sqoop操作之HIVE导出到ORACLE

示例数据准备

hive中创建dept表

create table dept(
deptno int,
dname string,
loc string
)
row format delimited fields terminated by ‘\t‘ lines terminated by ‘\n‘
stored as textfile;

导入数据：

sqoop import --connect jdbc:oracle:thin:@192.168.1.107:1521:ORCL \
--username SCOTT --password tiger \
--table DEPT  \
--hive-overwrite --hive-import  --hive-table dept \
--fields-terminated-by ‘\t‘ --lines-terminated-by ‘\n‘ \
-m 3;

HIVE导出到ORACLE

需要分两步：
第一步：先写入到hdfs

insert overwrite directory ‘/user/hadoop/DEPT_HIVE_EXPORT‘ select * from dept;

第二步：由hdfs导出到oracle

导出到数据库时，要确保表已经在数据库中存在，否则报错。

create table DEPT_DEMO as select * from DEPT where 1=2;
sqoop export --connect jdbc:oracle:thin:@192.168.1.107:1521:ORCL \
--username SCOTT --password tiger \
--table DEPT_DEMO  \
--export-dir /user/hadoop/DEPT_HIVE_EXPORT \
--fields-terminated-by ‘\001‘  \
-m 2;

注：从hive导出到hdfs的分隔符不是,而是\001；如果不指定分隔符，则报错：Caused by: java.lang.NumberFormatException

sqoop操作之HIVE导出到ORACLE