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)
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