ABAP Select data from SAP table MYPL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MYPL
*  INTO TABLE @DATA(IT_MYPL2).
*--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_MYPL INDEX 1 INTO DATA(WA_MYPL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MYPL>-MANDT = 1.
<MYPL>-MYVER = 1.
<MYPL>-MYKEY = 1.
<MYPL>-MYPOOL = 1.
<MYPL>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MYPL-MYWRT, sy-vline,
  WA_MYPL-MYWRN, sy-vline,
  WA_MYPL-MYMNG, sy-vline,
  WA_MYPL-ABS01, sy-vline,
  WA_MYPL-ABS02, sy-vline,
  WA_MYPL-ABS03, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MYPL 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_MYPL 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_MYPL INTO WA_MYPL.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MYPL-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYPL-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MYPL-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MYPL-MEINS.
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_MYPL_STR, 
MANDT TYPE STRING,
MYVER TYPE STRING,
MYKEY TYPE STRING,
MYPOOL TYPE STRING,
GJAHR TYPE STRING,
MYWRT TYPE STRING,
MYWRN TYPE STRING,
MYMNG TYPE STRING,
ABS01 TYPE STRING,
ABS02 TYPE STRING,
ABS03 TYPE STRING,
MYPIX TYPE STRING,
MEINS TYPE STRING,
MYBAS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MYPL_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_MYPL_STR-MANDT sy-vline 
WA_MYPL_STR-MYVER sy-vline 
WA_MYPL_STR-MYKEY sy-vline 
WA_MYPL_STR-MYPOOL sy-vline 
WA_MYPL_STR-GJAHR sy-vline 
WA_MYPL_STR-MYWRT sy-vline 
WA_MYPL_STR-MYWRN sy-vline 
WA_MYPL_STR-MYMNG sy-vline 
WA_MYPL_STR-ABS01 sy-vline 
WA_MYPL_STR-ABS02 sy-vline 
WA_MYPL_STR-ABS03 sy-vline 
WA_MYPL_STR-MYPIX sy-vline 
WA_MYPL_STR-MEINS sy-vline 
WA_MYPL_STR-MYBAS sy-vline      INTO ld_text SEPARATED BY SPACE.

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