IssueTracker

Please provide as much information as possible. At least, this should include a description of your issue and steps to reproduce the problem. If possible please provide a summary of what steps or workarounds you have already tried, and any docs or articles you found (un)helpful.

Problem you have encountered:
An error should be displayed to tell the user that no change was made while manually updating a BigQuery table.


What you expected to happen:
the shema does not actually change and does not inform the user, more visibility would be nice

Steps to reproduce:
Reproduction steps:  
1. Create a table

bq load tapad-paas-elias-create-t2:test1.test1_tbl data.csv schema.json

schema.json -

[
{
"name": "name",
"type": "STRING",
"mode": "REQUIRED"
},
{
"name": "value",
"type": "STRING",
"mode": "NULLABLE"
}
]

2. Acquire the table using deployment manager

gcloud deployment-manager deployments update deployment-manager-schema-update-test --config ./deployment-manger-table.yaml --project tapad-paas-elias-create-t2

deployment-manger-table.yam -
resources:
- name: deployment-manager-schema-update-test
type: bigquery.v2.table
properties:
tableReference:
datasetId: test1
projectId: tapad-paas-elias-create-t2
tableId: test1_tbl
description: table description
datasetId: test1
schema:
fields:
- name: "name"
type: "STRING"
mode: "REQUIRED"
- name: "value"
type: "STRING"
mode: "REQUIRED"
timePartitioning:
type: DAY
expirationMs: '2592000000'

Other information (workarounds you have tried, documentation consulted, etc):