[CALCITE-2734] MongoDB adapter tutorial is out of date

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.17.0
• Fix Version/s: 1.21.0
• Component/s: mongodb-adapter
• Labels: document

Environment

Host: Mac OS 10.14.1

Calcite: Master

• Assignee: Unassigned
• Reporter: TommyLike
• Created: 11/Dec/18 01:02
• Updated: 10/Sep/19 21:35
• Resolved: 08/Aug/19 17:40

Description

Hey all,

    I am trying to learn Calcite via MongoDB adapter, and I found there is a related tutorial section in HOWTO,].  But it seems to be a little out of date now, I found several issues at least:

1. model file: mongo-zips-model.json  has been renamed into mongo-models.json.

2. data source file zips.json doesn't include all the data required in the models.json file.

3. the MongoDB adapter can not be directly used, because there is a log related bug when execute command ``!connect jdbc:calcite:model=mongodb/target/test-classes/mongo-model.json admin admin``, related output:

```
SLF4J: Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.
SLF4J: See also http://www.slf4j.org/codes.html#log4jDelegationLoop for more details.

Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.Log4jLoggerFactory

```