ABAP Select data from SAP table CXAFAB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CXAFAB 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 CXAFAB. 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 CXAFAB 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_CXAFAB TYPE STANDARD TABLE OF CXAFAB,
      WA_CXAFAB TYPE CXAFAB,
      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: <CXAFAB> TYPE CXAFAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CXAFAB
*  INTO TABLE @DATA(IT_CXAFAB2).
*--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_CXAFAB INDEX 1 INTO DATA(WA_CXAFAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CXAFAB>-PLNTY = 1.
<CXAFAB>-PLNNR = 1.
<CXAFAB>-PLNAL = 1.
<CXAFAB>-PLNKN = 1.
<CXAFAB>-PLNRN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CXAFAB-ALNRN, sy-vline,
  WA_CXAFAB-KNNRN, sy-vline,
  WA_CXAFAB-AOBAR, sy-vline,
  WA_CXAFAB-MIMAX, sy-vline,
  WA_CXAFAB-FSABD, sy-vline,
  WA_CXAFAB-FSABZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CXAFAB 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_CXAFAB 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_CXAFAB INTO WA_CXAFAB.


*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 ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CXAFAB-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXAFAB-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CXAFAB-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXAFAB-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CXAFAB-PLNRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXAFAB-PLNRN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ALNRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CXAFAB-ALNRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXAFAB-ALNRN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_CXAFAB-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXAFAB-AOBAR.
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_CXAFAB_STR, 
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNKN TYPE STRING,
PLNRN TYPE STRING,
ALNRN TYPE STRING,
KNNRN TYPE STRING,
AOBAR TYPE STRING,
MIMAX TYPE STRING,
FSABD TYPE STRING,
FSABZ TYPE STRING,
SSABD TYPE STRING,
SSABZ TYPE STRING,
FEABD TYPE STRING,
FEABZ TYPE STRING,
SEABD TYPE STRING,
SEABZ TYPE STRING,
DAUTM TYPE STRING,
INDBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CXAFAB_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_CXAFAB_STR-PLNTY sy-vline 
WA_CXAFAB_STR-PLNNR sy-vline 
WA_CXAFAB_STR-PLNAL sy-vline 
WA_CXAFAB_STR-PLNKN sy-vline 
WA_CXAFAB_STR-PLNRN sy-vline 
WA_CXAFAB_STR-ALNRN sy-vline 
WA_CXAFAB_STR-KNNRN sy-vline 
WA_CXAFAB_STR-AOBAR sy-vline 
WA_CXAFAB_STR-MIMAX sy-vline 
WA_CXAFAB_STR-FSABD sy-vline 
WA_CXAFAB_STR-FSABZ sy-vline 
WA_CXAFAB_STR-SSABD sy-vline 
WA_CXAFAB_STR-SSABZ sy-vline 
WA_CXAFAB_STR-FEABD sy-vline 
WA_CXAFAB_STR-FEABZ sy-vline 
WA_CXAFAB_STR-SEABD sy-vline 
WA_CXAFAB_STR-SEABZ sy-vline 
WA_CXAFAB_STR-DAUTM sy-vline 
WA_CXAFAB_STR-INDBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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