ABAP Select data from SAP table /NAM/JDISP_POPUP_FIELDCATALOG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /NAM/JDISP_POPUP_FIELDCATALOG 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 /NAM/JDISP_POPUP_FIELDCATALOG. 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 /NAM/JDISP_POPUP_FIELDCATALOG 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_/NAM/JDISP_POPUP_FIELDCATALOG TYPE STANDARD TABLE OF /NAM/JDISP_POPUP_FIELDCATALOG,
      WA_/NAM/JDISP_POPUP_FIELDCATALOG TYPE /NAM/JDISP_POPUP_FIELDCATALOG,
      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: </NAM/JDISP_POPUP_FIELDCATALOG> TYPE /NAM/JDISP_POPUP_FIELDCATALOG.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /NAM/JDISP_POPUP_FIELDCATALOG
  INTO TABLE IT_/NAM/JDISP_POPUP_FIELDCATALOG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /NAM/JDISP_POPUP_FIELDCATALOG
*  INTO TABLE @DATA(IT_/NAM/JDISP_POPUP_FIELDCATALOG2).
*--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_/NAM/JDISP_POPUP_FIELDCATALOG INDEX 1 INTO DATA(WA_/NAM/JDISP_POPUP_FIELDCATALOG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/NAM/JDISP_POPUP_FIELDCATALOG ASSIGNING </NAM/JDISP_POPUP_FIELDCATALOG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</NAM/JDISP_POPUP_FIELDCATALOG>-DISP_OBJ = 1.
</NAM/JDISP_POPUP_FIELDCATALOG>-VERSION = 1.
</NAM/JDISP_POPUP_FIELDCATALOG>-ERFUSER = 1.
</NAM/JDISP_POPUP_FIELDCATALOG>-CREATED_DATE = 1.
</NAM/JDISP_POPUP_FIELDCATALOG>-CREATED_TIME = 1.

ENDLOOP.

LOOP AT IT_/NAM/JDISP_POPUP_FIELDCATALOG INTO WA_/NAM/JDISP_POPUP_FIELDCATALOG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/NAM/JDISP_POPUP_FIELDCATALOG-REASON, sy-vline,
  WA_/NAM/JDISP_POPUP_FIELDCATALOG-REASON_DESC, sy-vline,
  WA_/NAM/JDISP_POPUP_FIELDCATALOG-DISPATCHER, sy-vline,
  WA_/NAM/JDISP_POPUP_FIELDCATALOG-SERVRUNNER, sy-vline,
  WA_/NAM/JDISP_POPUP_FIELDCATALOG-PRIO, sy-vline,
  WA_/NAM/JDISP_POPUP_FIELDCATALOG-PRIO_DESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/NAM/JDISP_POPUP_FIELDCATALOG 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_/NAM/JDISP_POPUP_FIELDCATALOG 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_/NAM/JDISP_POPUP_FIELDCATALOG INTO WA_/NAM/JDISP_POPUP_FIELDCATALOG.


*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 DISP_OBJ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/NAM/JDISP_POPUP_FIELDCATALOG-DISP_OBJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAM/JDISP_POPUP_FIELDCATALOG-DISP_OBJ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SERVRUNNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/NAM/JDISP_POPUP_FIELDCATALOG-SERVRUNNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAM/JDISP_POPUP_FIELDCATALOG-SERVRUNNER.
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_/NAM/JDISP_POPUP_FIELDCATALOG_STR, 
DISP_OBJ TYPE STRING,
VERSION TYPE STRING,
ERFUSER TYPE STRING,
CREATED_DATE TYPE STRING,
CREATED_TIME TYPE STRING,
REASON TYPE STRING,
REASON_DESC TYPE STRING,
DISPATCHER TYPE STRING,
SERVRUNNER TYPE STRING,
PRIO TYPE STRING,
PRIO_DESC TYPE STRING,
STATUS TYPE STRING,
STATUS_DESC TYPE STRING,
REDELIV TYPE STRING,
REDELIV_DESC TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/NAM/JDISP_POPUP_FIELDCATALOG_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_/NAM/JDISP_POPUP_FIELDCATALOG_STR-DISP_OBJ sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-VERSION sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-ERFUSER sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-CREATED_DATE sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-CREATED_TIME sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-REASON sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-REASON_DESC sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-DISPATCHER sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-SERVRUNNER sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-PRIO sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-PRIO_DESC sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-STATUS sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-STATUS_DESC sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-REDELIV sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-REDELIV_DESC sy-vline 
WA_/NAM/JDISP_POPUP_FIELDCATALOG_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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