DoUpdate<T extends Table, D> constructor
DoUpdate<T extends Table, D> (
- Insertable<
D> update(- T old
- List<
Column> ? target, - Expression<
bool?> where(- T old
Creates a DO UPDATE
clause.
The update
function will be used to construct an Insertable used to
update an old row that prevented an insert.
If you need to refer to both the old row and the row that would have
been inserted, use DoUpdate.withExcluded.
The optional where
clause can be used to disable the update based on
the old value. If a where
clause is set and it evaluates to false, a
conflict will keep the old row without applying the update.
For an example, see InsertStatement.insert.
Implementation
DoUpdate(Insertable<D> Function(T old) update,
{this.target, Expression<bool?> Function(T old)? where})
: _creator = ((old, _) => update(old)),
_where = where == null ? null : ((old, _) => Where(where(old))),
_usesExcludedTable = false;