Markus Kemper created SQOOP-3210:
------------------------------------
Summary: Sqoop1 (import + --hive-import + --map-column-hive) using
column aliases fails with error (Import failed: No column by the name)
Key: SQOOP-3210
URL: https://issues.apache.org/jira/browse/SQOOP-3210
Project: Sqoop
Issue Type: Improvement
Environment: $ sqoop version
17/07/17 12:28:51 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.10.1
Reporter: Markus Kemper
Sqoop1 (import + --hive-import + --map-column-hive) using column aliases fails
with error (Import failed: No column by the name), see test case below.
Please enable the ability to use column aliases.
*Test Case*
{noformat}
#################
# STEP 01 - Create Table and Data
#################
[example]
export MYCONN=jdbc:mysql://host.domain.com:3306/db1
export MYUSER=sqoop
export MYPSWD=sqoop
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"drop table t1"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"create table t1 (c1 int, c2 date, c3 varchar(10))"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"insert into t1 values (1, current_date, 'some data')"
sqoop eval --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"select * from t1"
Output:
-----------------------------------------
| c1 | c2 | c3 |
-----------------------------------------
| 1 | 2017-07-17 | some data |
-----------------------------------------
#################
# STEP 02 - Verify Hive Import (baseline)
#################
beeline -u jdbc:hive2:// -e "use db1; drop table t1 purge;"
sqoop import --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"select * from t1 where \$CONDITIONS" --num-mappers 1 --target-dir
/data/dbs/db1/t1 --delete-target-dir --fields-terminated-by ','
--lines-terminated-by '\n' --as-textfile --hive-import --hive-database db1
--hive-table t1
beeline -u jdbc:hive2:// -e "use db1; desc t1; select * from t1"
Output:
+-----------+------------+----------+--+
| col_name | data_type | comment |
+-----------+------------+----------+--+
| c1 | int | |
| c2 | string | |
| c3 | string | |
+-----------+------------+----------+--+
+--------+-------------+------------+--+
| t1.c1 | t1.c2 | t1.c3 |
+--------+-------------+------------+--+
| 1 | 2017-07-17 | some data |
+--------+-------------+------------+--+
#################
# STEP 03 - Verify Hive Import with (--map-column-hive)
#################
beeline -u jdbc:hive2:// -e "use db1; drop table t1 purge;"
sqoop import --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"select * from t1 where \$CONDITIONS" --num-mappers 1 --target-dir
/data/dbs/db1/t1 --delete-target-dir --fields-terminated-by ','
--lines-terminated-by '\n' --as-textfile --hive-import --hive-database db1
--hive-table t1 --map-column-hive "c2=date,c3=varchar(10)"
beeline -u jdbc:hive2:// -e "use db1; desc t1; select * from t1"
+-----------+--------------+----------+--+
| col_name | data_type | comment |
+-----------+--------------+----------+--+
| c1 | int | |
| c2 | date | |
| c3 | varchar(10) | |
+-----------+--------------+----------+--+
+--------+-------------+------------+--+
| t1.c1 | t1.c2 | t1.c3 |
+--------+-------------+------------+--+
| 1 | 2017-07-17 | some data |
+--------+-------------+------------+--+
#################
# STEP 04 - Verify Hive Import with (--map-column-hive) and (database.table)
notation
#################
beeline -u jdbc:hive2:// -e "use db1; drop table t1 purge;"
sqoop import --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"select * from t1 where \$CONDITIONS" --num-mappers 1 --target-dir
/data/dbs/db1/t1 --delete-target-dir --fields-terminated-by ','
--lines-terminated-by '\n' --as-textfile --hive-import --hive-database db1
--hive-table t1 --map-column-hive "db1.c2=date,db1.c3=varchar(10)"
beeline -u jdbc:hive2:// -e "use db1; desc t1; select * from t1"
Output:
17/07/17 12:10:47 INFO mapreduce.ImportJobBase: Transferred 23 bytes in 20.602
seconds (1.1164 bytes/sec)
17/07/17 12:10:47 INFO mapreduce.ImportJobBase: Retrieved 1 records.
17/07/17 12:10:47 INFO manager.SqlManager: Executing SQL statement: select *
from t1 where (1 = 0)
17/07/17 12:10:47 INFO manager.SqlManager: Executing SQL statement: select *
from t1 where (1 = 0)
17/07/17 12:10:47 ERROR tool.ImportTool: Import failed: No column by the name
db1.c3found while importing data
#################
# STEP 05 - Verify Hive Import with (--map-column-hive) and (column alias)
notation
#################
beeline -u jdbc:hive2:// -e "use db1; drop table t1 purge;"
sqoop import --connect $MYCONN --username $MYUSER --password $MYPSWD --query
"select a.c1, a.c2, a.c3 from t1 a where \$CONDITIONS" --num-mappers 1
--target-dir /data/dbs/db1/t1 --delete-target-dir --fields-terminated-by ','
--lines-terminated-by '\n' --as-textfile --hive-import --hive-database db1
--hive-table t1 --map-column-hive "a.c2=date,a.c3=varchar(10)"
beeline -u jdbc:hive2:// -e "use db1; desc t1; select * from t1"
Output:
17/07/17 12:13:12 INFO mapreduce.ImportJobBase: Transferred 23 bytes in 20.7211
seconds (1.11 bytes/sec)
17/07/17 12:13:12 INFO mapreduce.ImportJobBase: Retrieved 1 records.
17/07/17 12:13:12 INFO manager.SqlManager: Executing SQL statement: select
a.c1, a.c2, a.c3 from t1 a where (1 = 0)
17/07/17 12:13:12 INFO manager.SqlManager: Executing SQL statement: select
a.c1, a.c2, a.c3 from t1 a where (1 = 0)
17/07/17 12:13:12 ERROR tool.ImportTool: Import failed: No column by the name
a.c3found while importing data
{noformat}
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