[SQOOP-3210] Sqoop1 (import + --hive-import + --map-column-hive) using column aliases fails with error (Import failed: No column by the name)

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved

Environment

$ sqoop version
17/07/17 12:28:51 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.10.1

• Assignee: Unassigned
• Reporter: Markus Kemper
• Created: 17/Jul/17 19:31
• Updated: 17/Jul/17 19:31

Description

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

#################
# 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