Apache Drill 1.2 and Oracle JDBC - jdbc

Question

Using Apache Drill v1.2 and Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit in embedded mode.
I'm curious if anyone has had any success connecting Apache Drill to an Oracle DB. I've updated the drill-override.conf with the following configurations (per documents):
drill.exec: {
cluster-id: "drillbits1",
zk.connect: "localhost:2181",
drill.exec.sys.store.provider.local.path = "/mypath"
}
and placed the ojdbc6.jar in \apache-drill-1.2.0\jars\3rdparty. I can successfully create the storage plug-in:
{
"type": "jdbc",
"driver": "oracle.jdbc.driver.OracleDriver",
"url": "jdbc:oracle:thin:#<IP>:<PORT>:<SID>",
"username": "USERNAME",
"password": "PASSWORD",
"enabled": true
}
but when I issue a query such as:
select * from <storage_name>.<schema_name>.`dual`;
I get the following error:
Query Failed: An Error Occurred
org.apache.drill.common.exceptions.UserRemoteException: VALIDATION ERROR: From line 1, column 15 to line 1, column 20: Table '<storage_name>.<schema_name>.dual' not found [Error Id: 57a4153c-6378-4026-b90c-9bb727e131ae on <computer_name>:<PORT>].
I've tried to query other schema/tables and get a similar result. I've also tried connecting to Teradata and get the same error. Does any one have suggestions/run into similar issues?

Answer 1

It's working with Drill 1.3 (released on 23-Dec-2015)
Plugin: name - oracle
{
"type": "jdbc",
"driver": "oracle.jdbc.driver.OracleDriver",
"url": "jdbc:oracle:thin:user/password#192.xxx.xxx.xxx:1521:orcl ",
"enabled": true
}
Query:
select * from <plugin-name>.<user-name>.<table-name>;
Example:
select * from oracle.USER.SAMPLE;
Check drill's documentation for more details.
Note: Make sure you added ojdbc7.12.1.0.2.jar(recommended in docs) in apache-drill-1.3.0/jars/3rdparty

Answer 2

It kind of works in Apache drill 1.3.
The strange thing is that I can only query the tables for which there are synonyms created...
In the command line try:
use <storage_name>;
show tables;
This will give you a list of objects that you can query - dual is not on that list ;-).

Answer 3

I'm using apache-drill-1.9.0 and it seems that the schema name is interpreted case sensitive and must be be therefore be in upper case.
For a table user1.my_tab (which is per default created in Oracle in upper case)
this works in Drill (plugin name is oracle)
SELECT * FROM oracle.USER1.my_tab;
But this triggers an error
SELECT * FROM oracle.user1.my_tab;
SEVERE: org.apache.calcite.sql.validate.SqlValidatorException: Table 'oracle.user1.my_tab' not found
An alternative approach is to set the plugin name and the schema name with use (owner must be upper case as well)
0: jdbc:drill:zk=local> use oracle.USER1;
+-------+-------------------------------------------+
| ok | summary |
+-------+-------------------------------------------+
| true | Default schema changed to [oracle.USER1] |
+-------+-------------------------------------------+
1 row selected (0,169 seconds)
0: jdbc:drill:zk=local> select * from my_tab;
+------+
| X |
+------+
| 1.0 |
| 1.0 |
+------+
2 rows selected (0,151 seconds)