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MgServerAggregate — Represents an aggregate in the DBMS (like COUNT()
or AVG()
for example)
struct MgServerAggregate; guint mg_server_aggregate_get_type (void); GObject* mg_server_aggregate_new (MgServer *srv); void mg_server_aggregate_set_dbms_id (MgServerAggregate *agg, const gchar *id); const gchar* mg_server_aggregate_get_dbms_id (MgServerAggregate *agg); void mg_server_aggregate_set_sqlname (MgServerAggregate *agg, const gchar *sqlname); const gchar* mg_server_aggregate_get_sqlname (MgServerAggregate *agg); void mg_server_aggregate_set_arg_type (MgServerAggregate *agg, MgServerDataType *dt); MgServerDataType* mg_server_aggregate_get_arg_type (MgServerAggregate *agg); void mg_server_aggregate_set_ret_type (MgServerAggregate *agg, MgServerDataType *dt); MgServerDataType* mg_server_aggregate_get_ret_type (MgServerAggregate *agg);
"templ-signal" void user_function (MgServerAggregate *mgserveraggregate, gpointer user_data);
Because aggregates can be polymorphic, the name is not enough to identify them, so the DBMS provides a unique id which can be used to uniquely identify an aggregate.
It implements the MgXmlStorage interface.
GObject* mg_server_aggregate_new (MgServer *srv);
Creates a new MgServerAggregate object
srv : | a MgServer object |
Returns : | the new object |
void mg_server_aggregate_set_dbms_id (MgServerAggregate *agg, const gchar *id);
Set the DBMS identifier of the aggregate
agg : | a MgServerAggregate object |
id : | the DBMS identifier |
const gchar* mg_server_aggregate_get_dbms_id (MgServerAggregate *agg);
Get the DBMS identifier of the aggregate
agg : | a MgServerAggregate object |
Returns : | the aggregate's id |
void mg_server_aggregate_set_sqlname (MgServerAggregate *agg, const gchar *sqlname);
Set the SQL name of the data type.
agg : | a MgServerAggregate object |
sqlname : |
const gchar* mg_server_aggregate_get_sqlname (MgServerAggregate *agg);
Get the DBMS's name of a data type.
agg : | a MgServerAggregate object |
Returns : | the name of the data type |
void mg_server_aggregate_set_arg_type (MgServerAggregate *agg, MgServerDataType *dt);
Set the argument type of a aggregate
agg : | a MgServerAggregate object |
dt : | a MgServerDataType objects or NULL value to represent the data type of the aggregate's unique argument . |
MgServerDataType* mg_server_aggregate_get_arg_type (MgServerAggregate *agg);
To consult the list of arguments types (and number) of a aggregate.
agg : | a MgServerAggregate object |
Returns : | a list of MgServerDataType objects, the list MUST NOT be modified. |
void mg_server_aggregate_set_ret_type (MgServerAggregate *agg, MgServerDataType *dt);
Set the return type of a aggregate
agg : | a MgServerAggregate object |
dt : | a MgServerDataType object or NULL |
MgServerDataType* mg_server_aggregate_get_ret_type (MgServerAggregate *agg);
To consult the return type of a aggregate.
agg : | a MgServerAggregate object |
Returns : | a MgServerDataType object. |
void user_function (MgServerAggregate *mgserveraggregate, gpointer user_data);
mgserveraggregate : | the object which received the signal. |
user_data : | user data set when the signal handler was connected. |
<< MgServerFunction | Objects related to the database structure >> |