ABAP Select data from SAP table DCTTX031L2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DCTTX031L2 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 DCTTX031L2. 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 DCTTX031L2 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_DCTTX031L2 TYPE STANDARD TABLE OF DCTTX031L2,
      WA_DCTTX031L2 TYPE DCTTX031L2,
      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: <DCTTX031L2> TYPE DCTTX031L2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DCTTX031L2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DCTTX031L2
  INTO TABLE IT_DCTTX031L2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCTTX031L2
*  INTO TABLE @DATA(IT_DCTTX031L22).
*--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_DCTTX031L2 INDEX 1 INTO DATA(WA_DCTTX031L22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DCTTX031L2 ASSIGNING <DCTTX031L2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCTTX031L2>-TABNAME = 1.
<DCTTX031L2>-POSITION = 1.
<DCTTX031L2>-FLAG1 = 1.
<DCTTX031L2>-FLAG2 = 1.
<DCTTX031L2>-FLAG3 = 1.

ENDLOOP.

LOOP AT IT_DCTTX031L2 INTO WA_DCTTX031L2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCTTX031L2-FLAG4, sy-vline,
  WA_DCTTX031L2-DBTABPOS, sy-vline,
  WA_DCTTX031L2-FIELDTYPE, sy-vline,
  WA_DCTTX031L2-OFFSET, sy-vline,
  WA_DCTTX031L2-DBLENGTH, sy-vline,
  WA_DCTTX031L2-DBLENGTH2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCTTX031L2 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_DCTTX031L2 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_DCTTX031L2 INTO WA_DCTTX031L2.


*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_DCTTX031L2_STR, 
TABNAME TYPE STRING,
POSITION TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
DBTABPOS TYPE STRING,
FIELDTYPE TYPE STRING,
OFFSET TYPE STRING,
DBLENGTH TYPE STRING,
DBLENGTH2 TYPE STRING,
EXLENGTH TYPE STRING,
DECIMALS TYPE STRING,
DEPTH TYPE STRING,
FLDALIGN TYPE STRING,
FIELDNAME TYPE STRING,
ROLLNAME TYPE STRING,
ABTYPE TYPE STRING,
DTYP TYPE STRING,
EXID TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
PRECFIELD TYPE STRING,
CONVEXIT TYPE STRING,
MEMORYID TYPE STRING,
CHECKTABLE TYPE STRING,
DIGITS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCTTX031L2_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_DCTTX031L2_STR-TABNAME sy-vline 
WA_DCTTX031L2_STR-POSITION sy-vline 
WA_DCTTX031L2_STR-FLAG1 sy-vline 
WA_DCTTX031L2_STR-FLAG2 sy-vline 
WA_DCTTX031L2_STR-FLAG3 sy-vline 
WA_DCTTX031L2_STR-FLAG4 sy-vline 
WA_DCTTX031L2_STR-DBTABPOS sy-vline 
WA_DCTTX031L2_STR-FIELDTYPE sy-vline 
WA_DCTTX031L2_STR-OFFSET sy-vline 
WA_DCTTX031L2_STR-DBLENGTH sy-vline 
WA_DCTTX031L2_STR-DBLENGTH2 sy-vline 
WA_DCTTX031L2_STR-EXLENGTH sy-vline 
WA_DCTTX031L2_STR-DECIMALS sy-vline 
WA_DCTTX031L2_STR-DEPTH sy-vline 
WA_DCTTX031L2_STR-FLDALIGN sy-vline 
WA_DCTTX031L2_STR-FIELDNAME sy-vline 
WA_DCTTX031L2_STR-ROLLNAME sy-vline 
WA_DCTTX031L2_STR-ABTYPE sy-vline 
WA_DCTTX031L2_STR-DTYP sy-vline 
WA_DCTTX031L2_STR-EXID sy-vline 
WA_DCTTX031L2_STR-REFTABLE sy-vline 
WA_DCTTX031L2_STR-REFFIELD sy-vline 
WA_DCTTX031L2_STR-PRECFIELD sy-vline 
WA_DCTTX031L2_STR-CONVEXIT sy-vline 
WA_DCTTX031L2_STR-MEMORYID sy-vline 
WA_DCTTX031L2_STR-CHECKTABLE sy-vline 
WA_DCTTX031L2_STR-DIGITS sy-vline      INTO ld_text SEPARATED BY SPACE.

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