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GNOME Data Access manual | ![]() |
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Top | Description |
GdaSelectGdaSelect — Filtering data from GdaDataModel |
GdaSelectPrivate; GdaDataModel * gda_select_new (void); void gda_select_add_source (GdaSelect *sel, const gchar *name, GdaDataModel *source); void gda_select_set_sql (GdaSelect *sel, const gchar *sql); gboolean gda_select_run (GdaSelect *sel);
GdaDataModel * gda_select_new (void);
Creates a new GdaSelect object, which allows programs to filter GdaDataModel's based on a given SQL SELECT command.
A GdaSelect is just another GdaDataModel-based class, so it can be used in the same way any other data model class is.
Returns : |
the newly created object. |
void gda_select_add_source (GdaSelect *sel, const gchar *name, GdaDataModel *source);
Adds a data model as a source of data for the GdaSelect object. When the select object is run (via gda_select_run), it will parse the SQL and get the required data from the source data models.
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a GdaSelect object. |
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name to identify the data model (usually a table name). |
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a GdaDataModel from which to get data. |
void gda_select_set_sql (GdaSelect *sel, const gchar *sql);
Sets the SQL command to be used on the given GdaSelect object for filtering rows from the source data model (which is set with gda_select_set_source).
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a GdaSelect object. |
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the SQL command to be used for filtering rows. |
gboolean gda_select_run (GdaSelect *sel);
Runs the query and fills in the GdaSelect object with the rows that matched the SQL command (which can be set with gda_select_set_sql) associated with this GdaSelect object.
After calling this function, if everything is successful, the GdaSelect object will contain the matched rows, which can then be accessed like a normal GdaDataModel.
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a GdaSelect object. |
Returns : |
TRUE if successful, FALSE if there was an error.
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