ABAP Select data from SAP table PMXLIST_RT2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PMXLIST_RT2 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_RT2. 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_RT2 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_RT2 TYPE STANDARD TABLE OF PMXLIST_RT2,
      WA_PMXLIST_RT2 TYPE PMXLIST_RT2,
      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_RT2> TYPE PMXLIST_RT2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PMXLIST_RT2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PMXLIST_RT2
  INTO TABLE IT_PMXLIST_RT2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXLIST_RT2
*  INTO TABLE @DATA(IT_PMXLIST_RT22).
*--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_RT2 INDEX 1 INTO DATA(WA_PMXLIST_RT22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PMXLIST_RT2 ASSIGNING <PMXLIST_RT2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXLIST_RT2>-REPAT = 1.
<PMXLIST_RT2>-WERKS = 1.
<PMXLIST_RT2>-BTRTL = 1.
<PMXLIST_RT2>-PERNR = 1.
<PMXLIST_RT2>-ENAME = 1.

ENDLOOP.

LOOP AT IT_PMXLIST_RT2 INTO WA_PMXLIST_RT2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXLIST_RT2-NIMSS, sy-vline,
  WA_PMXLIST_RT2-BEGDA, sy-vline,
  WA_PMXLIST_RT2-ENDDA, sy-vline,
  WA_PMXLIST_RT2-DEFUNS, sy-vline,
  WA_PMXLIST_RT2-ENDEF, sy-vline,
  WA_PMXLIST_RT2-KALTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXLIST_RT2 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_RT2 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_RT2 INTO WA_PMXLIST_RT2.


*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 AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PMXLIST_RT2-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMXLIST_RT2-AWREF.
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_PMXLIST_RT2_STR, 
REPAT TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
PERNR TYPE STRING,
ENAME TYPE STRING,
NIMSS TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
DEFUNS TYPE STRING,
ENDEF TYPE STRING,
KALTG TYPE STRING,
TIRIE TYPE STRING,
PSARB TYPE STRING,
REREV TYPE STRING,
KENN1 TYPE STRING,
KENN2 TYPE STRING,
CURP TYPE STRING,
REFNR TYPE STRING,
AWREF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXLIST_RT2_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_RT2_STR-REPAT sy-vline 
WA_PMXLIST_RT2_STR-WERKS sy-vline 
WA_PMXLIST_RT2_STR-BTRTL sy-vline 
WA_PMXLIST_RT2_STR-PERNR sy-vline 
WA_PMXLIST_RT2_STR-ENAME sy-vline 
WA_PMXLIST_RT2_STR-NIMSS sy-vline 
WA_PMXLIST_RT2_STR-BEGDA sy-vline 
WA_PMXLIST_RT2_STR-ENDDA sy-vline 
WA_PMXLIST_RT2_STR-DEFUNS sy-vline 
WA_PMXLIST_RT2_STR-ENDEF sy-vline 
WA_PMXLIST_RT2_STR-KALTG sy-vline 
WA_PMXLIST_RT2_STR-TIRIE sy-vline 
WA_PMXLIST_RT2_STR-PSARB sy-vline 
WA_PMXLIST_RT2_STR-REREV sy-vline 
WA_PMXLIST_RT2_STR-KENN1 sy-vline 
WA_PMXLIST_RT2_STR-KENN2 sy-vline 
WA_PMXLIST_RT2_STR-CURP sy-vline 
WA_PMXLIST_RT2_STR-REFNR sy-vline 
WA_PMXLIST_RT2_STR-AWREF sy-vline      INTO ld_text SEPARATED BY SPACE.

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