问题描述
我正在尝试将带有管道分隔符的 csv 加载到配置单元外部表。数据值包含单引号、双引号、括号等。使用 Open CSV 2.3 版
测试文件.csv
id|name|phone
1|Rahul|123
2|Kumar's|456
3|Neetu"s|789
4|ravi [Roma]|234
表创建为 -
drop table test_schema.hive_test;
CREATE EXTERNAL TABLE test_schema.hive_test (id string,name string,phone string)
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.OpenCSVSerde' WITH SERDEPROPERTIES
(
'separatorChar' = '|','quoteChar' = '[\'\"]','escapeChar' = '\\'
)
LOCATION '/staging/test/hive'
tblproperties ("skip.header.line.count"="1");
输出 -
+-------------+---------------+----------------+
| hive_test.id|hive_test.name |hive_test.phone |
+-------------+---------------+----------------+
| 1 | Rahul |123 |
| 2 | Kumar's |456 |
| 3 | Neetu"s |789 |
| 4 | NULL |234 |
+---------------+------------------------------+
预期输出 -
+-------------+---------------+----------------+
| hive_test.id|hive_test.name |hive_test.phone |
+-------------+---------------+----------------+
| 1 | Rahul |123 |
| 2 | Kumar's |456 |
| 3 | Neetu"s |789 |
| 4 | ravi [Roma] |234 |
+---------------+------------------------------+
问题是我们在数据中有多个转义序列/引号字符,因此我们需要包括所有这些。
解决方法
使用 LazySimpleSerDe(存储为文本文件):
CREATE EXTERNAL TABLE test_schema.hive_test (id string,name string,phone string)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '|'
ESCAPED BY '\\'
LINES TERMINATED BY '\n'
STORED AS TEXTFILE
LOCATION '/staging/test/hive_test'
tblproperties ("skip.header.line.count"="1");