![]() |
![]() |
![]() |
GNOME Data Access 3.0 manual | ![]() |
---|---|---|---|---|
GdaDataModelHashGdaDataModelHash — An implementation of GdaDataModel based on a hash table |
GdaDataModelHash; GdaDataModelHashClass; GdaDataModelHashPrivate; GdaDataModel* gda_data_model_hash_new (gint cols); void gda_data_model_hash_insert_row (GdaDataModelHash *model, gint rownum, GdaRow *row); void gda_data_model_hash_set_n_columns (GdaDataModelHash *model, gint cols); void gda_data_model_hash_clear (GdaDataModelHash *model);
Unlike GdaDataModelArray, this data model implementation stores the GdaRow in a hash table. So it only retrieves from the database backend exactly the requested rows (while in GdaDataModelArray you have to retrieve all the rows until the one requested).
GdaDataModel* gda_data_model_hash_new (gint cols);
|
number of columns for rows in this data model. |
Returns : |
a pointer to the newly created GdaDataModel. |
void gda_data_model_hash_insert_row (GdaDataModelHash *model, gint rownum, GdaRow *row);
Inserts a row
in the model
.
|
the GdaDataModelHash which is gonna hold the row. |
|
the number of the row. |
|
the row to insert. The model is responsible for freeing it with g_object_unref() .
|
void gda_data_model_hash_set_n_columns (GdaDataModelHash *model, gint cols);
Sets the number of columns for rows inserted in this model.
cols
must be greater than or equal to 0.
Also clears model
's contents.
This function calls gda_data_model_hash_clear to free the existing rows if any.
|
the GdaDataModelHash. |
|
the number of columns for rows inserted in model .
|
void gda_data_model_hash_clear (GdaDataModelHash *model);
Frees all the rows inserted in model
.
|
the model to clear. |