ABAP Select data from SAP table CSM_UPD_C into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSM_UPD_C
*  INTO TABLE @DATA(IT_CSM_UPD_C2).
*--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_CSM_UPD_C INDEX 1 INTO DATA(WA_CSM_UPD_C2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CSM_UPD_C>-UPDROW = 1.
<CSM_UPD_C>-SYSID = 1.
<CSM_UPD_C>-CONTEXT = 1.
<CSM_UPD_C>-CONTXTSTAT = 1.
<CSM_UPD_C>-CTXCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSM_UPD_C-CTXOWNER, sy-vline,
  WA_CSM_UPD_C-SEGMENT, sy-vline,
  WA_CSM_UPD_C-SEGMENTTYP, sy-vline,
  WA_CSM_UPD_C-DESTINAT, sy-vline,
  WA_CSM_UPD_C-SEGMSTATUS, sy-vline,
  WA_CSM_UPD_C-RESP_MSSY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSM_UPD_C 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_CSM_UPD_C 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_CSM_UPD_C INTO WA_CSM_UPD_C.


*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_CSM_UPD_C_STR, 
UPDROW TYPE STRING,
SYSID TYPE STRING,
CONTEXT TYPE STRING,
CONTXTSTAT TYPE STRING,
CTXCLASS TYPE STRING,
CTXOWNER TYPE STRING,
SEGMENT TYPE STRING,
SEGMENTTYP TYPE STRING,
DESTINAT TYPE STRING,
SEGMSTATUS TYPE STRING,
RESP_MSSY TYPE STRING,
VERSION TYPE STRING,
CHG_USER TYPE STRING,
CHG_DATE TYPE STRING,
CHG_TIME TYPE STRING,
SEGSTATMST TYPE STRING,
SEGSTATCNT TYPE STRING,
SEGMSERVER TYPE STRING,
SEGMHOST TYPE STRING,
CONTXTTYPE TYPE STRING,
CTX_SYSID TYPE STRING,
CTX_MCNAME TYPE STRING,
CTX_NUMRNG TYPE STRING,
CTX_UID TYPE STRING,
CTX_CLAS TYPE STRING,
CTX_INDEX TYPE STRING,
CTX_EXTIDX TYPE STRING,
RESERVE_C TYPE STRING,
RESERVE_I TYPE STRING,
CTXCLIENT TYPE STRING,
CSMSYSID TYPE STRING,
DESTINAT_2 TYPE STRING,
UPDMODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CSM_UPD_C_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_CSM_UPD_C_STR-UPDROW sy-vline 
WA_CSM_UPD_C_STR-SYSID sy-vline 
WA_CSM_UPD_C_STR-CONTEXT sy-vline 
WA_CSM_UPD_C_STR-CONTXTSTAT sy-vline 
WA_CSM_UPD_C_STR-CTXCLASS sy-vline 
WA_CSM_UPD_C_STR-CTXOWNER sy-vline 
WA_CSM_UPD_C_STR-SEGMENT sy-vline 
WA_CSM_UPD_C_STR-SEGMENTTYP sy-vline 
WA_CSM_UPD_C_STR-DESTINAT sy-vline 
WA_CSM_UPD_C_STR-SEGMSTATUS sy-vline 
WA_CSM_UPD_C_STR-RESP_MSSY sy-vline 
WA_CSM_UPD_C_STR-VERSION sy-vline 
WA_CSM_UPD_C_STR-CHG_USER sy-vline 
WA_CSM_UPD_C_STR-CHG_DATE sy-vline 
WA_CSM_UPD_C_STR-CHG_TIME sy-vline 
WA_CSM_UPD_C_STR-SEGSTATMST sy-vline 
WA_CSM_UPD_C_STR-SEGSTATCNT sy-vline 
WA_CSM_UPD_C_STR-SEGMSERVER sy-vline 
WA_CSM_UPD_C_STR-SEGMHOST sy-vline 
WA_CSM_UPD_C_STR-CONTXTTYPE sy-vline 
WA_CSM_UPD_C_STR-CTX_SYSID sy-vline 
WA_CSM_UPD_C_STR-CTX_MCNAME sy-vline 
WA_CSM_UPD_C_STR-CTX_NUMRNG sy-vline 
WA_CSM_UPD_C_STR-CTX_UID sy-vline 
WA_CSM_UPD_C_STR-CTX_CLAS sy-vline 
WA_CSM_UPD_C_STR-CTX_INDEX sy-vline 
WA_CSM_UPD_C_STR-CTX_EXTIDX sy-vline 
WA_CSM_UPD_C_STR-RESERVE_C sy-vline 
WA_CSM_UPD_C_STR-RESERVE_I sy-vline 
WA_CSM_UPD_C_STR-CTXCLIENT sy-vline 
WA_CSM_UPD_C_STR-CSMSYSID sy-vline 
WA_CSM_UPD_C_STR-DESTINAT_2 sy-vline 
WA_CSM_UPD_C_STR-UPDMODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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