Apache CouchDB

Connectivity Summary

A CouchDB server hosts named databases, which store documents. Each document is uniquely named in the database, and CouchDB provides a RESTful HTTP API for reading and updating (add, edit, delete) database documents.

Ovaledge uses the REST APIs to make a connection to a running CouchDB instance.

Connector Capabilities

The connector capabilities are shown below:

Crawling

Supported objects and data types for Crawling are:

Supported Objects	Supported Data types
Tables, Table Columns	number, string, array, object

Profiling

Feature	Support
Table Profiling	Row count, Columns count, View sample data
Column Profiling	Min, Max, Null count, distinct, top 50 values
Full Profiling	Not Supported
Sample Profiling	Supported

Lineage Building

Lineage Entities	Details
Table lineage	Supported(Table to Table)
Column lineage	Not Supported
Lineage Sources	Documents

Pre-requisites

To use the connector, the following need to be available:

• Connection details as specified in the following section should be available.

• A service account, for crawling and profiling. The minimum privileges required are:

Operation	Access Permissions
Connection validate	Read Access
Crawl schemas	Read Access
Crawl tables	Read Access
Profile schemas, tables	Read Access
Query logs	NA
Get views, procedures, function code	NA

Connection Details

The following connection settings should be added for connecting to a CouchDB database:

• Database Type: CouchDB

• Connection Name: Select a Connection name for the CouchDB Server database. The name that you specify is a reference name to easily identify your CouchDB Server database connection in OvalEdge. Example: CouchDB Connection.

• Server: CouchDB URL (can vary) Example: 18.117.142.180

• Port: 5984 (can vary)

• Database: testdb

• License Type: Standard

• User name: CouchDB User

• Password: CouchDB Password

• Protocol: http/https

Property	Details
Crawler configurations
Order	Priority of the rule
Start time and End time	Used when crawling/profiling are to be scheduled
No. of threads	No. of threads used to perform profiling
Profile Type Row count Constraint	Disabled/Auto/Sample No. of rows to be fetched
Sample profile size	Sample profile row limit
Sample data count
Query Timeout	Time to wait for response
Crawler Options	Only Tables can be crawled
Crawler rules	Only table columns include and Exclude regex can be used.

Points to note

• In crawler rules, we won't be using include and exclude regex functionalities for functions and procedures.

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