ABAP Select data from SAP table P512E into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P512E 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 P512E. 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 P512E 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_P512E TYPE STANDARD TABLE OF P512E,
      WA_P512E TYPE P512E,
      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: <P512E> TYPE P512E.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P512E.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P512E
  INTO TABLE IT_P512E.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P512E
*  INTO TABLE @DATA(IT_P512E2).
*--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_P512E INDEX 1 INTO DATA(WA_P512E2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P512E ASSIGNING <P512E>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P512E>-LGART = 1.
<P512E>-TABNA = 1.
<P512E>-LFDNR = 1.
<P512E>-WINDO = 1.
<P512E>-GRPPE = 1.

ENDLOOP.

LOOP AT IT_P512E INTO WA_P512E.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P512E-SEQNO, sy-vline,
  WA_P512E-SEQN2, sy-vline,
  WA_P512E-LTYPE, sy-vline,
  WA_P512E-COLNO, sy-vline,
  WA_P512E-SLART, sy-vline,
  WA_P512E-RECHZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P512E 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_P512E 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_P512E INTO WA_P512E.


*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_P512E_STR, 
LGART TYPE STRING,
TABNA TYPE STRING,
LFDNR TYPE STRING,
WINDO TYPE STRING,
GRPPE TYPE STRING,
SEQNO TYPE STRING,
SEQN2 TYPE STRING,
LTYPE TYPE STRING,
COLNO TYPE STRING,
SLART TYPE STRING,
RECHZ TYPE STRING,
FCONV TYPE STRING,
REGEL TYPE STRING,
SSPLT TYPE STRING,
DSPLT TYPE STRING,
DIFAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P512E_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_P512E_STR-LGART sy-vline 
WA_P512E_STR-TABNA sy-vline 
WA_P512E_STR-LFDNR sy-vline 
WA_P512E_STR-WINDO sy-vline 
WA_P512E_STR-GRPPE sy-vline 
WA_P512E_STR-SEQNO sy-vline 
WA_P512E_STR-SEQN2 sy-vline 
WA_P512E_STR-LTYPE sy-vline 
WA_P512E_STR-COLNO sy-vline 
WA_P512E_STR-SLART sy-vline 
WA_P512E_STR-RECHZ sy-vline 
WA_P512E_STR-FCONV sy-vline 
WA_P512E_STR-REGEL sy-vline 
WA_P512E_STR-SSPLT sy-vline 
WA_P512E_STR-DSPLT sy-vline 
WA_P512E_STR-DIFAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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