get the current date and set it to variable in order to use it as table name in HIVE
I want to get the current date as YYMMDD and then set it to variable in order to use it as table name.
Here is my code:
set dates= date +%Y-%m-%d;
CREATE EXTERNAL TABLE IF NOT EXISTS dates(
id STRING,
region STRING,
city STRING)
But this method doesn't work, because it seems the assignments are wrong. Any idea?
hadoop hive bigdata hiveql
asked Nov 13 '18 at 12:18
angelaangela
2519
add a comment |
I want to get the current date as YYMMDD and then set it to variable in order to use it as table name.
Here is my code:
set dates= date +%Y-%m-%d;
CREATE EXTERNAL TABLE IF NOT EXISTS dates(
id STRING,
region STRING,
city STRING)
But this method doesn't work, because it seems the assignments are wrong. Any idea?
hadoop hive bigdata hiveql
asked Nov 13 '18 at 12:18
angelaangela
2519
add a comment |
I want to get the current date as YYMMDD and then set it to variable in order to use it as table name.
Here is my code:
set dates= date +%Y-%m-%d;
CREATE EXTERNAL TABLE IF NOT EXISTS dates(
id STRING,
region STRING,
city STRING)
But this method doesn't work, because it seems the assignments are wrong. Any idea?
hadoop hive bigdata hiveql
asked Nov 13 '18 at 12:18
angelaangela
2519
I want to get the current date as YYMMDD and then set it to variable in order to use it as table name.
Here is my code:
set dates= date +%Y-%m-%d;
CREATE EXTERNAL TABLE IF NOT EXISTS dates(
id STRING,
region STRING,
city STRING)
But this method doesn't work, because it seems the assignments are wrong. Any idea?
hadoop hive bigdata hiveql
hadoop hive bigdata hiveql
asked Nov 13 '18 at 12:18
angelaangela
2519
asked Nov 13 '18 at 12:18
angelaangela
2519
edited Nov 13 '18 at 12:27
angela
asked Nov 13 '18 at 12:18
angelaangela
2519
asked Nov 13 '18 at 12:18
angelaangela
2519
asked Nov 13 '18 at 12:18
angelaangela
2519
2519
add a comment |
add a comment |
1 Answer
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votes
Hive does not calculate variables, it substitutes them as is, in your case it will be exactly this string 'date +%Y-%m-%d'. Also it is not possible to use UDF like current_date() in place of table name in DDL.
The solution is to calculate variable in the shell and pass it to Hive:
In the shell
dates=$(date +%Y_%m_%d);
hive --hivevar date="$dates" -f myscript.hql
In the script:
use mydb; create table if not exists tab_${hivevar:date} (id int);
Or you can execute hive script from command line using hive -e, in this case variable can be substituted using shell:
dates=$(date +%Y_%m_%d);
hive -e "use mydb; create table if not exists tab_${dates} (id int);"
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
add a comment |
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1 Answer
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active
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1 Answer
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active
oldest
votes
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votes
Hive does not calculate variables, it substitutes them as is, in your case it will be exactly this string 'date +%Y-%m-%d'. Also it is not possible to use UDF like current_date() in place of table name in DDL.
The solution is to calculate variable in the shell and pass it to Hive:
In the shell
dates=$(date +%Y_%m_%d);
hive --hivevar date="$dates" -f myscript.hql
In the script:
use mydb; create table if not exists tab_${hivevar:date} (id int);
Or you can execute hive script from command line using hive -e, in this case variable can be substituted using shell:
dates=$(date +%Y_%m_%d);
hive -e "use mydb; create table if not exists tab_${dates} (id int);"
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
add a comment |
Hive does not calculate variables, it substitutes them as is, in your case it will be exactly this string 'date +%Y-%m-%d'. Also it is not possible to use UDF like current_date() in place of table name in DDL.
The solution is to calculate variable in the shell and pass it to Hive:
In the shell
dates=$(date +%Y_%m_%d);
hive --hivevar date="$dates" -f myscript.hql
In the script:
use mydb; create table if not exists tab_${hivevar:date} (id int);
Or you can execute hive script from command line using hive -e, in this case variable can be substituted using shell:
dates=$(date +%Y_%m_%d);
hive -e "use mydb; create table if not exists tab_${dates} (id int);"
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
add a comment |
Hive does not calculate variables, it substitutes them as is, in your case it will be exactly this string 'date +%Y-%m-%d'. Also it is not possible to use UDF like current_date() in place of table name in DDL.
The solution is to calculate variable in the shell and pass it to Hive:
In the shell
dates=$(date +%Y_%m_%d);
hive --hivevar date="$dates" -f myscript.hql
In the script:
use mydb; create table if not exists tab_${hivevar:date} (id int);
Or you can execute hive script from command line using hive -e, in this case variable can be substituted using shell:
dates=$(date +%Y_%m_%d);
hive -e "use mydb; create table if not exists tab_${dates} (id int);"
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
Hive does not calculate variables, it substitutes them as is, in your case it will be exactly this string 'date +%Y-%m-%d'. Also it is not possible to use UDF like current_date() in place of table name in DDL.
The solution is to calculate variable in the shell and pass it to Hive:
In the shell
dates=$(date +%Y_%m_%d);
hive --hivevar date="$dates" -f myscript.hql
In the script:
use mydb; create table if not exists tab_${hivevar:date} (id int);
Or you can execute hive script from command line using hive -e, in this case variable can be substituted using shell:
dates=$(date +%Y_%m_%d);
hive -e "use mydb; create table if not exists tab_${dates} (id int);"
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
answered Nov 13 '18 at 14:02
leftjoinleftjoin
8,42922151
8,42922151
add a comment |
add a comment |
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