ABAP Select data from SAP table CNPB_H_FILE_MANDATORY_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNPB_H_FILE_MANDATORY_FIELDS
*  INTO TABLE @DATA(IT_CNPB_H_FILE_MANDATORY_FIELDS2).
*--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_CNPB_H_FILE_MANDATORY_FIELDS INDEX 1 INTO DATA(WA_CNPB_H_FILE_MANDATORY_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNPB_H_FILE_MANDATORY_FIELDS>-AUFNR = 1.
<CNPB_H_FILE_MANDATORY_FIELDS>-VORNR = 1.
<CNPB_H_FILE_MANDATORY_FIELDS>-PSPNR = 1.
<CNPB_H_FILE_MANDATORY_FIELDS>-RSNUM = 1.
<CNPB_H_FILE_MANDATORY_FIELDS>-RSPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKAR, sy-vline,
  WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKNR, sy-vline,
  WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKVR, sy-vline,
  WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKTL, sy-vline,
  WA_CNPB_H_FILE_MANDATORY_FIELDS-APPNR, sy-vline,
  WA_CNPB_H_FILE_MANDATORY_FIELDS-ICON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNPB_H_FILE_MANDATORY_FIELDS 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_CNPB_H_FILE_MANDATORY_FIELDS 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_CNPB_H_FILE_MANDATORY_FIELDS INTO WA_CNPB_H_FILE_MANDATORY_FIELDS.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_H_FILE_MANDATORY_FIELDS-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_H_FILE_MANDATORY_FIELDS-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_H_FILE_MANDATORY_FIELDS-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_H_FILE_MANDATORY_FIELDS-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_H_FILE_MANDATORY_FIELDS-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_H_FILE_MANDATORY_FIELDS-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNPB_H_FILE_MANDATORY_FIELDS-DOKNR.
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_CNPB_H_FILE_MANDATORY_FIELDS_STR, 
AUFNR TYPE STRING,
VORNR TYPE STRING,
PSPNR TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
APPNR TYPE STRING,
ICON TYPE STRING,
DAPPL TYPE STRING,
CVTEXT TYPE STRING,
FILENAME TYPE STRING,
DESCRIPTION TYPE STRING,
NODE_KEY TYPE STRING,
FLG_HANDLED TYPE STRING,
LOEKZ TYPE STRING,
LOCKED TYPE STRING,
EXPANDER TYPE STRING,
KTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNPB_H_FILE_MANDATORY_FIELDS_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_CNPB_H_FILE_MANDATORY_FIELDS_STR-AUFNR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-VORNR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-PSPNR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-RSNUM sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-RSPOS sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DOKAR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DOKNR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DOKVR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DOKTL sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-APPNR sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-ICON sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DAPPL sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-CVTEXT sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-FILENAME sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-DESCRIPTION sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-NODE_KEY sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-FLG_HANDLED sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-LOEKZ sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-LOCKED sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-EXPANDER sy-vline 
WA_CNPB_H_FILE_MANDATORY_FIELDS_STR-KTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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