我正试图在pig中使用Hcatalog加载我的配置单元表，为此我写了下面的代码，但我遇到了错误。我正在使用pig -useHCatalog打开我的猪壳
代码：
A = LOAD 'patient_info' USING org.apache.hive.hcatalog.pig.HCatLoader();
错误：
错误hive.ql.metadata.Table-无法从序列号中获取字段：com.ibm.sps.hive.serde2.xml.XmlSerDe java.lang.RuntimeException：MetaException(消息：java.lang.ClassNotFoundException类com.ibm.sps.hive.serde2.xml.XmlSerDe未找到)org.apache.hadop.hive.ql.metadata.Table.getDeserializerFromMetaStore(Table.java:275)在org.apache.hadop.hive.ql.metadata.Table.getDeserializer(Table.java:255)网址：org.apache.hadop.hive.ql.metadata.Table.getCols(Table.java:602)在org.apache.hive.hcatalog.common.HCatUtil.getTableSchemaWithPtnColls(HCatUtil.java:184)在org.apache.hive.hcatalog.pig.HCatLoader.getSchema(HCatLoader.java:216)在org.apache.pig.newplan.logical.rerelational.LOLoad.getSchemaFromMetaData(LOLoad.java:175)在org.apache.pig.newplan.localg.relational.LOLoad.(LOLoad.java:89)在org.apache.pig.parser.LogicalPlanBuilder.buildLoadOp(LogicalPlanBuilder.java：866)在org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerate.java:3568)在org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerate.java:1625)在org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerater.java:1102)在org.apache.piger.parser.LogicalPlanGenerator.语句(LogicalPlanGenerator.java:560)在org.apache.piger.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:421)在org.apache.pig.parser.QueryParserDriver.parse(QueryParserDrive.java:188)网址：org.apache.pigh.PigServer$Graph.parseQuery(PigServer.java：1688)org.apache.pigh.PigServer$Graph.registerQuery(PigServer.java:1635)org.apache.pig.PigServer.registerQuery(PigServer.java:587)org.apache.pig.tools.grunt.GruntParser.processPig(GruntParser.java:1093)在org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:501)在org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198)在org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:173)网址：org.apache.pig.tools.grunt.grunt.run(grunt.java:69)org.apache.pig.Main.run(Main.java:547)org.apache.pig.Main.Main(Main.java:158)位于的sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法)sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)在sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)在java.lang.reflect.Method.ioke(Method.java:606)org.apache.hoop.util.RunJar.run(RunJar.java:221)org.apache.hoop.util.RunJar.main(RunJar.java:136)原因：MetaException(消息：java.lang.ClassNotFoundException类com.ibm.sps.hive.serde2.xml.XmlSerDe未找到)org.apache.hadop.hive.metastore.MetaStoreUtils.getDeserializer(MetaStoreUtils.java:400)
更新：
下面给出了我在蜂箱中存储数据的命令。
add jar /home/cloudera/hivexmlserde-1.0.5.3.jar;
CREATE EXTERNAL TABLE patient_info (
statusCode string,
title string,
startTime string,
endTime string,
frequencyValue string,
frequencyUnits string
)
ROW FORMAT SERDE 'com.ibm.spss.hive.serde2.xml.XmlSerDe'
WITH SERDEPROPERTIES (
"column.xpath.statusCode"="medicationsInfo/entryInfo/statusCode/text()",
"column.xpath.title"="medications/code/code/text()",
"column.xpath.startTime"="medications/xxx/startTime/text()",
"column.xpath.endTime"="medications/xxx/endTime/text()",
"column.xpath.frequencyValue"="medications/xxx/frequencyValue/text()",
"column.xpath.frequencyUnits"="medications/xxx/frequencyUnits/text()",
)
STORED AS
INPUTFORMAT 'com.ibm.spss.hive.serde2.xml.XmlInputFormat'
OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
TBLPROPERTIES (
"xmlinput.start"="<medicationsInfo",
"xmlinput.end"="</medicationsInfo>");
load data inpath '/user/cloudera/xml' into table patient_info ;
样本：
<Document>
<ProductCode>
<code>10160-0</code>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20110729</startTime>
<endTime>20110822</endTime>
<strengthValue>24</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20120130</startTime>
<endTime>20120326</endTime>
<strengthValue>12</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20100412</startTime>
<endTime>20110822</endTime>
<strengthValue>8</strengthValue>
<strengthUnits>d</strengthUnits>
</entryInfo>
</ProductCode>
<ProductCode>
<code>10160-0</code>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20110729</startTime>
<endTime>20110822</endTime>
<strengthValue>24</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20120130</startTime>
<endTime>20120326</endTime>
<strengthValue>12</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20100412</startTime>
<endTime>20110822</endTime>
<strengthValue>8</strengthValue>
<strengthUnits>d</strengthUnits>
</entryInfo>
</ProductCode>
<Medicationsinfo>
<code>10160-0</code>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20110729</startTime>
<endTime>20110822</endTime>
<strengthValue>24</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20120130</startTime>
<endTime>20120326</endTime>
<strengthValue>12</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20100412</startTime>
<endTime>20110822</endTime>
<strengthValue>8</strengthValue>
<strengthUnits>d</strengthUnits>
</entryInfo>
</Medicationsinfo>
<Medicationsinfo>
<code>10160-0</code>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20110729</startTime>
<endTime>20110822</endTime>
<strengthValue>24</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20120130</startTime>
<endTime>20120326</endTime>
<strengthValue>12</strengthValue>
<strengthUnits>h</strengthUnits>
</entryInfo>
<entryInfo>
<statusCode>completed</statusCode>
<startTime>20100412</startTime>
<endTime>20110822</endTime>
<strengthValue>8</strengthValue>
<strengthUnits>d</strengthUnits>
</entryInfo>
</Medicationsinfo>
</Document>
外部表的定义无效。以下是一些选项：
选项1
create external table patient_info
(
code string
,entryInfo string
)
row format serde 'com.ibm.spss.hive.serde2.xml.XmlSerDe'
with serdeproperties
(
"column.xpath.code" = "/Medicationsinfo/code/text()"
,"column.xpath.entryInfo" = "/Medicationsinfo/entryInfo"
)
stored as
inputformat 'com.ibm.spss.hive.serde2.xml.XmlInputFormat'
outputformat 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
location '/user/hive/warehouse/patient_info'
tblproperties
(
"xmlinput.start" = "<Medicationsinfo"
,"xmlinput.end" = "</Medicationsinfo>"
)
;
select * from patient_info
;
+-------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| patient_info.code | patient_info.entryinfo |
+-------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 10160-0 | <string><entryInfo><statusCode>completed</statusCode><startTime>20110729</startTime><endTime>20110822</endTime><strengthValue>24</strengthValue><strengthUnits>h</strengthUnits></entryInfo><entryInfo><statusCode>completed</statusCode><startTime>20120130</startTime><endTime>20120326</endTime><strengthValue>12</strengthValue><strengthUnits>h</strengthUnits></entryInfo><entryInfo><statusCode>completed</statusCode><startTime>20100412</startTime><endTime>20110822</endTime><strengthValue>8</strengthValue><strengthUnits>d</strengthUnits></entryInfo></string> |
+-------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 10160-0 | <string><entryInfo><statusCode>completed</statusCode><startTime>20110729</startTime><endTime>20110822</endTime><strengthValue>24</strengthValue><strengthUnits>h</strengthUnits></entryInfo><entryInfo><statusCode>completed</statusCode><startTime>20120130</startTime><endTime>20120326</endTime><strengthValue>12</strengthValue><strengthUnits>h</strengthUnits></entryInfo><entryInfo><statusCode>completed</statusCode><startTime>20100412</startTime><endTime>20110822</endTime><strengthValue>8</strengthValue><strengthUnits>d</strengthUnits></entryInfo></string> |
+-------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
选项2
create external table patient_info
(
code string
,entryInfo array<map<string,map<string,string>>>
)
row format serde 'com.ibm.spss.hive.serde2.xml.XmlSerDe'
with serdeproperties
(
"column.xpath.code" = "/Medicationsinfo/code/text()"
,"column.xpath.entryInfo" = "/Medicationsinfo/entryInfo"
)
stored as
inputformat 'com.ibm.spss.hive.serde2.xml.XmlInputFormat'
outputformat 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
location '/user/hive/warehouse/patient_info'
tblproperties
(
"xmlinput.start" = "<Medicationsinfo"
,"xmlinput.end" = "</Medicationsinfo>"
)
;
select * from patient_info
;
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| patient_info.code | patient_info.entryinfo |
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 10160-0 | [{"entryInfo":{"statusCode":"completed","startTime":"20110729","strengthUnits":"h","endTime":"20110822","strengthValue":"24"}},{"entryInfo":{"statusCode":"completed","startTime":"20120130","strengthUnits":"h","endTime":"20120326","strengthValue":"12"}},{"entryInfo":{"statusCode":"completed","startTime":"20100412","strengthUnits":"d","endTime":"20110822","strengthValue":"8"}}] |
| 10160-0 | [{"entryInfo":{"statusCode":"completed","startTime":"20110729","strengthUnits":"h","endTime":"20110822","strengthValue":"24"}},{"entryInfo":{"statusCode":"completed","startTime":"20120130","strengthUnits":"h","endTime":"20120326","strengthValue":"12"}},{"entryInfo":{"statusCode":"completed","startTime":"20100412","strengthUnits":"d","endTime":"20110822","strengthValue":"8"}}] |
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
选项3
create external table patient_info
(
code string
,entryInfo array<map<string,struct<statusCode:string,startTime:string,endTime:string,strengthValue:int,strengthUnits:string>>>
)
row format serde 'com.ibm.spss.hive.serde2.xml.XmlSerDe'
with serdeproperties
(
"column.xpath.code" = "/Medicationsinfo/code/text()"
,"column.xpath.entryInfo" = "/Medicationsinfo/entryInfo"
)
stored as
inputformat 'com.ibm.spss.hive.serde2.xml.XmlInputFormat'
outputformat 'org.apache.hadoop.hive.ql.io.IgnoreKeyTextOutputFormat'
location '/user/hive/warehouse/patient_info'
tblproperties
(
"xmlinput.start" = "<Medicationsinfo"
,"xmlinput.end" = "</Medicationsinfo>"
)
;
select * from patient_info
;
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| patient_info.code | patient_info.entryinfo |
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 10160-0 | [{"entryInfo":{"statuscode":"completed","starttime":"20110729","endtime":"20110822","strengthvalue":24,"strengthunits":"h"}},{"entryInfo":{"statuscode":"completed","starttime":"20120130","endtime":"20120326","strengthvalue":12,"strengthunits":"h"}},{"entryInfo":{"statuscode":"completed","starttime":"20100412","endtime":"20110822","strengthvalue":8,"strengthunits":"d"}}] |
| 10160-0 | [{"entryInfo":{"statuscode":"completed","starttime":"20110729","endtime":"20110822","strengthvalue":24,"strengthunits":"h"}},{"entryInfo":{"statuscode":"completed","starttime":"20120130","endtime":"20120326","strengthvalue":12,"strengthunits":"h"}},{"entryInfo":{"statuscode":"completed","starttime":"20100412","endtime":"20110822","strengthvalue":8,"strengthunits":"d"}}] |
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
分解选项3
select pi.code
,ei.i + 1 as i
,ei.entryInfo["entryInfo"].statusCode
,ei.entryInfo["entryInfo"].startTime
,ei.entryInfo["entryInfo"].endTime
,ei.entryInfo["entryInfo"].strengthValue
,ei.entryInfo["entryInfo"].strengthUnits
from patient_info pi
lateral view posexplode (entryInfo) ei as i,entryInfo
;
+---------+---+------------+-----------+----------+---------------+---------------+
| pi.code | i | statuscode | starttime | endtime | strengthvalue | strengthunits |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 1 | completed | 20110729 | 20110822 | 24 | h |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 2 | completed | 20120130 | 20120326 | 12 | h |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 3 | completed | 20100412 | 20110822 | 8 | d |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 1 | completed | 20110729 | 20110822 | 24 | h |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 2 | completed | 20120130 | 20120326 | 12 | h |
+---------+---+------------+-----------+----------+---------------+---------------+
| 10160-0 | 3 | completed | 20100412 | 20110822 | 8 | d |
+---------+---+------------+-----------+----------+---------------+---------------+