HDescribeLink (Function)

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How to describe a link by programming?

List of HFSQL properties used to describe a link by programming

See also

ExecuteQueryAsynchronous

ExecuteSQLQueryAsynchronous

HCreateMoveableReplica

HCreateSubscriberReplica

HDeactivateAutoFilter

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HExecuteQuery

HExecuteQueryAsynchronous

HExecuteSQLQuery

HExecuteSQLQueryAsynchronous

HFilterIncludedBetween

HMigrateLinkedCompositeKey

HRecreateSubscriberReplica

How to describe a link by programming?
List of HFSQL properties used to describe a link by programming

WINDEV

WEBDEV

WINDEV Mobile

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See also

HDescribeLink (Function)

In french: HDécritLiaison

Not available with this kind of connection

Describes a link between two data files by programming.

After the call to HDescribeLink:

The description of the link is validated.
The link description cannot be modified anymore.
The variable for link description is reinitialized. A new link description can be done.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Remark: From version 19, HFSQL is the new name of HyperFileSQL.

Example

HDescribeLink(CustomerProductLink)

Syntax

<Result> = HDescribeLink(<Link>)

<Result>: Boolean

True if the operation was performed,
False if a problem occurred. HErrorInfo is used to identify the error.

<Link>: Link Description variable

Name of the Link description variable that corresponds to the link to create.

Remarks

How to describe a link by programming?

To describe a link by programming, you must:

Use the Link description variables.
Describe the characteristics of the link via the HFSQL properties.
Use HDescribeLink to save the description of the link.

Remark: To describe a data file by programming, use HDescribeFile. To describe items by programming, use HDescribeItem.

List of HFSQL properties used to describe a link by programming

The following properties are available in read/write.


DeletionRule	..DeletionRule is used to configure the deletion rule (integrity management) that will be applied to the data file described by programming.
LinkedFile	LinkedFile is used to configure the characteristics of a link.
LinkedKey	..LinkedKey is used to configure the characteristics of a link.
MaxLinkedCardinality	The Property Linked CardinalityMax allows to know and modify the maximum cardinality of the Item linked in the Link.
MaxSourceCardinality	The Property CardinalitySourceMax makes it possible to know and modify the maximum cardinality of the Item source in the Link.
MinLinkedCardinality	The Property Linked CardinalityMin allows to know and modify the minimum cardinality of the Item linked in the Link.
MinSourceCardinality	The Property CardinalitySourceMin makes it possible to know and modify the minimum cardinality of the Item source in the Link.
ModificationRule	The Property RuleModification is used to set up the rule of modification (integrity management) of the records to be applied to the HEX@ of data described by programming.
Name	Name is used to find out the name of the font associated with a Font variable. the name of a control, report or report block. the name of a control, group of controls or window. the name of a control, group of controls or page.
SourceFile	SourceFile is used to configure the characteristics of a link.
SourceKey	SourceKey is used to configure the characteristics of a link.

Component : wd260hf.dll