hive splict, explode, lateral view, concat_ws

hive> create table arrays (x array<string>)
    > row format delimited fields terminated by '\001'
    > collection items terminated by '\002'
    > ;
OK
Time taken: 0.574 seconds
hive> show tables;
OK
arrays
jigou
Time taken: 0.15 seconds, Fetched: 2 row(s)
hive> show create table arrays;
OK
CREATE TABLE `arrays`(
  `x` array<string>)
ROW FORMAT DELIMITED
  FIELDS TERMINATED BY '\u0001'
  COLLECTION ITEMS TERMINATED BY '\u0002'
STORED AS INPUTFORMAT
  'org.apache.hadoop.mapred.TextInputFormat'
OUTPUTFORMAT
  'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'
LOCATION
  'hdfs://hdp1.hadoop.test:8020/apps/hive/warehouse/zhangchao.db/arrays'
TBLPROPERTIES (
  'transient_lastDdlTime'='1441481876')
Time taken: 0.399 seconds, Fetched: 13 row(s)
hive> load data local inpath './arrays.text' into arrays;
FAILED: ParseException line 1:44 missing TABLE at 'arrays' near '<EOF>'
hive> load data local inpath './arrays.text' into table arrays;
FAILED: SemanticException Line 1:23 Invalid path ''./arrays.text'': No files matching path file:/usr/java/arrays.text
hive> load data local inpath '/home/zhangchao/arrays.text' into table arrays;
Loading data to table zhangchao.arrays
Table zhangchao.arrays stats: [numFiles=1, totalSize=10]
OK
Time taken: 1.322 seconds
hive> select * from arrays;
OK
["a","b"]
["c","d","e"]
Time taken: 1.076 seconds, Fetched: 2 row(s)

hive> select explode(x) as xx from arrays;
Query ID = zhangchao_20150906052727_87971c63-6a8a-4a15-9465-2564cf22c837
Total jobs = 1
Launching Job 1 out of 1

Status: Running (Executing on YARN cluster with App id application_1440440163499_0008)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       3       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 11.95 s
--------------------------------------------------------------------------------
OK
a
b
c
d
e
Time taken: 19.465 seconds, Fetched: 5 row(s)

hive> select concat_ws(',', '1','2','3','4') from arrays;
OK
1,2,3,4
1,2,3,4
Time taken: 0.107 seconds, Fetched: 2 row(s)
hive> select split(concat_ws(',', '1','2','3','4'),',') from arrays;
OK
["1","2","3","4"]
["1","2","3","4"]
Time taken: 0.128 seconds, Fetched: 2 row(s)
hive> select split(concat_ws(',', '1','2','3','4'),',')[3] from arrays;
OK
4
4
Time taken: 0.116 seconds, Fetched: 2 row(s)

hive> select explode(split(concat_ws(',', '1','2','3','4'),',')) from arrays;
Query ID = zhangchao_20150906063535_e0067b77-0481-48aa-b3dc-055a7e6b6c3c
Total jobs = 1
Launching Job 1 out of 1

Status: Running (Executing on YARN cluster with App id application_1440440163499_0012)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       1       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 10.51 s
--------------------------------------------------------------------------------
OK
1
2
3
4
1
2
3
4
Time taken: 11.757 seconds, Fetched: 8 row(s)

hive> select * ,sp from arrays lateral view explode(split(concat_ws(',','1','2','3','4'),',')) a as sp;
Query ID = zhangchao_20150906064040_c275e654-c7d1-45d2-86a8-18fb5506d4f2
Total jobs = 1
Launching Job 1 out of 1

Status: Running (Executing on YARN cluster with App id application_1440440163499_0012)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       1       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 5.94 s
--------------------------------------------------------------------------------
OK
["a","b"]       1       1
["a","b"]       2       2
["a","b"]       3       3
["a","b"]       4       4
["c","d","e"]   1       1
["c","d","e"]   2       2
["c","d","e"]   3       3
["c","d","e"]   4       4
Time taken: 6.906 seconds, Fetched: 8 row(s)

hive> select 'xx' ,sp from arrays lateral view explode(split(concat_ws(',','1','2','3','4'),',')) a as sp;
Query ID = zhangchao_20150906064545_f1ce3669-80ff-45a5-a1a8-6211f56d77bd
Total jobs = 1
Launching Job 1 out of 1

Status: Running (Executing on YARN cluster with App id application_1440440163499_0012)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       2       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 7.20 s
--------------------------------------------------------------------------------
OK
xx      1
xx      2
xx      3
xx      4
xx      1
xx      2
xx      3
xx      4
Time taken: 8.23 seconds, Fetched: 8 row(s)

hive> select * from lateral_test;
OK
999
Time taken: 0.087 seconds, Fetched: 1 row(s)
hive> select * , sp  from lateral_test lateral view explode(split(concat_ws(',','1','2','3','4','5'),',')) as sp;
FAILED: ParseException line 1:104 extraneous input 'sp' expecting EOF near '<EOF>'
hive> select * , sp  from lateral_test lateral view explode(split(concat_ws(',','1','2','3','4','5'),',')) a as sp;
Query ID = zhangchao_20150906065252_ed187ad7-b400-4b71-add9-c7dc005f4af1
Total jobs = 1
Launching Job 1 out of 1
Tez session was closed. Reopening...
Session re-established.

Status: Running (Executing on YARN cluster with App id application_1440440163499_0014)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       1       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 7.21 s
--------------------------------------------------------------------------------
OK
999     1       1
999     2       2
999     3       3
999     4       4
999     5       5
Time taken: 16.504 seconds, Fetched: 5 row(s)

hive> select lateral_test.* , sp  from lateral_test lateral view explode(split(concat_ws(',','1','2','3','4','5'),',')) a as sp;
Query ID = zhangchao_20150906065757_2db20ede-33d6-467f-886c-574a06995041
Total jobs = 1
Launching Job 1 out of 1

Status: Running (Executing on YARN cluster with App id application_1440440163499_0014)

--------------------------------------------------------------------------------
        VERTICES      STATUS  TOTAL  COMPLETED  RUNNING  PENDING  FAILED  KILLED
--------------------------------------------------------------------------------
Map 1 ..........   SUCCEEDED      1          1        0        0       0       0
--------------------------------------------------------------------------------
VERTICES: 01/01  [==========================>>] 100%  ELAPSED TIME: 7.01 s
--------------------------------------------------------------------------------
OK
999     1
999     2
999     3
999     4
999     5
Time taken: 8.257 seconds, Fetched: 5 row(s)