ABAP Select data from SAP table MCPARTNER into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCPARTNER
*  INTO TABLE @DATA(IT_MCPARTNER2).
*--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_MCPARTNER INDEX 1 INTO DATA(WA_MCPARTNER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCPARTNER>-PKUNAG = 1.
<MCPARTNER>-PKUNWE = 1.
<MCPARTNER>-PKUNRE = 1.
<MCPARTNER>-PKUNRG = 1.
<MCPARTNER>-PSPDNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCPARTNER-PVRTNR, sy-vline,
  WA_MCPARTNER-PLAAG, sy-vline,
  WA_MCPARTNER-PLAWE, sy-vline,
  WA_MCPARTNER-PLARE, sy-vline,
  WA_MCPARTNER-PLARG, sy-vline,
  WA_MCPARTNER-PLASP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCPARTNER 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_MCPARTNER 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_MCPARTNER INTO WA_MCPARTNER.


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

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

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

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

*Conversion exit ALPHA, internal->external for field PSPDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MCPARTNER-PSPDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCPARTNER-PSPDNR.
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_MCPARTNER_STR, 
PKUNAG TYPE STRING,
PKUNWE TYPE STRING,
PKUNRE TYPE STRING,
PKUNRG TYPE STRING,
PSPDNR TYPE STRING,
PVRTNR TYPE STRING,
PLAAG TYPE STRING,
PLAWE TYPE STRING,
PLARE TYPE STRING,
PLARG TYPE STRING,
PLASP TYPE STRING,
PLAVE TYPE STRING,
PABLA TYPE STRING,
PZONE TYPE STRING,
PDUMMY TYPE STRING,
PZPERS TYPE STRING,
PLAZM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCPARTNER_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_MCPARTNER_STR-PKUNAG sy-vline 
WA_MCPARTNER_STR-PKUNWE sy-vline 
WA_MCPARTNER_STR-PKUNRE sy-vline 
WA_MCPARTNER_STR-PKUNRG sy-vline 
WA_MCPARTNER_STR-PSPDNR sy-vline 
WA_MCPARTNER_STR-PVRTNR sy-vline 
WA_MCPARTNER_STR-PLAAG sy-vline 
WA_MCPARTNER_STR-PLAWE sy-vline 
WA_MCPARTNER_STR-PLARE sy-vline 
WA_MCPARTNER_STR-PLARG sy-vline 
WA_MCPARTNER_STR-PLASP sy-vline 
WA_MCPARTNER_STR-PLAVE sy-vline 
WA_MCPARTNER_STR-PABLA sy-vline 
WA_MCPARTNER_STR-PZONE sy-vline 
WA_MCPARTNER_STR-PDUMMY sy-vline 
WA_MCPARTNER_STR-PZPERS sy-vline 
WA_MCPARTNER_STR-PLAZM sy-vline      INTO ld_text SEPARATED BY SPACE.

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