ABAP Select data from SAP table CATS_ITS_PERSDATA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CATS_ITS_PERSDATA 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_ITS_PERSDATA. 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_ITS_PERSDATA 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_ITS_PERSDATA TYPE STANDARD TABLE OF CATS_ITS_PERSDATA,
      WA_CATS_ITS_PERSDATA TYPE CATS_ITS_PERSDATA,
      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_ITS_PERSDATA> TYPE CATS_ITS_PERSDATA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CATS_ITS_PERSDATA
*  INTO TABLE @DATA(IT_CATS_ITS_PERSDATA2).
*--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_ITS_PERSDATA INDEX 1 INTO DATA(WA_CATS_ITS_PERSDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CATS_ITS_PERSDATA>-USERNAME = 1.
<CATS_ITS_PERSDATA>-DCPFM = 1.
<CATS_ITS_PERSDATA>-PERNR = 1.
<CATS_ITS_PERSDATA>-COMPANYCODE = 1.
<CATS_ITS_PERSDATA>-BUSINESSAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CATS_ITS_PERSDATA-PERSONNELAREA, sy-vline,
  WA_CATS_ITS_PERSDATA-PERSSUBAREA, sy-vline,
  WA_CATS_ITS_PERSDATA-ENAME, sy-vline,
  WA_CATS_ITS_PERSDATA-CONTROLLINGAREA, sy-vline,
  WA_CATS_ITS_PERSDATA-COSTCENTER, sy-vline,
  WA_CATS_ITS_PERSDATA-NAMEOFCOSTCENTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CATS_ITS_PERSDATA 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_ITS_PERSDATA 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_ITS_PERSDATA INTO WA_CATS_ITS_PERSDATA.


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

*Conversion exit ALPHA, internal->external for field KOSTL315
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_ITS_PERSDATA-KOSTL315
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_ITS_PERSDATA-KOSTL315.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR315
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_ITS_PERSDATA-LIFNR315
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_ITS_PERSDATA-LIFNR315.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBELN315
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_ITS_PERSDATA-EBELN315
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_ITS_PERSDATA-EBELN315.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LSTNR315
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_ITS_PERSDATA-LSTNR315
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_ITS_PERSDATA-LSTNR315.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SPRZNR315
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CATS_ITS_PERSDATA-SPRZNR315
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CATS_ITS_PERSDATA-SPRZNR315.
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_CATS_ITS_PERSDATA_STR, 
USERNAME TYPE STRING,
DCPFM TYPE STRING,
PERNR TYPE STRING,
COMPANYCODE TYPE STRING,
BUSINESSAREA TYPE STRING,
PERSONNELAREA TYPE STRING,
PERSSUBAREA TYPE STRING,
ENAME TYPE STRING,
CONTROLLINGAREA TYPE STRING,
COSTCENTER TYPE STRING,
NAMEOFCOSTCENTER TYPE STRING,
VARIANT TYPE STRING,
KOSTL315 TYPE STRING,
LSTAR315 TYPE STRING,
PLSTA315 TYPE STRING,
WERKS315 TYPE STRING,
LIFNR315 TYPE STRING,
EBELN315 TYPE STRING,
EBELP315 TYPE STRING,
LSTNR315 TYPE STRING,
SPRZNR315 TYPE STRING,
ACCNT315 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CATS_ITS_PERSDATA_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_ITS_PERSDATA_STR-USERNAME sy-vline 
WA_CATS_ITS_PERSDATA_STR-DCPFM sy-vline 
WA_CATS_ITS_PERSDATA_STR-PERNR sy-vline 
WA_CATS_ITS_PERSDATA_STR-COMPANYCODE sy-vline 
WA_CATS_ITS_PERSDATA_STR-BUSINESSAREA sy-vline 
WA_CATS_ITS_PERSDATA_STR-PERSONNELAREA sy-vline 
WA_CATS_ITS_PERSDATA_STR-PERSSUBAREA sy-vline 
WA_CATS_ITS_PERSDATA_STR-ENAME sy-vline 
WA_CATS_ITS_PERSDATA_STR-CONTROLLINGAREA sy-vline 
WA_CATS_ITS_PERSDATA_STR-COSTCENTER sy-vline 
WA_CATS_ITS_PERSDATA_STR-NAMEOFCOSTCENTER sy-vline 
WA_CATS_ITS_PERSDATA_STR-VARIANT sy-vline 
WA_CATS_ITS_PERSDATA_STR-KOSTL315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-LSTAR315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-PLSTA315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-WERKS315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-LIFNR315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-EBELN315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-EBELP315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-LSTNR315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-SPRZNR315 sy-vline 
WA_CATS_ITS_PERSDATA_STR-ACCNT315 sy-vline      INTO ld_text SEPARATED BY SPACE.

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