ABAP Select data from SAP table P01C_IEALT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01C_IEALT 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 P01C_IEALT. 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 P01C_IEALT 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_P01C_IEALT TYPE STANDARD TABLE OF P01C_IEALT,
      WA_P01C_IEALT TYPE P01C_IEALT,
      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: <P01C_IEALT> TYPE P01C_IEALT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01C_IEALT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01C_IEALT
  INTO TABLE IT_P01C_IEALT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01C_IEALT
*  INTO TABLE @DATA(IT_P01C_IEALT2).
*--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_P01C_IEALT INDEX 1 INTO DATA(WA_P01C_IEALT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01C_IEALT ASSIGNING <P01C_IEALT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01C_IEALT>-NMALT = 1.
<P01C_IEALT>-NMAFR = 1.
<P01C_IEALT>-NMAMA = 1.
<P01C_IEALT>-VMAFR = 1.
<P01C_IEALT>-VMAMA = 1.

ENDLOOP.

LOOP AT IT_P01C_IEALT INTO WA_P01C_IEALT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01C_IEALT-FEALT, sy-vline,
  WA_P01C_IEALT-VJJAB, sy-vline,
  WA_P01C_IEALT-FEAFR, sy-vline,
  WA_P01C_IEALT-FEAMA, sy-vline,
  WA_P01C_IEALT-FEAUA, sy-vline,
  WA_P01C_IEALT-ALTGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01C_IEALT 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_P01C_IEALT 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_P01C_IEALT INTO WA_P01C_IEALT.


*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_P01C_IEALT_STR, 
NMALT TYPE STRING,
NMAFR TYPE STRING,
NMAMA TYPE STRING,
VMAFR TYPE STRING,
VMAMA TYPE STRING,
FEALT TYPE STRING,
VJJAB TYPE STRING,
FEAFR TYPE STRING,
FEAMA TYPE STRING,
FEAUA TYPE STRING,
ALTGR TYPE STRING,
VALTG TYPE STRING,
NUMID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01C_IEALT_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_P01C_IEALT_STR-NMALT sy-vline 
WA_P01C_IEALT_STR-NMAFR sy-vline 
WA_P01C_IEALT_STR-NMAMA sy-vline 
WA_P01C_IEALT_STR-VMAFR sy-vline 
WA_P01C_IEALT_STR-VMAMA sy-vline 
WA_P01C_IEALT_STR-FEALT sy-vline 
WA_P01C_IEALT_STR-VJJAB sy-vline 
WA_P01C_IEALT_STR-FEAFR sy-vline 
WA_P01C_IEALT_STR-FEAMA sy-vline 
WA_P01C_IEALT_STR-FEAUA sy-vline 
WA_P01C_IEALT_STR-ALTGR sy-vline 
WA_P01C_IEALT_STR-VALTG sy-vline 
WA_P01C_IEALT_STR-NUMID sy-vline      INTO ld_text SEPARATED BY SPACE.

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