Bigquery add columns to table schema

Question

I am trying to add new column to BigQuery existing table. I have tried bq command tool and API approach. I get following error when making call to Tables.update().

Answer 1

I was stuck trying to add columns to an existing table in BigQuery using the Python client and found this post several times. I'll then let the piece of code that solved it for me, in case someone's having the same problem:

# update table schema
bigquery_client = bigquery.Client()
dataset_ref = bigquery_client.dataset(dataset_id)
table_ref = dataset_ref.table(table_id)
table = bigquery_client.get_table(table_ref)
new_schema = list(table.schema)
new_schema.append(bigquery.SchemaField('LOLWTFMAN','STRING'))
table.schema = new_schema
table = bigquery_client.update_table(table, ['schema'])  # API request