ABAP Select data from SAP table TRCON_DB_DATA_TO_READ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRCON_DB_DATA_TO_READ
*  INTO TABLE @DATA(IT_TRCON_DB_DATA_TO_READ2).
*--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_TRCON_DB_DATA_TO_READ INDEX 1 INTO DATA(WA_TRCON_DB_DATA_TO_READ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRCON_DB_DATA_TO_READ>-TVKO = 1.
<TRCON_DB_DATA_TO_READ>-T001 = 1.
<TRCON_DB_DATA_TO_READ>-KNA1 = 1.
<TRCON_DB_DATA_TO_READ>-TVBUR = 1.
<TRCON_DB_DATA_TO_READ>-HD_GEN_TXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRCON_DB_DATA_TO_READ-SD_HD_GEN_TXT, sy-vline,
  WA_TRCON_DB_DATA_TO_READ-T176T, sy-vline,
  WA_TRCON_DB_DATA_TO_READ-T691N, sy-vline,
  WA_TRCON_DB_DATA_TO_READ-TB2BE, sy-vline,
  WA_TRCON_DB_DATA_TO_READ-T023T, sy-vline,
  WA_TRCON_DB_DATA_TO_READ-T438T, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRCON_DB_DATA_TO_READ 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_TRCON_DB_DATA_TO_READ 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_TRCON_DB_DATA_TO_READ INTO WA_TRCON_DB_DATA_TO_READ.


*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_TRCON_DB_DATA_TO_READ_STR, 
TVKO TYPE STRING,
T001 TYPE STRING,
KNA1 TYPE STRING,
TVBUR TYPE STRING,
HD_GEN_TXT TYPE STRING,
SD_HD_GEN_TXT TYPE STRING,
T176T TYPE STRING,
T691N TYPE STRING,
TB2BE TYPE STRING,
T023T TYPE STRING,
T438T TYPE STRING,
TGSBT TYPE STRING,
SD_IT_GEN_TXT TYPE STRING,
SD_IT_ORG_TXT TYPE STRING,
TVST TYPE STRING,
T001W TYPE STRING,
T001L TYPE STRING,
SD_IT_COND TYPE STRING,
MM_IT_COND TYPE STRING,
SD_TINCT TYPE STRING,
MM_TINCT TYPE STRING,
TVFST TYPE STRING,
T042Z TYPE STRING,
SD_TVZBT TYPE STRING,
MM_TVZBT TYPE STRING,
TVKOT TYPE STRING,
TVTWT TYPE STRING,
TVKBT TYPE STRING,
TVGRT TYPE STRING,
PLANNED_COSTS TYPE STRING,
HD_ADR TYPE STRING,
HD_PARTNER TYPE STRING,
SD_KOMP TYPE STRING,
MM_KOMP TYPE STRING,
T024E TYPE STRING,
TPRG TYPE STRING,
T161T TYPE STRING,
T024 TYPE STRING,
T027B TYPE STRING,
LFA1 TYPE STRING,
T001G TYPE STRING,
TB2BWEBPROFILE TYPE STRING,
SD_KOMK TYPE STRING,
MM_KOMK TYPE STRING,
MM_PPE_D_ITEM_LIST TYPE STRING,
SD_PPE_D_ITEM_LIST TYPE STRING,
MM_COMSUB TYPE STRING,
MM_PRASP TYPE STRING,
SD_COMSUB TYPE STRING,
SD_PRASP TYPE STRING,
MM_PPE_DESCRIPT TYPE STRING,
SD_PPE_DESCRIPT TYPE STRING,
MM_LOP_LIST TYPE STRING,
MM_LOP_LIST_DESCR TYPE STRING,
MM_LOP_LIST_FOR_HEAD TYPE STRING,
SD_LOP_LIST TYPE STRING,
SD_LOP_LIST_DESCR TYPE STRING,
SD_LOP_LIST_FOR_HEAD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRCON_DB_DATA_TO_READ_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_TRCON_DB_DATA_TO_READ_STR-TVKO sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T001 sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-KNA1 sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVBUR sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-HD_GEN_TXT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_HD_GEN_TXT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T176T sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T691N sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TB2BE sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T023T sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T438T sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TGSBT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_IT_GEN_TXT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_IT_ORG_TXT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T001W sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T001L sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_IT_COND sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_IT_COND sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_TINCT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_TINCT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVFST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T042Z sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_TVZBT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_TVZBT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVKOT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVTWT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVKBT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TVGRT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-PLANNED_COSTS sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-HD_ADR sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-HD_PARTNER sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_KOMP sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_KOMP sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T024E sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TPRG sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T161T sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T024 sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T027B sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-LFA1 sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-T001G sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-TB2BWEBPROFILE sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_KOMK sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_KOMK sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_PPE_D_ITEM_LIST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_PPE_D_ITEM_LIST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_COMSUB sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_PRASP sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_COMSUB sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_PRASP sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_PPE_DESCRIPT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_PPE_DESCRIPT sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_LOP_LIST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_LOP_LIST_DESCR sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-MM_LOP_LIST_FOR_HEAD sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_LOP_LIST sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_LOP_LIST_DESCR sy-vline 
WA_TRCON_DB_DATA_TO_READ_STR-SD_LOP_LIST_FOR_HEAD sy-vline      INTO ld_text SEPARATED BY SPACE.

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