ABAP Select data from SAP table AIHPA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AIHPA
*  INTO TABLE @DATA(IT_AIHPA2).
*--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_AIHPA INDEX 1 INTO DATA(WA_AIHPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AIHPA>-MANDT = 1.
<AIHPA>-OBJNR = 1.
<AIHPA>-PARVW = 1.
<AIHPA>-COUNTER = 1.
<AIHPA>-OBTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AIHPA-PARNR, sy-vline,
  WA_AIHPA-INHER, sy-vline,
  WA_AIHPA-ERDAT, sy-vline,
  WA_AIHPA-ERZEIT, sy-vline,
  WA_AIHPA-ERNAM, sy-vline,
  WA_AIHPA-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AIHPA 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_AIHPA 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_AIHPA INTO WA_AIHPA.


*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.

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_AIHPA-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AIHPA-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AIHPA-PARNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AIHPA-PARNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_AIHPA-ADRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AIHPA-ADRNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AIHPA_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
PARVW TYPE STRING,
COUNTER TYPE STRING,
OBTYP TYPE STRING,
PARNR TYPE STRING,
INHER TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
AENAM TYPE STRING,
KZLOESCH TYPE STRING,
ADRNR TYPE STRING,
TZONSP TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AIHPA_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_AIHPA_STR-MANDT sy-vline 
WA_AIHPA_STR-OBJNR sy-vline 
WA_AIHPA_STR-PARVW sy-vline 
WA_AIHPA_STR-COUNTER sy-vline 
WA_AIHPA_STR-OBTYP sy-vline 
WA_AIHPA_STR-PARNR sy-vline 
WA_AIHPA_STR-INHER sy-vline 
WA_AIHPA_STR-ERDAT sy-vline 
WA_AIHPA_STR-ERZEIT sy-vline 
WA_AIHPA_STR-ERNAM sy-vline 
WA_AIHPA_STR-AEDAT sy-vline 
WA_AIHPA_STR-AEZEIT sy-vline 
WA_AIHPA_STR-AENAM sy-vline 
WA_AIHPA_STR-KZLOESCH sy-vline 
WA_AIHPA_STR-ADRNR sy-vline 
WA_AIHPA_STR-TZONSP sy-vline 
WA_AIHPA_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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