ABAP Select data from SAP table MHND_MASTER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MHND_MASTER
*  INTO TABLE @DATA(IT_MHND_MASTER2).
*--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_MHND_MASTER INDEX 1 INTO DATA(WA_MHND_MASTER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MHND_MASTER>-MANDT_MASTER = 1.
<MHND_MASTER>-BUKRS = 1.
<MHND_MASTER>-DUNN_BUKRS = 1.
<MHND_MASTER>-LAND1_KNA1 = 1.
<MHND_MASTER>-XMABE_T047 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MHND_MASTER-XSTMV_T047, sy-vline,
  WA_MHND_MASTER-KUNNR_MASTER, sy-vline,
  WA_MHND_MASTER-DUNN_KUNNR, sy-vline,
  WA_MHND_MASTER-XCPDK, sy-vline,
  WA_MHND_MASTER-LIFNR_KNA1, sy-vline,
  WA_MHND_MASTER-PSTLZ_KNA1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MHND_MASTER 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_MHND_MASTER 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_MHND_MASTER INTO WA_MHND_MASTER.


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

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

*Conversion exit ALPHA, internal->external for field LIFNR_KNA1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MHND_MASTER-LIFNR_KNA1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MHND_MASTER-LIFNR_KNA1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZE_KNB1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MHND_MASTER-KNRZE_KNB1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MHND_MASTER-KNRZE_KNB1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRMA_KNB5
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MHND_MASTER-KNRMA_KNB5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MHND_MASTER-KNRMA_KNB5.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field KUNNR_LFA1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MHND_MASTER-KUNNR_LFA1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MHND_MASTER-KUNNR_LFA1.
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_MHND_MASTER_STR, 
MANDT_MASTER TYPE STRING,
BUKRS TYPE STRING,
DUNN_BUKRS TYPE STRING,
LAND1_KNA1 TYPE STRING,
XMABE_T047 TYPE STRING,
XSTMV_T047 TYPE STRING,
KUNNR_MASTER TYPE STRING,
DUNN_KUNNR TYPE STRING,
XCPDK TYPE STRING,
LIFNR_KNA1 TYPE STRING,
PSTLZ_KNA1 TYPE STRING,
ORT01_KNA1 TYPE STRING,
STRAS_KNA1 TYPE STRING,
PFACH_KNA1 TYPE STRING,
BUSAB TYPE STRING,
XVERR_KNB1 TYPE STRING,
VZSKZ TYPE STRING,
XDIRECT_DEBIT TYPE STRING,
ZAHLS_KNB1 TYPE STRING,
MGRUP_KNB1 TYPE STRING,
XDEZV_KNB1 TYPE STRING,
KNRZE_KNB1 TYPE STRING,
MAHNA TYPE STRING,
GMVDT TYPE STRING,
MABER_KNB5 TYPE STRING,
MANSP_KNB5 TYPE STRING,
MADAT_KNB5 TYPE STRING,
MAHNS_KNB5 TYPE STRING,
EARLIEST_NEXT_MADAT TYPE STRING,
KNRMA_KNB5 TYPE STRING,
MAX_MAHNS TYPE STRING,
KULEP_T047A TYPE STRING,
XNUMS_T047A TYPE STRING,
UMSKD_T047A TYPE STRING,
UMSKK_T047A TYPE STRING,
LIFNR TYPE STRING,
KUNNR_LFA1 TYPE STRING,
XVERR_LFB1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MHND_MASTER_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_MHND_MASTER_STR-MANDT_MASTER sy-vline 
WA_MHND_MASTER_STR-BUKRS sy-vline 
WA_MHND_MASTER_STR-DUNN_BUKRS sy-vline 
WA_MHND_MASTER_STR-LAND1_KNA1 sy-vline 
WA_MHND_MASTER_STR-XMABE_T047 sy-vline 
WA_MHND_MASTER_STR-XSTMV_T047 sy-vline 
WA_MHND_MASTER_STR-KUNNR_MASTER sy-vline 
WA_MHND_MASTER_STR-DUNN_KUNNR sy-vline 
WA_MHND_MASTER_STR-XCPDK sy-vline 
WA_MHND_MASTER_STR-LIFNR_KNA1 sy-vline 
WA_MHND_MASTER_STR-PSTLZ_KNA1 sy-vline 
WA_MHND_MASTER_STR-ORT01_KNA1 sy-vline 
WA_MHND_MASTER_STR-STRAS_KNA1 sy-vline 
WA_MHND_MASTER_STR-PFACH_KNA1 sy-vline 
WA_MHND_MASTER_STR-BUSAB sy-vline 
WA_MHND_MASTER_STR-XVERR_KNB1 sy-vline 
WA_MHND_MASTER_STR-VZSKZ sy-vline 
WA_MHND_MASTER_STR-XDIRECT_DEBIT sy-vline 
WA_MHND_MASTER_STR-ZAHLS_KNB1 sy-vline 
WA_MHND_MASTER_STR-MGRUP_KNB1 sy-vline 
WA_MHND_MASTER_STR-XDEZV_KNB1 sy-vline 
WA_MHND_MASTER_STR-KNRZE_KNB1 sy-vline 
WA_MHND_MASTER_STR-MAHNA sy-vline 
WA_MHND_MASTER_STR-GMVDT sy-vline 
WA_MHND_MASTER_STR-MABER_KNB5 sy-vline 
WA_MHND_MASTER_STR-MANSP_KNB5 sy-vline 
WA_MHND_MASTER_STR-MADAT_KNB5 sy-vline 
WA_MHND_MASTER_STR-MAHNS_KNB5 sy-vline 
WA_MHND_MASTER_STR-EARLIEST_NEXT_MADAT sy-vline 
WA_MHND_MASTER_STR-KNRMA_KNB5 sy-vline 
WA_MHND_MASTER_STR-MAX_MAHNS sy-vline 
WA_MHND_MASTER_STR-KULEP_T047A sy-vline 
WA_MHND_MASTER_STR-XNUMS_T047A sy-vline 
WA_MHND_MASTER_STR-UMSKD_T047A sy-vline 
WA_MHND_MASTER_STR-UMSKK_T047A sy-vline 
WA_MHND_MASTER_STR-LIFNR sy-vline 
WA_MHND_MASTER_STR-KUNNR_LFA1 sy-vline 
WA_MHND_MASTER_STR-XVERR_LFB1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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