db2导出数据并导入hive临时表中

Posted 2020-09-13 xitingxie

操作：

1、从db2 中导出数据到txt中

2、修改文件中的分隔符为“：”

3、在hive中新建表（建表时需要制定分隔符）

4、导入数据

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1、从db2 中导出数据到txt中

db2 -x "select col1,col2,col3  from tbl_name where xxx with ur">filename.txt

2、修改文件中的分隔符为“：”

cat filename.txt | awk ‘{print $1":"$2":"$3}‘>filename1.txt

3、在hive中新建表（建表时需要制定分隔符）

ROW FORMAT DELIMITED 分隔符设置开始语句

FIELDS TERMINATED BY：设置字段与字段之间的分隔符

COLLECTION ITEMS TERMINATED BY：设置一个复杂类型（array,struct)字段的各个item之间的分隔符

MAP KEYS TERMINATED BY：设置一个复杂类型(Map)字段的key value之间的分隔符

Hive> create table t(id struct<id1:int,id2:int,id3:int>,name array<string>,xx map<int,string>)
    > row format delimited
    > fields terminated by ‘\t‘
    > collection items terminated by ‘,‘
    > map keys terminated by ‘:‘
    > lines terminated by ‘\n‘;
OK
Time taken: 0.287 seconds

ROW FORMAT DELIMITED 必须在其它分隔设置之前，也就是分隔符设置语句的最前

LINES TERMINATED BY必须在其它分隔设置之后，也就是分隔符设置语句的最后，否则会报错

hive> create table t (id struct<id1:int,id2:int,id3:int>,name array<string>,xx map<int,string>) 
    > row format delimited
    > fields terminated by ‘\t‘
    > lines terminated by ‘\n‘
    > collection items terminated by ‘,‘
    > map keys terminated by ‘:‘;
FAILED: ParseException line 5:0 missing EOF at ‘collection‘ near ‘‘\n‘‘

4、导入数据至hive中

load data local inpath ‘filename1.txt‘ into table tbl_cdhd_usr_id_xxt_tmp