omni-query（全方位查询）

Omni Query

Run queries against Omni's semantic layer via the Omni CLI. Omni translates field selections into optimized SQL — you specify what you want (dimensions, measures, filters), not how to get it.

Tip: Use omni-model-explorer first if you don't know the available topics and fields.

Prerequisites

# Verify the Omni CLI is installed — if not, ask the user to install it
# See: https://github.com/exploreomni/cli#readme
command -v omni >/dev/null || echo "ERROR: Omni CLI is not installed."

# Show available profiles and select the appropriate one
omni config show
# If multiple profiles exist, ask the user which to use, then switch:
omni config use <profile-name>

You also need a model ID and knowledge of available topics and fields.

Discovering Commands

omni query --help              # List query operations
omni query run --help          # Show flags for running a query
omni ai --help                 # AI-powered query generation

Tip: Use -o json to force structured output for programmatic parsing, or -o human for readable tables. The default is auto (human in a TTY, JSON when piped).

Running a Query

Basic Query

omni query run --body '{
  "query": {
    "modelId": "your-model-id",
    "table": "order_items",
    "fields": [
      "order_items.created_at[month]",
      "order_items.total_revenue"
    ],
    "limit": 100,
    "join_paths_from_topic_name": "order_items"
  }
}'

Query Parameters

Field Naming

Fields use view_name.field_name. Date fields support timeframe brackets:

users.created_at[date]      — Daily
users.created_at[week]      — Weekly
users.created_at[month]     — Monthly
users.created_at[quarter]   — Quarterly
users.created_at[year]      — Yearly

Sorts

"sorts": [
  { "column_name": "order_items.total_revenue", "sort_descending": true }
]

Filters

"filters": {
  "order_items.created_at": "last 90 days",
  "order_items.status": "complete",
  "users.state": "California,New York"
}

Expressions: "last 90 days", "this quarter", "2024-01-01 to 2024-12-31", "not California", "null", "not null", ">100", "between 10 and 100", "contains sales", "starts with A". See references/filter-expressions.md for the complete expression syntax reference.

Pivots

{
  "query": {
    "fields": ["order_items.created_at[month]", "order_items.status", "order_items.count"],
    "pivots": ["order_items.status"],
    "join_paths_from_topic_name": "order_items"
  }
}

Handling and Validating Results

Default response: base64-encoded Apache Arrow table. Arrow results are binary — you cannot parse individual row data from the raw response. To verify a query returned data, check summary.row_count in the response.

For human-readable results, request CSV instead:

{ "query": { ... }, "resultType": "csv" }

Result Validation

Every query response should be checked before trusting the results or presenting them to the user.

Check for errors:

• If the response contains an error key, the query failed. Common causes: bad field name, missing join path, malformed filter expression, permission error.
• If the response contains remaining_job_ids, the query is still running — poll with omni query wait before checking results.

Check row count:

• summary.row_count == 0 — the query returned no data. This may be valid (e.g., no data in the filter range) but is worth flagging to the user. Common causes: overly restrictive filters, wrong date range, field that doesn't match any rows.
• summary.row_count equals the limit you set — results may be truncated. If the user needs complete data, re-run with a higher limit or null for unlimited.

Spot-check data with CSV:

When accuracy matters, request CSV and scan the output:

omni query run --body '{
  "query": { ... },
  "resultType": "csv"
}'

Check that:

• Column headers match the fields you requested
• Values are in expected ranges (e.g., revenue isn't negative, dates aren't in the future)
• Aggregations make sense (e.g., a count isn't returning a sum)

Validate filter behavior:

If your query includes filters, verify they're being applied:

# Run the same query without filters
omni query run --body '{ "query": { ... (no filters) ... }, "resultType": "csv" }'

# Compare row counts — filtered should be <= unfiltered

If both queries return the same row count, the filter may not be binding (wrong field name, unsupported expression, or the known bug where boolean filters are dropped with pivots).

Validation Checklist

Decoding Arrow Results

import base64, pyarrow as pa
arrow_bytes = base64.b64decode(response["data"])
reader = pa.ipc.open_stream(arrow_bytes)
df = reader.read_all().to_pandas()

Long-Running Queries

If the response includes remaining_job_ids, poll until complete:

omni query wait --jobids job-id-1,job-id-2

Running Queries from Dashboards

Extract and re-run queries powering existing dashboards:

# Get all queries from a dashboard
omni documents get-queries <dashboardId>

# Run as a specific user
omni query run --body '{ "query": { ... }, "userId": "user-uuid-here" }'

# Cache policy (valid values: Standard, SkipRequery, SkipCache)
omni query run --body '{ "query": { ... }, "cache": "SkipCache" }'

AI-Powered Query Generation

Instead of constructing query JSON manually, you can describe what you want in natural language and let Omni's AI generate the query.

Generate Query (synchronous)

The fastest path — returns a generated query JSON synchronously. Pass --run-query false to get only the query structure without executing it (default runs the query).

# Just generate the query JSON (no execution)
omni ai generate-query your-model-id "Show me revenue by month" --run-query false

Response:

{
  "query": {
    "fields": ["order_items.created_at[month]", "order_items.total_revenue"],
    "table": "order_items",
    "filters": {},
    "sorts": [{"column_name": "order_items.created_at[month]", "sort_descending": false}],
    "limit": 500
  },
  "topic": "order_items",
  "error": null
}

# Generate and execute in one call
omni ai generate-query your-model-id "Top 10 customers by lifetime spend"

Optional flags:

• --branch-id — test against a specific model branch
• --current-topic-name — constrain topic selection to a specific topic

Pick Topic

Check which topic the AI would select for a question, without generating a full query:

omni ai pick-topic your-model-id "How many users signed up last month?"

Agentic Queries (async)

For the full Blobby experience — multi-step analysis, tool use, and topic selection as the AI would actually behave in production. This is async: submit a job, poll for status, then retrieve the result.

# 1. Submit a job
omni ai job-submit your-model-id "Analyze revenue trends and identify our fastest growing product category"
# → returns { "jobId": "job-uuid", "conversationId": "conv-uuid" }

# 2. Poll for completion (QUEUED → EXECUTING → COMPLETE)
omni ai job-status <jobId>

# 3. Get the result
omni ai job-result <jobId>

The result contains an actions array with each step the AI took — look for actions with type: "generate_query" to extract the generated queries. The response also includes resultSummary with the AI's narrative interpretation.

Additional job commands:

• omni ai job-cancel <jobId> — cancel a running job
• omni ai job-visualization <jobId> — get the visualization output

When to Use Which Approach

Multi-Step Analysis Pattern

For complex analysis, chain queries:

1. Broad query — understand the shape of the data
2. Inspect results — identify interesting segments or patterns
3. Focused follow-ups — filter based on findings
4. Synthesize — combine results into a narrative

Common Query Patterns

Time Series: fields + date dimension + ascending sort + date filter

Top N: fields + metric + descending sort + limit

Aggregation with Breakdown: multiple dimensions + multiple measures + descending sort by key metric

Known Bugs

• IS_NOT_NULL filter generates IS NULL (reported Omni bug) — workaround: invert the filter logic or use the base view to apply the filter differently.
• Boolean filters may be silently dropped when a pivots array is present — if boolean filters aren't applying, remove the pivot and test again.

Linking to Results

Queries are ephemeral — there is no persistent URL for a query result. To give the user a shareable link:

• For existing dashboards: {OMNI_BASE_URL}/dashboards/{identifier} (the identifier comes from the document API response)
• For new analysis: Create a document via omni-content-builder with the query as a queryPresentation, then share {OMNI_BASE_URL}/dashboards/{identifier}

Docs Reference

• Query API · Running Document Queries · Querying Documentation · Filter Syntax

Related Skills

• omni-model-explorer — discover fields and topics before querying
• omni-content-explorer — find dashboards whose queries you can extract
• omni-content-builder — turn query results into dashboards
• omni-ai-eval — benchmark and test AI query generation accuracy