ABAP Select data from SAP table IATTACH_MAIN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IATTACH_MAIN
*  INTO TABLE @DATA(IT_IATTACH_MAIN2).
*--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_IATTACH_MAIN INDEX 1 INTO DATA(WA_IATTACH_MAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IATTACH_MAIN>-SAPCLIENT = 1.
<IATTACH_MAIN>-OPNCTLGIMAGEID = 1.
<IATTACH_MAIN>-OPNCTLGITEMID = 1.
<IATTACH_MAIN>-OPNCTLGMAINIMAGENAME = 1.
<IATTACH_MAIN>-OPNCTLGMAINIMAGEURL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IATTACH_MAIN-OPNCTLGIMAGEMIMETYPE, sy-vline,
  WA_IATTACH_MAIN-OPNCTLGATTACHMENTTYPE, sy-vline,
  WA_IATTACH_MAIN-LANGUAGE, sy-vline,
  WA_IATTACH_MAIN-OPNCTLGMAINIMAGEID, sy-vline,
  WA_IATTACH_MAIN-OPNCTLGWEBSERVICEID, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_IATTACH_MAIN 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_IATTACH_MAIN 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_IATTACH_MAIN INTO WA_IATTACH_MAIN.


*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 LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IATTACH_MAIN-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IATTACH_MAIN-LANGUAGE.
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_IATTACH_MAIN_STR, 
SAPCLIENT TYPE STRING,
OPNCTLGIMAGEID TYPE STRING,
OPNCTLGITEMID TYPE STRING,
OPNCTLGMAINIMAGENAME TYPE STRING,
OPNCTLGMAINIMAGEURL TYPE STRING,
OPNCTLGIMAGEMIMETYPE TYPE STRING,
OPNCTLGATTACHMENTTYPE TYPE STRING,
LANGUAGE TYPE STRING,
OPNCTLGMAINIMAGEID TYPE STRING,
OPNCTLGWEBSERVICEID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IATTACH_MAIN_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_IATTACH_MAIN_STR-SAPCLIENT sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGIMAGEID sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGITEMID sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGMAINIMAGENAME sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGMAINIMAGEURL sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGIMAGEMIMETYPE sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGATTACHMENTTYPE sy-vline 
WA_IATTACH_MAIN_STR-LANGUAGE sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGMAINIMAGEID sy-vline 
WA_IATTACH_MAIN_STR-OPNCTLGWEBSERVICEID sy-vline      INTO ld_text SEPARATED BY SPACE.

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