ABAP Select data from SAP table P08P_ME_NI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P08P_ME_NI 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 P08P_ME_NI. 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 P08P_ME_NI 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_P08P_ME_NI TYPE STANDARD TABLE OF P08P_ME_NI,
      WA_P08P_ME_NI TYPE P08P_ME_NI,
      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: <P08P_ME_NI> TYPE P08P_ME_NI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P08P_ME_NI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P08P_ME_NI
  INTO TABLE IT_P08P_ME_NI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P08P_ME_NI
*  INTO TABLE @DATA(IT_P08P_ME_NI2).
*--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_P08P_ME_NI INDEX 1 INTO DATA(WA_P08P_ME_NI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P08P_ME_NI ASSIGNING <P08P_ME_NI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P08P_ME_NI>-PERNR = 1.
<P08P_ME_NI>-MAINC = 1.
<P08P_ME_NI>-INPER = 1.
<P08P_ME_NI>-LS_INPER = 1.
<P08P_ME_NI>-PAYDATE_MAIN = 1.

ENDLOOP.

LOOP AT IT_P08P_ME_NI INTO WA_P08P_ME_NI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P08P_ME_NI-PAYDATE_SECOND, sy-vline,
  WA_P08P_ME_NI-C0, sy-vline,
  WA_P08P_ME_NI-C1, sy-vline,
  WA_P08P_ME_NI-V0, sy-vline,
  WA_P08P_ME_NI-WPBP, sy-vline,
  WA_P08P_ME_NI-RT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P08P_ME_NI 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_P08P_ME_NI 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_P08P_ME_NI INTO WA_P08P_ME_NI.


*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_P08P_ME_NI_STR, 
PERNR TYPE STRING,
MAINC TYPE STRING,
INPER TYPE STRING,
LS_INPER TYPE STRING,
PAYDATE_MAIN TYPE STRING,
PAYDATE_SECOND TYPE STRING,
C0 TYPE STRING,
C1 TYPE STRING,
V0 TYPE STRING,
WPBP TYPE STRING,
RT TYPE STRING,
NIPAY TYPE STRING,
NIC TYPE STRING,
NIRA TYPE STRING,
CNIC TYPE STRING,
NIPAY_ORG TYPE STRING,
NIC_ORG TYPE STRING,
RTI TYPE STRING,
RTINI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P08P_ME_NI_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_P08P_ME_NI_STR-PERNR sy-vline 
WA_P08P_ME_NI_STR-MAINC sy-vline 
WA_P08P_ME_NI_STR-INPER sy-vline 
WA_P08P_ME_NI_STR-LS_INPER sy-vline 
WA_P08P_ME_NI_STR-PAYDATE_MAIN sy-vline 
WA_P08P_ME_NI_STR-PAYDATE_SECOND sy-vline 
WA_P08P_ME_NI_STR-C0 sy-vline 
WA_P08P_ME_NI_STR-C1 sy-vline 
WA_P08P_ME_NI_STR-V0 sy-vline 
WA_P08P_ME_NI_STR-WPBP sy-vline 
WA_P08P_ME_NI_STR-RT sy-vline 
WA_P08P_ME_NI_STR-NIPAY sy-vline 
WA_P08P_ME_NI_STR-NIC sy-vline 
WA_P08P_ME_NI_STR-NIRA sy-vline 
WA_P08P_ME_NI_STR-CNIC sy-vline 
WA_P08P_ME_NI_STR-NIPAY_ORG sy-vline 
WA_P08P_ME_NI_STR-NIC_ORG sy-vline 
WA_P08P_ME_NI_STR-RTI sy-vline 
WA_P08P_ME_NI_STR-RTINI sy-vline      INTO ld_text SEPARATED BY SPACE.

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