ABAP Select data from SAP table P08P1_MEHISTORY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08P1_MEHISTORY 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 P08P1_MEHISTORY. 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 P08P1_MEHISTORY 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_P08P1_MEHISTORY TYPE STANDARD TABLE OF P08P1_MEHISTORY,
      WA_P08P1_MEHISTORY TYPE P08P1_MEHISTORY,
      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: <P08P1_MEHISTORY> TYPE P08P1_MEHISTORY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08P1_MEHISTORY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08P1_MEHISTORY
  INTO TABLE IT_P08P1_MEHISTORY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08P1_MEHISTORY
*  INTO TABLE @DATA(IT_P08P1_MEHISTORY2).
*--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_P08P1_MEHISTORY INDEX 1 INTO DATA(WA_P08P1_MEHISTORY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08P1_MEHISTORY ASSIGNING <P08P1_MEHISTORY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08P1_MEHISTORY>-BDMES = 1.
<P08P1_MEHISTORY>-EDMES = 1.
<P08P1_MEHISTORY>-PERNR1 = 1.
<P08P1_MEHISTORY>-STATU1 = 1.
<P08P1_MEHISTORY>-PERNR2 = 1.

ENDLOOP.

LOOP AT IT_P08P1_MEHISTORY INTO WA_P08P1_MEHISTORY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08P1_MEHISTORY-STATU2, sy-vline,
  WA_P08P1_MEHISTORY-PERNR3, sy-vline,
  WA_P08P1_MEHISTORY-STATU3, sy-vline,
  WA_P08P1_MEHISTORY-PERNR4, sy-vline,
  WA_P08P1_MEHISTORY-STATU4, sy-vline,
  WA_P08P1_MEHISTORY-PERNR5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08P1_MEHISTORY 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_P08P1_MEHISTORY 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_P08P1_MEHISTORY INTO WA_P08P1_MEHISTORY.


*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_P08P1_MEHISTORY_STR, 
BDMES TYPE STRING,
EDMES TYPE STRING,
PERNR1 TYPE STRING,
STATU1 TYPE STRING,
PERNR2 TYPE STRING,
STATU2 TYPE STRING,
PERNR3 TYPE STRING,
STATU3 TYPE STRING,
PERNR4 TYPE STRING,
STATU4 TYPE STRING,
PERNR5 TYPE STRING,
STATU5 TYPE STRING,
PERNR6 TYPE STRING,
STATU6 TYPE STRING,
PERNR7 TYPE STRING,
STATU7 TYPE STRING,
PERNR8 TYPE STRING,
STATU8 TYPE STRING,
PERNR9 TYPE STRING,
STATU9 TYPE STRING,
PERNR10 TYPE STRING,
STATU10 TYPE STRING,
PERNR11 TYPE STRING,
STATU11 TYPE STRING,
PERNR12 TYPE STRING,
STATU12 TYPE STRING,
PERNR13 TYPE STRING,
STATU13 TYPE STRING,
PERNR14 TYPE STRING,
STATU14 TYPE STRING,
PERNR15 TYPE STRING,
STATU15 TYPE STRING,
PERNR16 TYPE STRING,
STATU16 TYPE STRING,
PERNR17 TYPE STRING,
STATU17 TYPE STRING,
PERNR18 TYPE STRING,
STATU18 TYPE STRING,
PERNR19 TYPE STRING,
STATU19 TYPE STRING,
PERNR20 TYPE STRING,
STATU20 TYPE STRING,
PERNR21 TYPE STRING,
STATU21 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08P1_MEHISTORY_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_P08P1_MEHISTORY_STR-BDMES sy-vline 
WA_P08P1_MEHISTORY_STR-EDMES sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR1 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU1 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR2 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU2 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR3 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU3 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR4 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU4 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR5 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU5 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR6 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU6 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR7 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU7 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR8 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU8 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR9 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU9 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR10 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU10 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR11 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU11 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR12 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU12 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR13 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU13 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR14 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU14 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR15 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU15 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR16 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU16 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR17 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU17 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR18 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU18 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR19 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU19 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR20 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU20 sy-vline 
WA_P08P1_MEHISTORY_STR-PERNR21 sy-vline 
WA_P08P1_MEHISTORY_STR-STATU21 sy-vline      INTO ld_text SEPARATED BY SPACE.

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