ABAP Select data from SAP table PMXSTAX_T_DETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXSTAX_T_DETAIL
*  INTO TABLE @DATA(IT_PMXSTAX_T_DETAIL2).
*--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_PMXSTAX_T_DETAIL INDEX 1 INTO DATA(WA_PMXSTAX_T_DETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXSTAX_T_DETAIL>-SECTN = 1.
<PMXSTAX_T_DETAIL>-ANPRO = 1.
<PMXSTAX_T_DETAIL>-STMON = 1.
<PMXSTAX_T_DETAIL>-STATE = 1.
<PMXSTAX_T_DETAIL>-IMEST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXSTAX_T_DETAIL-BIMNO, sy-vline,
  WA_PMXSTAX_T_DETAIL-IMNSS, sy-vline,
  WA_PMXSTAX_T_DETAIL-IMSNO, sy-vline,
  WA_PMXSTAX_T_DETAIL-STBEG, sy-vline,
  WA_PMXSTAX_T_DETAIL-STEND, sy-vline,
  WA_PMXSTAX_T_DETAIL-DELIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXSTAX_T_DETAIL 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_PMXSTAX_T_DETAIL 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_PMXSTAX_T_DETAIL INTO WA_PMXSTAX_T_DETAIL.


*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 GJAHR, internal->external for field ANPRO
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PMXSTAX_T_DETAIL-ANPRO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMXSTAX_T_DETAIL-ANPRO.
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_PMXSTAX_T_DETAIL_STR, 
SECTN TYPE STRING,
ANPRO TYPE STRING,
STMON TYPE STRING,
STATE TYPE STRING,
IMEST TYPE STRING,
BIMNO TYPE STRING,
IMNSS TYPE STRING,
IMSNO TYPE STRING,
STBEG TYPE STRING,
STEND TYPE STRING,
DELIN TYPE STRING,
DEEXC TYPE STRING,
DEMAR TYPE STRING,
DEQTA TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXSTAX_T_DETAIL_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_PMXSTAX_T_DETAIL_STR-SECTN sy-vline 
WA_PMXSTAX_T_DETAIL_STR-ANPRO sy-vline 
WA_PMXSTAX_T_DETAIL_STR-STMON sy-vline 
WA_PMXSTAX_T_DETAIL_STR-STATE sy-vline 
WA_PMXSTAX_T_DETAIL_STR-IMEST sy-vline 
WA_PMXSTAX_T_DETAIL_STR-BIMNO sy-vline 
WA_PMXSTAX_T_DETAIL_STR-IMNSS sy-vline 
WA_PMXSTAX_T_DETAIL_STR-IMSNO sy-vline 
WA_PMXSTAX_T_DETAIL_STR-STBEG sy-vline 
WA_PMXSTAX_T_DETAIL_STR-STEND sy-vline 
WA_PMXSTAX_T_DETAIL_STR-DELIN sy-vline 
WA_PMXSTAX_T_DETAIL_STR-DEEXC sy-vline 
WA_PMXSTAX_T_DETAIL_STR-DEMAR sy-vline 
WA_PMXSTAX_T_DETAIL_STR-DEQTA sy-vline 
WA_PMXSTAX_T_DETAIL_STR-BEGDA sy-vline 
WA_PMXSTAX_T_DETAIL_STR-ENDDA sy-vline      INTO ld_text SEPARATED BY SPACE.

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