ABAP Select data from SAP table ISAUTOH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISAUTOH
*  INTO TABLE @DATA(IT_ISAUTOH2).
*--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_ISAUTOH INDEX 1 INTO DATA(WA_ISAUTOH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISAUTOH>-CPUDT = 1.
<ISAUTOH>-CPUTM = 1.
<ISAUTOH>-STPIN = 1.
<ISAUTOH>-BRSVZ = 1.
<ISAUTOH>-ERSGR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISAUTOH-LGBZO, sy-vline,
  WA_ISAUTOH-INIDT, sy-vline,
  WA_ISAUTOH-INITM, sy-vline,
  WA_ISAUTOH-WEFZMIT, sy-vline,
  WA_ISAUTOH-DISPO, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_ISAUTOH 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_ISAUTOH 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_ISAUTOH INTO WA_ISAUTOH.


*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_ISAUTOH_STR, 
CPUDT TYPE STRING,
CPUTM TYPE STRING,
STPIN TYPE STRING,
BRSVZ TYPE STRING,
ERSGR TYPE STRING,
LGBZO TYPE STRING,
INIDT TYPE STRING,
INITM TYPE STRING,
WEFZMIT TYPE STRING,
DISPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISAUTOH_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_ISAUTOH_STR-CPUDT sy-vline 
WA_ISAUTOH_STR-CPUTM sy-vline 
WA_ISAUTOH_STR-STPIN sy-vline 
WA_ISAUTOH_STR-BRSVZ sy-vline 
WA_ISAUTOH_STR-ERSGR sy-vline 
WA_ISAUTOH_STR-LGBZO sy-vline 
WA_ISAUTOH_STR-INIDT sy-vline 
WA_ISAUTOH_STR-INITM sy-vline 
WA_ISAUTOH_STR-WEFZMIT sy-vline 
WA_ISAUTOH_STR-DISPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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