我正在尝试导入一个teradata表,它有一个复合键作为主键。因此设置 --num mapper
在没有 --split-by
参数。但是,我遇到了以下问题。请帮忙。
Error: java.io.IOException: SQLException in nextKeyValue
at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:277)
at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556)
at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1709)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
Caused by: com.teradata.jdbc.jdbc_4.util.JDBCException: [Teradata Database] [TeraJDBC 14.00.00.01] [Error 3707] [SQLState 42000] Syntax error, expected something like a name or a Unicode delimited identifier between the word 'Record' and the 'Start' keyword.
at com.teradata.jdbc.jdbc_4.util.ErrorFactory.makeDatabaseSQLException(ErrorFactory.java:307)
at com.teradata.jdbc.jdbc_4.statemachine.ReceiveInitSubState.action(ReceiveInitSubState.java:102)
at com.teradata.jdbc.jdbc_4.statemachine.StatementReceiveState.subStateMachine(StatementReceiveState.java:298)
at com.teradata.jdbc.jdbc_4.statemachine.StatementReceiveState.action(StatementReceiveState.java:179)
at com.teradata.jdbc.jdbc_4.statemachine.StatementController.runBody(StatementController.java:120)
at com.teradata.jdbc.jdbc_4.statemachine.StatementController.run(StatementController.java:111)
at com.teradata.jdbc.jdbc_4.TDStatement.executeStatement(TDStatement.java:372)
at com.teradata.jdbc.jdbc_4.TDStatement.prepareRequest(TDStatement.java:541)
at com.teradata.jdbc.jdbc_4.TDPreparedStatement.<init>(TDPreparedStatement.java:96)
at com.teradata.jdbc.jdk6.JDK6_SQL_PreparedStatement.<init>(JDK6_SQL_PreparedStatement.java:21)
at com.teradata.jdbc.jdk6.JDK6_SQL_Connection.constructPreparedStatement(JDK6_SQL_Connection.java:76)
at com.teradata.jdbc.jdbc_4.TDSession.prepareStatement(TDSession.java:1491)
at org.apache.sqoop.mapreduce.db.DBRecordReader.executeQuery(DBRecordReader.java:101)
2条答案
按热度按时间sirbozc51#
尝试在sqoop命令中使用-m1而不是--num mapper 1。
00jrzges2#
你必须使用
--split-by
或者--boundary-query
选项,不管--num-mappers
或者-m
选项。拆分列不一定等于pk。您可以有复杂的pk和一些int-split列。但是使用组合键中的一列作为
--split-by
选项。--split-by
用于拆分工作单元的表的~~>列也试试看
--boundry-query
+--split-by
如果以上选项(仅限--split-by
)不起作用:默认情况下,sqoop将使用query
select min(<split-by>), max(<split-by>) from <table name>
找出创建拆分的边界。在某些情况下,此查询不是最佳查询,因此可以使用指定任何返回两个数值列的任意查询--boundary-query
争论。请在此处查看详细说明:https://stackoverflow.com/a/37389134/2079249
选择要导入的数据