BigQueryToMsSqlOperator

Google

Fetches the data from a BigQuery table (alternatively fetch data for selected columns) and insert that data into a MSSQL table.

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Last Updated: Feb. 11, 2023

Access Instructions

Install the Google provider package into your Airflow environment.

Import the module into your DAG file and instantiate it with your desired params.

Parameters

Documentation

Connections

Parameters

source_project_dataset_tableRequiredA dotted ..: the big query table of origin

selected_fieldsList of fields to return (comma-separated). If unspecified, all fields are returned.

gcp_conn_idreference to a specific Google Cloud hook.

delegate_toThe account to impersonate using domain-wide delegation of authority, if any. For this to work, the service account making the request must have domain-wide delegation enabled.

mssql_conn_idreference to a specific mssql hook

databasename of database which overwrite defined one in connection

replaceWhether to replace instead of insert

batch_sizeThe number of rows to take in each batch

locationThe location used for the operation.

impersonation_chainOptional service account to impersonate using short-term credentials, or chained list of accounts required to get the access_token of the last account in the list, which will be impersonated in the request. If set as a string, the account must grant the originating account the Service Account Token Creator IAM role. If set as a sequence, the identities from the list must grant Service Account Token Creator IAM role to the directly preceding identity, with first account from the list granting this role to the originating account (templated).

Documentation

Fetches the data from a BigQuery table (alternatively fetch data for selected columns) and insert that data into a MSSQL table.

Note

If you pass fields to selected_fields which are in different order than the order of columns already in BQ table, the data will still be in the order of BQ table. For example if the BQ table has 3 columns as [A,B,C] and you pass ‘B,A’ in the selected_fields the data would still be of the form 'A,B' and passed through this form to MSSQL

Example:

transfer_data = BigQueryToMsSqlOperator(
     task_id='task_id',
     source_project_dataset_table='my-project.mydataset.mytable',
     mssql_table='dest_table_name',
     replace=True,
 )