LogiView

Command 'select'

This command is used to specify the database table fields to be selected in a catenated Select instruction ('select', 'where', 'order_by', 'exec_select') and defines the variables to assign these field contents.

This command must not be called with a conditional instruction.

Syntax:

select({VAR_LIST})

I/O parameters:

{VAR_LIST)

List of variables that are to be assigned values. For the specified variables a database access must be defined (in the "variable list" mask) describing the allocation of a variable to a certain table field.

In this case the specification of a Where clause in a database access definition of the variable is ignored; for this purpose the command 'where' is available for catenated Select instructions.

The database access of the forwarded variables (with no limitation of the number) is used to determine which table fields to select.

The database access can also relate to fields of serveral tables (join selection).

Return value:

Example:

Declaration of Variables

10 select (DOCU_STRING_1_DB)
20 where ("T_MASTER_DAT.PART_ID"="TEST%")
30 RES=exec_select(1)
40 put(DOCU_STRING_1_DB)

Result:

A selection menu with all item IDs starting with "TEST" is displayed. After selecting an option the name of the item is displayed.

Functions and commands: DB/Mask Interface