<Source>.ListLink (Function)

ONLINE HELP
WINDEV, WEBDEV AND WINDEV MOBILE

Version:

Home | Sign in | English

Help / WLanguage / Managing databases / HFSQL / HFSQL functions

Deletion and modification rule

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

<Source>.ListLink (Function)

In french: <Source>.ListeLiaison

Not available with this kind of connection

Returns the list of a data file links (Merise type) present.:

in the current analysis,
New in version 2024
in ongoing analyses (case of projects with multiple analyses).
in a specific analysis.

Example

// Récupérer les liaisons du fichier de données Client de l'analyse en cours
ListeLiaison est une chaîne
ListeLiaison = Client.ListeLiaison(HLstDétail)
// Ajoute la liste des liaisons dans le champ COMBO_MaCombo
COMBO_MaCombo.Ajoute(ListeLiaison)

Syntax

Listing the links of a data file in an analysis Hide the details

<Result> = <Source>.ListLink([<Path of the WDD file> [, <Password of the WDD file>]] [, <Options>])

<Result>: Character string

List of links.
New in version 2024
Projects with multiple analyses: If several analyses are in progress, all links of all analyses in progress are listed (without duplicates).
The different link descriptions are separated by CR characters (Carriage Return). The result is more or less detailed depending on the constant used:
hLstDetail is not specified <Name link1> + TAB + <Name file1.1> + TAB + <Name item1.1> + TAB + <Cardinality 1.1> + TAB + <Name file1.2> + TAB + <Name item1.2> + TAB + <Cardinality 1.2> + CR +...
hLstDetail is specified <Name link1> + TAB + <Name file1.1> + TAB + <Name item1.1> + TAB + <Cardinality 1.1> + TAB + <Name file1.2> + TAB + <Name item1.2> + TAB + <Cardinality 1.2> + TAB + <Modification rule> + TAB + <Deletion rule> + CR +...

Where:
<Name link X>: link name.
<Name file x.1>:: Name of the data file related to the primary key.
<Name item x.1>: Name of the item related to the primary key or name of the specified data file.
<Cardinality x.1>: Cardinality of the link related to the primary key in the following format: "<Min cardinality>, <Max cardinality>" ("0, N" or "1, N" for example).
<Name file x.2>: Name of the data file related to the foreign key.
<Name item x.2>: Name of the item related to the foreign key.
<Cardinality x.2>: Cardinality of the link related to the foreign key in the following format: "<Min cardinality>, <Max cardinality>" ("0, N" or "1, N" for example).
<Modification rule>: Rule to apply if the primary key is modified.
<Deletion rule>: Rule to apply if the primary key is deleted.
The name of data files corresponds to the name of the database + '\' + the relative physical name of these data files.
If one of the listed links is performed in a composite key, the <Name item 1.2> parameter returned will correspond to the name of the different key components. The names will be separated by a comma.

<Source>: Type corresponding to the specified source

Name of the data file whose links must be listed. The links originating from this file or ending at this file are listed.

<Path of the WDD file>: Optional character string

Full path of the analysis file (.WDD file).
If this parameter is not specified or is equal to an empty string (""), links are searched for:
in the current analysis.
New in version 2024
in all current analyses (case of projects with multiple analyses).

<Password of the WDD file>: Optional character string

Password defined for the analysis. If no password is defined, this parameter must be equal to an empty string ("").

<Options>: Optional integer constant

Type of list to perform:
hLstDetail Lists the detailed information about the links.
hLstNormal
(default value) Lists the links.
This parameter is ignored.

Listing the links of a data file accessible via Native Connector or OLE DB, or via an HFSQL Client/Server connection Hide the details

<Result> = <Source>.ListLink([<Connection>] [, <Options>])

<Result>: Character string

List of links. The different link descriptions are separated by CR characters (Carriage Return). The result is more or less detailed depending on the constant used:
hLstDetail is not specified <Name link1> + TAB + <Name file1.1> + TAB + <Name item1.1> + TAB + <Cardinality 1.1> + TAB + <Name file1.2> + TAB + <Name item1.2> + TAB + <Cardinality 1.2> + CR +...
hLstDetail is specified <Name link1> + TAB + <Name file1.1> + TAB + <Name item1.1> + TAB + <Cardinality 1.1> + TAB + <Name file1.2> + TAB + <Name item1.2> + TAB + <Cardinality 1.2> + TAB + <Modification rule> + TAB + <Deletion rule> + CR +...

Where:
<Name link X>: link name.
<Name file x.1>:: Name of the data file related to the primary key.
<Name item x.1>: Name of the item related to the primary key or name of the specified data file.
<Cardinality x.1>: Cardinality of the link related to the primary key in the following format: "<Min cardinality>, <Max cardinality>" ("0, N" or "1, N" for example).
<Name file x.2>: Name of the data file related to the foreign key.
<Name item x.2>: Name of the item related to the foreign key.
<Cardinality x.2>: Cardinality of the link related to the foreign key in the following format: "<Min cardinality>, <Max cardinality>" ("0, N" or "1, N" for example).
<Modification rule>: Rule to apply if the primary key is modified (see Remarks).
<Deletion rule>: Rule to apply if the primary key is deleted (see Remarks).
The name of data files corresponds to the name of the database + '\' + the relative physical name of these data files.
If one of the listed links is performed in a composite key, the <Name item 1.2> parameter returned will correspond to the name of the different key components. The names will be separated by a comma.

<Source>: Type corresponding to the specified source

Name of the data file whose links must be listed. The links originating from this file or ending at this file are listed.

<Connection>: Character string or Connection variable

Connection to use. This connection corresponds to:
the name of the connection defined in the data model editor or with HDescribeConnection or <Connection variable>.OpenConnection.
the name of a variable of type Connection.

<Options>: Optional integer constant

Type of list to perform:
hLstDetail Lists the detailed information about the links.
hLstNormal
(default value) Lists the links.
This parameter is ignored.

Remarks

Deletion and modification rule

The modification and deletion rules returned by <Source>.ListLink can correspond to the following constants:


hIntegrityCascade	Manage the cascading modification and deletion.
hIntegrityDefaultValue	During the deletion, a default value is assigned to the linked records.
hIntegrityForbidden	Strict respect of integrity.
hIntegrityNone	No integrity constraint.

Component: wd290hf.dll