postgres_upgrade_precheck
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Checks if a Cloud SQL for PostgreSQL instance is ready for a major version upgrade to the
specified target version.
The target_database_version MUST be provided in the request (e.g., POSTGRES_15).
This tool helps identify potential issues *before*
attempting the actual upgrade, reducing the risk of failure or downtime.
This tool is only supported for PostgreSQL primary instances and does not run on read replicas.
The precheck typically evaluates:
- Database schema compatibility with the target version.
- Cloud SQL limitations and unsupported features.
- Instance resource constraints (e.g., number of relations).
- Compatibility of current database settings and extensions.
- Overall instance health and readiness.
This tool returns a long-running operation. Use the get_operation
tool with the operation name returned by this call to poll its status.
IMPORTANT: Once the operation status is DONE, the detailed precheck results are
available within the Operation resource. You will need to inspect
the response from get_operation. The findings are located in thepre_check_major_version_upgrade_context.pre_check_response field.
The findings are structured, indicating:
- INFO: General information.
- WARNING: Potential issues that don't block the upgrade but should be reviewed.
- ERROR: Critical issues that MUST be resolved before attempting the upgrade.
Each finding should include a message and any required actions. Addressing
any reported issues is crucial before proceeding with the major version upgrade.
If pre_check_response is empty or missing, it indicates that no issues were
identified during the precheck.
Running this precheck does not impact the instance's availability.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| body | any | yes | Required. The context for request to perform the pre-check major version upgrade operation. |
| instance | string | yes | Required. Cloud SQL instance ID. This does not include the project ID. |
| location | string | no | Optional. Region of the Cloud SQL instance. |
| project | string | yes | Required. Project ID of the project that contains the instance. |
Raw JSON schema
{
"$defs": {
"InstancesPreCheckMajorVersionUpgradeRequest": {
"description": "Request for Pre-checks for MVU",
"properties": {
"preCheckMajorVersionUpgradeContext": {
"$ref": "#/$defs/PreCheckMajorVersionUpgradeContext",
"description": "Required. Contains details about the pre-check major version upgrade operation."
}
},
"required": [
"preCheckMajorVersionUpgradeContext"
],
"type": "object"
},
"PreCheckMajorVersionUpgradeContext": {
"description": "Pre-check major version upgrade context.",
"properties": {
"kind": {
"description": "Optional. This is always `sql#preCheckMajorVersionUpgradeContext`.",
"type": "string"
},
"preCheckResponse": {
"description": "Output only. The responses from the precheck operation.",
"items": {
"$ref": "#/$defs/PreCheckResponse"
},
"readOnly": true,
"type": "array"
},
"targetDatabaseVersion": {
"description": "Required. The target database version to upgrade to.",
"enum": [
"SQL_DATABASE_VERSION_UNSPECIFIED",
"MYSQL_5_1",
"MYSQL_5_5",
"MYSQL_5_6",
"MYSQL_5_7",
"MYSQL_8_0",
"MYSQL_8_0_18",
"MYSQL_8_0_26",
"MYSQL_8_0_27",
"MYSQL_8_0_28",
"MYSQL_8_0_29",
"MYSQL_8_0_30",
"MYSQL_8_0_31",
"MYSQL_8_0_32",
"MYSQL_8_0_33",
"MYSQL_8_0_34",
"MYSQL_8_0_35",
"MYSQL_8_0_36",
"MYSQL_8_0_37",
"MYSQL_8_0_39",
"MYSQL_8_0_40",
"MYSQL_8_0_41",
"MYSQL_8_0_42",
"MYSQL_8_0_43",
"MYSQL_8_0_44",
"MYSQL_8_0_45",
"MYSQL_8_0_46",
"MYSQL_8_4",
"MYSQL_9_7",
"SQLSERVER_2017_STANDARD",
"SQLSERVER_2017_ENTERPRISE",
"SQLSERVER_2017_EXPRESS",
"SQLSERVER_2017_WEB",
"POSTGRES_9_6",
"POSTGRES_10",
"POSTGRES_11",
"POSTGRES_12",
"POSTGRES_13",
"POSTGRES_14",
"POSTGRES_15",
"POSTGRES_16",
"POSTGRES_17",
"POSTGRES_18",
"POSTGRES_19",
"POSTGRES_20",
"SQLSERVER_2019_STANDARD",
"SQLSERVER_2019_ENTERPRISE",
"SQLSERVER_2019_EXPRESS",
"SQLSERVER_2019_WEB",
"SQLSERVER_2022_STANDARD",
"SQLSERVER_2022_ENTERPRISE",
"SQLSERVER_2022_EXPRESS",
"SQLSERVER_2022_WEB",
"SQLSERVER_2025_STANDARD",
"SQLSERVER_2025_ENTERPRISE",
"SQLSERVER_2025_EXPRESS"
],
"type": "string",
"x-google-enum-deprecated": [
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"x-google-enum-descriptions": [
"This is an unknown database version.",
"The database version is MySQL 5.1.",
"The database version is MySQL 5.5.",
"The database version is MySQL 5.6.",
"The database version is MySQL 5.7.",
"The database version is MySQL 8.",
"The database major version is MySQL 8.0 and the minor version is 18.",
"The database major version is MySQL 8.0 and the minor version is 26.",
"The database major version is MySQL 8.0 and the minor version is 27.",
"The database major version is MySQL 8.0 and the minor version is 28.",
"The database major version is MySQL 8.0 and the minor version is 29.",
"The database major version is MySQL 8.0 and the minor version is 30.",
"The database major version is MySQL 8.0 and the minor version is 31.",
"The database major version is MySQL 8.0 and the minor version is 32.",
"The database major version is MySQL 8.0 and the minor version is 33.",
"The database major version is MySQL 8.0 and the minor version is 34.",
"The database major version is MySQL 8.0 and the minor version is 35.",
"The database major version is MySQL 8.0 and the minor version is 36.",
"The database major version is MySQL 8.0 and the minor version is 37.",
"The database major version is MySQL 8.0 and the minor version is 39.",
"The database major version is MySQL 8.0 and the minor version is 40.",
"The database major version is MySQL 8.0 and the minor version is 41.",
"The database major version is MySQL 8.0 and the minor version is 42.",
"The database major version is MySQL 8.0 and the minor version is 43.",
"The database major version is MySQL 8.0 and the minor version is 44.",
"The database major version is MySQL 8.0 and the minor version is 45.",
"The database major version is MySQL 8.0 and the minor version is 46.",
"The database version is MySQL 8.4.",
"The database version is MySQL 9.7.",
"The database version is SQL Server 2017 Standard.",
"The database version is SQL Server 2017 Enterprise.",
"The database version is SQL Server 2017 Express.",
"The database version is SQL Server 2017 Web.",
"The database version is PostgreSQL 9.6.",
"The database version is PostgreSQL 10.",
"The database version is PostgreSQL 11.",
"The database version is PostgreSQL 12.",
"The database version is PostgreSQL 13.",
"The database version is PostgreSQL 14.",
"The database version is PostgreSQL 15.",
"The database version is PostgreSQL 16.",
"The database version is PostgreSQL 17.",
"The database version is PostgreSQL 18.",
"The database version is PostgreSQL 19.",
"The database version is PostgreSQL 20.",
"The database version is SQL Server 2019 Standard.",
"The database version is SQL Server 2019 Enterprise.",
"The database version is SQL Server 2019 Express.",
"The database version is SQL Server 2019 Web.",
"The database version is SQL Server 2022 Standard.",
"The database version is SQL Server 2022 Enterprise.",
"The database version is SQL Server 2022 Express.",
"The database version is SQL Server 2022 Web.",
"The database version is SQL Server 2025 Standard.",
"The database version is SQL Server 2025 Enterprise.",
"The database version is SQL Server 2025 Express."
]
}
},
"required": [
"targetDatabaseVersion"
],
"type": "object"
},
"PreCheckResponse": {
"description": "Structured PreCheckResponse containing message, type, and required actions.",
"properties": {
"actionsRequired": {
"description": "The actions that the user needs to take. Use repeated for multiple actions.",
"items": {
"type": "string"
},
"type": "array"
},
"message": {
"description": "The message to be displayed to the user.",
"type": "string"
},
"messageType": {
"description": "The type of message whether it is an info, warning, or error.",
"enum": [
"MESSAGE_TYPE_UNSPECIFIED",
"INFO",
"WARNING",
"ERROR"
],
"type": "string",
"x-google-enum-descriptions": [
"Default unspecified value to prevent unintended behavior changes.",
"General informational messages that don't require action.",
"Warnings that might impact the upgrade but don't block it.",
"Errors that a user must resolve before proceeding with the upgrade."
]
}
},
"type": "object"
}
},
"description": "Request for Pre-checks for MVU",
"properties": {
"body": {
"$ref": "#/$defs/InstancesPreCheckMajorVersionUpgradeRequest",
"description": "Required. The context for request to perform the pre-check major version upgrade operation."
},
"instance": {
"description": "Required. Cloud SQL instance ID. This does not include the project ID.",
"type": "string"
},
"location": {
"description": "Optional. Region of the Cloud SQL instance.",
"type": "string"
},
"project": {
"description": "Required. Project ID of the project that contains the instance.",
"type": "string"
}
},
"required": [
"instance",
"project",
"body"
],
"type": "object"
}