ClickZetta Connector | OpenMetadata Database Integration

• Requirements
• Metadata Ingestion
• Troubleshooting

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Requirements

-- Allow the user's role to run queries on the virtual cluster used for ingestion
GRANT USAGE ON VCLUSTER <virtual_cluster> TO ROLE <role>;

-- Allow reading metadata and data from the schemas you want to ingest
GRANT SELECT ON SCHEMA <workspace>.<schema_name> TO ROLE <role>;

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Profiler and Data Quality

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Usage and Lineage

-- Workspace-local history
GRANT SELECT ON TABLE information_schema.job_history TO ROLE <role>;
-- or cross-workspace history
GRANT SELECT ON TABLE sys.information_schema.job_history TO ROLE <role>;

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Metadata Ingestion

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Step 1: Add New Service

1. Navigate to Settings > Services.
2. Click Add New Service.

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Step 2: Select a Service and Connector

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Step 3: Add Service Name and Description

• Enter a unique, descriptive Service Name. OpenMetadata identifies services by their service name. Enter a name that distinguishes this deployment from other ClickZetta services you’re ingesting metadata from.
• Optional: Enter a Description for the service.

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Step 4: Configure Connection Options

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Enter Connection Details

• Host and Port: Complete ClickZetta instance and service host, with an optional port (for example, your-instance.clickzetta.com or your-instance.clickzetta.com:8443).
• Username: Username to connect to ClickZetta. It should have enough privileges to read all the metadata.
• Workspace: The ClickZetta workspace to ingest.
• Virtual Cluster: The ClickZetta virtual cluster used to run the metadata extraction queries.
• Password: Password to connect to ClickZetta.
• Database Schema: Optional schema restriction. When left blank, OpenMetadata attempts to scan all schemas.
• Query History Table: ClickZetta table or view used for usage and query-lineage extraction. It’s required for the Query Usage and Lineage agents, which fail if it’s unset. Set this to information_schema.job_history for workspace-local native history. Use sys.information_schema.job_history for cross-workspace native history. The connector maps the native columns from either source and scopes them to the configured workspace and schema. Custom tables or views must expose the following columns:
  • Query columns: query_text, query_type, user_name
  • Scope and timing columns: database_name, schema_name, start_time, end_time, duration, aborted, cost
• Protocol: Protocol used to connect to ClickZetta. Choose https (default) or http.

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Test Connection

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Step 5: Configure Ingestion Options

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How Filter Rules Work

• Contains: Matches any name containing the value. For example, sales matches my_sales_data and sales_2024.
• Starts with: Matches names beginning with the value. For example, prod_ matches prod_db and prod_schema.
• Ends with: Matches names ending with the value. For example, _raw matches events_raw and logs_raw.
• Is exactly: Matches the exact name only. For example, analytics matches only analytics.
• Matches regex: Matches names using a regular expression. For example, ^prod_.*_v\d+$ matches prod_events_v1.

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Filter Options

• Scan Mode: Choose one of the following scan modes:
  • Scan all: Ingests every asset of that type the connector can access. This is the default.
  • Only specific: Enables include rules so only assets matching at least one rule are ingested.
• Exclude system toggle: Use this toggle to automatically filter out system-reserved names defined by the connector, for example, Exclude system databases for the Databases section.
• Always exclude: Add permanent exclusion rules (shown in red). OpenMetadata never ingests assets matching these rules, regardless of include rules.
• Preview: View a real-time summary of what’s in scope based on your current rules.
• Include rules: In Only specific mode, click + Add to define a rule. Added rules appear as chips. OpenMetadata includes an asset if it matches any rule.

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Step 6: Create & Deploy

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Configure Metadata Agent and Schedule Ingestion

1. Navigate to Settings > Services and select the service type.
2. Click the service you have added.
3. Select the Agents tab and click Add Agent > Metadata. For some services, the dropdown is not available and clicking Add Agent takes you directly to the agent configuration page.
4. On the Configure Ingestion page, do the following and click Next.
   • Name this Ingestion: Enter a unique recognizable name for this ingestion pipeline.
   • Agent Setup: Configure core parameters for metadata extraction. The following fields are available:

     Field	Default	Description
     Default Owner	—	Owner applied to any entity that has no owner from a more specific field below. Accepts a user or a team, by name or email.
     Service Owner	—	Owner assigned to the service entity itself (the connector/service you’re setting up, not the data inside it).
     Database Owner	—	Owner assigned to every database this agent ingests. Accepts either one owner for all of them, or a mapping of specific owners per database.
     Database Schema Owner	—	Owner assigned to every schema this agent ingests. Accepts either one owner for all of them, or a mapping of specific owners per schema.
     Table Owner	—	Owner assigned to every table this agent ingests. Accepts either one owner for all of them, or a mapping of specific owners per table.
     Enable Inheritance	On	When on, an entity with no owner of its own inherits one from the nearest parent that has one, checked in this order: table, then schema, then database, then service, then Default Owner. Turn off if you want only the owners set explicitly above to apply, with no fallback.
     Query Log Duration	1	How many days of query logs to look back through when processing stored procedure results.
     Query Parsing Timeout Limit	300	How many seconds to spend parsing a single query before giving up on it and moving to the next. Raise this if large or complex queries are being skipped.
     Number of Threads	1	How many tables to ingest in parallel. Raising this can speed up ingestion on databases with many tables, at the cost of more load on the source.
     Incremental Extraction	Off	When on, a run extracts only entities that changed since the last successful run, instead of re-scanning everything every time. Faster on large, mostly unchanged databases.
     Successful Pipeline Run Lookback Days	7	Only used when Incremental Extraction is on. How many days back to search for a prior successful run to use as the starting point for what changed since then.
     Safety Margin Days	1	Only used when Incremental Extraction is on. Extra days added before that starting point, as a buffer so changes still in flight when the last run finished aren’t missed.
     Extract JSON Schema	Off	Sample values in JSON columns to infer and ingest their schema, so the individual fields inside a JSON column are visible in OpenMetadata rather than just “JSON”. Requires SELECT permission on the sampled tables. If that permission is missing, the JSON column is still ingested, just without a detailed schema.
     JSON Schema Sample Size	10	Only used when Extract JSON Schema is on. Number of rows sampled per JSON column to infer its schema. A larger sample gives more accurate results but takes longer to run.

     For more information about how the Default Owner, Service Owner, Database Owner, Database Schema Owner, Table Owner, and Enable Inheritance fields resolve an owner, see Hierarchical Owner Configuration.
   • Filter Patterns: Apply include or exclude rules to scope which databases, schemas, tables, and stored procedures this agent ingests. For more information about various filter options, see Step 6: Configure Ingestion Options.
   • Scope & Behaviour: Control how the agent handles metadata during ingestion. Toggle each option on or off based on your needs:

     Toggle	Default	Description
     Include Tables	On	Ingest tables and their columns. Turn off to skip tables entirely, for example if this agent exists only to pull tags or stored procedures.
     Include Tags	On	Ingest tags already defined on tables/columns in the source system (for example, a classification tag applied in Snowflake) and bring them into OpenMetadata as tags on the same assets.
     Include Stored Procedures	On	Ingest stored procedures as their own assets, so they show up in the catalog and can be linked into lineage.
     Include DDL Statements	Off	Also ingest the raw CREATE TABLE / CREATE VIEW statement for each asset, so it’s viewable in OpenMetadata alongside the asset’s metadata.
     Include Owners	Off	When an ingested asset’s owner in the source system is an email that matches an existing OpenMetadata user, assign that user as the asset’s owner. Never overwrites an owner an asset already has in OpenMetadata.
     Include Custom Properties	Off	Ingest source-specific metadata that doesn’t map to a standard OpenMetadata field (for example, a database-specific attribute) into custom properties on the asset, if custom properties have been defined for that entity type.
     Mark Deleted Tables	On	If a table this agent previously ingested no longer exists in the source, soft-delete it in OpenMetadata too. Only affects tables within schemas this agent actually scans.
     Mark Deleted Stored Procedures	On	Same as Mark Deleted Tables, but for stored procedures.
     Mark Deleted Schemas	Off	If an entire schema this agent previously ingested no longer exists in the source, soft-delete the schema and everything in it.
     Mark Deleted Databases	Off	If an entire database this agent previously ingested no longer exists in the source, soft-delete the database and everything in it.
     Override Metadata	Off	On: values from the source (descriptions, tags, owners, display names) always overwrite what’s currently in OpenMetadata, even if someone edited it there. Off: OpenMetadata only fills in fields that are still empty, so manual edits in OpenMetadata are preserved.
     Enable Debug Log	Off	Run this ingestion at DEBUG log verbosity instead of the normal level. Turn on when troubleshooting a failing or unexpected run. Leave off otherwise, since debug logs are much larger.

     Available toggles vary by connector. Stored procedure options only appear for connectors that support stored procedures.
     
   • Advanced Config: Driver-level options (connection arguments, scheme, and timeouts). Most connections never need these, and they vary by connector. This section also has one ingestion-scope toggle:

     Toggle	Default	Description
     Include Views	On	Ingest views in addition to tables. Turn off to skip views entirely. Since view lineage is derived from parsing each view’s SQL definition, turning this off also stops view-based lineage from being generated for this service.

     
5. On the Schedule Interval page, set when the agent runs:
   • Schedule: Choose a preset interval (Hourly, Daily, Weekly, Monthly) or enter a custom cron expression.
   • On-Demand: No automatic schedule; trigger the agent manually when needed.
   
6. Click Add to deploy the agent.

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