void
table_base::remove_where(const abstract_predicate &pred) const {
if (a_priori_false(pred)) return;
const unique_ptr<sql> cmd = clone(_sql_delete);
if (! a_priori_true(pred))
cmd->write_where(pred);
_database.get_session()->exec(*cmd);
}
unique_ptr<sql>
table_base::sql_update(
const abstract_mapper_base &dest,
const Src &src,
const abstract_predicate &pred,
const abstract_mapper_base *returning
) const {
if (! is_subset(dest.columns(), _value_mapper.columns()))
throw outside_table_exception(_binomen);
unique_ptr<sql> cmd = _database.make_sql();
cmd->write_update(_binomen, dest, src, readback_id());
if (! a_priori_true(pred)) cmd->write_where(pred);
if (returning != nullptr) cmd->write_returning(*returning);
return cmd;
}
void
sql::write_where(const abstract_predicate &pred) {
assert (! a_priori_true(pred));
write(" WHERE ");
write_evaluation(predicate(pred));
}
