# Preview Parquet types before BigQuery loading

**Use case:** 

Synthetic required INT64 and nullable STRING columns; metadata only, no data pages or loading guarantee. Demo has no Actor event charge. Post-run data access may cost extra. For real mode, turn demo off, confirm permission and supply your own inputs. Useful receipts cost $0.05. Inputs may persist.

## Input

```json
{
  "demo": true,
  "processingPermission": false
}
```

## Output

```json
{
  "status": {
    "label": "Status",
    "format": "string"
  },
  "reason": {
    "label": "Reason",
    "format": "text"
  },
  "outcome": {
    "label": "Outcome",
    "format": "string"
  },
  "useful": {
    "label": "Useful",
    "format": "boolean"
  },
  "example": {
    "label": "Example",
    "format": "boolean"
  },
  "files": {
    "label": "Files",
    "format": "array"
  },
  "findings": {
    "label": "Findings",
    "format": "array"
  },
  "coverage": {
    "label": "Coverage",
    "format": "array"
  }
}
```

## How it works

### 1. Sign up on Apify or log in

The BigQuery Parquet Preflight Actor is ready to run with the inputs already set for "Preview Parquet types before BigQuery loading". [Sign up or log in](https://console.apify.com/create-task-from-example/DpKIswLpbkK6uOtJJ) and you'll land in Apify Console with a copy of this exact task.

### 2. Start the "Preview Parquet types before BigQuery loading" task

The BigQuery Parquet Preflight Actor will start running based on the input automatically. You can also change all the input fields, like synthetic demo and i am authorized to process these files, to match your specific use case.

### 3. Receive the "Preview Parquet types before BigQuery loading" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as status, reason, outcome, and more.

### 4. Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also [run the "Preview Parquet types before BigQuery loading" task via API](https://apify.com/l3digital/bigquery-parquet-preflight.md).

## About this Actor

This example demonstrates how to use [BigQuery Parquet Preflight](https://apify.com/l3digital/bigquery-parquet-preflight.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/l3digital/bigquery-parquet-preflight.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

This Task's input is already configured above. Use it as-is rather than inventing a new one.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/l3digital/bigquery-parquet-preflight.md

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).