ABAP Select data from SAP table PMXDAQ_T_NATPER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXDAQ_T_NATPER
*  INTO TABLE @DATA(IT_PMXDAQ_T_NATPER2).
*--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_PMXDAQ_T_NATPER INDEX 1 INTO DATA(WA_PMXDAQ_T_NATPER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXDAQ_T_NATPER>-SECTN = 1.
<PMXDAQ_T_NATPER>-SEQNR = 1.
<PMXDAQ_T_NATPER>-NPNAM = 1.
<PMXDAQ_T_NATPER>-NPBDT = 1.
<PMXDAQ_T_NATPER>-NPBPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXDAQ_T_NATPER-NPBCN, sy-vline,
  WA_PMXDAQ_T_NATPER-NPSEX, sy-vline,
  WA_PMXDAQ_T_NATPER-NPSTR, sy-vline,
  WA_PMXDAQ_T_NATPER-NPHNR, sy-vline,
  WA_PMXDAQ_T_NATPER-NPDIS, sy-vline,
  WA_PMXDAQ_T_NATPER-NPZIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXDAQ_T_NATPER 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_PMXDAQ_T_NATPER 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_PMXDAQ_T_NATPER INTO WA_PMXDAQ_T_NATPER.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_PMXDAQ_T_NATPER_STR, 
SECTN TYPE STRING,
SEQNR TYPE STRING,
NPNAM TYPE STRING,
NPBDT TYPE STRING,
NPBPL TYPE STRING,
NPBCN TYPE STRING,
NPSEX TYPE STRING,
NPSTR TYPE STRING,
NPHNR TYPE STRING,
NPDIS TYPE STRING,
NPZIP TYPE STRING,
NPCIT TYPE STRING,
NPSTA TYPE STRING,
NPMUN TYPE STRING,
NPCNT TYPE STRING,
NPTEL TYPE STRING,
NPNAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXDAQ_T_NATPER_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_PMXDAQ_T_NATPER_STR-SECTN sy-vline 
WA_PMXDAQ_T_NATPER_STR-SEQNR sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPNAM sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPBDT sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPBPL sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPBCN sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPSEX sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPSTR sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPHNR sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPDIS sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPZIP sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPCIT sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPSTA sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPMUN sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPCNT sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPTEL sy-vline 
WA_PMXDAQ_T_NATPER_STR-NPNAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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