ABAP Select data from SAP table ATPC_MDUR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATPC_MDUR
*  INTO TABLE @DATA(IT_ATPC_MDUR2).
*--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_ATPC_MDUR INDEX 1 INTO DATA(WA_ATPC_MDUR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATPC_MDUR>-CLIENT = 1.
<ATPC_MDUR>-DELNR = 1.
<ATPC_MDUR>-DELPS = 1.
<ATPC_MDUR>-ATPCAT = 1.
<ATPC_MDUR>-SORT1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATPC_MDUR-SORT2, sy-vline,
  WA_ATPC_MDUR-MANDT, sy-vline,
  WA_ATPC_MDUR-MATNR, sy-vline,
  WA_ATPC_MDUR-WERKS, sy-vline,
  WA_ATPC_MDUR-LGORT, sy-vline,
  WA_ATPC_MDUR-RSPOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATPC_MDUR 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_ATPC_MDUR 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_ATPC_MDUR INTO WA_ATPC_MDUR.


*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_ATPC_MDUR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATPC_MDUR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ATPC_MDUR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATPC_MDUR-LIFNR.
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_ATPC_MDUR_STR, 
CLIENT TYPE STRING,
DELNR TYPE STRING,
DELPS TYPE STRING,
ATPCAT TYPE STRING,
SORT1 TYPE STRING,
SORT2 TYPE STRING,
MANDT TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
RSPOS TYPE STRING,
RSNUM TYPE STRING,
RSART TYPE STRING,
BDART TYPE STRING,
SOBKZ TYPE STRING,
SSKEY TYPE STRING,
SSKEY_EXT TYPE STRING,
ATPDATE TYPE STRING,
BDMNG TYPE STRING,
SHKZG TYPE STRING,
ENMNG TYPE STRING,
CHARG TYPE STRING,
SGT_RCAT TYPE STRING,
SGT_SCAT TYPE STRING,
VMENG TYPE STRING,
LIFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATPC_MDUR_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_ATPC_MDUR_STR-CLIENT sy-vline 
WA_ATPC_MDUR_STR-DELNR sy-vline 
WA_ATPC_MDUR_STR-DELPS sy-vline 
WA_ATPC_MDUR_STR-ATPCAT sy-vline 
WA_ATPC_MDUR_STR-SORT1 sy-vline 
WA_ATPC_MDUR_STR-SORT2 sy-vline 
WA_ATPC_MDUR_STR-MANDT sy-vline 
WA_ATPC_MDUR_STR-MATNR sy-vline 
WA_ATPC_MDUR_STR-WERKS sy-vline 
WA_ATPC_MDUR_STR-LGORT sy-vline 
WA_ATPC_MDUR_STR-RSPOS sy-vline 
WA_ATPC_MDUR_STR-RSNUM sy-vline 
WA_ATPC_MDUR_STR-RSART sy-vline 
WA_ATPC_MDUR_STR-BDART sy-vline 
WA_ATPC_MDUR_STR-SOBKZ sy-vline 
WA_ATPC_MDUR_STR-SSKEY sy-vline 
WA_ATPC_MDUR_STR-SSKEY_EXT sy-vline 
WA_ATPC_MDUR_STR-ATPDATE sy-vline 
WA_ATPC_MDUR_STR-BDMNG sy-vline 
WA_ATPC_MDUR_STR-SHKZG sy-vline 
WA_ATPC_MDUR_STR-ENMNG sy-vline 
WA_ATPC_MDUR_STR-CHARG sy-vline 
WA_ATPC_MDUR_STR-SGT_RCAT sy-vline 
WA_ATPC_MDUR_STR-SGT_SCAT sy-vline 
WA_ATPC_MDUR_STR-VMENG sy-vline 
WA_ATPC_MDUR_STR-LIFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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