLE example
(
organization  STRING,
order BIGINT,
created_on  TIMESTAMP,
issue_date TIMESTAMP,
qty  INT
)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '	' 
ESCAPED BY '"'
STORED AS TEXTFILE;

输入文件示例；-

 "Organization" "Order"  "Created on"   "issue_date"   "qty"
 "GB"   "111223"    "2015/02/06 00:00:00"   "2015/05/15 00:00:00"   "5"
 "UK"   "1110"  "2015/05/06 00:00:00"   "2015/06/1 00:00:00"   "51"

和Load语句将数据推送到hive表中.

and Load statement to push data into hive table.

 LOAD DATA INPATH '/user/example.csv' OVERWRITE INTO TABLE example

可能是什么问题，我如何忽略文件的标题.如果我从 create 语句中删除 ESCAPED BY '"' 它在各自的列中加载，但所有值都用双引号括起来.如何从值中删除双引号并忽略文件的标题?

What could be the issue and how can I ignore header of the file.and if I remove ESCAPED BY '"' from create statement its loading in respective columns but all the values are enclosed by double quotes.How can I remove double quotes from values and ignore header of the file?

推荐答案

您现在可以使用 OpenCSVSerde 允许您定义分隔符并轻松转义周围的双引号:

You can now use OpenCSVSerde which allows you to define the separator character and easily escape surrounding double-quotes :

CREATE EXTERNAL TABLE example (
   organization  STRING,
   order BIGINT,
   created_on  TIMESTAMP,
   issue_date TIMESTAMP,
   qty  INT
)
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.OpenCSVSerde'
WITH SERDEPROPERTIES (
   "separatorChar" = "	",
   "quoteChar"     = """
)  
LOCATION '/your/folder/location/';

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