ABAP Select data from SAP table SXER_30W into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SXER_30W 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 SXER_30W. 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 SXER_30W 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_SXER_30W TYPE STANDARD TABLE OF SXER_30W,
      WA_SXER_30W TYPE SXER_30W,
      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: <SXER_30W> TYPE SXER_30W.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SXER_30W.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SXER_30W
  INTO TABLE IT_SXER_30W.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SXER_30W
*  INTO TABLE @DATA(IT_SXER_30W2).
*--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_SXER_30W INDEX 1 INTO DATA(WA_SXER_30W2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SXER_30W ASSIGNING <SXER_30W>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SXER_30W>-VISNAME = 1.
<SXER_30W>-PROCTIME = 1.
<SXER_30W>-PROCDATE = 1.
<SXER_30W>-TNEF = 1.
<SXER_30W>-MIME = 1.

ENDLOOP.

LOOP AT IT_SXER_30W INTO WA_SXER_30W.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SXER_30W-UUENCODE, sy-vline,
  WA_SXER_30W-CODE, sy-vline,
  WA_SXER_30W-MSGV1, sy-vline,
  WA_SXER_30W-MSGV2, sy-vline,
  WA_SXER_30W-MSGV3, sy-vline,
  WA_SXER_30W-MSGV4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SXER_30W 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_SXER_30W 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_SXER_30W INTO WA_SXER_30W.


*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_SXER_30W_STR, 
VISNAME TYPE STRING,
PROCTIME TYPE STRING,
PROCDATE TYPE STRING,
TNEF TYPE STRING,
MIME TYPE STRING,
UUENCODE TYPE STRING,
CODE TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SXER_30W_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_SXER_30W_STR-VISNAME sy-vline 
WA_SXER_30W_STR-PROCTIME sy-vline 
WA_SXER_30W_STR-PROCDATE sy-vline 
WA_SXER_30W_STR-TNEF sy-vline 
WA_SXER_30W_STR-MIME sy-vline 
WA_SXER_30W_STR-UUENCODE sy-vline 
WA_SXER_30W_STR-CODE sy-vline 
WA_SXER_30W_STR-MSGV1 sy-vline 
WA_SXER_30W_STR-MSGV2 sy-vline 
WA_SXER_30W_STR-MSGV3 sy-vline 
WA_SXER_30W_STR-MSGV4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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