Function PreparedImpl.queryRow
Execute a prepared SQL SELECT command where you only want the first Row (if any).
If the SQL command does not produce a result set (such as INSERT/CREATE/etc),
then mysql will be thrown. Use
exec instead for such commands.
If there are long data items among the expected result columns you can use the csa param to specify that they are to be subject to chunked transfer via a delegate.
Prototype
std
ColumnSpecialization[] csa = null
);
Parameters
| Name | Description |
|---|---|
| csa | An optional array of ColumnSpecialization structs. |
Returns
Nullable!Row: This will be null (check via Nullable.isNull) if the query resulted in an empty result set.