ABAP Select data from SAP table MNT_S_RESB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MNT_S_RESB
*  INTO TABLE @DATA(IT_MNT_S_RESB2).
*--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_MNT_S_RESB INDEX 1 INTO DATA(WA_MNT_S_RESB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MNT_S_RESB>-RSNUM = 1.
<MNT_S_RESB>-RSPOS = 1.
<MNT_S_RESB>-RSART = 1.
<MNT_S_RESB>-XWAOK = 1.
<MNT_S_RESB>-KZEAR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MNT_S_RESB-XFEHL, sy-vline,
  WA_MNT_S_RESB-MATNR, sy-vline,
  WA_MNT_S_RESB-WERKS, sy-vline,
  WA_MNT_S_RESB-LGORT, sy-vline,
  WA_MNT_S_RESB-CHARG, sy-vline,
  WA_MNT_S_RESB-SOBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MNT_S_RESB 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_MNT_S_RESB 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_MNT_S_RESB INTO WA_MNT_S_RESB.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_MNT_S_RESB-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MNT_S_RESB-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MNT_S_RESB-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MNT_S_RESB-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MNT_S_RESB-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MNT_S_RESB-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MNT_S_RESB-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MNT_S_RESB-POSNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MNT_S_RESB-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MNT_S_RESB-PSPEL.
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_MNT_S_RESB_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
XWAOK TYPE STRING,
KZEAR TYPE STRING,
XFEHL TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
BDTER TYPE STRING,
BDMNG TYPE STRING,
MEINS TYPE STRING,
SHKZG TYPE STRING,
ENMNG TYPE STRING,
AUFNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
NOMNG TYPE STRING,
POSNR TYPE STRING,
SCHGT TYPE STRING,
DBSKZ TYPE STRING,
DUMPS TYPE STRING,
PSPEL TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
VMENG TYPE STRING,
NO_DISP TYPE STRING,
BDZTP TYPE STRING,
KZAUS TYPE STRING,
NFUML TYPE STRING,
FLGEX TYPE STRING,
XLOEK TYPE STRING,
VBKZ TYPE STRING,
ADVCODE TYPE STRING,
PRIO_REQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MNT_S_RESB_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_MNT_S_RESB_STR-RSNUM sy-vline 
WA_MNT_S_RESB_STR-RSPOS sy-vline 
WA_MNT_S_RESB_STR-RSART sy-vline 
WA_MNT_S_RESB_STR-XWAOK sy-vline 
WA_MNT_S_RESB_STR-KZEAR sy-vline 
WA_MNT_S_RESB_STR-XFEHL sy-vline 
WA_MNT_S_RESB_STR-MATNR sy-vline 
WA_MNT_S_RESB_STR-WERKS sy-vline 
WA_MNT_S_RESB_STR-LGORT sy-vline 
WA_MNT_S_RESB_STR-CHARG sy-vline 
WA_MNT_S_RESB_STR-SOBKZ sy-vline 
WA_MNT_S_RESB_STR-BDTER sy-vline 
WA_MNT_S_RESB_STR-BDMNG sy-vline 
WA_MNT_S_RESB_STR-MEINS sy-vline 
WA_MNT_S_RESB_STR-SHKZG sy-vline 
WA_MNT_S_RESB_STR-ENMNG sy-vline 
WA_MNT_S_RESB_STR-AUFNR sy-vline 
WA_MNT_S_RESB_STR-KDAUF sy-vline 
WA_MNT_S_RESB_STR-KDPOS sy-vline 
WA_MNT_S_RESB_STR-NOMNG sy-vline 
WA_MNT_S_RESB_STR-POSNR sy-vline 
WA_MNT_S_RESB_STR-SCHGT sy-vline 
WA_MNT_S_RESB_STR-DBSKZ sy-vline 
WA_MNT_S_RESB_STR-DUMPS sy-vline 
WA_MNT_S_RESB_STR-PSPEL sy-vline 
WA_MNT_S_RESB_STR-AUFPL sy-vline 
WA_MNT_S_RESB_STR-APLZL sy-vline 
WA_MNT_S_RESB_STR-VMENG sy-vline 
WA_MNT_S_RESB_STR-NO_DISP sy-vline 
WA_MNT_S_RESB_STR-BDZTP sy-vline 
WA_MNT_S_RESB_STR-KZAUS sy-vline 
WA_MNT_S_RESB_STR-NFUML sy-vline 
WA_MNT_S_RESB_STR-FLGEX sy-vline 
WA_MNT_S_RESB_STR-XLOEK sy-vline 
WA_MNT_S_RESB_STR-VBKZ sy-vline 
WA_MNT_S_RESB_STR-ADVCODE sy-vline 
WA_MNT_S_RESB_STR-PRIO_REQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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