ABAP Select data from SAP table FAC_ACC_DET_S_FIELD_CATALOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FAC_ACC_DET_S_FIELD_CATALOG
*  INTO TABLE @DATA(IT_FAC_ACC_DET_S_FIELD_CATALOG2).
*--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_FAC_ACC_DET_S_FIELD_CATALOG INDEX 1 INTO DATA(WA_FAC_ACC_DET_S_FIELD_CATALOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FAC_ACC_DET_S_FIELD_CATALOG>-KOTABNR = 1.
<FAC_ACC_DET_S_FIELD_CATALOG>-KSCHL = 1.
<FAC_ACC_DET_S_FIELD_CATALOG>-VKORG = 1.
<FAC_ACC_DET_S_FIELD_CATALOG>-VTWEG = 1.
<FAC_ACC_DET_S_FIELD_CATALOG>-KTGRD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FAC_ACC_DET_S_FIELD_CATALOG-WERKS, sy-vline,
  WA_FAC_ACC_DET_S_FIELD_CATALOG-KTGRM, sy-vline,
  WA_FAC_ACC_DET_S_FIELD_CATALOG-KSCHA, sy-vline,
  WA_FAC_ACC_DET_S_FIELD_CATALOG-KVSL1, sy-vline,
  WA_FAC_ACC_DET_S_FIELD_CATALOG-SPART, sy-vline,
  WA_FAC_ACC_DET_S_FIELD_CATALOG-CCINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FAC_ACC_DET_S_FIELD_CATALOG 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_FAC_ACC_DET_S_FIELD_CATALOG 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_FAC_ACC_DET_S_FIELD_CATALOG INTO WA_FAC_ACC_DET_S_FIELD_CATALOG.


*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 KOTAB, internal->external for field KOTABNR
CALL FUNCTION 'CONVERSION_EXIT_KOTAB_OUTPUT'
  EXPORTING
    input =                      WA_FAC_ACC_DET_S_FIELD_CATALOG-KOTABNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAC_ACC_DET_S_FIELD_CATALOG-KOTABNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SAKN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FAC_ACC_DET_S_FIELD_CATALOG-SAKN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAC_ACC_DET_S_FIELD_CATALOG-SAKN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FAC_ACC_DET_S_FIELD_CATALOG-SAKN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAC_ACC_DET_S_FIELD_CATALOG-SAKN2.
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_FAC_ACC_DET_S_FIELD_CATALOG_STR, 
KOTABNR TYPE STRING,
KSCHL TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
KTGRD TYPE STRING,
WERKS TYPE STRING,
KTGRM TYPE STRING,
KSCHA TYPE STRING,
KVSL1 TYPE STRING,
SPART TYPE STRING,
CCINS TYPE STRING,
LOCID TYPE STRING,
LIFNR TYPE STRING,
MWSKZ TYPE STRING,
BEMOT TYPE STRING,
AUGRU TYPE STRING,
KDUMMY TYPE STRING,
PDUMMY TYPE STRING,
KTOPL TYPE STRING,
KAPPL TYPE STRING,
KALSMC TYPE STRING,
RKPREL TYPE STRING,
LLAND TYPE STRING,
IX_KOMT1_V TYPE STRING,
IX_KOMT1_B TYPE STRING,
POSNR TYPE STRING,
STUNR TYPE STRING,
KRUEK TYPE STRING,
SAKN1 TYPE STRING,
SAKN2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FAC_ACC_DET_S_FIELD_CATALOG_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_FAC_ACC_DET_S_FIELD_CATALOG_STR-KOTABNR sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KSCHL sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-VKORG sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-VTWEG sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KTGRD sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-WERKS sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KTGRM sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KSCHA sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KVSL1 sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-SPART sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-CCINS sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-LOCID sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-LIFNR sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-MWSKZ sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-BEMOT sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-AUGRU sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KDUMMY sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-PDUMMY sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KTOPL sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KAPPL sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KALSMC sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-RKPREL sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-LLAND sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-IX_KOMT1_V sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-IX_KOMT1_B sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-POSNR sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-STUNR sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-KRUEK sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-SAKN1 sy-vline 
WA_FAC_ACC_DET_S_FIELD_CATALOG_STR-SAKN2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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