ABAP Select data from SAP table P11_MR2_02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P11_MR2_02 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 P11_MR2_02. 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 P11_MR2_02 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_P11_MR2_02 TYPE STANDARD TABLE OF P11_MR2_02,
      WA_P11_MR2_02 TYPE P11_MR2_02,
      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: <P11_MR2_02> TYPE P11_MR2_02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P11_MR2_02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P11_MR2_02
  INTO TABLE IT_P11_MR2_02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P11_MR2_02
*  INTO TABLE @DATA(IT_P11_MR2_022).
*--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_P11_MR2_02 INDEX 1 INTO DATA(WA_P11_MR2_022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P11_MR2_02 ASSIGNING <P11_MR2_02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P11_MR2_02>-RECTY = 1.
<P11_MR2_02>-PERID = 1.
<P11_MR2_02>-PERNR = 1.
<P11_MR2_02>-TWEEK = 1.
<P11_MR2_02>-INITC = 1.

ENDLOOP.

LOOP AT IT_P11_MR2_02 INTO WA_P11_MR2_02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P11_MR2_02-CLAS2, sy-vline,
  WA_P11_MR2_02-WEEK2, sy-vline,
  WA_P11_MR2_02-CLAS3, sy-vline,
  WA_P11_MR2_02-WEEK3, sy-vline,
  WA_P11_MR2_02-CLAS4, sy-vline,
  WA_P11_MR2_02-WEEK4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P11_MR2_02 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_P11_MR2_02 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_P11_MR2_02 INTO WA_P11_MR2_02.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P11_MR2_02_STR, 
RECTY TYPE STRING,
PERID TYPE STRING,
PERNR TYPE STRING,
TWEEK TYPE STRING,
INITC TYPE STRING,
CLAS2 TYPE STRING,
WEEK2 TYPE STRING,
CLAS3 TYPE STRING,
WEEK3 TYPE STRING,
CLAS4 TYPE STRING,
WEEK4 TYPE STRING,
T_TAX TYPE STRING,
TREFI TYPE STRING,
EEPRS TYPE STRING,
TOPRS TYPE STRING,
T_EARN TYPE STRING,
TXTBL TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
GBDAT TYPE STRING,
LINE0 TYPE STRING,
LINE1 TYPE STRING,
LINE2 TYPE STRING,
STARTD TYPE STRING,
LEAVED TYPE STRING,
TFATO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P11_MR2_02_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_P11_MR2_02_STR-RECTY sy-vline 
WA_P11_MR2_02_STR-PERID sy-vline 
WA_P11_MR2_02_STR-PERNR sy-vline 
WA_P11_MR2_02_STR-TWEEK sy-vline 
WA_P11_MR2_02_STR-INITC sy-vline 
WA_P11_MR2_02_STR-CLAS2 sy-vline 
WA_P11_MR2_02_STR-WEEK2 sy-vline 
WA_P11_MR2_02_STR-CLAS3 sy-vline 
WA_P11_MR2_02_STR-WEEK3 sy-vline 
WA_P11_MR2_02_STR-CLAS4 sy-vline 
WA_P11_MR2_02_STR-WEEK4 sy-vline 
WA_P11_MR2_02_STR-T_TAX sy-vline 
WA_P11_MR2_02_STR-TREFI sy-vline 
WA_P11_MR2_02_STR-EEPRS sy-vline 
WA_P11_MR2_02_STR-TOPRS sy-vline 
WA_P11_MR2_02_STR-T_EARN sy-vline 
WA_P11_MR2_02_STR-TXTBL sy-vline 
WA_P11_MR2_02_STR-NACHN sy-vline 
WA_P11_MR2_02_STR-VORNA sy-vline 
WA_P11_MR2_02_STR-GBDAT sy-vline 
WA_P11_MR2_02_STR-LINE0 sy-vline 
WA_P11_MR2_02_STR-LINE1 sy-vline 
WA_P11_MR2_02_STR-LINE2 sy-vline 
WA_P11_MR2_02_STR-STARTD sy-vline 
WA_P11_MR2_02_STR-LEAVED sy-vline 
WA_P11_MR2_02_STR-TFATO sy-vline      INTO ld_text SEPARATED BY SPACE.

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