ABAP Select data from SAP table /ISDFPS/FDPSA_FCAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /ISDFPS/FDPSA_FCAT 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 /ISDFPS/FDPSA_FCAT. 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 /ISDFPS/FDPSA_FCAT 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_/ISDFPS/FDPSA_FCAT TYPE STANDARD TABLE OF /ISDFPS/FDPSA_FCAT,
      WA_/ISDFPS/FDPSA_FCAT TYPE /ISDFPS/FDPSA_FCAT,
      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: </ISDFPS/FDPSA_FCAT> TYPE /ISDFPS/FDPSA_FCAT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /ISDFPS/FDPSA_FCAT
  INTO TABLE IT_/ISDFPS/FDPSA_FCAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/FDPSA_FCAT
*  INTO TABLE @DATA(IT_/ISDFPS/FDPSA_FCAT2).
*--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_/ISDFPS/FDPSA_FCAT INDEX 1 INTO DATA(WA_/ISDFPS/FDPSA_FCAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/ISDFPS/FDPSA_FCAT ASSIGNING </ISDFPS/FDPSA_FCAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/FDPSA_FCAT>-VBEGDA = 1.
</ISDFPS/FDPSA_FCAT>-VENDDA = 1.
</ISDFPS/FDPSA_FCAT>-BEGDA = 1.
</ISDFPS/FDPSA_FCAT>-ENDDA = 1.
</ISDFPS/FDPSA_FCAT>-OTYPE_HROBJID = 1.

ENDLOOP.

LOOP AT IT_/ISDFPS/FDPSA_FCAT INTO WA_/ISDFPS/FDPSA_FCAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/FDPSA_FCAT-SHORT, sy-vline,
  WA_/ISDFPS/FDPSA_FCAT-RELAT_DESC, sy-vline,
  WA_/ISDFPS/FDPSA_FCAT-OPEX_STEXT, sy-vline,
  WA_/ISDFPS/FDPSA_FCAT-OPEX_CON_NAME, sy-vline,
  WA_/ISDFPS/FDPSA_FCAT-OPEX_OBJID_COM_STEXT, sy-vline,
  WA_/ISDFPS/FDPSA_FCAT-OPEX_PROVIDER_MAT_STEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/FDPSA_FCAT 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_/ISDFPS/FDPSA_FCAT 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_/ISDFPS/FDPSA_FCAT INTO WA_/ISDFPS/FDPSA_FCAT.


*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 ABPSN, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/FDPSA_FCAT-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/FDPSA_FCAT-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACTIVE_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/FDPSA_FCAT-ACTIVE_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/FDPSA_FCAT-ACTIVE_LOGSYS.
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_/ISDFPS/FDPSA_FCAT_STR, 
VBEGDA TYPE STRING,
VENDDA TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
OTYPE_HROBJID TYPE STRING,
SHORT TYPE STRING,
RELAT_DESC TYPE STRING,
OPEX_STEXT TYPE STRING,
OPEX_CON_NAME TYPE STRING,
OPEX_OBJID_COM_STEXT TYPE STRING,
OPEX_PROVIDER_MAT_STEXT TYPE STRING,
OPEX_PROVIDER_PER_STEXT TYPE STRING,
FORCE_LEVEL TYPE STRING,
SERVICE TYPE STRING,
BRANCH TYPE STRING,
OWNER_NATION TYPE STRING,
LEVEL_GROUP TYPE STRING,
AGENCY TYPE STRING,
PSPNR TYPE STRING,
WERKS_S TYPE STRING,
BERID_S TYPE STRING,
LGORTACNT TYPE STRING,
BERID_P TYPE STRING,
LA_ARBPL TYPE STRING,
LA_WERKS_D TYPE STRING,
WERKS_RE TYPE STRING,
BERID_RE TYPE STRING,
LGORT_RE TYPE STRING,
READINESS_PERS TYPE STRING,
READINESS_MAT TYPE STRING,
READINESS_TRAI TYPE STRING,
READINESS_THRES TYPE STRING,
POSITION_COUNT TYPE STRING,
PERSON_COUNT TYPE STRING,
ACTIVE_LOGSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/FDPSA_FCAT_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_/ISDFPS/FDPSA_FCAT_STR-VBEGDA sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-VENDDA sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-BEGDA sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-ENDDA sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OTYPE_HROBJID sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-SHORT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-RELAT_DESC sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OPEX_STEXT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OPEX_CON_NAME sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OPEX_OBJID_COM_STEXT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OPEX_PROVIDER_MAT_STEXT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OPEX_PROVIDER_PER_STEXT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-FORCE_LEVEL sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-SERVICE sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-BRANCH sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-OWNER_NATION sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-LEVEL_GROUP sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-AGENCY sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-PSPNR sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-WERKS_S sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-BERID_S sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-LGORTACNT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-BERID_P sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-LA_ARBPL sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-LA_WERKS_D sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-WERKS_RE sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-BERID_RE sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-LGORT_RE sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-READINESS_PERS sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-READINESS_MAT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-READINESS_TRAI sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-READINESS_THRES sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-POSITION_COUNT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-PERSON_COUNT sy-vline 
WA_/ISDFPS/FDPSA_FCAT_STR-ACTIVE_LOGSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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