Question

我正在尝试使用猪中的 Hcatalog 来加载我的hive表，因为我已经写了下面的代码，但是我收到了错误。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serde获取字段： com.ibm.spss.hive.serde2.xml.XmlSerDe java.lang.RuntimeException： MetaException（消息：java.lang.ClassNotFoundException类 com.ibm.spss.hive.serde2.xml.XmlSerDe not found）at org.apache.hadoop.hive.ql.metadata.Table.getDeserializerFromMetaStore（Table.java:275）在 org.apache.hadoop.hive.ql.metadata.Table.getDeserializer（Table.java:255）在org.apache.hadoop.hive.ql.metadata.Table.getCols（Table.java:602）在 org.apache.hive.hcatalog.common.HCatUtil.getTableSchemaWithPtnCols（HCatUtil.java:184）在 org.apache.hive.hcatalog.pig.HCatLoader.getSchema（HCatLoader.java:216）在 org.apache.pig.newplan.logical.relational.LOLoad.getSchemaFromMetaData（LOLoad.java:175）在 org.apache.pig.newplan.logical.relational.LOLoad。（LOLoad.java:89）在 org.apache.pig.parser.LogicalPlanBuilder.buildLoadOp（LogicalPlanBuilder.java:866）在 org.apache.pig.parser.LogicalPlanGenerator.load_clause（LogicalPlanGenerator.java:3568）在 org.apache.pig.parser.LogicalPlanGenerator.op_clause（LogicalPlanGenerator.java:1625）在 org.apache.pig.parser.LogicalPlanGenerator.general_statement（LogicalPlanGenerator.java:1102）在 org.apache.pig.parser.LogicalPlanGenerator.statement（LogicalPlanGenerator.java:560）在 org.apache.pig.parser.LogicalPlanGenerator.query（LogicalPlanGenerator.java:421）在 org.apache.pig.parser.QueryParserDriver.parse（QueryParserDriver.java:188）在org.apache.pig.PigServer $ Graph.parseQuery（PigServer.java:1688）at at org.apache.pig.PigServer $ Graph.registerQuery（PigServer.java:1635）at org.apache.pig.PigServer.registerQuery（PigServer.java:587）at 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）在org.apache.pig.tools.grunt.Grunt.run（Grunt.java：69）at org.apache.pig.Main.run（Main.java:547）at org.apache.pig.Main.main（Main.java:158）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.apache.hadoop.util.RunJar.run（RunJar.java:221）at org.apache.hadoop.util.RunJar.main（RunJar.java:136）引起： MetaException（消息：java.lang.ClassNotFoundException类 com.ibm.spss.hive.serde2.xml.XmlSerDe not found）at org.apache.hadoop.hive.metastore.MetaStoreUtils.getDeserializer（MetaStoreUtils.java:400）

更新

我在hive中存储数据的命令如下所示。

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 ;

示例：

 <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>

Answer 1

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"}}] |
+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

爆炸选项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             |
+---------+---+------------+-----------+----------+---------------+---------------+

在Pig

1 个答案:

选项1

选项2

选项3

爆炸选项3