我在处理 XML Serde 时遇到了同样的问题。经过一番努力,我通过单独使用“加载数据”语句并避免在“CREATE”语句中添加“LOCATION”属性来修复它。
以下是我的 XML 数据。
<record customer_id="0000-JTALA">
<income>200000</income>
<demographics>
<gender>F</gender>
<agecat>1</agecat>
<edcat>1</edcat>
<jobcat>2</jobcat>
<empcat>2</empcat>
<retire>0</retire>
<jobsat>1</jobsat>
<marital>1</marital>
<spousedcat>1</spousedcat>
<residecat>4</residecat>
<homeown>0</homeown>
<hometype>2</hometype>
<addresscat>2</addresscat>
</demographics>
<financial>
<income>18</income>
<creddebt>1.003392</creddebt>
<othdebt>2.740608</othdebt>
<default>0</default>
</financial>
</record>
创建表语句:
CREATE TABLE xml_bank(customer_id STRING, income BIGINT, demographics map<string,string>, financial map<string,string>)
ROW FORMAT SERDE 'com.ibm.spss.hive.serde2.xml.XmlSerDe'
WITH SERDEPROPERTIES (
"column.xpath.customer_id"="/record/@customer_id",
"column.xpath.income"="/record/income/text()",
"column.xpath.demographics"="/record/demographics/*",
"column.xpath.financial"="/record/financial/*"
)
STORED AS
INPUTFORMAT 'com.ibm.spss.hive.serde2.xml.XmlInputFormat'
OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
TBLPROPERTIES (
"xmlinput.start"="<record customer",
"xmlinput.end"="</record>"
);
创建查询结果:
OK
Time taken: 0.925 seconds
hive>
对于上面的创建语句,我使用以下“LOAD DATA”语句将 XML 文件中包含的数据加载到上面创建的表中。
hive> load data local inpath '/home/mahesh/hive_input_datasets/XMLdata/XMLdatafile.xml' overwrite into table xml_bank6;
加载查询结果:
Copying data from file:/home/mahesh/hive_input_datasets/XMLdata/XMLdatafile.xml
Copying file: file:/home/mahesh/hive_input_datasets/XMLdata/XMLdatafile.xml
Loading data to table default.xml_bank6
Table default.xml_bank6 stats: [num_partitions: 0, num_files: 1, num_rows: 0, total_size: 500, raw_data_size: 0]
OK
Time taken: 0.879 seconds
hive>
最后,
选择查询和结果:
hive> select * from xml_bank6;
OK
0000-JTALA 200000 {"empcat":"2","jobcat":"2","residecat":"4","retire":"0","hometype":"2","addresscat":"2","homeown":"0","spousedcat":"1","gender":"F","jobsat":"1","edcat":"1","marital":"1","agecat":"1"} {"default":"0","income":"18","othdebt":"2.740608","creddebt":"1.003392"}
Time taken: 0.149 seconds, Fetched: 1 row(s)
hive>
在上面的查询中我会建议的值"xmlinput.start"
as "<servicestatus id"
, 代替"<servicestatus"
,因为 XML 开始标记位于模式中<servicestatus id="some data">
.我相信这会对您有所帮助。