ABAP Select data from SAP table P12_EL01_P01G into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P12_EL01_P01G 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 P12_EL01_P01G. 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 P12_EL01_P01G 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_P12_EL01_P01G TYPE STANDARD TABLE OF P12_EL01_P01G,
      WA_P12_EL01_P01G TYPE P12_EL01_P01G,
      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: <P12_EL01_P01G> TYPE P12_EL01_P01G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P12_EL01_P01G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P12_EL01_P01G
  INTO TABLE IT_P12_EL01_P01G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P12_EL01_P01G
*  INTO TABLE @DATA(IT_P12_EL01_P01G2).
*--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_P12_EL01_P01G INDEX 1 INTO DATA(WA_P12_EL01_P01G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P12_EL01_P01G ASSIGNING <P12_EL01_P01G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P12_EL01_P01G>-P01G01 = 1.
<P12_EL01_P01G>-P01G02 = 1.
<P12_EL01_P01G>-P01G03 = 1.
<P12_EL01_P01G>-P01G04 = 1.
<P12_EL01_P01G>-P01G05 = 1.

ENDLOOP.

LOOP AT IT_P12_EL01_P01G INTO WA_P12_EL01_P01G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P12_EL01_P01G-P01G06, sy-vline,
  WA_P12_EL01_P01G-P01G07, sy-vline,
  WA_P12_EL01_P01G-P01G08, sy-vline,
  WA_P12_EL01_P01G-P01G09, sy-vline,
  WA_P12_EL01_P01G-P01G10, sy-vline,
  WA_P12_EL01_P01G-P01G11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P12_EL01_P01G 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_P12_EL01_P01G 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_P12_EL01_P01G INTO WA_P12_EL01_P01G.


*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_P12_EL01_P01G_STR, 
P01G01 TYPE STRING,
P01G02 TYPE STRING,
P01G03 TYPE STRING,
P01G04 TYPE STRING,
P01G05 TYPE STRING,
P01G06 TYPE STRING,
P01G07 TYPE STRING,
P01G08 TYPE STRING,
P01G09 TYPE STRING,
P01G10 TYPE STRING,
P01G11 TYPE STRING,
P01G12 TYPE STRING,
P01G13 TYPE STRING,
P01G14 TYPE STRING,
P01G15 TYPE STRING,
P01G16 TYPE STRING,
P01G17 TYPE STRING,
P01G18 TYPE STRING,
P01G19 TYPE STRING,
P01G20 TYPE STRING,
P01G21 TYPE STRING,
P01G22 TYPE STRING,
P01G23 TYPE STRING,
P01G24 TYPE STRING,
P01G25 TYPE STRING,
P01G26 TYPE STRING,
P01G27 TYPE STRING,
P01G28 TYPE STRING,
P01G29 TYPE STRING,
P01G30 TYPE STRING,
P01G31 TYPE STRING,
P01G32 TYPE STRING,
P01G33 TYPE STRING,
P01G34 TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P12_EL01_P01G_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_P12_EL01_P01G_STR-P01G01 sy-vline 
WA_P12_EL01_P01G_STR-P01G02 sy-vline 
WA_P12_EL01_P01G_STR-P01G03 sy-vline 
WA_P12_EL01_P01G_STR-P01G04 sy-vline 
WA_P12_EL01_P01G_STR-P01G05 sy-vline 
WA_P12_EL01_P01G_STR-P01G06 sy-vline 
WA_P12_EL01_P01G_STR-P01G07 sy-vline 
WA_P12_EL01_P01G_STR-P01G08 sy-vline 
WA_P12_EL01_P01G_STR-P01G09 sy-vline 
WA_P12_EL01_P01G_STR-P01G10 sy-vline 
WA_P12_EL01_P01G_STR-P01G11 sy-vline 
WA_P12_EL01_P01G_STR-P01G12 sy-vline 
WA_P12_EL01_P01G_STR-P01G13 sy-vline 
WA_P12_EL01_P01G_STR-P01G14 sy-vline 
WA_P12_EL01_P01G_STR-P01G15 sy-vline 
WA_P12_EL01_P01G_STR-P01G16 sy-vline 
WA_P12_EL01_P01G_STR-P01G17 sy-vline 
WA_P12_EL01_P01G_STR-P01G18 sy-vline 
WA_P12_EL01_P01G_STR-P01G19 sy-vline 
WA_P12_EL01_P01G_STR-P01G20 sy-vline 
WA_P12_EL01_P01G_STR-P01G21 sy-vline 
WA_P12_EL01_P01G_STR-P01G22 sy-vline 
WA_P12_EL01_P01G_STR-P01G23 sy-vline 
WA_P12_EL01_P01G_STR-P01G24 sy-vline 
WA_P12_EL01_P01G_STR-P01G25 sy-vline 
WA_P12_EL01_P01G_STR-P01G26 sy-vline 
WA_P12_EL01_P01G_STR-P01G27 sy-vline 
WA_P12_EL01_P01G_STR-P01G28 sy-vline 
WA_P12_EL01_P01G_STR-P01G29 sy-vline 
WA_P12_EL01_P01G_STR-P01G30 sy-vline 
WA_P12_EL01_P01G_STR-P01G31 sy-vline 
WA_P12_EL01_P01G_STR-P01G32 sy-vline 
WA_P12_EL01_P01G_STR-P01G33 sy-vline 
WA_P12_EL01_P01G_STR-P01G34 sy-vline 
WA_P12_EL01_P01G_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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