ABAP Select data from SAP table DAC_S_TRACE_4052 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DAC_S_TRACE_4052 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 DAC_S_TRACE_4052. 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 DAC_S_TRACE_4052 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_DAC_S_TRACE_4052 TYPE STANDARD TABLE OF DAC_S_TRACE_4052,
      WA_DAC_S_TRACE_4052 TYPE DAC_S_TRACE_4052,
      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: <DAC_S_TRACE_4052> TYPE DAC_S_TRACE_4052.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DAC_S_TRACE_4052.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DAC_S_TRACE_4052
  INTO TABLE IT_DAC_S_TRACE_4052.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DAC_S_TRACE_4052
*  INTO TABLE @DATA(IT_DAC_S_TRACE_40522).
*--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_DAC_S_TRACE_4052 INDEX 1 INTO DATA(WA_DAC_S_TRACE_40522).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DAC_S_TRACE_4052 ASSIGNING <DAC_S_TRACE_4052>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DAC_S_TRACE_4052>-VBELN = 1.
<DAC_S_TRACE_4052>-POSNR = 1.
<DAC_S_TRACE_4052>-KUNRG = 1.
<DAC_S_TRACE_4052>-KUNAG = 1.
<DAC_S_TRACE_4052>-MATNR = 1.

ENDLOOP.

LOOP AT IT_DAC_S_TRACE_4052 INTO WA_DAC_S_TRACE_4052.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DAC_S_TRACE_4052-VGBEL, sy-vline,
  WA_DAC_S_TRACE_4052-VGPOS, sy-vline,
  WA_DAC_S_TRACE_4052-VKORG, sy-vline,
  WA_DAC_S_TRACE_4052-FKART, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DAC_S_TRACE_4052 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_DAC_S_TRACE_4052 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_DAC_S_TRACE_4052 INTO WA_DAC_S_TRACE_4052.


*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 ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DAC_S_TRACE_4052-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAC_S_TRACE_4052-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DAC_S_TRACE_4052-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAC_S_TRACE_4052-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNAG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DAC_S_TRACE_4052-KUNAG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAC_S_TRACE_4052-KUNAG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_DAC_S_TRACE_4052-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAC_S_TRACE_4052-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VGBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DAC_S_TRACE_4052-VGBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DAC_S_TRACE_4052-VGBEL.
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_DAC_S_TRACE_4052_STR, 
VBELN TYPE STRING,
POSNR TYPE STRING,
KUNRG TYPE STRING,
KUNAG TYPE STRING,
MATNR TYPE STRING,
VGBEL TYPE STRING,
VGPOS TYPE STRING,
VKORG TYPE STRING,
FKART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DAC_S_TRACE_4052_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_DAC_S_TRACE_4052_STR-VBELN sy-vline 
WA_DAC_S_TRACE_4052_STR-POSNR sy-vline 
WA_DAC_S_TRACE_4052_STR-KUNRG sy-vline 
WA_DAC_S_TRACE_4052_STR-KUNAG sy-vline 
WA_DAC_S_TRACE_4052_STR-MATNR sy-vline 
WA_DAC_S_TRACE_4052_STR-VGBEL sy-vline 
WA_DAC_S_TRACE_4052_STR-VGPOS sy-vline 
WA_DAC_S_TRACE_4052_STR-VKORG sy-vline 
WA_DAC_S_TRACE_4052_STR-FKART sy-vline      INTO ld_text SEPARATED BY SPACE.

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