ABAP Select data from SAP table AMDES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AMDES
*  INTO TABLE @DATA(IT_AMDES2).
*--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_AMDES INDEX 1 INTO DATA(WA_AMDES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AMDES>-PROCGUID = 1.
<AMDES>-DESTIN = 1.
<AMDES>-PPROCGUID = 1.
<AMDES>-RFCHOST = 1.
<AMDES>-R3RELEASE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AMDES-DESC_TEXT, sy-vline,
  WA_AMDES-EXTRELEASE, sy-vline,
  WA_AMDES-DESTDATE, sy-vline,
  WA_AMDES-DESTTIME, sy-vline,
  WA_AMDES-DESTSIGN, sy-vline,
  WA_AMDES-DESTDELTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AMDES 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_AMDES 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_AMDES INTO WA_AMDES.


*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_AMDES_STR, 
PROCGUID TYPE STRING,
DESTIN TYPE STRING,
PPROCGUID TYPE STRING,
RFCHOST TYPE STRING,
R3RELEASE TYPE STRING,
DESC_TEXT TYPE STRING,
EXTRELEASE TYPE STRING,
DESTDATE TYPE STRING,
DESTTIME TYPE STRING,
DESTSIGN TYPE STRING,
DESTDELTA TYPE STRING,
CPU_ANZ TYPE STRING,
PHYS_MEM TYPE STRING,
MANDT TYPE STRING,
UNAME TYPE STRING,
ALL_SERVER TYPE STRING,
INSPECID TYPE STRING,
INSPECVERS TYPE STRING,
CIUSER TYPE STRING,
CNT_ERROR TYPE STRING,
CNT_WARN TYPE STRING,
CNT_INFO TYPE STRING,
INSPECID_STAT TYPE STRING,
INSPECVERS_STAT TYPE STRING,
CIUSER_STAT TYPE STRING,
CNT_ERROR_STAT TYPE STRING,
CNT_WARN_STAT TYPE STRING,
CNT_INFO_STAT TYPE STRING,
EC_OBJ_NAME TYPE STRING,
APPR_INDEX TYPE STRING,
COMPL_WHERE TYPE STRING,
BUFFER_USED TYPE STRING,
IDENT_SELECT TYPE STRING,
PARALLEL_PROC TYPE STRING,
LINEAR_DEP_MEM TYPE STRING,
LINEAR_DEP_TIME TYPE STRING,
ROUNDTRIP_WAN TYPE STRING,
ROUNDTRIP_SERVER TYPE STRING,
AVG_RESPTIME TYPE STRING,
SIZING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AMDES_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_AMDES_STR-PROCGUID sy-vline 
WA_AMDES_STR-DESTIN sy-vline 
WA_AMDES_STR-PPROCGUID sy-vline 
WA_AMDES_STR-RFCHOST sy-vline 
WA_AMDES_STR-R3RELEASE sy-vline 
WA_AMDES_STR-DESC_TEXT sy-vline 
WA_AMDES_STR-EXTRELEASE sy-vline 
WA_AMDES_STR-DESTDATE sy-vline 
WA_AMDES_STR-DESTTIME sy-vline 
WA_AMDES_STR-DESTSIGN sy-vline 
WA_AMDES_STR-DESTDELTA sy-vline 
WA_AMDES_STR-CPU_ANZ sy-vline 
WA_AMDES_STR-PHYS_MEM sy-vline 
WA_AMDES_STR-MANDT sy-vline 
WA_AMDES_STR-UNAME sy-vline 
WA_AMDES_STR-ALL_SERVER sy-vline 
WA_AMDES_STR-INSPECID sy-vline 
WA_AMDES_STR-INSPECVERS sy-vline 
WA_AMDES_STR-CIUSER sy-vline 
WA_AMDES_STR-CNT_ERROR sy-vline 
WA_AMDES_STR-CNT_WARN sy-vline 
WA_AMDES_STR-CNT_INFO sy-vline 
WA_AMDES_STR-INSPECID_STAT sy-vline 
WA_AMDES_STR-INSPECVERS_STAT sy-vline 
WA_AMDES_STR-CIUSER_STAT sy-vline 
WA_AMDES_STR-CNT_ERROR_STAT sy-vline 
WA_AMDES_STR-CNT_WARN_STAT sy-vline 
WA_AMDES_STR-CNT_INFO_STAT sy-vline 
WA_AMDES_STR-EC_OBJ_NAME sy-vline 
WA_AMDES_STR-APPR_INDEX sy-vline 
WA_AMDES_STR-COMPL_WHERE sy-vline 
WA_AMDES_STR-BUFFER_USED sy-vline 
WA_AMDES_STR-IDENT_SELECT sy-vline 
WA_AMDES_STR-PARALLEL_PROC sy-vline 
WA_AMDES_STR-LINEAR_DEP_MEM sy-vline 
WA_AMDES_STR-LINEAR_DEP_TIME sy-vline 
WA_AMDES_STR-ROUNDTRIP_WAN sy-vline 
WA_AMDES_STR-ROUNDTRIP_SERVER sy-vline 
WA_AMDES_STR-AVG_RESPTIME sy-vline 
WA_AMDES_STR-SIZING sy-vline      INTO ld_text SEPARATED BY SPACE.

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