4D Doc Center : EXPORT ODBC

4D v13.4

EXPORT ODBC


EXPORT ODBC ( sourceTable {; project {; *}} )

Parameter	Type	Description
sourceTable	String	Name of table in ODBC data source
project	BLOB	Contents of export project
		New contents of export project (if * is passed)
*	Operator	Display of export dialog box and project update

Description

The EXPORT ODBC command is used to export data in the sourceTable table of an external ODBC source.

If you call the EXPORT ODBC command outside of a connection opened previously using the SQL LOGIN command, the ODBC data source selection dialog box is displayed:

Windows

Mac OS

If the user clicks Cancel in this dialog box, execution is stopped and the system variable OK is set to 0.

Note: This command cannot be used in the case of connections with the internal SQL kernel of 4D.

If you do not pass the optional project parameter, 4D displays the ODBC export dialog box, which allows the user to configure the operation. For more information about this dialog box, refer to the Design Reference manual.

If you pass a BLOB containing a valid ODBC export project in the project parameter, the export will be carried out directly, without any user intervention. To do this, you simply need to load a project that has been saved on disk beforehand into the field or the BLOB variable that you pass in the project parameter, using the DOCUMENT TO BLOB command. ODBC export projects are saved via the ODBC export dialog box.

You can also use the EXPORT ODBC command with an empty project parameter and the optional * parameter, then store the project parameter in a BLOB field (see below). On the one hand, this solution lets you store the project with the data file and, on the other, to avoid the phase of loading it from the disk into a BLOB.

Note: Refer to the EXPORT DATA command for an example concerning the definition of an empty project. Please note that projects generated in the ODBC export dialog box are not compatible with the commands or the standard export dialog box of 4D.

The optional * parameter, if it is set, displays the ODBC data export dialog box with the settings defined in project (if any). This allows you to use a predefined project while still being able to modify one or more parameters. Moreover, in this case, the project parameter contains the parameters of the “new” project after the dialog box is closed. You can then store it in a BLOB field, in a file on disk, etc.

System variables and sets

If the user clicks Cancel in either of the two dialog boxes (for selecting the data source or the export settings), the system variable OK is set to 0. If the export is carried out correctly, the system variable OK is set to 1.