Make the lookup rule visible in the declaration
The dispatch identifier is unique in this example. Declaring it as the table’s key records that assumption in the type and makes key-based access clear to a reader.
Declare the table contract
TYPES ty_dispatches TYPE HASHED TABLE OF ty_dispatch
WITH UNIQUE KEY dispatch_id.An explicit key can catch duplicate identifiers when inserting and supports direct key lookup. If duplicates are valid, use a suitable non-unique key and a table category that preserves that requirement. Do not mark a field unique just because it is usually unique in a small test sample.
For a standard table used only as a sequence, WITH EMPTY KEY avoids an accidental standard key built from character-like fields. For sorted or hashed access, define the fields your business lookup actually uses. A table key is an in-memory access contract; it does not create a database constraint.
Sources
Developer practice · ABAP
Practice: declare a keyed dispatch table
Define a dispatch row and a hashed internal table whose unique primary key is dispatch_id.
This choice changes the output pattern checked here: WRITE belongs in a classic executable report, while out->write( ) uses the supplied output reference in an ABAP Cloud class-run method. It does not switch the language version of the other code; check release and API availability in your target system.
Complete the task and include the output statement shown for your selected environment. Variable names can differ if you use them consistently. This browser checker checks structure only; it does not compile or run ABAP.
0 required structures detected · 0 checks
Write your solution, then check its structure.
One possible solution
TYPES: BEGIN OF ty_dispatch,
dispatch_id TYPE string,
carrier TYPE string,
status TYPE string,
END OF ty_dispatch.
TYPES ty_dispatches TYPE HASHED TABLE OF ty_dispatch WITH UNIQUE KEY dispatch_id.
DATA(result) = 'The business identifier is the unique key'.
WRITE result.out->write( result ).These are context-specific output examples. In your own program, use the result variable from your solution and the output mechanism available in that program.