HFileExist (Function)

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HFileExist (Function)

In french: HFichierExiste

Determines:

if a data file exists, i.e. if it has been physically created (HCreation or HCreationIfNotFound).
Remark: The substitutions currently performed on the data file (by HSubstDir, HChangeDir and HChangeName) are taken into account.
whether a view or a query was defined.

Example

See additional examples

// Check whether the "Customer" data file exists
IF HFileExist(Customer) = True THEN
// Processes
...
END

// Check whether a Client/Server data file exists
IF HFileExist(MyConnection, "MyFile.FIC") = True THEN
// Processes
...
END

Syntax

Checking the existence of a data file, query or view Hide the details

<Result> = HFileExist([<Element>])

<Result>: Boolean

True if the physical file exists,
False otherwise.

<Element>: Optional character string

Name of the element to be used:
Name of data file.
Name of view or query.
If this name is not specified, HFileExist will use the last data file, query or view used by the last HFSQL management function (function starting with "H").

Checking the existence of a data file in HFSQL Client/Server Hide the details

<Result> = HFileExist(<Connection> , <Physical file>)

<Result>: Boolean

True if the physical data file exists on the server,
False otherwise.

<Connection>: Character string or Connection variable

Connection associated with the data file. This connection corresponds to:
the name of the connection defined in the data model editor or with HDescribeConnection or HOpenConnection.
the name of a variable of type Connection.

<Physical file>: Character string

Physical name of the searched data file. The file extension must be specified ("Customer.fic" for example).

Remarks

HFileExist can be used whether the file is open or closed.
HFileExist does not open the data file if it is closed.

Component: wd300hf.dll