ABAP Select data from SAP table DSYAH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DSYAH
*  INTO TABLE @DATA(IT_DSYAH2).
*--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_DSYAH INDEX 1 INTO DATA(WA_DSYAH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DSYAH>-OUTLINE = 1.
<DSYAH>-ASPCT = 1.
<DSYAH>-SPRAS = 1.
<DSYAH>-VERSION = 1.
<DSYAH>-STATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DSYAH-MASTERLANG, sy-vline,
  WA_DSYAH-FUSER, sy-vline,
  WA_DSYAH-FDATE, sy-vline,
  WA_DSYAH-FTIME, sy-vline,
  WA_DSYAH-LUSER, sy-vline,
  WA_DSYAH-LDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DSYAH 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_DSYAH 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_DSYAH INTO WA_DSYAH.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DSYAH-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DSYAH-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DSYAH-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DSYAH-MASTERLANG.
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_DSYAH_STR, 
OUTLINE TYPE STRING,
ASPCT TYPE STRING,
SPRAS TYPE STRING,
VERSION TYPE STRING,
STATE TYPE STRING,
MASTERLANG TYPE STRING,
FUSER TYPE STRING,
FDATE TYPE STRING,
FTIME TYPE STRING,
LUSER TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
ATTRIBUT_1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DSYAH_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_DSYAH_STR-OUTLINE sy-vline 
WA_DSYAH_STR-ASPCT sy-vline 
WA_DSYAH_STR-SPRAS sy-vline 
WA_DSYAH_STR-VERSION sy-vline 
WA_DSYAH_STR-STATE sy-vline 
WA_DSYAH_STR-MASTERLANG sy-vline 
WA_DSYAH_STR-FUSER sy-vline 
WA_DSYAH_STR-FDATE sy-vline 
WA_DSYAH_STR-FTIME sy-vline 
WA_DSYAH_STR-LUSER sy-vline 
WA_DSYAH_STR-LDATE sy-vline 
WA_DSYAH_STR-LTIME sy-vline 
WA_DSYAH_STR-ATTRIBUT_1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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