# BigQuery

## Authentication Methods

BigQuery connections support [OAuth](https://cloud.google.com/bigquery/docs/authorization#access_tokens). A refresh token is requested which does not expire.

## Supported Data Types

The following table describes the current mapping between BigQuery data types and Salesforce.

| BigQuery  | Corresponding Salesforce type                                                                                                                                                            |
| --------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| NUMERIC   | NUMBER\_TYPE if the precision is < 18, otherwise STRING\_SHORT\_TYPE                                                                                                                     |
| INT64     | NUMBER\_TYPE                                                                                                                                                                             |
| FLOAT64   | STRING\_SHORT\_TYPE, length 21                                                                                                                                                           |
| BINARY    | Not supported                                                                                                                                                                            |
| BOOLEAN   | <p>NUMBER\_TYPE</p><p><em>(not BOOLEAN\_TYPE, because NULL values wouldn't be supported)</em></p>                                                                                        |
| DATE      | <p>Dates are not supported by Salesforce Connect, but the adapter converts to DATETIME\_TYPE (at midnight) for convenience.</p><p>This makes them usable but potentially misleading.</p> |
| TIMESTAMP | DATETIME\_TYPE                                                                                                                                                                           |
| TIME      | STRING\_SHORT\_TYPE                                                                                                                                                                      |
| STRING    | STRING\_SHORT\_TYPE if the max length is <255, otherwise STRING\_LONG\_TYPE                                                                                                              |


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