MAP DATA EXPERIMENT::
table creation:
hive> create table mapt(name string,ded map<string,float>)
> row format delimited
>fields terminated by '\t'
> collection items terminated by ':'
> map keys terminated by '='
>lines terminated by '\n'
>stored as textfile;
mapdata.txt:
rao da=0.2:pf=0.3:hra=0.2
Access Map data:
hive> select ded["pf"] from mapt;
Total MapReduce jobs = 1
Launching Job 1 out of 1
-----------------
--------------
--------------
2017-02-18 12:41:03,728 Stage-1 map = 100%, reduce = 100%
Ended Job = job_201702181008_0003
OK
0.3
Time taken: 8.433 seconds
-----------------------------------------------------------------------
STRUCTURE DATA EXPERIMENT:
table creation:
hive> create table strut(
> name string,
> address struct<city:string, state:string, pin:int>)
> row format delimited
> fields terminated by '\t'
> collection items terminated by ','
> lines terminated by '\n'
> stored as textfile;
OK
strdata.txt:
[training@localhost ~]$ cat > strdata.txt
sekhar jj,ap,521006
Access structure data:
hive> select address.city from strut;
op:
------------------------
----------------------------
2017-02-18 13:01:28,173 Stage-1 map = 0%, reduce = 0%
2017-02-18 13:01:30,205 Stage-1 map = 100%, reduce = 0%
2017-02-18 13:01:32,230 Stage-1 map = 100%, reduce = 100%
Ended Job = job_201702181008_0004
OK
jj
Time taken: 8.323 seconds
table creation:
hive> create table mapt(name string,ded map<string,float>)
> row format delimited
>fields terminated by '\t'
> collection items terminated by ':'
> map keys terminated by '='
>lines terminated by '\n'
>stored as textfile;
mapdata.txt:
rao da=0.2:pf=0.3:hra=0.2
Access Map data:
hive> select ded["pf"] from mapt;
Total MapReduce jobs = 1
Launching Job 1 out of 1
-----------------
--------------
--------------
2017-02-18 12:41:03,728 Stage-1 map = 100%, reduce = 100%
Ended Job = job_201702181008_0003
OK
0.3
Time taken: 8.433 seconds
-----------------------------------------------------------------------
STRUCTURE DATA EXPERIMENT:
table creation:
hive> create table strut(
> name string,
> address struct<city:string, state:string, pin:int>)
> row format delimited
> fields terminated by '\t'
> collection items terminated by ','
> lines terminated by '\n'
> stored as textfile;
OK
strdata.txt:
[training@localhost ~]$ cat > strdata.txt
sekhar jj,ap,521006
Access structure data:
hive> select address.city from strut;
op:
------------------------
----------------------------
2017-02-18 13:01:28,173 Stage-1 map = 0%, reduce = 0%
2017-02-18 13:01:30,205 Stage-1 map = 100%, reduce = 0%
2017-02-18 13:01:32,230 Stage-1 map = 100%, reduce = 100%
Ended Job = job_201702181008_0004
OK
jj
Time taken: 8.323 seconds
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