The DatasetId used to resolve unqualified tables.

データ型

string

デフォルト値

""

解説

When a query refers to a table it can leave the dataset implicit, or qualify the dataset directly as the schema portion of the table:

/* Implicit, resolved against connection string */
SELECT FirstName, LastName FROM `customers`

/* Explicit, dataset specified as schema */
SELECT FirstName, LastName FROM `psychic-valve-137816`.`Northwind`.`customers`

Any unqualified table references in the query are resolved using the following rules. Note that only method 1 is supported when QueryPassthrough is enabled. This means that passthrough queries must set this property or qualify all tables.

1. If this property is set then the specified dataset is used.
2. Otherwise the schema from the first table in the query is used. In the following query the `orders` table is treated as if it comes from the Northwind dataset.

SELECT ... FROM `psychic-valve-137816`.`Northwind`.`customers`
INNER JOIN `orders`
ON ...