Eugen Stoianovici created SQOOP-2791:
----------------------------------------
Summary: Errors in import when using query with aliases as source
Key: SQOOP-2791
URL: https://issues.apache.org/jira/browse/SQOOP-2791
Project: Sqoop
Issue Type: Bug
Components: codegen
Reporter: Eugen Stoianovici
Priority: Minor
SQOOP always fails with a syntax error when specifying an alias on the split
column of the source query.
$ sqoop import \
--query 'SELECT t1.i as something, t2.j FROM t1, t2 WHERE $CONDITIONS AND
t1.i = t2.i' \
--target-dir /user/eugen/sqoop1 \
--split-by t1.i \
--connect jdbc:mysql://example.com/eugen \
--username usr1 \
--password-file /user/eugen/sqoop.password
Results in:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column
't1.i' in 'field list'
The query failing in this case is:
SELECT MIN(t1.i), MAX(t1.i) FROM (SELECT t1.i as something, t2.j FROM t1, t2
WHERE (1 = 1) AND t1.i = t2.i) AS t1
This is the query for generating the splits. We can rewrite the scenario to
make this particular query successful:
sqoop import \
--query 'SELECT t1.i as something, t2.j FROM t1, t2 WHERE $CONDITIONS AND
t1.i = t2.i' \
--target-dir /user/eugen/sqoop1 \
--split-by something \
--connect jdbc:mysql://example.com/eugen \
--username usr1 \
--password-file /user/eugen/sqoop.password
This results in:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column
'something' in 'where clause'
The query failing in this case is:
SELECT t1.i as something, t2.j FROM t1, t2 WHERE ( something >= ? ) AND (
something < ? ) AND t1.i = t2.i
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
