I want to read a .tsv file from Hbase into hive. The file has a columnfamily, which has 3 columns inside: news, social and all. The aim is to store these columns in an table in hbase which has the columns news, social and all.
CREATE EXTERNAL TABLE IF NOT EXISTS topwords_logs (key String,
columnfamily String , wort String , col String, occurance int)ROW FORMAT
DELIMITED FIELDS TERMINATED BY '\t'STORED AS TEXTFILE LOCATION '/home
/hfu/Testdaten';
load data local inpath '/home/hfu/Testdaten/part-r-00000.tsv' into table topwords_logs;
CREATE TABLE newtopwords (columnall int, columnsocial int , columnnews int) PARTITIONED BY(wort STRING) STORED AS SEQUENCEFILE;
Here i created a external table, which contain the data from hbase. Further on I created a table with the 3 columns.
What i have tried so far is this:
insert overwrite table newtopwords partition(wort)
select occurance ,'1', '1' , wort from topwords_log;
This Code works fine, but i have for each column an extra where clause. How can I insert data like this?
insert overwrite table newtopwords partition(wort)
values(columnall,(select occurance from topwords_logs where col =' all')),(columnnews,( select occurance from topwords_logs where col =' news')) ,(columnsocial,( select occurance from topwords_logs where col =' social')),(wort,(select wort from topwords_log));
This code isnt working ->NoViableAltException.
On every example I just see Code, where they insert data without a Where clause. How can I insert Data with a Where clause?
Related
I'm not able to import data on partitioned table in Hive.
Here is how I create the table
CREATE TABLE IF NOT EXISTS title_ratings
(
tconst STRING,
averageRating DOUBLE,
numVotes INT
)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\t'
STORED AS TEXTFILE
TBLPROPERTIES("skip.header.line.count"="1");
And then I load the data into it : LOAD DATA INPATH '/title.ratings.tsv.gz' INTO TABLE eval_hive_db.title_ratings;
It works fine till here. Now I want to create a dynamic partitioned table. First of all, I setup theses params:
SET hive.exec.dynamic.partition=true;
SET hive.exec.dynamic.partition.mode=nonstrict;
I now create my partitioned table:
CREATE TABLE IF NOT EXISTS title_ratings_part
(
tconst STRING,
numVotes INT
)
PARTITIONED BY (averageRating DOUBLE)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY '\n'
STORED AS TEXTFILE;
insert into title_ratings_part partition(title_ratings) select tconst, averageRating, numVotes from title_ratings;
(I also tried with numVotes instead by the way)
And I receive this error: FAILED: ValidationFailureSemanticException eval_hive_db.title_ratings_part: Partition spec {title_ratings=null} contains non-partition columns
Someone can help me please?
Ideally, I want to partition my table by averageRating (less than 2, between 2 and 4, and greater than 4)
You can run this command to check if there are null values or not.
select count(averageRating) from title_ratings group by averageRating;
Now, if there are null values in this column then you will get the count, which you have to fill then apply partitioning again.
Partition column is stored as last column in a table so while inserting you need to maintain correct order in select statement.
Pls change order of columns in select.
insert into title_ratings_part partition(title_ratings)
Select
Tconst,
numVotes,
averageRating --orderwise this should always be last column
from title_ratings
I'm trying to copy data from a table called accounts into an empty table called accounts_by_area_code. I have the following fields in accounts_by_area_code: acct_num INT, first_name STRING, last_name STRING, phone_number STRING. The table is partitioned by areacode (the first 3 digits of phone_number.
I need to use a SELECT statement to extract the area code into an INSERT INTO TABLE command to copy the specified columns to the new table, dynamically partitioning by area code.
This is my last attempt:
impala-shell -q "INSERT INTO TABLE accounts_by_areacode (acct_num, first_name, last_name, phone_number, areacode) PARTITION (areacode) SELECT STRLEFT (phone_number,3) AS areacode FROM accounts;"
This generates ERROR: AnalysisException: Column permutation and PARTITION clause mention more columns (5) than the SELECT / VALUES clause and PARTITION clause return (1). I'm not convinced I have even the basic syntax correct so any help would be great as I'm new to Impala.
Impala creates partitions dynamically based on data. So not sure why you want to create an empty table with partitions because it will be auto created while inserting new data.
Still, I think you can create empty table with partitions like this-
impala-shell -q "INSERT INTO TABLE accounts_by_areacode (acct_num) PARTITION (areacode)
SELECT CAST(NULL as STRING), STRLEFT (phone_number,3) AS areacode FROM accounts;"
I have a CSv file:
Name,Age,City,Country
SACHIN,44,PUNE,INDIA
TENDULKAR,45,MUMBAI,INDIA
SOURAV,45,NEW YORK,USA
GANGULY,45,CHICAGO,USA
I created a HIVE table and loaded the data into it.
I found that the above file is wrong and corrected file is below:
Name,Age,City,Country
SACHIN,44,PUNE,INDIA
TENDULKAR,45,MUMBAI,INDIA
SOURAV,45,NEW JERSEY,USA
GANGULY,45,CHICAGO,USA
I need to update my main table with correct file.
I have tried below approaches.
1- Created the main table as a partitioned table on City and dynamically loaded the first file.
Step1- Creating a temp table and loading the old.csv file as it is without partitioning. This step I am doing to insert data in main table dyn dynamically by not creating separate input files per partition.
create table temp(
name string,
age int,
city string,
country string)
row format delimited
fields terminated by ','
stored as textfile;
Step2- Loaded old file into temporary table.
load data local inpath '/home/test_data/old.csv' into table temp;
Step3- Creating the main partitioned table.
create table dyn(
name string,
age int)
partitioned by(city string,country string)
row format delimited
fields terminated by ','
stored as textfile;
Step4- Inserting dynamically the old.csv file into the partitioned table from temporary table.
insert into table dyn
partition(city,country)
select name,age,city,country from temp;
Old recorded dynamically inserted into main table. In the next steps I am trying to correct the main table dyn with old.csv to new.csv
Step5- Creating another temporary table with new and correct input file.
create table temp1(
name string,
age int,
city string,
country string)
row format delimited
fields terminated by ','
stored as textfile;
Step6- Loading the new and correct input file into second temp table which will then be used to overwrite the main table but only the row whose data was wrong in old.csv. That is for SOURAV,45,NEW YORK,USA to SOURAV,45,NEW JERSEY,USA.
load data local inpath '/home/test_data/new.csv' into table temp1;
Overwriting the main table but only the row whose data was wrong in old.csv. That is for SOURAV,45,NEW YORK,USA to SOURAV,45,NEW JERSEY,USA.
Final overwrite Step7 attempt 1-
insert overwrite table dyn partition(country='USA' , city='NEW YORK') select city,country from temp1 t where t.city='NEW JERSEY' and t.country='USA';
Result:- Inserted NUll in Name column.
NEW JERSEY NULL NEW YORK USA
Final overwrite Step7 attempt 2-
insert overwrite table dyn partition(country='USA' , city='NEW YORK') select name,age from temp1 t where t.city='NEW JERSEY' and t.country='USA';
Result:- No change in dyn table. Same as before. NEW YORk did not update to NEW JERSEY
Final overwrite Step7 attempt3 -
insert overwrite table dyn partition(country='USA' , city='NEW YORK') select * from temp1 t where t.city='NEW JERSEY' and t.country='USA';
Error:- FAILED: SemanticException [Error 10044]: Line 1:23 Cannot Insert into target table because column number/types are different. Table insclause-0 has 2 columns,but query has 4 columns
What is the correct approach for this problem.
I have created a table in Hive with the following query:
create table if not exists employee(CASE_NUMBER String,
CASE_STATUS String,
CASE_RECEIVED_DATE DATE,
DECISION_DATE DATE,
EMPLOYER_NAME STRING,
PREVAILING_WAGE_PER_YEAR BIGINT,
PAID_WAGE_PER_YEAR BIGINT,
order_n int) partitioned by (JOB_TITLE_SUBGROUP STRING) row format delimited fields terminated by ',';
I tried loading data into the create table using below query:
LOAD DATA INPATH '/salary_data.csv' overwrite into table employee partition (JOB_TITLE_SUBGROUP);
For the partitioned table, I have even set following configuration :
set hive.exec.dynamic.partition.mode=nonstrict;
set hive.exec.dynamic.partition=true;
But I am getting below error while executing the load query:
Your query has the following error(s):
Error while compiling statement: FAILED: SemanticException org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Invalid partition key & values; keys [job_title_subgroup, ], values [])
Please help.
If you want to load data into a Hive partition, you have to provide the value of the partition itself in the LOAD DATA query. So in this case, your query would be something like this.
LOAD DATA INPATH '/salary_data.csv' overwrite into table employee partition (JOB_TITLE_SUBGROUP="Value");
Where "Value" is the name of the partition in which you are loading your data. The reason is because Hive will use "Value" to create the directory in which your .csv is going to be stored, which will be something like this: .../employee/JOB_TITLE_SUBGROUP=Value. I hope this helps.
Check the documentation for details on the LOAD DATA syntax.
EDITED
Since the table has dynamic partition, one solution would be loading the .csv into an external table (e.g. employee_external) and then execute an INSERT command like this:
INSERT OVERWRITE INTO TABLE employee PARTITION(JOB_TITLE_SUBGROUP)
SELECT CASE_NUMBER, CASE_STATUS, (...), JOB_TITLE_SUBGROUP
FROM employee_external
I might be little late to reply but can try below steps:
Set below properties first :
Ø set hive.exec.dynamic.partition.mode=nonstrict;
Ø set hive.exec.dynamic.partition=true;
Create temp table first:
CREATE EXTERNAL TABLE IF NOT EXISTS employee_temp(
ID STRING,
Name STRING,
Salary STRING)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
tblproperties ("skip.header.line.count"="1");
Load Data in temporary table:
hive> LOAD DATA INPATH 'filepath/employee.csv' OVERWRITE INTO TABLE employee;
Create Partitioned Table:
CREATE EXTERNAL TABLE IF NOT EXISTS employee_part(
ID STRING,
Name STRING)
PARTITIONED BY (Salary STRING)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
tblproperties ("skip.header.line.count"="1");
Load Data into partitioned table from intermediate / temp table:
INSERT OVERWRITE TABLE employee_part PARTITION (SALARY) SELECT * FROM employee;
Suppose I have a table definition as follows in Hive(the actual table has around 65 columns):
CREATE EXTERNAL TABLE S.TEST (
COL1 STRING,
COL2 STRING
)
PARTITIONED BY (extract_date STRING)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\007'
LOCATION 'xxx';
Once the table is created, when I run hive -e "describe s.test", I see extract_date as being one of the columns on the table. Doing a select * from s.test also returns extract_date column values. Is it possible to exclude this virtual(?) column when running select queries in Hive.
Change this property
set hive.support.quoted.identifiers=none;
and run the query as
SELECT `(extract_date)?+.+` FROM <table_name>;
I tested it working fine.