ABAP Select data from SAP table TRREQSTATE into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TRREQSTATE 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 TRREQSTATE. 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 TRREQSTATE 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_TRREQSTATE TYPE STANDARD TABLE OF TRREQSTATE,
      WA_TRREQSTATE TYPE TRREQSTATE,
      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: <TRREQSTATE> TYPE TRREQSTATE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRREQSTATE
*  INTO TABLE @DATA(IT_TRREQSTATE2).
*--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_TRREQSTATE INDEX 1 INTO DATA(WA_TRREQSTATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRREQSTATE>-ACTION = 1.
<TRREQSTATE>-ACTIVETAB = 1.
<TRREQSTATE>-SAVE_HEADR = 1.
<TRREQSTATE>-SAVE_OBJ = 1.
<TRREQSTATE>-SAVE_DOCU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRREQSTATE-CURS_HEADR, sy-vline,
  WA_TRREQSTATE-FIELDNAME, sy-vline,
  WA_TRREQSTATE-OFFSET, sy-vline,
  WA_TRREQSTATE-LINE, sy-vline,
  WA_TRREQSTATE-HEADERLINE, sy-vline,
  WA_TRREQSTATE-FIRST_LINE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRREQSTATE 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_TRREQSTATE 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_TRREQSTATE INTO WA_TRREQSTATE.


*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 ISOLA, internal->external for field LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRREQSTATE-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRREQSTATE-LANG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TRREQSTATE-LANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRREQSTATE-LANG.
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_TRREQSTATE_STR, 
ACTION TYPE STRING,
ACTIVETAB TYPE STRING,
SAVE_HEADR TYPE STRING,
SAVE_OBJ TYPE STRING,
SAVE_DOCU TYPE STRING,
CURS_HEADR TYPE STRING,
FIELDNAME TYPE STRING,
OFFSET TYPE STRING,
LINE TYPE STRING,
HEADERLINE TYPE STRING,
FIRST_LINE TYPE STRING,
SHOW_KLE TYPE STRING,
NAVIGATION TYPE STRING,
SHOW_KLE TYPE STRING,
OBJECT TYPE STRING,
TRKORR TYPE STRING,
AS4POS TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
OBJFUNC TYPE STRING,
LOCKFLAG TYPE STRING,
GENNUM TYPE STRING,
LANG TYPE STRING,
ACTIVITY TYPE STRING,
OBJECTNAME TYPE STRING,
OBJECTTYPE TYPE STRING,
OBJECTACTN TYPE STRING,
FCODE TYPE STRING,
OLE TYPE STRING,
SELECTION TYPE STRING,
RANGES TYPE STRING,
TRKORR TYPE STRING,
AS4POS TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
OBJFUNC TYPE STRING,
LOCKFLAG TYPE STRING,
GENNUM TYPE STRING,
LANG TYPE STRING,
ACTIVITY TYPE STRING,
MAX_SELECT TYPE STRING,
CURSOR TYPE STRING,
FIELDNAME TYPE STRING,
OFFSET TYPE STRING,
LINE TYPE STRING,
OBJ_W_CRSR TYPE STRING,
TOP_OBJECT TYPE STRING,
MARKS TYPE STRING,
KLE TYPE STRING,
CURR_OBJ TYPE STRING,
TRKORR TYPE STRING,
AS4POS TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJ_NAME TYPE STRING,
OBJFUNC TYPE STRING,
LOCKFLAG TYPE STRING,
GENNUM TYPE STRING,
LANG TYPE STRING,
ACTIVITY TYPE STRING,
CO_OBJNAME TYPE STRING,
CO_OBJTYPE TYPE STRING,
CURSOR TYPE STRING,
FIELDNAME TYPE STRING,
OFFSET TYPE STRING,
LINE TYPE STRING,
KEY_W_CRSR TYPE STRING,
TRKORR TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJNAME TYPE STRING,
AS4POS TYPE STRING,
TOP_KEY TYPE STRING,
TRKORR TYPE STRING,
PGMID TYPE STRING,
OBJECT TYPE STRING,
OBJNAME TYPE STRING,
AS4POS TYPE STRING,
MARKS TYPE STRING,
PRINTPARTS TYPE STRING,
HEADER TYPE STRING,
OBJECTS TYPE STRING,
KEYS TYPE STRING,
DOCU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRREQSTATE_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_TRREQSTATE_STR-ACTION sy-vline 
WA_TRREQSTATE_STR-ACTIVETAB sy-vline 
WA_TRREQSTATE_STR-SAVE_HEADR sy-vline 
WA_TRREQSTATE_STR-SAVE_OBJ sy-vline 
WA_TRREQSTATE_STR-SAVE_DOCU sy-vline 
WA_TRREQSTATE_STR-CURS_HEADR sy-vline 
WA_TRREQSTATE_STR-FIELDNAME sy-vline 
WA_TRREQSTATE_STR-OFFSET sy-vline 
WA_TRREQSTATE_STR-LINE sy-vline 
WA_TRREQSTATE_STR-HEADERLINE sy-vline 
WA_TRREQSTATE_STR-FIRST_LINE sy-vline 
WA_TRREQSTATE_STR-SHOW_KLE sy-vline 
WA_TRREQSTATE_STR-NAVIGATION sy-vline 
WA_TRREQSTATE_STR-SHOW_KLE sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-TRKORR sy-vline 
WA_TRREQSTATE_STR-AS4POS sy-vline 
WA_TRREQSTATE_STR-PGMID sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-OBJ_NAME sy-vline 
WA_TRREQSTATE_STR-OBJFUNC sy-vline 
WA_TRREQSTATE_STR-LOCKFLAG sy-vline 
WA_TRREQSTATE_STR-GENNUM sy-vline 
WA_TRREQSTATE_STR-LANG sy-vline 
WA_TRREQSTATE_STR-ACTIVITY sy-vline 
WA_TRREQSTATE_STR-OBJECTNAME sy-vline 
WA_TRREQSTATE_STR-OBJECTTYPE sy-vline 
WA_TRREQSTATE_STR-OBJECTACTN sy-vline 
WA_TRREQSTATE_STR-FCODE sy-vline 
WA_TRREQSTATE_STR-OLE sy-vline 
WA_TRREQSTATE_STR-SELECTION sy-vline 
WA_TRREQSTATE_STR-RANGES sy-vline 
WA_TRREQSTATE_STR-TRKORR sy-vline 
WA_TRREQSTATE_STR-AS4POS sy-vline 
WA_TRREQSTATE_STR-PGMID sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-OBJ_NAME sy-vline 
WA_TRREQSTATE_STR-OBJFUNC sy-vline 
WA_TRREQSTATE_STR-LOCKFLAG sy-vline 
WA_TRREQSTATE_STR-GENNUM sy-vline 
WA_TRREQSTATE_STR-LANG sy-vline 
WA_TRREQSTATE_STR-ACTIVITY sy-vline 
WA_TRREQSTATE_STR-MAX_SELECT sy-vline 
WA_TRREQSTATE_STR-CURSOR sy-vline 
WA_TRREQSTATE_STR-FIELDNAME sy-vline 
WA_TRREQSTATE_STR-OFFSET sy-vline 
WA_TRREQSTATE_STR-LINE sy-vline 
WA_TRREQSTATE_STR-OBJ_W_CRSR sy-vline 
WA_TRREQSTATE_STR-TOP_OBJECT sy-vline 
WA_TRREQSTATE_STR-MARKS sy-vline 
WA_TRREQSTATE_STR-KLE sy-vline 
WA_TRREQSTATE_STR-CURR_OBJ sy-vline 
WA_TRREQSTATE_STR-TRKORR sy-vline 
WA_TRREQSTATE_STR-AS4POS sy-vline 
WA_TRREQSTATE_STR-PGMID sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-OBJ_NAME sy-vline 
WA_TRREQSTATE_STR-OBJFUNC sy-vline 
WA_TRREQSTATE_STR-LOCKFLAG sy-vline 
WA_TRREQSTATE_STR-GENNUM sy-vline 
WA_TRREQSTATE_STR-LANG sy-vline 
WA_TRREQSTATE_STR-ACTIVITY sy-vline 
WA_TRREQSTATE_STR-CO_OBJNAME sy-vline 
WA_TRREQSTATE_STR-CO_OBJTYPE sy-vline 
WA_TRREQSTATE_STR-CURSOR sy-vline 
WA_TRREQSTATE_STR-FIELDNAME sy-vline 
WA_TRREQSTATE_STR-OFFSET sy-vline 
WA_TRREQSTATE_STR-LINE sy-vline 
WA_TRREQSTATE_STR-KEY_W_CRSR sy-vline 
WA_TRREQSTATE_STR-TRKORR sy-vline 
WA_TRREQSTATE_STR-PGMID sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-OBJNAME sy-vline 
WA_TRREQSTATE_STR-AS4POS sy-vline 
WA_TRREQSTATE_STR-TOP_KEY sy-vline 
WA_TRREQSTATE_STR-TRKORR sy-vline 
WA_TRREQSTATE_STR-PGMID sy-vline 
WA_TRREQSTATE_STR-OBJECT sy-vline 
WA_TRREQSTATE_STR-OBJNAME sy-vline 
WA_TRREQSTATE_STR-AS4POS sy-vline 
WA_TRREQSTATE_STR-MARKS sy-vline 
WA_TRREQSTATE_STR-PRINTPARTS sy-vline 
WA_TRREQSTATE_STR-HEADER sy-vline 
WA_TRREQSTATE_STR-OBJECTS sy-vline 
WA_TRREQSTATE_STR-KEYS sy-vline 
WA_TRREQSTATE_STR-DOCU sy-vline      INTO ld_text SEPARATED BY SPACE.

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