ABAP Select data from SAP table CATS_MY_STR_TCATS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATS_MY_STR_TCATS
*  INTO TABLE @DATA(IT_CATS_MY_STR_TCATS2).
*--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_CATS_MY_STR_TCATS INDEX 1 INTO DATA(WA_CATS_MY_STR_TCATS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATS_MY_STR_TCATS>-VARIANT = 1.
<CATS_MY_STR_TCATS>-PERTYPE = 1.
<CATS_MY_STR_TCATS>-CATSPERIOD = 1.
<CATS_MY_STR_TCATS>-UNDERTARGE = 1.
<CATS_MY_STR_TCATS>-UNDERREACT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATS_MY_STR_TCATS-OVERTARGET, sy-vline,
  WA_CATS_MY_STR_TCATS-OVERREACT, sy-vline,
  WA_CATS_MY_STR_TCATS-FUTURE, sy-vline,
  WA_CATS_MY_STR_TCATS-FREEATSAVE, sy-vline,
  WA_CATS_MY_STR_TCATS-APPROVAL, sy-vline,
  WA_CATS_MY_STR_TCATS-KOLLIREACT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATS_MY_STR_TCATS 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_CATS_MY_STR_TCATS 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_CATS_MY_STR_TCATS INTO WA_CATS_MY_STR_TCATS.


*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_CATS_MY_STR_TCATS_STR, 
VARIANT TYPE STRING,
PERTYPE TYPE STRING,
CATSPERIOD TYPE STRING,
UNDERTARGE TYPE STRING,
UNDERREACT TYPE STRING,
OVERTARGET TYPE STRING,
OVERREACT TYPE STRING,
FUTURE TYPE STRING,
FREEATSAVE TYPE STRING,
APPROVAL TYPE STRING,
KOLLIREACT TYPE STRING,
MAXHRREACT TYPE STRING,
HRCOSTASG TYPE STRING,
NOCHANGE TYPE STRING,
FIRSTDAYOF TYPE STRING,
RELDATE TYPE STRING,
REJEBRIGHT TYPE STRING,
ADDINFOBRI TYPE STRING,
DAYTEXT TYPE STRING,
BEGEND TYPE STRING,
TARGETROW TYPE STRING,
SUMROW TYPE STRING,
CHANGABLE TYPE STRING,
PERNRLIST TYPE STRING,
MULTPER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATS_MY_STR_TCATS_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_CATS_MY_STR_TCATS_STR-VARIANT sy-vline 
WA_CATS_MY_STR_TCATS_STR-PERTYPE sy-vline 
WA_CATS_MY_STR_TCATS_STR-CATSPERIOD sy-vline 
WA_CATS_MY_STR_TCATS_STR-UNDERTARGE sy-vline 
WA_CATS_MY_STR_TCATS_STR-UNDERREACT sy-vline 
WA_CATS_MY_STR_TCATS_STR-OVERTARGET sy-vline 
WA_CATS_MY_STR_TCATS_STR-OVERREACT sy-vline 
WA_CATS_MY_STR_TCATS_STR-FUTURE sy-vline 
WA_CATS_MY_STR_TCATS_STR-FREEATSAVE sy-vline 
WA_CATS_MY_STR_TCATS_STR-APPROVAL sy-vline 
WA_CATS_MY_STR_TCATS_STR-KOLLIREACT sy-vline 
WA_CATS_MY_STR_TCATS_STR-MAXHRREACT sy-vline 
WA_CATS_MY_STR_TCATS_STR-HRCOSTASG sy-vline 
WA_CATS_MY_STR_TCATS_STR-NOCHANGE sy-vline 
WA_CATS_MY_STR_TCATS_STR-FIRSTDAYOF sy-vline 
WA_CATS_MY_STR_TCATS_STR-RELDATE sy-vline 
WA_CATS_MY_STR_TCATS_STR-REJEBRIGHT sy-vline 
WA_CATS_MY_STR_TCATS_STR-ADDINFOBRI sy-vline 
WA_CATS_MY_STR_TCATS_STR-DAYTEXT sy-vline 
WA_CATS_MY_STR_TCATS_STR-BEGEND sy-vline 
WA_CATS_MY_STR_TCATS_STR-TARGETROW sy-vline 
WA_CATS_MY_STR_TCATS_STR-SUMROW sy-vline 
WA_CATS_MY_STR_TCATS_STR-CHANGABLE sy-vline 
WA_CATS_MY_STR_TCATS_STR-PERNRLIST sy-vline 
WA_CATS_MY_STR_TCATS_STR-MULTPER sy-vline      INTO ld_text SEPARATED BY SPACE.

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