ABAP Select data from SAP table CFWAEH into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CFWAEH table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CFWAEH. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CFWAEH table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CFWAEH TYPE STANDARD TABLE OF CFWAEH,
      WA_CFWAEH TYPE CFWAEH,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CFWAEH> TYPE CFWAEH.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CFWAEH.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CFWAEH
  INTO TABLE IT_CFWAEH.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CFWAEH
*  INTO TABLE @DATA(IT_CFWAEH2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CFWAEH INDEX 1 INTO DATA(WA_CFWAEH2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CFWAEH ASSIGNING <CFWAEH>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CFWAEH>-X_ZFIX = 1.
<CFWAEH>-X_GJAHR = 1.
<CFWAEH>-L_GJAHR = 1.
<CFWAEH>-H_GJAHR = 1.
<CFWAEH>-X_PERDE = 1.

ENDLOOP.

LOOP AT IT_CFWAEH INTO WA_CFWAEH.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CFWAEH-L_PERDE, sy-vline,
  WA_CFWAEH-H_PERDE, sy-vline,
  WA_CFWAEH-X_PERIO, sy-vline,
  WA_CFWAEH-X_ALTPE, sy-vline,
  WA_CFWAEH-L_ALTPE, sy-vline,
  WA_CFWAEH-H_ALTPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CFWAEH you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CFWAEH TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CFWAEH INTO WA_CFWAEH.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit GJAHR, internal->external for field L_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-L_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-L_GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field H_GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-H_GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-H_GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field L_ALTPE
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-L_ALTPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-L_ALTPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field H_ALTPE
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-H_ALTPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-H_ALTPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field L_WOCHE
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-L_WOCHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-L_WOCHE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field H_WOCHE
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_CFWAEH-H_WOCHE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CFWAEH-H_WOCHE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CFWAEH_STR, 
X_ZFIX TYPE STRING,
X_GJAHR TYPE STRING,
L_GJAHR TYPE STRING,
H_GJAHR TYPE STRING,
X_PERDE TYPE STRING,
L_PERDE TYPE STRING,
H_PERDE TYPE STRING,
X_PERIO TYPE STRING,
X_ALTPE TYPE STRING,
L_ALTPE TYPE STRING,
H_ALTPE TYPE STRING,
X_WOCHE TYPE STRING,
L_WOCHE TYPE STRING,
H_WOCHE TYPE STRING,
X_DATU1 TYPE STRING,
X_DATU2 TYPE STRING,
L_DATUM TYPE STRING,
H_DATUM TYPE STRING,
L_DATUM_T TYPE STRING,
H_DATUM_T TYPE STRING,
DATUM_GR TYPE STRING,
AKTIV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CFWAEH_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CFWAEH_STR-X_ZFIX sy-vline 
WA_CFWAEH_STR-X_GJAHR sy-vline 
WA_CFWAEH_STR-L_GJAHR sy-vline 
WA_CFWAEH_STR-H_GJAHR sy-vline 
WA_CFWAEH_STR-X_PERDE sy-vline 
WA_CFWAEH_STR-L_PERDE sy-vline 
WA_CFWAEH_STR-H_PERDE sy-vline 
WA_CFWAEH_STR-X_PERIO sy-vline 
WA_CFWAEH_STR-X_ALTPE sy-vline 
WA_CFWAEH_STR-L_ALTPE sy-vline 
WA_CFWAEH_STR-H_ALTPE sy-vline 
WA_CFWAEH_STR-X_WOCHE sy-vline 
WA_CFWAEH_STR-L_WOCHE sy-vline 
WA_CFWAEH_STR-H_WOCHE sy-vline 
WA_CFWAEH_STR-X_DATU1 sy-vline 
WA_CFWAEH_STR-X_DATU2 sy-vline 
WA_CFWAEH_STR-L_DATUM sy-vline 
WA_CFWAEH_STR-H_DATUM sy-vline 
WA_CFWAEH_STR-L_DATUM_T sy-vline 
WA_CFWAEH_STR-H_DATUM_T sy-vline 
WA_CFWAEH_STR-DATUM_GR sy-vline 
WA_CFWAEH_STR-AKTIV sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.