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danrega
2024-06-20 16:58:20 +02:00
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01_Internal_Tables.md
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@@ -1835,7 +1835,47 @@ it_ref = NEW #( ).
## Grouping Internal Tables
Find more information in the [Internal Tables: Grouping](11_Internal_Tables_Grouping.md) cheat sheet and a code snippet in the [Constructor Expressions](05_Constructor_Expressions.md#grouping-lines-in-internal-tables-with-valuereduce) cheat sheet.
To group internal tables, there are additions for both `LOOP AT` statements and constructor expressions. Find more information in the [Internal Tables: Grouping](11_Internal_Tables_Grouping.md) cheat sheet and a code snippet in the [Constructor Expressions](05_Constructor_Expressions.md#grouping-lines-in-internal-tables-with-valuereduce) cheat sheet.
In the following example, an internal table is sorted and looped over using groups. The goal is to transfer a line from the original table to another table of the same type. This line has the highest value in component `b` among all lines that are grouped by component `a`.
```abap
TYPES: BEGIN OF demo_struct,
a TYPE c LENGTH 1,
b TYPE i,
END OF demo_struct,
tab_type TYPE TABLE OF demo_struct WITH EMPTY KEY.
DATA(it1) = VALUE tab_type( ( a = 'a' b = 1 )
( a = 'b' b = 5 )
( a = 'a' b = 3 )
( a = 'b' b = 4 )
( a = 'a' b = 2 )
( a = 'b' b = 6 )
( a = 'c' b = 10 )
( a = 'd' b = 0 )
( a = 'd' b = 7 )
( a = 'a' b = 4 )
( a = 'e' b = 11 )
( a = 'e' b = 111 ) ).
DATA it2 LIKE it1.
SORT it1 BY a ASCENDING b DESCENDING.
LOOP AT it1 INTO DATA(wa) GROUP BY wa-a.
LOOP AT GROUP wa INTO DATA(member).
APPEND member TO it2.
EXIT.
ENDLOOP.
ENDLOOP.
"Content of it2:
*A B
*a 4
*b 6
*c 10
*d 7
*e 111
```
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