I tried to (CDC)append new data of a table from Teradata database to HDFS path of already moved old data.
sqoop import --connect 'jdbc:teradata://xx.xx.xx.xx/database_name' --connection-manager org.apache.sqoop.teradata.TeradataConnManager --username dbc --password dbc --query "select * from database_name.table_name WHERE (1=0 OR \$CONDITIONS) tymstp>'2016-07-28 04:49:53.44'" --fields-terminated-by '\t' --lines-terminated-by '\n' --target-dir /hdfs/path -m 1 --append
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I have a requirement.
I need to get data from Teradata database a into Hadoop.
I have access to only view in that database and need to pull data from that view. As I don't have read/write access to that database. I cannot use --split-by column option in my sqoop import query.
So is there a option where I can say sqoop to use database b for storing the split data and then move the data into Hadoop
Query:
sqoop import \
--connect "jdbc:sqlserver://xx.aa.dd.aa;databaseName=a" \
--connection-manager org.apache.sqoop.manager.SQLServerManager \
--username XXXX \
--password XXXX \
--num-mappers 20 \
--query "select * from (select ID,name,x,y,z from TABLE1 where DT between '2018/01/01' and '2018/01/31') as temp_table where updt_date <'2018/01/31' AND \$CONDITIONS" \
--split-by id \
--target-dir /user/XXXX/sqoop_import/XYZ/2018/TABLE1
I need some help with sqoop.
First of all, I'm sorry, my english isn't very good.
Using the folowing command:
sqoop import -D mapreduce.output.fileoutputformat.compress=false --num-mappers 1 --connection-manager "com.quest.oraoop.OraOopConnManager" --connect "jdbc:Oracle:thin:#(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=myserver)(PORT=1534)))(CONNECT_DATA=(SERVICE_NAME=myservice)))" --username "rodrigo" --password pwd \
--query "SELECT column1, column2 from myTable where \$CONDITIONS" \
--null-string '' --null-non-string '' --fields-terminated-by '|' \
--lines-terminated-by '\n' --as-textfile --target-dir /data/rodrigo/myTable \
--hive-import --hive-partition-key yearmonthday --hive-partition-value '20180101' --hive-overwrite --verbose -P --m 1 --hive-table myTable
My table is already created, because I must create a solicitation for create a table in my hive database, so I can't create dinamically inside sqoop command.
I have permission to create the directory in hdfs.
When I remove the directory, sqoop logs an error saying that I have no create table permissions, and when I already create the diretory, it returns a FileAlreadyExistsException.
What can I do to solve that?
Thanks from Brazil.
I am trying to import BLOB(Image)data form oracle to Hive using below Sqoop command.
sqoop import --connect jdbc:oracle:thin:#host --username --password --m 3 --table tablename --hive-drop-import-delims --hive-table tablename --target-dir '' --split-by id;
But unsuccessful. Remember, BLOB Data stored in oracle database as Hexadecimal and we need to store this to Hive table as text or bianary.
What are the possible way to do that?
Sqoop does not know how to map blob datatype in oracle into Hive. So You need to specify --map-column-hive COLUMN_BLOB=binary
sqoop import --connect 'jdbc:oracle:thin:#host' --username $USER --password $Password --table $TABLE --hive-import --hive-table $HiveTable --map-column-hive COL_BLOB=binary --delete-target-dir --target-dir $TargetDir -m 1 -verbose
From SQL server I imported and created a hive table using the below query.
sqoop import --connect 'jdbc:sqlserver://10.1.1.12;database=testdb' --username uname --password paswd --table demotable --hive-import --hive-table hivedb.demotable --create-hive-table --fields-terminated-by ','
Command was successful, imported the data and created a table with 10000 records.
I inserted 10 new records in SQL server and tried to append these 10 records into existing hive table using --where clause
sqoop import --connect 'jdbc:sqlserver://10.1.1.12;database=testdb' --username uname --password paswd --table demotable --where "ID > 10000" --hive-import -hive-table hivedb.demotable
But the sqoop job is getting failed with error
ERROR tool.ImportTool: Error during import: Import job failed!
Where am I going wrong? any other alternatives to insert into table using sqoop.
EDIT:
After slightly changing the above command I am able to append the new rows.
sqoop import --connect 'jdbc:sqlserver://10.1.1.12;database=testdb' --username uname --password paswd --table demotable --where "ID > 10000" --hive-import -hive-table hivedb.demotable --fields-terminated-by ',' -m 1
Though it resolves the mentioned problem, I can't insert the modified rows. Is there any way to insert the modified rows without using
--incremental lastmodified parameter.
in order to append rows to hive table, use the same query you have been using before, just remove the --hive-overwrite.
I will share the 2 queries that I used to import in hive, one for overwriting and one for append, you can use the same for importing:
To OVERWRITE the previous records
sqoop import -Dmapreduce.job.queuename=default --connect jdbc:teradata://database_connection_string/DATABASE=database_name,TMODE=ANSI,LOGMECH=LDAP --username z****** --password ******* --query "select * from ****** where \$CONDITIONS" --split-by "HASHBUCKET(HASHROW(key to split)) MOD 4" --num-mappers 4 --hive-table hive_table_name --boundary-query "select 0, 3 from dbc.dbcinfo" --target-dir directory_name --delete-target-dir --hive-import --hive-overwrite --driver com.teradata.jdbc.TeraDriver
TO APPEND to the previous records
sqoop import -Dmapreduce.job.queuename=default --connect jdbc:teradata://connection_string/DATABASE=db_name,TMODE=ANSI,LOGMECH=LDAP --username ****** --password ******--query "select * from **** where \$CONDITIONS" --split-by "HASHBUCKET(HASHROW(key to split)) MOD 4" --num-mappers 4 --hive-import --hive-table guestblock.prodrptgstrgtn --boundary-query "select 0, 3 from dbc.dbcinfo" --target-dir directory_name --delete-target-dir --driver com.teradata.jdbc.TeraDriver
Note that I am using 4 mappers, you can use more as well.
I am not sure if you can give direct --append option in sqoop with --hive-import option. Its still not available atleast in version 1.4.
The default behavior is append when --hive-overwrite and --create-hive-table is missing. (atleast in this context.
I go with nakulchawla09's answer. Though remind yourself to keep the --split-by option . This will ensure the split names in hive data store is appropriately created. otherwise you will not like the default naming. You can ignore this comment in case you don't care for the backstage hive warehouse naming and backstage data store. When i tried with the below command
Before the append
beeline:hive2> select count(*) from geolocation;
+-------+--+
| _c0 |
+-------+--+
| 8000 |
+-------+--+
file in hive warehouse before the append
-rwxrwxrwx 1 root hdfs 479218 2018-10-12 11:03 /apps/hive/warehouse/geolocation/part-m-00000
sqoop command for appending additional 8k records again
sqoop import --connect jdbc:mysql://localhost/RAWDATA --table geolocation --username root --password hadoop --target-dir /rawdata --hive-import --driver com.mysql.jdbc.Driver --m 1 --delete-target-dir
it created the below files. You can see the file name is not great because did not give a split by option or split hash (can be datetime or date).
-rwxrwxrwx 1 root hdfs 479218 2018-10-12 11:03 /apps/hive/warehouse/geolocation/part-m-00000
-rwxrwxrwx 1 root hdfs 479218 2018-10-12 11:10 /apps/hive/warehouse/geolocation/part-m-00000_copy_1
hive records appended now
beeline:hive2> select count(*) from geolocation;
+-------+--+
| _c0 |
+-------+--+
| 16000 |
+-------+--+
We can use this command:
sqoop import --connect 'jdbc:sqlserver://10.1.1.12;database=testdb' --username uname --password paswd --query 'select * from demotable where ID > 10000' --hive-import --hive-table hivedb.demotable --target-dir demotable_data
Use --append option and -m 1 so it will be like below :
sqoop import --connect 'jdbc:sqlserver://10.1.1.12;database=testdb' --username uname --password paswd --table demotable --hive-import --hive-table hivedb.demotable --append -m 1
When I launch the following Sqoop command for writing data from DB2 directly to HBase:
sqoop import --verbose --connect jdbc:db2://XXXX:PPP/DDDDD
--username username --password password
--table table
--hbase-table hbaseTable
--column-family cf
-hbase-row-key KEY1,KEY2
-m 1 --append
Sqoop import all data in my Hbase table and set as id: KEY1_KEY2
It is possible to import keys also as values in hbase table?
such as:
TABLE_HBASE
id:KEY1_KEY2 cf:field1 value
id:KEY1_KEY2 cf:field2 value
id:KEY1_KEY2 cf:field3 value
id:KEY1_KEY2 cf:KEY1 value
id:KEY1_KEY2 cf:KEY2 value
Solved this problem
It needs to add -D sqoop.hbase.add.row.key=true to Sqoop command
for instance:
sqoop import -D sqoop.hbase.add.row.key=true --verbose --connect jdbc:db2://XXXX:PPP/DDDDD
--username username --password password
--table table
--hbase-table hbaseTable
--column-family cf
-hbase-row-key KEY1,KEY2
-m 1 --append