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---
title: postgres-upgrade-precheck
type: docs
weight: 11
description: Perform a pre-check for a Cloud SQL for PostgreSQL major version upgrade.
---
## About
The `postgres-upgrade-precheck` tool initiates a pre-check on a Cloud SQL for PostgreSQL
instance to assess its readiness for a major version upgrade using the Cloud SQL Admin API.
It helps identify potential incompatibilities or issues before starting the actual upgrade process.
## Compatible Sources
{{< compatible-sources >}}
## Example
```yaml
kind: tool
name: postgres-upgrade-precheck
type: postgres-upgrade-precheck
source: cloud-sql-admin-source
description: "Checks if a Cloud SQL PostgreSQL instance is ready for a major version upgrade to the specified target version."
```
## Reference
| **field** | **type** | **required** | **description** |
| ------------ | :------: | :----------: | --------------------------------------------------------- |
| type | string | true | Must be "postgres-upgrade-precheck". |
| source | string | true | The name of the `cloud-sql-admin` source to use. |
| description | string | false | A description of the tool. |
| **parameter** | **type** | **required** | **description** |
| ----------------------- | :------: | :----------: | ------------------------------------------------------------------------------- |
| project | string | true | The project ID containing the instance. |
| instance | string | true | The name of the Cloud SQL instance to check. |
| targetDatabaseVersion | string | false | The target PostgreSQL major version for the upgrade (e.g., `POSTGRES_18`). If not specified, defaults to the PostgreSQL 18. |