How to use Hive Query results(multiple) in a variable for other query
1
I have two tables one is schools and one is students.I want to find all the students of a particular school.
The schema of schools is: id, name, location
and of students is :id, name, schoolId.
I wrote the following script:
schoolId=$(hive -e "set hive.cli.print.header=false;select id from school;")
hive -hiveconf "schoolId"="$schoolId"
hive>select id,name from student where schoolId like '$hiveconf:schoolId%'
I dont get any result as schoolId stores all the id together.For example there are 3 schools with id: 123, 256,346
schoolId variable stores as 123 256 346 and the result is null.
hive hiveql
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
add a comment |
1
I have two tables one is schools and one is students.I want to find all the students of a particular school.
The schema of schools is: id, name, location
and of students is :id, name, schoolId.
I wrote the following script:
schoolId=$(hive -e "set hive.cli.print.header=false;select id from school;")
hive -hiveconf "schoolId"="$schoolId"
hive>select id,name from student where schoolId like '$hiveconf:schoolId%'
I dont get any result as schoolId stores all the id together.For example there are 3 schools with id: 123, 256,346
schoolId variable stores as 123 256 346 and the result is null.
hive hiveql
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
add a comment |
1
1
1
I have two tables one is schools and one is students.I want to find all the students of a particular school.
The schema of schools is: id, name, location
and of students is :id, name, schoolId.
I wrote the following script:
schoolId=$(hive -e "set hive.cli.print.header=false;select id from school;")
hive -hiveconf "schoolId"="$schoolId"
hive>select id,name from student where schoolId like '$hiveconf:schoolId%'
I dont get any result as schoolId stores all the id together.For example there are 3 schools with id: 123, 256,346
schoolId variable stores as 123 256 346 and the result is null.
hive hiveql
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
I have two tables one is schools and one is students.I want to find all the students of a particular school.
The schema of schools is: id, name, location
and of students is :id, name, schoolId.
I wrote the following script:
schoolId=$(hive -e "set hive.cli.print.header=false;select id from school;")
hive -hiveconf "schoolId"="$schoolId"
hive>select id,name from student where schoolId like '$hiveconf:schoolId%'
I dont get any result as schoolId stores all the id together.For example there are 3 schools with id: 123, 256,346
schoolId variable stores as 123 256 346 and the result is null.
hive hiveql
hive hiveql
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
edited Nov 13 '18 at 12:05
Vijaya Seetharaman
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
asked Nov 13 '18 at 10:32
Vijaya SeetharamanVijaya Seetharaman
5919
5919
add a comment |
add a comment |
1 Answer
1
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0
Use collect_set() with concat_ws to get comma delimited string, IDs should be cast to string:
schoolId=$(hive -e "set hive.cli.print.header=false;select concat_ws('\',\'',collect_set(cast(id as string))) from school;");
hive -hiveconf "schoolId"="$schoolId"
Then use IN operator:
select id,name from student where schoolId in ('$hiveconf:schoolId');
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select queryselect concat_ws('\',\'',collect_set(cast(id as string))) from school;individually in hive i get an error sayingFAILED: ParseException line 1:22 character '' not supported here. How do I get it right?
– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding,- maybe you need one more slash, or single slash to shield comma
– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId');I tried this command within hive but again its giving me the same parse exception.
– Vijaya Seetharaman
Nov 14 '18 at 8:36
|
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1 Answer
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1 Answer
1
active
oldest
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0
Use collect_set() with concat_ws to get comma delimited string, IDs should be cast to string:
schoolId=$(hive -e "set hive.cli.print.header=false;select concat_ws('\',\'',collect_set(cast(id as string))) from school;");
hive -hiveconf "schoolId"="$schoolId"
Then use IN operator:
select id,name from student where schoolId in ('$hiveconf:schoolId');
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select queryselect concat_ws('\',\'',collect_set(cast(id as string))) from school;individually in hive i get an error sayingFAILED: ParseException line 1:22 character '' not supported here. How do I get it right?
– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding,- maybe you need one more slash, or single slash to shield comma
– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId');I tried this command within hive but again its giving me the same parse exception.
– Vijaya Seetharaman
Nov 14 '18 at 8:36
|
show 7 more comments
0
Use collect_set() with concat_ws to get comma delimited string, IDs should be cast to string:
schoolId=$(hive -e "set hive.cli.print.header=false;select concat_ws('\',\'',collect_set(cast(id as string))) from school;");
hive -hiveconf "schoolId"="$schoolId"
Then use IN operator:
select id,name from student where schoolId in ('$hiveconf:schoolId');
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select queryselect concat_ws('\',\'',collect_set(cast(id as string))) from school;individually in hive i get an error sayingFAILED: ParseException line 1:22 character '' not supported here. How do I get it right?
– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding,- maybe you need one more slash, or single slash to shield comma
– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId');I tried this command within hive but again its giving me the same parse exception.
– Vijaya Seetharaman
Nov 14 '18 at 8:36
|
show 7 more comments
0
0
0
Use collect_set() with concat_ws to get comma delimited string, IDs should be cast to string:
schoolId=$(hive -e "set hive.cli.print.header=false;select concat_ws('\',\'',collect_set(cast(id as string))) from school;");
hive -hiveconf "schoolId"="$schoolId"
Then use IN operator:
select id,name from student where schoolId in ('$hiveconf:schoolId');
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
Use collect_set() with concat_ws to get comma delimited string, IDs should be cast to string:
schoolId=$(hive -e "set hive.cli.print.header=false;select concat_ws('\',\'',collect_set(cast(id as string))) from school;");
hive -hiveconf "schoolId"="$schoolId"
Then use IN operator:
select id,name from student where schoolId in ('$hiveconf:schoolId');
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
edited Nov 13 '18 at 12:39
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
answered Nov 13 '18 at 11:17
leftjoinleftjoin
8,39422051
8,39422051
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select queryselect concat_ws('\',\'',collect_set(cast(id as string))) from school;individually in hive i get an error sayingFAILED: ParseException line 1:22 character '' not supported here. How do I get it right?
– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding,- maybe you need one more slash, or single slash to shield comma
– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId');I tried this command within hive but again its giving me the same parse exception.
– Vijaya Seetharaman
Nov 14 '18 at 8:36
|
show 7 more comments
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select queryselect concat_ws('\',\'',collect_set(cast(id as string))) from school;individually in hive i get an error sayingFAILED: ParseException line 1:22 character '' not supported here. How do I get it right?
– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding,- maybe you need one more slash, or single slash to shield comma
– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId');I tried this command within hive but again its giving me the same parse exception.
– Vijaya Seetharaman
Nov 14 '18 at 8:36
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
I got error like : cannot recognize input near ''33992,3d1e7,68a3e,1ed4b,8aaa7,c2eb2'' '<EOF>' '<EOF>' in expression specification
– Vijaya Seetharaman
Nov 13 '18 at 12:22
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
@VijayaSeetharaman Fixed. IDs are strings, need to single-quote them in concat_ws and also quote variable in the Hive query. Also no need to cast to string
– leftjoin
Nov 13 '18 at 12:40
Thank you. The above procedure worked. But when I do the select query
select concat_ws('\',\'',collect_set(cast(id as string))) from school; individually in hive i get an error saying FAILED: ParseException line 1:22 character '' not supported here. How do I get it right?– Vijaya Seetharaman
Nov 14 '18 at 8:26
Thank you. The above procedure worked. But when I do the select query
select concat_ws('\',\'',collect_set(cast(id as string))) from school; individually in hive i get an error saying FAILED: ParseException line 1:22 character '' not supported here. How do I get it right?– Vijaya Seetharaman
Nov 14 '18 at 8:26
@VijayaSeetharaman In what tool are you running it? It is something with shielding
, - maybe you need one more slash, or single slash to shield comma– leftjoin
Nov 14 '18 at 8:34
@VijayaSeetharaman In what tool are you running it? It is something with shielding
, - maybe you need one more slash, or single slash to shield comma– leftjoin
Nov 14 '18 at 8:34
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId'); I tried this command within hive but again its giving me the same parse exception.– Vijaya Seetharaman
Nov 14 '18 at 8:36
set hiveconf:schoolId=select concat_ws('\',\'',collect_set(cast(id as string))) from school; select id,name from patient where schoolId in ('$hiveconf:schoolId'); I tried this command within hive but again its giving me the same parse exception.– Vijaya Seetharaman
Nov 14 '18 at 8:36
|
show 7 more comments
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