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danrega
2023-06-29 15:43:51 +02:00
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06_Dynamic_Programming.md
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@@ -90,8 +90,7 @@ ENDLOOP.
> **💡 Note**<br>
>- After its declaration, a field symbol is initial, i. e. a memory area is not (yet) assigned to it (apart from the inline declaration). If you use an unassigned field symbol, an exception is raised.
>- There are plenty of options for generic ABAP types. A prominent one
is `data` that stands for any data type (the older generic
type `any` has the same effect). See more information in the
is `data` that stands for any data type. See more information in the
topic [Generic ABAP
Types](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenbuilt_in_types_generic.htm).
>- Field symbols cannot be declared in the declaration part of
@@ -268,7 +267,7 @@ data object](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.ht
at runtime by assigning the reference to the data object of a data reference variable. You can use the [instance
operator](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abeninstance_operator_glosry.htm "Glossary Entry")
[`NEW`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenconstructor_expression_new.htm).
It replaces the older syntax [`CREATE DATA`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abapcreate_data.htm). However, as shown further, `CREATE DATA` is required for specifying a dynamically determined type.
It replaces the older syntax [`CREATE DATA`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abapcreate_data.htm). However, as shown below, `CREATE DATA` is required for specifying a dynamically determined type.
``` abap
"Declaring data reference variables
@@ -365,7 +364,7 @@ ref5 = CAST #( ref6 ).
Before addressing the content of data objects a data reference points to, you must dereference data reference variables. Use the
[dereferencing operator](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abendereferencing_operat_glosry.htm "Glossary Entry")
`->*`. To check if dereferncing works, you can use a logical expression with [`IS BOUND`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenlogexp_bound.htm).
`->*`. To check if dereferencing works, you can use a logical expression with [`IS BOUND`](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenlogexp_bound.htm).
``` abap
"Creating data reference variables and assign values
@@ -580,10 +579,10 @@ Note that dynamically specifying syntax elements has downsides, too. Consider so
ENDLOOP.
```
- ASSIGN statements
- `ASSIGN` statements
``` abap
"Accessing components of structures dynamically
"Dynamically accessing components of structures
"Populating a structure
SELECT SINGLE *
@@ -691,7 +690,7 @@ Note that dynamically specifying syntax elements has downsides, too. Consider so
"in place. The advantage is that the data type is constructed in a suitable way.
SELECT *
FROM (db_table)
INTO TABLE NEW @DATA(a_dobj).
INTO TABLE NEW @DATA(dref_tab).
"Dynamic WHERE clause
"This is an example for using an internal table with a character-like row type