ABAP Select data from SAP table P12_EL01_P01C 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_P01C 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_P01C. 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_P01C 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_P01C TYPE STANDARD TABLE OF P12_EL01_P01C,
      WA_P12_EL01_P01C TYPE P12_EL01_P01C,
      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_P01C> TYPE P12_EL01_P01C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P12_EL01_P01C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P12_EL01_P01C
  INTO TABLE IT_P12_EL01_P01C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P12_EL01_P01C
*  INTO TABLE @DATA(IT_P12_EL01_P01C2).
*--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_P01C INDEX 1 INTO DATA(WA_P12_EL01_P01C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P12_EL01_P01C ASSIGNING <P12_EL01_P01C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P12_EL01_P01C>-P01C01 = 1.
<P12_EL01_P01C>-P01C02 = 1.
<P12_EL01_P01C>-P01C03 = 1.
<P12_EL01_P01C>-P01C04 = 1.
<P12_EL01_P01C>-P01C05 = 1.

ENDLOOP.

LOOP AT IT_P12_EL01_P01C INTO WA_P12_EL01_P01C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P12_EL01_P01C-P01C06, sy-vline,
  WA_P12_EL01_P01C-P01C07, sy-vline,
  WA_P12_EL01_P01C-P01C08, sy-vline,
  WA_P12_EL01_P01C-P01C09, sy-vline,
  WA_P12_EL01_P01C-P01C10, sy-vline,
  WA_P12_EL01_P01C-P01C11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P12_EL01_P01C 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_P01C 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_P01C INTO WA_P12_EL01_P01C.


*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_P01C_STR, 
P01C01 TYPE STRING,
P01C02 TYPE STRING,
P01C03 TYPE STRING,
P01C04 TYPE STRING,
P01C05 TYPE STRING,
P01C06 TYPE STRING,
P01C07 TYPE STRING,
P01C08 TYPE STRING,
P01C09 TYPE STRING,
P01C10 TYPE STRING,
P01C11 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P12_EL01_P01C_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_P01C_STR-P01C01 sy-vline 
WA_P12_EL01_P01C_STR-P01C02 sy-vline 
WA_P12_EL01_P01C_STR-P01C03 sy-vline 
WA_P12_EL01_P01C_STR-P01C04 sy-vline 
WA_P12_EL01_P01C_STR-P01C05 sy-vline 
WA_P12_EL01_P01C_STR-P01C06 sy-vline 
WA_P12_EL01_P01C_STR-P01C07 sy-vline 
WA_P12_EL01_P01C_STR-P01C08 sy-vline 
WA_P12_EL01_P01C_STR-P01C09 sy-vline 
WA_P12_EL01_P01C_STR-P01C10 sy-vline 
WA_P12_EL01_P01C_STR-P01C11 sy-vline      INTO ld_text SEPARATED BY SPACE.

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