azuredeploy_provision_throughput-conditional.json

{
  "type": "Microsoft.DocumentDB/databaseAccounts/apis/databases",
  "name": "[concat(variables('databaseAccountName'), '/sql/', variables('databaseName'))]",
  "apiVersion": "2016-03-31",
  "dependsOn": [ "[resourceId('Microsoft.DocumentDB/databaseAccounts/', variables('databaseAccountName'))]" ],
  "properties": {
    "resource": {
      "id": "[variables('databaseName')]"
    },
    "options": {
      "throughput": "[if(parameters('isUpdate'), json('null'), parameters('throughput'))]"
    }
  }
}