is it possible to use the sqoop command "import table" to import a table from an oracle database to an Hadoop cluster and add an extra column with the current timestamp (for troubleshouting purposes)? so far, I have the following command:
sqoop import -Dorg.apache.sqoop.splitter.allow_text_splitter=true --connect jdbc:oracle:thin:#//MY_ORACLE_SERVER --username USERNAME --password PASSWORD --target-dir /MyDIR --fields-terminated-by '\b' --table SOURCE_TABLE --hive-table DESTINATION_TABLE --hive-import --hive-overwrite --hive-delims-replacement '<newline>'
I would like to add a timestamp column to the table so that I know when that data was loaded. Is it possible?
Thanks in advance
you can use the free-form query import instead of table import, and call the timestamp function :
sqoop import -Dorg.apache.sqoop.splitter.allow_text_splitter=true --connect jdbc:oracle:thin:#//MY_ORACLE_SERVER --username USERNAME --password PASSWORD --target-dir /MyDIR --fields-terminated-by '\b' ----query 'SELECT a.*,systimestamp FROM SOURCE_TABLE a' --hive-table DESTINATION_TABLE --hive-import --hive-overwrite --hive-delims-replacement '<newline>'
Maybe you could use sysdate instead systimestamp (smaller datatype but less precision)
You can create a temp hive table by using sqoop ,after that create a new hive table by using old one with extra required columns.
Related
I am importing a set of tables from an Oracle database into Hive using sqoop import statement as follows:
sqoop import "-Dorg.apache.sqoop.splitter.allow_text_splitter=true" --connect CONNECTIONSTRING --table TABLENAME --username USERNAME --password PASSWORD --hive-import --hive-drop-import-delims --hive-overwrite --hive-table HIVE_TABLE_NAME1 --null-string '\N' --null-non-string '\N' -m 1
and i am using the following check column keyword in this sqoop statement for incremental loads:
--check-column COLUMN_NAME --incremental lastmodified --last-value HARDCODED_DATE
I tested this and it works great but I want to modify this so that it is dynamic and I dont have to hard code the date into the statement and I can just pass it as a parameter so that it checks the specified column and gets all the data after that date. I understand that the date has to be passed from a different file but I am not really sure what the structure of the file should be and how it would be referencing this sqoop statement. Any help or guidance would be greatly appreciated. Thank you in advance!
You can use sqoop job for the same.
Using sqoop job, you have to apply last-value as 0, it will import and update the data in the job so you only have to run sqoop-job --exec <> everytime, it will update the data without any hardcoded value.
sqoop job create <<job_name>> -- import "-Dorg.apache.sqoop.splitter.allow_text_splitter=true" --connect <<db_url>> --table <<db_name>> --username <<username>> --password <<password>> --hive-import --hive-drop-import-delims --hive-overwrite --hive-table <<hive_table>> --null-string '\N' --null-non-string '\N' -m 1 --incremental lastmodified --check-column timedate --last-value 0
sqoop job --exec <<job_name>>
For more details visit https://sqoop.apache.org/docs/1.4.6/SqoopUserGuide.html#_literal_sqoop_job_literal
i am trying to import data to hive table using sqoop2. I am using --hive-import but it is not working
Code:
sqoop import --connect jdbc:sqlserver://192.168.x.xxx:11xx --username user --password user --table xxxx.NOTIFICATION --hive-import
Error:
ERROR manager.SqlManager: Error executing statement: com.microsoft.sqlserver.jdbc.SQLServerException: Invalid object name 'XXXX.NOTIFICATION'.
What am I doing wrong?
Below observations are based on Sqoop 1.4.6
you are using . (dot) in your table name.
Internally, Sqoop will fire command
SELECT t.* FROM xxxx.NOTIFICATION AS t WHERE 1=0
to fetch metadata of your SQL Server table.
This command is interpreted as
xxxx - schame name
NOTIFICATION - Table name
To avoid this you can use escape character ( [ ] in case of SQL Server):
sqoop import --connect jdbc:sqlserver://192.168.x.xxx:11xx --username user --password user --table [xxxx.NOTIFICATION] --hive-import
This will generate
SELECT t.* FROM [xxxx.NOTIFICATION] AS t WHERE 1=0
Now xxxx.NOTIFICATION will be treated as table name.
Hi after doing a bit research and discussing on the question with #dev i found the solution.
I am using sqoop2 so i changed my command and used below one and it worked for me.
$ sqoop import --connect "jdbc:sqlserver://192.168.x.xxx:11xx;database=SSSS;username=user;password=user" --query "SELECT * FROM xxxx.NOTIFICATION where \$CONDITIONS" --split-by xxxx.NOTIFICATION.ID --hive-import --hive-table NOTIFICATION --target-dir NOTIFICATION
before executing this command we should create table in hive using create command. Here i have created hive table named NOTIFICATION.
I assume the table name is NOTIFICATION and you are trying to mention database name xxxx when you write --table xxxx.NOTIFICATION
If this is the case, can you please try the below mentioned syntax instead?
sqoop import --connect jdbc:sqlserver://192.168.x.xxx:11xx;databaseName=xxxx --username user --password user --table NOTIFICATION --hive-import
I have a table in oracle with only 4 columns...
Memberid --- bigint
uuid --- String
insertdate --- date
updatedate --- date
I want to import those data in HIVE table using sqoop. I create corresponding HIVE table with
create EXTERNAL TABLE memberimport(memberid BIGINT,uuid varchar(36),insertdate timestamp,updatedate timestamp)LOCATION '/user/import/memberimport';
and sqoop command
sqoop import --connect jdbc:oracle:thin:#dbURL:1521/dbName --username ** --password *** --hive-import --table MEMBER --columns 'MEMBERID,UUID,INSERTDATE,UPDATEDATE' --map-column-hive MEMBERID=BIGINT,UUID=STRING,INSERTDATE=TIMESTAMP,UPDATEDATE=TIMESTAMP --hive-table memberimport -m 1
Its working properly and able to import data in HIVE table.
Now I want to update this table with incremental update with updatedate (last value today's date) so that I can get day to day update for that OLTP table into my HIVE table using sqoop.
For Incremental import I am using following sqoop command
sqoop import --hive-import --connect jdbc:oracle:thin:#dbURL:1521/dbName --username *** --password *** --table MEMBER --check-column UPDATEDATE --incremental append --columns 'MEMBERID,UUID,INSERTDATE,UPDATEDATE' --map-column-hive MEMBERID=BIGINT,UUID=STRING,INSERTDATE=TIMESTAMP,UPDATEDATE=TIMESTAMP --hive-table memberimport -m 1
But I am getting exception
"Append mode for hive imports is not yet supported. Please remove the parameter --append-mode"
When I remove the --hive-import it run properly but I did not found those new update in HIVE table that I have in OLTP table.
Am I doing anything wrong ?
Please suggest me how can I run incremental update with Oracle - Hive using sqoop.
Any help will be appropriated..
Thanks in Advance ...
Although i don't have resources to replicate your scenario exactly.
You might want to try building a sqoop job and test your use case.
sqoop job --create sqoop_job \
-- import \
--connect "jdbc:oracle://server:port/dbname" \
--username=(XXXX) \
--password=(YYYY) \
--table (TableName)\
--target-dir (Hive Directory corresponding to the table) \
--append \
--fields-terminated-by '(character)' \
--lines-terminated-by '\n' \
--check-column "(Column To Monitor Change)" \
--incremental append \
--last-value (last value of column being monitored) \
--outdir (log directory)
when you create a sqoop job, it takes care of --last-value for subsequent runs. Also here i have used the Hive table's data file as target for incremental update.
Hope this provides a helpful direction to proceed.
There is no direct way to achieve this in Sqoop. However you can use 4 Step Strategy.
I try to upload data from Vertica to Hive by using Sqoop.
I can see that it creates a file and a table on HIVE, but when i try to select the data from the HIVE or from the file i cannot see the data. it shows me an ERROR(there is no delimiter on the column of the file) select.
this is my code:
sqoop import -m -1 --driver com.vertica.jdbc.Driver --connect "jdbc:vertica://serverName:5443/DBName" --username "user" --password "pass" --query 'select id, name from contacts limit 10' --target-dir "folder/contacts" --hive-import --create-hive-table --hive-table db.contacts
Use these arguments and choose a delimiters for your data
--fields-terminated-by
--lines-terminated-by
I am trying to append data to already existing Table in hive.Using the Following command first i import the table from MS-SQL Server to hive.
Sqoop Command:
sqoop import --connect "jdbc:sqlserver://XXX.XX.XX.XX;databaseName=mydatabase" --table "my_table" --where "Batch_Id > 100" --username myuser --password mypassword --hive-import
Now i want to append the data to same existing table in hive where "Batch_Id < 100"
I am using the following Command:
sqoop import --connect "jdbc:sqlserver://XXX.XX.XX.XX;databaseName=mydatabase" --table "my_table" --where "Batch_Id < 100" --username myuser --password mypassword --append --hive-table my_table
This command however runs successfully also updates the HDFS data, but when u connect to hive shell and query the table, the records which are appended are not visible.
Sqoop updated the Data on hdfs "/user/hduser/my_table" but the data on "/user/hive/warehouse/batch_dim" is not updated.
How can reslove this issue.
Regards,
Bhagwant Bhobe
Try using
sqoop import --connect "jdbc:sqlserver://XXX.XX.XX.XX;databaseName=mydatabase"
--table "my_table" --where "Batch_Id < 100"
--username myuser --password mypassword
--hive-import --hive-table my_table
when you are using --hive-import DO NOT use --append parameter.
The Sqoop command you're using (--import) is only for ingesting records into HDFS. You need to use the --hive-import flag to import records into Hive.
See http://sqoop.apache.org/docs/1.4.2/SqoopUserGuide.html#_importing_data_into_hive for more details and for additional import configuration options (you may want to change the document reference to your version of Sqoop, of course).