ABAP Select data from SAP table PMXSTAX_T_SUPPLEMENTARY 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_SUPPLEMENTARY 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_SUPPLEMENTARY. 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_SUPPLEMENTARY 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_SUPPLEMENTARY TYPE STANDARD TABLE OF PMXSTAX_T_SUPPLEMENTARY,
      WA_PMXSTAX_T_SUPPLEMENTARY TYPE PMXSTAX_T_SUPPLEMENTARY,
      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_SUPPLEMENTARY> TYPE PMXSTAX_T_SUPPLEMENTARY.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMXSTAX_T_SUPPLEMENTARY
*  INTO TABLE @DATA(IT_PMXSTAX_T_SUPPLEMENTARY2).
*--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_SUPPLEMENTARY INDEX 1 INTO DATA(WA_PMXSTAX_T_SUPPLEMENTARY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMXSTAX_T_SUPPLEMENTARY>-SECTN = 1.
<PMXSTAX_T_SUPPLEMENTARY>-SUPTX = 1.
<PMXSTAX_T_SUPPLEMENTARY>-SUDEN = 1.
<PMXSTAX_T_SUPPLEMENTARY>-SUPCT = 1.
<PMXSTAX_T_SUPPLEMENTARY>-SUPWT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMXSTAX_T_SUPPLEMENTARY-SUTOT, sy-vline,
  WA_PMXSTAX_T_SUPPLEMENTARY-SURTR, sy-vline,
  WA_PMXSTAX_T_SUPPLEMENTARY-SUFPB, sy-vline,
  WA_PMXSTAX_T_SUPPLEMENTARY-SUFPE, sy-vline,
  WA_PMXSTAX_T_SUPPLEMENTARY-BEGDA, sy-vline,
  WA_PMXSTAX_T_SUPPLEMENTARY-ENDDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMXSTAX_T_SUPPLEMENTARY 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_SUPPLEMENTARY 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_SUPPLEMENTARY INTO WA_PMXSTAX_T_SUPPLEMENTARY.


*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_PMXSTAX_T_SUPPLEMENTARY_STR, 
SECTN TYPE STRING,
SUPTX TYPE STRING,
SUDEN TYPE STRING,
SUPCT TYPE STRING,
SUPWT TYPE STRING,
SUTOT TYPE STRING,
SURTR TYPE STRING,
SUFPB TYPE STRING,
SUFPE TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMXSTAX_T_SUPPLEMENTARY_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_SUPPLEMENTARY_STR-SECTN sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUPTX sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUDEN sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUPCT sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUPWT sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUTOT sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SURTR sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUFPB sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-SUFPE sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_STR-BEGDA sy-vline 
WA_PMXSTAX_T_SUPPLEMENTARY_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.