ABAP Select data from SAP table PMXLIST_ISS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXLIST_ISS
*  INTO TABLE @DATA(IT_PMXLIST_ISS2).
*--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_PMXLIST_ISS INDEX 1 INTO DATA(WA_PMXLIST_ISS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXLIST_ISS>-REPAT = 1.
<PMXLIST_ISS>-RASOC = 1.
<PMXLIST_ISS>-WERKS = 1.
<PMXLIST_ISS>-BTRTL = 1.
<PMXLIST_ISS>-ABKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXLIST_ISS-NIMSS, sy-vline,
  WA_PMXLIST_ISS-PERNR, sy-vline,
  WA_PMXLIST_ISS-NAME, sy-vline,
  WA_PMXLIST_ISS-REFNR, sy-vline,
  WA_PMXLIST_ISS-KALTG, sy-vline,
  WA_PMXLIST_ISS-ABWTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXLIST_ISS 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_PMXLIST_ISS 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_PMXLIST_ISS INTO WA_PMXLIST_ISS.


*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_PMXLIST_ISS_STR, 
REPAT TYPE STRING,
RASOC TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
ABKRS TYPE STRING,
NIMSS TYPE STRING,
PERNR TYPE STRING,
NAME TYPE STRING,
REFNR TYPE STRING,
KALTG TYPE STRING,
ABWTG TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
AWART TYPE STRING,
ATEXT TYPE STRING,
SDSPC TYPE STRING,
AEDTM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXLIST_ISS_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_PMXLIST_ISS_STR-REPAT sy-vline 
WA_PMXLIST_ISS_STR-RASOC sy-vline 
WA_PMXLIST_ISS_STR-WERKS sy-vline 
WA_PMXLIST_ISS_STR-BTRTL sy-vline 
WA_PMXLIST_ISS_STR-ABKRS sy-vline 
WA_PMXLIST_ISS_STR-NIMSS sy-vline 
WA_PMXLIST_ISS_STR-PERNR sy-vline 
WA_PMXLIST_ISS_STR-NAME sy-vline 
WA_PMXLIST_ISS_STR-REFNR sy-vline 
WA_PMXLIST_ISS_STR-KALTG sy-vline 
WA_PMXLIST_ISS_STR-ABWTG sy-vline 
WA_PMXLIST_ISS_STR-BEGDA sy-vline 
WA_PMXLIST_ISS_STR-ENDDA sy-vline 
WA_PMXLIST_ISS_STR-AWART sy-vline 
WA_PMXLIST_ISS_STR-ATEXT sy-vline 
WA_PMXLIST_ISS_STR-SDSPC sy-vline 
WA_PMXLIST_ISS_STR-AEDTM sy-vline      INTO ld_text SEPARATED BY SPACE.

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