## GdaDictFunction GdaDictFunction — Represents a function in the DBMS. |

## Synopsis

                        GdaDictFunction;
    GObject*            gda_dict_function_new               (GdaDict *dict);
    void                gda_dict_function_set_dbms_id       (GdaDictFunction *func,
                                                             const gchar *id);
    gchar*              gda_dict_function_get_dbms_id       (GdaDictFunction *func);
    void                gda_dict_function_set_sqlname       (GdaDictFunction *func,
                                                             const gchar *sqlname);
    const gchar*        gda_dict_function_get_sqlname       (GdaDictFunction *func);
    void                gda_dict_function_set_arg_dict_types
                                                            (GdaDictFunction *func,
                                                             const GSList *arg_types);
    const GSList*       gda_dict_function_get_arg_dict_types
                                                            (GdaDictFunction *func);
    void                gda_dict_function_set_ret_dict_type (GdaDictFunction *func,
                                                             GdaDictType *dt);
    GdaDictType*        gda_dict_function_get_ret_dict_type (GdaDictFunction *func);
    gboolean            gda_dict_function_accepts_arg_dict_types
                                                            (GdaDictFunction *func,
                                                             const GSList *arg_types);

## Object Hierarchy

      GObject
       +----GdaObject
             +----GdaDictFunction

## Implemented Interfaces

GdaDictFunction implements GdaXmlStorage.

## Description

The GdaDictFunction represents a function, it has zero or more input parameters, and one and only one return type. In this way it does not represent procedures which does not return any data type. Also the argument types are always of the IN kind (no OUT or IN OUT kinds); there may one day be a specific object for procedures. It does not either represent a function returning a SET OF a given data type; there may on day be a specific object for such functions.

Because functions 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 a function.

It implements the GdaXmlStorage interface.

## Details

### GdaDictFunction

    typedef struct _GdaDictFunction GdaDictFunction;

### gda_dict_function_new ()

    GObject*            gda_dict_function_new               (GdaDict *dict);

Creates a new GdaDictFunction object which rrpresents a function in the dictionary

`dict` : | a GdaDict object
Returns : | the new object

### gda_dict_function_set_dbms_id ()

    void                gda_dict_function_set_dbms_id       (GdaDictFunction *func,
                                                             const gchar *id);

Set the DBMS identifier of the function

`func` : | a GdaDictFunction object
`id` : | the DBMS identifier

### gda_dict_function_get_dbms_id ()

    gchar*              gda_dict_function_get_dbms_id       (GdaDictFunction *func);

Get the DBMS identifier of the function

`func` : | a GdaDictFunction object
Returns : | a new string with the function's id

### gda_dict_function_set_sqlname ()

    void                gda_dict_function_set_sqlname       (GdaDictFunction *func,
                                                             const gchar *sqlname);

Set the SQL name of the data type.

`func` : | a GdaDictFunction object
`sqlname` : |

### gda_dict_function_get_sqlname ()

    const gchar*        gda_dict_function_get_sqlname       (GdaDictFunction *func);

Get the DBMS's name of a data type.

`func` : | a GdaDictFunction object
Returns : | the name of the data type

### gda_dict_function_set_arg_dict_types ()

    void                gda_dict_function_set_arg_dict_types
                                                            (GdaDictFunction *func,
                                                             const GSList *arg_types);

Set the arguments types of a function

`func` : | a GdaDictFunction object
`arg_types` : | a list of GdaDictType objects or NULL values ordered to represent the data types of the function's arguments .

### gda_dict_function_get_arg_dict_types ()

    const GSList*       gda_dict_function_get_arg_dict_types
                                                            (GdaDictFunction *func);

To consult the list of arguments types (and number) of a function.

`func` : | a GdaDictFunction object
Returns : | a list of GdaDictType objects, the list MUST NOT be modified.

### gda_dict_function_set_ret_dict_type ()

    void                gda_dict_function_set_ret_dict_type (GdaDictFunction *func,
                                                             GdaDictType *dt);

Set the return type of a function

`func` : | a GdaDictFunction object
`dt` : | a GdaDictType object or NULL

### gda_dict_function_get_ret_dict_type ()

    GdaDictType*        gda_dict_function_get_ret_dict_type (GdaDictFunction *func);

To consult the return type of a function.

`func` : | a GdaDictFunction object
Returns : | a GdaDictType object.

### gda_dict_function_accepts_arg_dict_types ()

    gboolean            gda_dict_function_accepts_arg_dict_types
                                                            (GdaDictFunction *func,
                                                             const GSList *arg_types);

Test if the proposed list of arguments (`arg_types`) would be accepted by the `func` function.

The non acceptance can be beause of data type incompatibilities or a wrong number of data types.

`func` : | a GdaDictFunction object
`arg_types` : | a list of GdaDictType objects or NULL values, ordered
Returns : | TRUE if accepted