ABAP Select data from SAP table CDSOLMIG_DD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDSOLMIG_DD
*  INTO TABLE @DATA(IT_CDSOLMIG_DD2).
*--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_CDSOLMIG_DD INDEX 1 INTO DATA(WA_CDSOLMIG_DD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDSOLMIG_DD>-MANDANT_OLD = 1.
<CDSOLMIG_DD>-RELEASE_OLD = 1.
<CDSOLMIG_DD>-SYSID_OLD = 1.
<CDSOLMIG_DD>-RUNNR = 1.
<CDSOLMIG_DD>-USERNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDSOLMIG_DD-UDATE, sy-vline,
  WA_CDSOLMIG_DD-UTIME, sy-vline,
  WA_CDSOLMIG_DD-TABNAME, sy-vline,
  WA_CDSOLMIG_DD-FNAME, sy-vline,
  WA_CDSOLMIG_DD-TABFDPOS, sy-vline,
  WA_CDSOLMIG_DD-KEYFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDSOLMIG_DD 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_CDSOLMIG_DD 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_CDSOLMIG_DD INTO WA_CDSOLMIG_DD.


*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 RUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CDSOLMIG_DD-RUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDSOLMIG_DD-RUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CDSOLMIG_DD-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDSOLMIG_DD-DATATYPE.
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_CDSOLMIG_DD_STR, 
MANDANT_OLD TYPE STRING,
RELEASE_OLD TYPE STRING,
SYSID_OLD TYPE STRING,
RUNNR TYPE STRING,
USERNAME TYPE STRING,
UDATE TYPE STRING,
UTIME TYPE STRING,
TABNAME TYPE STRING,
FNAME TYPE STRING,
TABFDPOS TYPE STRING,
KEYFLAG TYPE STRING,
LOGFLAG TYPE STRING,
INTTYPE TYPE STRING,
DATATYPE TYPE STRING,
INTLEN TYPE STRING,
LENG TYPE STRING,
OUTPUTLEN TYPE STRING,
CONVEXIT TYPE STRING,
KOMMENTAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDSOLMIG_DD_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_CDSOLMIG_DD_STR-MANDANT_OLD sy-vline 
WA_CDSOLMIG_DD_STR-RELEASE_OLD sy-vline 
WA_CDSOLMIG_DD_STR-SYSID_OLD sy-vline 
WA_CDSOLMIG_DD_STR-RUNNR sy-vline 
WA_CDSOLMIG_DD_STR-USERNAME sy-vline 
WA_CDSOLMIG_DD_STR-UDATE sy-vline 
WA_CDSOLMIG_DD_STR-UTIME sy-vline 
WA_CDSOLMIG_DD_STR-TABNAME sy-vline 
WA_CDSOLMIG_DD_STR-FNAME sy-vline 
WA_CDSOLMIG_DD_STR-TABFDPOS sy-vline 
WA_CDSOLMIG_DD_STR-KEYFLAG sy-vline 
WA_CDSOLMIG_DD_STR-LOGFLAG sy-vline 
WA_CDSOLMIG_DD_STR-INTTYPE sy-vline 
WA_CDSOLMIG_DD_STR-DATATYPE sy-vline 
WA_CDSOLMIG_DD_STR-INTLEN sy-vline 
WA_CDSOLMIG_DD_STR-LENG sy-vline 
WA_CDSOLMIG_DD_STR-OUTPUTLEN sy-vline 
WA_CDSOLMIG_DD_STR-CONVEXIT sy-vline 
WA_CDSOLMIG_DD_STR-KOMMENTAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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