ABAP Select data from SAP table TCATS_SSC_FLDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCATS_SSC_FLDS
*  INTO TABLE @DATA(IT_TCATS_SSC_FLDS2).
*--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_TCATS_SSC_FLDS INDEX 1 INTO DATA(WA_TCATS_SSC_FLDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCATS_SSC_FLDS>-MANDT = 1.
<TCATS_SSC_FLDS>-VARIANT = 1.
<TCATS_SSC_FLDS>-MISSINGTIME = 1.
<TCATS_SSC_FLDS>-EXTMODE = 1.
<TCATS_SSC_FLDS>-RKOSTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCATS_SSC_FLDS-LSTAR, sy-vline,
  WA_TCATS_SSC_FLDS-RAUFNR, sy-vline,
  WA_TCATS_SSC_FLDS-RPROJ, sy-vline,
  WA_TCATS_SSC_FLDS-MINTIMESLOT, sy-vline,
  WA_TCATS_SSC_FLDS-TIMESLOTINTERVAL, sy-vline,
  WA_TCATS_SSC_FLDS-WRKLOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCATS_SSC_FLDS 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_TCATS_SSC_FLDS 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_TCATS_SSC_FLDS INTO WA_TCATS_SSC_FLDS.


*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_TCATS_SSC_FLDS_STR, 
MANDT TYPE STRING,
VARIANT TYPE STRING,
MISSINGTIME TYPE STRING,
EXTMODE TYPE STRING,
RKOSTL TYPE STRING,
LSTAR TYPE STRING,
RAUFNR TYPE STRING,
RPROJ TYPE STRING,
MINTIMESLOT TYPE STRING,
TIMESLOTINTERVAL TYPE STRING,
WRKLOC TYPE STRING,
UNSTAFFEDPROJ TYPE STRING,
OVERTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCATS_SSC_FLDS_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_TCATS_SSC_FLDS_STR-MANDT sy-vline 
WA_TCATS_SSC_FLDS_STR-VARIANT sy-vline 
WA_TCATS_SSC_FLDS_STR-MISSINGTIME sy-vline 
WA_TCATS_SSC_FLDS_STR-EXTMODE sy-vline 
WA_TCATS_SSC_FLDS_STR-RKOSTL sy-vline 
WA_TCATS_SSC_FLDS_STR-LSTAR sy-vline 
WA_TCATS_SSC_FLDS_STR-RAUFNR sy-vline 
WA_TCATS_SSC_FLDS_STR-RPROJ sy-vline 
WA_TCATS_SSC_FLDS_STR-MINTIMESLOT sy-vline 
WA_TCATS_SSC_FLDS_STR-TIMESLOTINTERVAL sy-vline 
WA_TCATS_SSC_FLDS_STR-WRKLOC sy-vline 
WA_TCATS_SSC_FLDS_STR-UNSTAFFEDPROJ sy-vline 
WA_TCATS_SSC_FLDS_STR-OVERTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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