ABAP Select data from SAP table MMSRV_SRV_PKG_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMSRV_SRV_PKG_STY
*  INTO TABLE @DATA(IT_MMSRV_SRV_PKG_STY2).
*--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_MMSRV_SRV_PKG_STY INDEX 1 INTO DATA(WA_MMSRV_SRV_PKG_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMSRV_SRV_PKG_STY>-PACKNO = 1.
<MMSRV_SRV_PKG_STY>-SUB_PACKNO = 1.
<MMSRV_SRV_PKG_STY>-LINE_NUM = 1.
<MMSRV_SRV_PKG_STY>-EXT_NUM = 1.
<MMSRV_SRV_PKG_STY>-SHORT_TEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMSRV_SRV_PKG_STY-LLTXT, sy-vline,
  WA_MMSRV_SRV_PKG_STY-SLTXT, sy-vline,
  WA_MMSRV_SRV_PKG_STY-SERV_NUM, sy-vline,
  WA_MMSRV_SRV_PKG_STY-QTY, sy-vline,
  WA_MMSRV_SRV_PKG_STY-UNIT, sy-vline,
  WA_MMSRV_SRV_PKG_STY-GRS_PRC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMSRV_SRV_PKG_STY 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_MMSRV_SRV_PKG_STY 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_MMSRV_SRV_PKG_STY INTO WA_MMSRV_SRV_PKG_STY.


*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 SERV_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMSRV_SRV_PKG_STY-SERV_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMSRV_SRV_PKG_STY-SERV_NUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMSRV_SRV_PKG_STY-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMSRV_SRV_PKG_STY-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMSRV_SRV_PKG_STY-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMSRV_SRV_PKG_STY-EBELN.
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_MMSRV_SRV_PKG_STY_STR, 
PACKNO TYPE STRING,
SUB_PACKNO TYPE STRING,
LINE_NUM TYPE STRING,
EXT_NUM TYPE STRING,
SHORT_TEXT TYPE STRING,
LLTXT TYPE STRING,
SLTXT TYPE STRING,
SERV_NUM TYPE STRING,
QTY TYPE STRING,
UNIT TYPE STRING,
GRS_PRC TYPE STRING,
CURR TYPE STRING,
QTY_RENDRD TYPE STRING,
VAL_RENDRD TYPE STRING,
TOT_VAL TYPE STRING,
DEL_INDICATOR TYPE STRING,
PEINH TYPE STRING,
RANG TYPE STRING,
EXTGROUP TYPE STRING,
MATKL TYPE STRING,
BASIC TYPE STRING,
ALTERNAT TYPE STRING,
SUPPLE TYPE STRING,
FREEQTY TYPE STRING,
INFORM TYPE STRING,
PAUSCH TYPE STRING,
EVENTUAL TYPE STRING,
BIDDER TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMSRV_SRV_PKG_STY_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_MMSRV_SRV_PKG_STY_STR-PACKNO sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-SUB_PACKNO sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-LINE_NUM sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-EXT_NUM sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-SHORT_TEXT sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-LLTXT sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-SLTXT sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-SERV_NUM sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-QTY sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-UNIT sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-GRS_PRC sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-CURR sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-QTY_RENDRD sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-VAL_RENDRD sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-TOT_VAL sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-DEL_INDICATOR sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-PEINH sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-RANG sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-EXTGROUP sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-MATKL sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-BASIC sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-ALTERNAT sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-SUPPLE sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-FREEQTY sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-INFORM sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-PAUSCH sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-EVENTUAL sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-BIDDER sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-EBELN sy-vline 
WA_MMSRV_SRV_PKG_STY_STR-EBELP sy-vline      INTO ld_text SEPARATED BY SPACE.

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