ABAP Select data from SAP table GRCINT_S_FIELDCATALOG into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRCINT_S_FIELDCATALOG
*  INTO TABLE @DATA(IT_GRCINT_S_FIELDCATALOG2).
*--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_GRCINT_S_FIELDCATALOG INDEX 1 INTO DATA(WA_GRCINT_S_FIELDCATALOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRCINT_S_FIELDCATALOG>-COL_POS = 1.
<GRCINT_S_FIELDCATALOG>-FIELDNAME = 1.
<GRCINT_S_FIELDCATALOG>-TABNAME = 1.
<GRCINT_S_FIELDCATALOG>-CURRENCY = 1.
<GRCINT_S_FIELDCATALOG>-CFIELDNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRCINT_S_FIELDCATALOG-QUANTITY, sy-vline,
  WA_GRCINT_S_FIELDCATALOG-QFIELDNAME, sy-vline,
  WA_GRCINT_S_FIELDCATALOG-IFIELDNAME, sy-vline,
  WA_GRCINT_S_FIELDCATALOG-DATATYPE, sy-vline,
  WA_GRCINT_S_FIELDCATALOG-INTTYPE, sy-vline,
  WA_GRCINT_S_FIELDCATALOG-INTLEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRCINT_S_FIELDCATALOG 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_GRCINT_S_FIELDCATALOG 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_GRCINT_S_FIELDCATALOG INTO WA_GRCINT_S_FIELDCATALOG.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_GRCINT_S_FIELDCATALOG-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GRCINT_S_FIELDCATALOG-DATATYPE.
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_GRCINT_S_FIELDCATALOG_STR, 
COL_POS TYPE STRING,
FIELDNAME TYPE STRING,
TABNAME TYPE STRING,
CURRENCY TYPE STRING,
CFIELDNAME TYPE STRING,
QUANTITY TYPE STRING,
QFIELDNAME TYPE STRING,
IFIELDNAME TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
DECIMALS TYPE STRING,
COLTEXT TYPE STRING,
OUTPUTLEN TYPE STRING,
REF_FIELD TYPE STRING,
REF_TABLE TYPE STRING,
SCRTEXT_L TYPE STRING,
SCRTEXT_M TYPE STRING,
SCRTEXT_S TYPE STRING,
COLDDICTXT TYPE STRING,
SELDDICTXT TYPE STRING,
TIPDDICTXT TYPE STRING,
ANALYZEDFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRCINT_S_FIELDCATALOG_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_GRCINT_S_FIELDCATALOG_STR-COL_POS sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-FIELDNAME sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-TABNAME sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-CURRENCY sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-CFIELDNAME sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-QUANTITY sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-QFIELDNAME sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-IFIELDNAME sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-DATATYPE sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-INTTYPE sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-INTLEN sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-DECIMALS sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-COLTEXT sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-OUTPUTLEN sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-REF_FIELD sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-REF_TABLE sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-SCRTEXT_L sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-SCRTEXT_M sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-SCRTEXT_S sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-COLDDICTXT sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-SELDDICTXT sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-TIPDDICTXT sy-vline 
WA_GRCINT_S_FIELDCATALOG_STR-ANALYZEDFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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