GdaServerProvider: GNOME Data Access 5 manual

## GdaServerProvider GdaServerProvider — Base class for all the DBMS providers |

## Stability Level

Stable, unless otherwise indicated

## Functions

void | (*GdaServerProviderAsyncCallback) ()
void | (*GdaServerProviderExecCallback) ()
const gchar * | gda_server_provider_get_name ()
const gchar * | gda_server_provider_get_version ()
const gchar * | gda_server_provider_get_server_version ()
gboolean | gda_server_provider_supports_operation ()
GdaServerOperation * | gda_server_provider_create_operation ()
gchar * | gda_server_provider_render_operation ()
gboolean | gda_server_provider_perform_operation ()
GdaSqlParser * | gda_server_provider_create_parser ()
gboolean | gda_server_provider_supports_feature ()
GdaDataHandler * | gda_server_provider_get_data_handler_g_type ()
GdaDataHandler * | gda_server_provider_get_data_handler_dbms ()
GValue * | gda_server_provider_string_to_value ()
gchar * | gda_server_provider_value_to_sql_string ()
const gchar * | gda_server_provider_get_default_dbms_type ()
gchar * | gda_server_provider_escape_string ()
gchar * | gda_server_provider_unescape_string ()

## Types and Values

| GdaServerProvider
| GdaServerProviderClass
enum | GdaServerProviderError
#define | GDA_SERVER_PROVIDER_ERROR
| GdaServerProviderMeta

## Object Hierarchy

        GObject
        ╰── GdaServerProvider
            ╰── GdaSqliteProvider

## Includes

    #include <virtual/gda-ldap-connection.h>

## Description

The GdaServerProvider class is a virtual class which all the DBMS providers must inherit, and implement its virtual methods.

See the Virtual methods for providers section for more information about how to implement the virtual methods.

## Functions

### GdaServerProviderAsyncCallback ()

    void
    (*GdaServerProviderAsyncCallback) (GdaServerProvider *provider,
                                       GdaConnection *cnc,
                                       guint task_id,
                                       gboolean result_status,
                                       const GError *error,
                                       gpointer data);

Function to be called by Libgda when the associated asynchronous method invoked finishes.

### GdaServerProviderExecCallback ()

    void
    (*GdaServerProviderExecCallback) (GdaServerProvider *provider,
                                      GdaConnection *cnc,
                                      guint task_id,
                                      GObject *result_obj,
                                      const GError *error,
                                      gpointer data);

Function to be called by Libgda when the associated asynchronous method invoked finishes

### gda_server_provider_get_name ()

    const gchar *
    gda_server_provider_get_name (GdaServerProvider *provider);

Get the name (identifier) of the provider

#### Parameters

provider | a GdaServerProvider object. |

#### Returns

a string containing the provider's name.

[transfer none]

### gda_server_provider_get_version ()

    const gchar *
    gda_server_provider_get_version (GdaServerProvider *provider);

Get the version of the provider.

#### Parameters

provider | a GdaServerProvider object. |

#### Returns

a string containing the version identification.

[transfer none]

### gda_server_provider_get_server_version ()

    const gchar *
    gda_server_provider_get_server_version
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc);

Get the version of the database to which the connection is opened.

#### Parameters

provider | a GdaServerProvider object. |
cnc | a GdaConnection object |

#### Returns

a (read only) string, or `NULL` if an error occurred.

[transfer none]

### gda_server_provider_supports_operation ()

    gboolean
    gda_server_provider_supports_operation
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc,
                                    GdaServerOperationType type,
                                    GdaSet *options);

Tells if `provider` supports the `type` of operation on the `cnc` connection, using the (optional) `options` parameters.

#### Parameters

provider | a GdaServerProvider object |
cnc | a GdaConnection object which would be used to perform an action, or `NULL`. | [allow-none]
type | the type of operation requested |
options | a list of named parameters, or `NULL`. | [allow-none]

#### Returns

`TRUE` if the operation is supported

### gda_server_provider_create_operation ()

    GdaServerOperation *
    gda_server_provider_create_operation (GdaServerProvider *provider,
                                          GdaConnection *cnc,
                                          GdaServerOperationType type,
                                          GdaSet *options,
                                          GError **error);

Creates a new GdaServerOperation object which can be modified in order to perform the `type` type of action. The `options` can contain:

- named values which ID is a path in the resulting GdaServerOperation object, to initialize some value
- named values which may change the contents of the GdaServerOperation, see this section for more information

#### Parameters

provider | a GdaServerProvider object |
cnc | a GdaConnection object which will be used to perform an action, or `NULL`. | [allow-none]
type | the type of operation requested |
options | a list of parameters or `NULL`. | [allow-none]
error | a place to store an error, or `NULL`. | [allow-none]

#### Returns

a new GdaServerOperation object, or `NULL` in the provider does not support the `type` type of operation or if an error occurred.

[transfer full][allow-none]

### gda_server_provider_render_operation ()

    gchar *
    gda_server_provider_render_operation (GdaServerProvider *provider,
                                          GdaConnection *cnc,
                                          GdaServerOperation *op,
                                          GError **error);

Creates an SQL statement (possibly using some specific extensions of the DBMS) corresponding to the `op` operation. Note that the returned string may actually contain more than one SQL statement.

This function's purpose is mainly informative to get the actual SQL code which would be executed to perform the operation; to actually perform the operation, use `gda_server_provider_perform_operation()`.

#### Parameters

provider | a GdaServerProvider object |
cnc | a GdaConnection object which will be used to render the action, or `NULL`. | [allow-none]
op | a GdaServerOperation object |
error | a place to store an error, or `NULL`. | [allow-none]

#### Returns

a new string, or `NULL` if an error occurred or operation cannot be rendered as SQL.

[transfer full][allow-none]

### gda_server_provider_perform_operation ()

    gboolean
    gda_server_provider_perform_operation (GdaServerProvider *provider,
                                           GdaConnection *cnc,
                                           GdaServerOperation *op,
                                           GError **error);

Performs the operation described by `op` . Note that `op` is not destroyed by this method and can be reused.

#### Parameters

provider | a GdaServerProvider object |
cnc | a GdaConnection object which will be used to perform the action, or `NULL`. | [allow-none]
op | a GdaServerOperation object |
error | a place to store an error, or `NULL`. | [allow-none]

#### Returns

`TRUE` if no error occurred

### gda_server_provider_create_parser ()

    GdaSqlParser *
    gda_server_provider_create_parser (GdaServerProvider *provider,
                                       GdaConnection *cnc);

Creates a new GdaSqlParser object which is adapted to `provider` (and possibly depending on `cnc` for the actual database version).

If `prov` does not have its own parser, then `NULL` is returned, and a general SQL parser can be obtained using `gda_sql_parser_new()`.

#### Parameters

provider | a GdaServerProvider provider object |
cnc | a GdaConnection, or `NULL`. | [allow-none]

#### Returns

a new GdaSqlParser object, or `NULL`.

[transfer full]

### gda_server_provider_supports_feature ()

    gboolean
    gda_server_provider_supports_feature (GdaServerProvider *provider,
                                          GdaConnection *cnc,
                                          GdaConnectionFeature feature);

Tests if a feature is supported

#### Parameters

provider | a GdaServerProvider object |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
feature | GdaConnectionFeature feature to test |

#### Returns

`TRUE` if `feature` is supported

### gda_server_provider_get_data_handler_g_type ()

    GdaDataHandler *
    gda_server_provider_get_data_handler_g_type
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc,
                                    GType for_type);

Find a GdaDataHandler object to manipulate data of type `for_type` . The returned object must not be modified.

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
for_type | a GType |

#### Returns

a GdaDataHandler, or `NULL` if the provider does not support the requested `for_type` data type.

[transfer none]

### gda_server_provider_get_data_handler_dbms ()

    GdaDataHandler *
    gda_server_provider_get_data_handler_dbms
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc,
                                    const gchar *for_type);

Find a GdaDataHandler object to manipulate data of type `for_type` .

Note: this function is currently very poorly implemented by database providers.

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
for_type | a DBMS type definition |

#### Returns

a GdaDataHandler, or `NULL` if the provider does not know about the `for_type` type.

[transfer none]

### gda_server_provider_string_to_value ()

    GValue *
    gda_server_provider_string_to_value (GdaServerProvider *provider,
                                         GdaConnection *cnc,
                                         const gchar *string,
                                         GType preferred_type,
                                         gchar **dbms_type);

Use `provider` to create a new GValue from a single string representation.

The `preferred_type` can optionally ask `provider` to return a GValue of the requested type (but if such a value can't be created from `string` , then `NULL` is returned); pass G_TYPE_INVALID if any returned type is acceptable.

The returned value is either a new GValue or `NULL` in the following cases:

- `string` cannot be converted to `preferred_type` type

- the provider does not handle `preferred_type`

- the provider could not make a GValue from `string`

If `dbms_type` is not `NULL`, then if will contain a constant string representing the database type used for the conversion if the conversion was successfull, or `NULL` otherwise.

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
string | the SQL string to convert to a value |
preferred_type | a GType, or G_TYPE_INVALID |
dbms_type | place to get the actual database type used if the conversion succeeded, or `NULL`. | [allow-none]

#### Returns

a new GValue, or `NULL`.

[transfer full]

### gda_server_provider_value_to_sql_string ()

    gchar *
    gda_server_provider_value_to_sql_string
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc,
                                    GValue *from);

Produces a fully quoted and escaped string from a GValue

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
from | GValue to convert from |

#### Returns

escaped and quoted value or NULL if not supported.

[transfer full]

### gda_server_provider_get_default_dbms_type ()

    const gchar *
    gda_server_provider_get_default_dbms_type
                                   (GdaServerProvider *provider,
                                    GdaConnection *cnc,
                                    GType type);

Get the name of the most common data type which has `type` type.

The returned value may be `NULL` either if the provider does not implement that method, or if there is no DBMS data type which could contain data of the `g_type` type (for example `NULL` may be returned if a DBMS has integers only up to 4 bytes and a G_TYPE_INT64 is requested).

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object or `NULL`. | [allow-none]
type | a GType value type |

#### Returns

the name of the DBMS type, or `NULL`.

[transfer none][allow-none]

### gda_server_provider_escape_string ()

    gchar *
    gda_server_provider_escape_string (GdaServerProvider *provider,
                                       GdaConnection *cnc,
                                       const gchar *str);

Escapes `str` for use within an SQL command (to avoid SQL injection attacks). Note that the returned value still needs to be enclosed in single quotes before being used in an SQL statement.

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
str | a string to escape |

#### Returns

a new string suitable to use in SQL statements.

[transfer full]

### gda_server_provider_unescape_string ()

    gchar *
    gda_server_provider_unescape_string (GdaServerProvider *provider,
                                         GdaConnection *cnc,
                                         const gchar *str);

Unescapes `str` for use within an SQL command. This is the exact opposite of `gda_server_provider_escape_string()`.

#### Parameters

provider | a server provider. |
cnc | a GdaConnection object, or `NULL`. | [allow-none]
str | a string to escape |

#### Returns

a new string.

[transfer full]

## Types and Values

### GdaServerProvider

    typedef struct _GdaServerProvider GdaServerProvider;

### GdaServerProviderClass

    typedef struct {
    	GObjectClass parent_class;

    	/* provider information */
    	GThread                 * limiting_thread; /* if not NULL, then using the provider will be limited to this thread */
    	const gchar           *(* get_name)              (GdaServerProvider *provider);
    	const gchar           *(* get_version)           (GdaServerProvider *provider);
    	const gchar           *(* get_server_version)    (GdaServerProvider *provider, GdaConnection *cnc);
    	gboolean               (* supports_feature)      (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaConnectionFeature feature);
    	/* types and values manipulation */
    	GdaDataHandler        *(* get_data_handler)      (GdaServerProvider *provider, GdaConnection *cnc,
    							  GType g_type, const gchar *dbms_type);
    	const gchar           *(*get_def_dbms_type)      (GdaServerProvider *provider, GdaConnection *cnc, GType g_type);
    	gchar                 *(*escape_string)          (GdaServerProvider *provider, GdaConnection *cnc, const gchar *str);
    	gchar                 *(*unescape_string)        (GdaServerProvider *provider, GdaConnection *cnc, const gchar *str);

    	/* connections management */
    	gboolean               (* open_connection)       (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaQuarkList *params, GdaQuarkList *auth,
    							  guint *task_id, GdaServerProviderAsyncCallback async_cb,
    							  gpointer cb_data);
    	gboolean               (* close_connection)      (GdaServerProvider *provider, GdaConnection *cnc);

    	const gchar           *(* get_database)          (GdaServerProvider *provider, GdaConnection *cnc);

    	/* operations */
    	gboolean               (* supports_operation)    (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaServerOperationType type, GdaSet *options);
    	GdaServerOperation    *(* create_operation)      (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaServerOperationType type, GdaSet *options, GError **error);
    	gchar                 *(* render_operation)      (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaServerOperation *op, GError **error);
    	gboolean               (* perform_operation)     (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaServerOperation *op,
    							  guint *task_id, GdaServerProviderAsyncCallback async_cb,
    							  gpointer cb_data, GError **error);

    	/* transactions */
    	gboolean                (* begin_transaction)    (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GdaTransactionIsolation level, GError **error);
    	gboolean                (* commit_transaction)   (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GError **error);
    	gboolean                (* rollback_transaction) (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GError **error);
    	gboolean                (* add_savepoint)        (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GError **error);
    	gboolean                (* rollback_savepoint)   (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GError **error);
    	gboolean                (* delete_savepoint)     (GdaServerProvider *provider, GdaConnection *cnc,
    							  const gchar *name, GError **error);

    	/* GdaStatement */
    	GdaSqlParser           *(* create_parser)        (GdaServerProvider *provider, GdaConnection *cnc);

    	/**
    	 * statement_to_sql:
    	 * @cnc: a #GdaConnection object
    	 * @stmt: a #GdaStatement object
    	 * @params: (allow-none): a #GdaSet object (which can be obtained using gda_statement_get_parameters()), or %NULL
    	 * @flags: SQL rendering flags, as #GdaStatementSqlFlag OR'ed values
    	 * @params_used: (allow-none) (element-type Gda.Holder) (out) (transfer container): a place to store the list of individual #GdaHolder objects within @params which have been used
    	 * @error: a place to store errors, or %NULL
    	 *
    	 * Renders @stmt as an SQL statement, adapted to the SQL dialect used by @cnc
    	 *
    	 * Returns: a new string, or %NULL if an error occurred
    	 */
    	gchar                  *(* statement_to_sql)     (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaStatement *stmt, GdaSet *params, GdaStatementSqlFlag flags,
    							  GSList **params_used, GError **error);
    	gboolean                (* statement_prepare)    (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaStatement *stmt, GError **error);
    	GObject                *(* statement_execute)    (GdaServerProvider *provider, GdaConnection *cnc,
    							  GdaStatement *stmt, GdaSet *params,
    							  GdaStatementModelUsage model_usage,
    							  GType *col_types, GdaSet **last_inserted_row,
    							  guint *task_id, GdaServerProviderExecCallback exec_cb,
    							  gpointer cb_data, GError **error);

    	/* Misc */
    	gboolean                (* is_busy)              (GdaServerProvider *provider, GdaConnection *cnc, GError **error);
    	gboolean                (* cancel)               (GdaServerProvider *provider, GdaConnection *cnc,
    							  guint task_id, GError **error);
    	GdaConnection          *(* create_connection)    (GdaServerProvider *provider);

    	/* meta data reporting */
    	GdaServerProviderMeta      meta_funcs;

    	/* distributed transaction */
    	GdaServerProviderXa       *xa_funcs; /* it is a pointer! => set to %NULL if unsupported by provider */

    	/* SQL identifiers quoting */
    	gchar                  *(* identifier_quote)    (GdaServerProvider *provider, GdaConnection *cnc,
    							 const gchar *id,
    							 gboolean for_meta_store, gboolean force_quotes);

    	/* Async. handling */
    	gboolean                (*handle_async)         (GdaServerProvider *provider, GdaConnection *cnc, GError **error);

    	GdaSqlStatement        *(*statement_rewrite)    (GdaServerProvider *provider, GdaConnection *cnc,
    							 GdaStatement *stmt, GdaSet *params, GError **error);
    } GdaServerProviderClass;

### enum GdaServerProviderError

#### Members

GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR |  |
GDA_SERVER_PROVIDER_PREPARE_STMT_ERROR |  |
GDA_SERVER_PROVIDER_EMPTY_STMT_ERROR |  |
GDA_SERVER_PROVIDER_MISSING_PARAM_ERROR |  |
GDA_SERVER_PROVIDER_STATEMENT_EXEC_ERROR |  |
GDA_SERVER_PROVIDER_OPERATION_ERROR |  |
GDA_SERVER_PROVIDER_INTERNAL_ERROR |  |
GDA_SERVER_PROVIDER_BUSY_ERROR |  |
GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR |  |
GDA_SERVER_PROVIDER_SERVER_VERSION_ERROR |  |
GDA_SERVER_PROVIDER_DATA_ERROR |  |
GDA_SERVER_PROVIDER_DEFAULT_VALUE_HANDLING_ERROR |  |
GDA_SERVER_PROVIDER_MISUSE_ERROR |  |
GDA_SERVER_PROVIDER_FILE_NOT_FOUND_ERROR |  |

### GDA_SERVER_PROVIDER_ERROR

    #define             GDA_SERVER_PROVIDER_ERROR

### GdaServerProviderMeta

    typedef struct {
    	/* _information_schema_catalog_name */
    	gboolean (*_info)            (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);

    	/* _builtin_data_types */
    	gboolean (*_btypes)          (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);

    	/* _udt */
    	gboolean (*_udt)             (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*udt)              (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *udt_catalog, const GValue *udt_schema);

    	/* _udt_columns */
    	gboolean (*_udt_cols)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*udt_cols)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *udt_catalog, const GValue *udt_schema, const GValue *udt_name);

    	/* _enums */
    	gboolean (*_enums)           (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*enums)            (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *udt_catalog, const GValue *udt_schema, const GValue *udt_name);

    	/* _domains */
    	gboolean (*_domains)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*domains)          (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *domain_catalog, const GValue *domain_schema);

    	/* _domain_constraints */
    	gboolean (*_constraints_dom) (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*constraints_dom)  (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *domain_catalog, const GValue *domain_schema, const GValue *domain_name);

    	/* _element_types */
    	gboolean (*_el_types)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*el_types)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *specific_name);

    	/* _collations */
    	gboolean (*_collations)       (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*collations)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				       const GValue *collation_catalog, const GValue *collation_schema,
    				       const GValue *collation_name_n);

    	/* _character_sets */
    	gboolean (*_character_sets)  (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*character_sets)   (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *chset_catalog, const GValue *chset_schema, const GValue *chset_name_n);

    	/* _schemata */
    	gboolean (*_schemata)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*schemata)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *catalog_name, const GValue *schema_name_n);

    	/* _tables or _views */
    	gboolean (*_tables_views)    (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*tables_views)     (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name_n);

    	/* _columns */
    	gboolean (*_columns)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*columns)          (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name);

    	/* _view_column_usage */
    	gboolean (*_view_cols)       (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*view_cols)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *view_catalog, const GValue *view_schema, const GValue *view_name);

    	/* _table_constraints */
    	gboolean (*_constraints_tab) (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*constraints_tab)  (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name,
    				      const GValue *constraint_name_n);

    	/* _referential_constraints */
    	gboolean (*_constraints_ref) (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*constraints_ref)  (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name,
    				      const GValue *constraint_name);

    	/* _key_column_usage */
    	gboolean (*_key_columns)     (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*key_columns)      (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name,
    				      const GValue *constraint_name);

    	/* _check_column_usage */
    	gboolean (*_check_columns)   (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*check_columns)    (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name,
    				      const GValue *constraint_name);

    	/* _triggers */
    	gboolean (*_triggers)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*triggers)         (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name);

    	/* _routines */
    	gboolean (*_routines)       (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*routines)        (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				     const GValue *routine_catalog, const GValue *routine_schema,
    				     const GValue *routine_name_n);

    	/* _routine_columns */
    	gboolean (*_routine_col)     (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*routine_col)      (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *rout_catalog, const GValue *rout_schema, const GValue *rout_name);

    	/* _parameters */
    	gboolean (*_routine_par)     (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*routine_par)      (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *rout_catalog, const GValue *rout_schema, const GValue *rout_name);
    	/* _table_indexes */
    	gboolean (*_indexes_tab)     (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*indexes_tab)      (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name,
    				      const GValue *index_name_n);

    	/* _index_column_usage */
    	gboolean (*_index_cols)      (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error);
    	gboolean (*index_cols)       (GdaServerProvider *prov, GdaConnection *cnc, GdaMetaStore *meta, GdaMetaContext *ctx, GError **error,
    				      const GValue *table_catalog, const GValue *table_schema, const GValue *table_name, const GValue *index_name);
    } GdaServerProviderMeta;

These methods must be implemented by providers to update a connection's associated metadata (in a GdaMetaStore object), see the Virtual methods for providers/Methods - metadata for more information.

## See Also

GdaConnection